diff --git a/Android.mk b/Android.mk
index 9d113d9..78ea02a 100644
--- a/Android.mk
+++ b/Android.mk
@@ -23,12 +23,7 @@
 LOCAL_USE_AAPT2 := true
 LOCAL_AAPT2_ONLY := true
 LOCAL_MODULE_TAGS := optional
-
-ifneq (,$(wildcard frameworks/base))
-    LOCAL_STATIC_JAVA_LIBRARIES:= PluginCoreLib
-else
-    LOCAL_STATIC_JAVA_LIBRARIES:= libPluginCore
-endif
+LOCAL_STATIC_JAVA_LIBRARIES:= PluginCoreLib
 
 LOCAL_SRC_FILES := \
     $(call all-java-files-under, src_plugins)
@@ -151,11 +146,10 @@
 LOCAL_AAPT2_ONLY := true
 LOCAL_MODULE_TAGS := optional
 
+LOCAL_STATIC_JAVA_LIBRARIES := SystemUISharedLib launcherprotosnano
 ifneq (,$(wildcard frameworks/base))
-  LOCAL_STATIC_JAVA_LIBRARIES := SystemUISharedLib launcherprotosnano
   LOCAL_PRIVATE_PLATFORM_APIS := true
 else
-  LOCAL_STATIC_JAVA_LIBRARIES := libSharedSystemUI libLauncherProtos
   LOCAL_SDK_VERSION := system_current
   LOCAL_MIN_SDK_VERSION := 26
 endif
@@ -224,11 +218,10 @@
 LOCAL_USE_AAPT2 := true
 LOCAL_MODULE_TAGS := optional
 
+LOCAL_STATIC_JAVA_LIBRARIES := SystemUISharedLib launcherprotosnano
 ifneq (,$(wildcard frameworks/base))
-  LOCAL_STATIC_JAVA_LIBRARIES := SystemUISharedLib launcherprotosnano
   LOCAL_PRIVATE_PLATFORM_APIS := true
 else
-  LOCAL_STATIC_JAVA_LIBRARIES := libSharedSystemUI libLauncherProtos
   LOCAL_SDK_VERSION := system_current
   LOCAL_MIN_SDK_VERSION := 26
 endif
@@ -271,11 +264,10 @@
 LOCAL_USE_AAPT2 := true
 LOCAL_MODULE_TAGS := optional
 
+LOCAL_STATIC_JAVA_LIBRARIES := SystemUISharedLib launcherprotosnano
 ifneq (,$(wildcard frameworks/base))
-  LOCAL_STATIC_JAVA_LIBRARIES := SystemUISharedLib launcherprotosnano
   LOCAL_PRIVATE_PLATFORM_APIS := true
 else
-  LOCAL_STATIC_JAVA_LIBRARIES := libSharedSystemUI libLauncherProtos
   LOCAL_SDK_VERSION := system_current
   LOCAL_MIN_SDK_VERSION := 26
 endif
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
new file mode 100644
index 0000000..f3db20e
--- /dev/null
+++ b/PREUPLOAD.cfg
@@ -0,0 +1,2 @@
+[Hook Scripts]
+checkstyle_hook = ${REPO_ROOT}/prebuilts/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT}
diff --git a/go/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java b/go/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java
index d0cfcf9..212ce9b 100644
--- a/go/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java
+++ b/go/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java
@@ -32,6 +32,7 @@
 import static com.android.launcher3.anim.Interpolators.OVERSHOOT_1_7;
 import static com.android.launcher3.states.RotationHelper.REQUEST_ROTATE;
 
+import android.content.Context;
 import android.view.View;
 
 import com.android.launcher3.DeviceProfile;
@@ -115,10 +116,10 @@
     }
 
     public static float getDefaultSwipeHeight(Launcher launcher) {
-        return getDefaultSwipeHeight(launcher.getDeviceProfile());
+        return getDefaultSwipeHeight(launcher, launcher.getDeviceProfile());
     }
 
-    public static float getDefaultSwipeHeight(DeviceProfile dp) {
+    public static float getDefaultSwipeHeight(Context context, DeviceProfile dp) {
         return dp.allAppsCellHeightPx - dp.allAppsIconTextSizePx;
     }
 
diff --git a/go/quickstep/src/com/android/quickstep/OverviewCommandHelper.java b/go/quickstep/src/com/android/quickstep/OverviewCommandHelper.java
index 0fa3d86..216972c 100644
--- a/go/quickstep/src/com/android/quickstep/OverviewCommandHelper.java
+++ b/go/quickstep/src/com/android/quickstep/OverviewCommandHelper.java
@@ -15,8 +15,8 @@
  */
 package com.android.quickstep;
 
-import static com.android.systemui.shared.system.ActivityManagerWrapper
-        .CLOSE_SYSTEM_WINDOWS_REASON_RECENTS;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+import static com.android.systemui.shared.system.ActivityManagerWrapper.CLOSE_SYSTEM_WINDOWS_REASON_RECENTS;
 
 import android.annotation.TargetApi;
 import android.content.Context;
@@ -25,7 +25,6 @@
 import android.view.ViewConfiguration;
 
 import com.android.launcher3.BaseDraggingActivity;
-import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.logging.UserEventDispatcher;
 import com.android.launcher3.userevent.nano.LauncherLogProto;
 import com.android.quickstep.ActivityControlHelper.ActivityInitListener;
@@ -43,7 +42,6 @@
     private final Context mContext;
     private final ActivityManagerWrapper mAM;
     private final RecentsModel mRecentsModel;
-    private final MainThreadExecutor mMainThreadExecutor;
     private final OverviewComponentObserver mOverviewComponentObserver;
 
     private long mLastToggleTime;
@@ -51,7 +49,6 @@
     public OverviewCommandHelper(Context context, OverviewComponentObserver observer) {
         mContext = context;
         mAM = ActivityManagerWrapper.getInstance();
-        mMainThreadExecutor = new MainThreadExecutor();
         mRecentsModel = RecentsModel.INSTANCE.get(mContext);
         mOverviewComponentObserver = observer;
     }
@@ -63,19 +60,19 @@
         }
 
         mAM.closeSystemWindows(CLOSE_SYSTEM_WINDOWS_REASON_RECENTS);
-        mMainThreadExecutor.execute(new RecentsActivityCommand<>());
+        MAIN_EXECUTOR.execute(new RecentsActivityCommand<>());
     }
 
     public void onOverviewShown(boolean triggeredFromAltTab) {
-        mMainThreadExecutor.execute(new ShowRecentsCommand());
+        MAIN_EXECUTOR.execute(new ShowRecentsCommand());
     }
 
     public void onOverviewHidden() {
-        mMainThreadExecutor.execute(new HideRecentsCommand());
+        MAIN_EXECUTOR.execute(new HideRecentsCommand());
     }
 
     public void onTip(int actionType, int viewType) {
-        mMainThreadExecutor.execute(() ->
+        MAIN_EXECUTOR.execute(() ->
                 UserEventDispatcher.newInstance(mContext).logActionTip(actionType, viewType));
     }
 
@@ -161,7 +158,7 @@
             // Otherwise, start overview.
             mListener = mHelper.createActivityInitListener(provider::onActivityReady);
             mListener.registerAndStartActivity(mOverviewComponentObserver.getOverviewIntent(),
-                    provider, mContext, mMainThreadExecutor.getHandler(),
+                    provider, mContext, MAIN_EXECUTOR.getHandler(),
                     provider.getRecentsLaunchDuration());
         }
 
diff --git a/go/quickstep/src/com/android/quickstep/TouchInteractionService.java b/go/quickstep/src/com/android/quickstep/TouchInteractionService.java
index 577b175..19dd82f 100644
--- a/go/quickstep/src/com/android/quickstep/TouchInteractionService.java
+++ b/go/quickstep/src/com/android/quickstep/TouchInteractionService.java
@@ -34,8 +34,6 @@
 
 import com.android.launcher3.Utilities;
 import com.android.launcher3.compat.UserManagerCompat;
-import com.android.launcher3.util.LooperExecutor;
-import com.android.launcher3.util.UiThreadHelper;
 import com.android.systemui.shared.recents.IOverviewProxy;
 import com.android.systemui.shared.recents.ISystemUiProxy;
 
@@ -139,9 +137,6 @@
         return sConnected;
     }
 
-    public static final LooperExecutor BACKGROUND_EXECUTOR =
-            new LooperExecutor(UiThreadHelper.getBackgroundLooper());
-
     private RecentsModel mRecentsModel;
     private OverviewComponentObserver mOverviewComponentObserver;
     private OverviewCommandHelper mOverviewCommandHelper;
diff --git a/go/src/com/android/launcher3/model/LoaderResults.java b/go/src/com/android/launcher3/model/LoaderResults.java
index b82f362..26c3313 100644
--- a/go/src/com/android/launcher3/model/LoaderResults.java
+++ b/go/src/com/android/launcher3/model/LoaderResults.java
@@ -16,9 +16,8 @@
 
 package com.android.launcher3.model;
 
-import com.android.launcher3.AllAppsList;
 import com.android.launcher3.LauncherAppState;
-import com.android.launcher3.LauncherModel.Callbacks;
+import com.android.launcher3.model.BgDataModel.Callbacks;
 
 import java.lang.ref.WeakReference;
 
diff --git a/go/src/com/android/launcher3/shortcuts/DeepShortcutManager.java b/go/src/com/android/launcher3/shortcuts/DeepShortcutManager.java
index ee113df..42b1194 100644
--- a/go/src/com/android/launcher3/shortcuts/DeepShortcutManager.java
+++ b/go/src/com/android/launcher3/shortcuts/DeepShortcutManager.java
@@ -27,34 +27,23 @@
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.notification.NotificationKeyData;
 
-import java.util.Collections;
+import java.util.ArrayList;
 import java.util.List;
 
 /**
  * Performs operations related to deep shortcuts, such as querying for them, pinning them, etc.
  */
 public class DeepShortcutManager {
-    private static DeepShortcutManager sInstance;
-    private static final Object sInstanceLock = new Object();
+
+    private static final DeepShortcutManager sInstance = new DeepShortcutManager();
 
     public static DeepShortcutManager getInstance(Context context) {
-        synchronized (sInstanceLock) {
-            if (sInstance == null) {
-                sInstance = new DeepShortcutManager(context.getApplicationContext());
-            }
-            return sInstance;
-        }
+        return sInstance;
     }
 
-    private DeepShortcutManager(Context context) {
-    }
+    private final QueryResult mFailure = new QueryResult();
 
-    public boolean wasLastCallSuccess() {
-        return false;
-    }
-
-    public void onShortcutsChanged(List<ShortcutInfo> shortcuts) {
-    }
+    private DeepShortcutManager() { }
 
     /**
      * Queries for the shortcuts with the package name and provided ids.
@@ -62,18 +51,18 @@
      * This method is intended to get the full details for shortcuts when they are added or updated,
      * because we only get "key" fields in onShortcutsChanged().
      */
-    public List<ShortcutInfo> queryForFullDetails(String packageName,
+    public QueryResult queryForFullDetails(String packageName,
             List<String> shortcutIds, UserHandle user) {
-        return Collections.emptyList();
+        return mFailure;
     }
 
     /**
      * Gets all the manifest and dynamic shortcuts associated with the given package and user,
      * to be displayed in the shortcuts container on long press.
      */
-    public List<ShortcutInfo> queryForShortcutsContainer(ComponentName activity,
+    public QueryResult queryForShortcutsContainer(ComponentName activity,
             UserHandle user) {
-        return Collections.emptyList();
+        return mFailure;
     }
 
     /**
@@ -103,20 +92,28 @@
      *
      * If packageName is null, returns all pinned shortcuts regardless of package.
      */
-    public List<ShortcutInfo> queryForPinnedShortcuts(String packageName, UserHandle user) {
-        return Collections.emptyList();
+    public QueryResult queryForPinnedShortcuts(String packageName, UserHandle user) {
+        return mFailure;
     }
 
-    public List<ShortcutInfo> queryForPinnedShortcuts(String packageName,
+    public QueryResult queryForPinnedShortcuts(String packageName,
             List<String> shortcutIds, UserHandle user) {
-        return Collections.emptyList();
+        return mFailure;
     }
 
-    public List<ShortcutInfo> queryForAllShortcuts(UserHandle user) {
-        return Collections.emptyList();
+    public QueryResult queryForAllShortcuts(UserHandle user) {
+        return mFailure;
     }
 
     public boolean hasHostPermission() {
         return false;
     }
+
+
+    public static class QueryResult extends ArrayList<ShortcutInfo> {
+
+        public boolean wasSuccess() {
+            return true;
+        }
+    }
 }
diff --git a/protos/launcher_log.proto b/protos/launcher_log.proto
index 49fd436..055ade5 100644
--- a/protos/launcher_log.proto
+++ b/protos/launcher_log.proto
@@ -118,6 +118,7 @@
   APP_USAGE_SETTINGS = 18;
   BACK_GESTURE = 19;
   UNDO = 20;
+  DISMISS_PREDICTION = 21;
 }
 
 enum TipType {
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/DynamicItemCache.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/DynamicItemCache.java
index 4ecc39c..65e69b6 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/DynamicItemCache.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/DynamicItemCache.java
@@ -17,6 +17,8 @@
 
 import static android.content.pm.PackageManager.MATCH_INSTANT;
 
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ApplicationInfo;
@@ -30,8 +32,12 @@
 import android.util.ArrayMap;
 import android.util.Log;
 
+import androidx.annotation.MainThread;
+import androidx.annotation.Nullable;
+import androidx.annotation.UiThread;
+import androidx.annotation.WorkerThread;
+
 import com.android.launcher3.LauncherAppState;
-import com.android.launcher3.LauncherModel;
 import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.icons.IconCache;
 import com.android.launcher3.icons.LauncherIcons;
@@ -45,11 +51,6 @@
 import java.util.List;
 import java.util.Map;
 
-import androidx.annotation.MainThread;
-import androidx.annotation.Nullable;
-import androidx.annotation.UiThread;
-import androidx.annotation.WorkerThread;
-
 /**
  * Utility class which loads and caches predicted items like instant apps and shortcuts, before
  * they can be displayed on the UI
@@ -77,7 +78,7 @@
 
     public DynamicItemCache(Context context, Runnable onUpdateCallback) {
         mContext = context;
-        mWorker = new Handler(LauncherModel.getWorkerLooper(), this::handleWorkerMessage);
+        mWorker = new Handler(MODEL_EXECUTOR.getLooper(), this::handleWorkerMessage);
         mUiHandler = new Handler(Looper.getMainLooper(), this::handleUiMessage);
         mInstantAppResolver = InstantAppResolver.newInstance(context);
         mOnUpdateCallback = onUpdateCallback;
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionAppTracker.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionAppTracker.java
index 24fc61b..a12917f 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionAppTracker.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionAppTracker.java
@@ -16,6 +16,7 @@
 package com.android.launcher3.appprediction;
 
 import static com.android.launcher3.InvariantDeviceProfile.CHANGE_FLAG_GRID;
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
 
 import android.annotation.TargetApi;
 import android.app.prediction.AppPredictionContext;
@@ -34,13 +35,12 @@
 import android.util.Log;
 
 import androidx.annotation.Nullable;
+import androidx.annotation.UiThread;
+import androidx.annotation.WorkerThread;
+
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.appprediction.PredictionUiStateManager.Client;
 import com.android.launcher3.model.AppLaunchTracker;
-import com.android.launcher3.util.UiThreadHelper;
-
-import androidx.annotation.UiThread;
-import androidx.annotation.WorkerThread;
 
 /**
  * Subclass of app tracker which publishes the data to the prediction engine and gets back results.
@@ -65,7 +65,7 @@
 
     public PredictionAppTracker(Context context) {
         mContext = context;
-        mMessageHandler = new Handler(UiThreadHelper.getBackgroundLooper(), this::handleMessage);
+        mMessageHandler = new Handler(UI_HELPER_EXECUTOR.getLooper(), this::handleMessage);
         InvariantDeviceProfile.INSTANCE.get(mContext).addOnChangeListener(this::onIdpChanged);
 
         mMessageHandler.sendEmptyMessage(MSG_INIT);
@@ -174,10 +174,11 @@
     public void onStartShortcut(String packageName, String shortcutId, UserHandle user,
             String container) {
         // TODO: Use the full shortcut info
-        AppTarget target = new AppTarget
-                .Builder(new AppTargetId("shortcut:" + shortcutId), packageName, user)
-                    .setClassName(shortcutId)
-                    .build();
+        AppTarget target = new AppTarget.Builder(
+                new AppTargetId("shortcut:" + shortcutId), packageName, user)
+                .setClassName(shortcutId)
+                .build();
+
         sendLaunch(target, container);
     }
 
@@ -185,19 +186,40 @@
     @UiThread
     public void onStartApp(ComponentName cn, UserHandle user, String container) {
         if (cn != null) {
-            AppTarget target = new AppTarget
-                    .Builder(new AppTargetId("app:" + cn), cn.getPackageName(), user)
-                        .setClassName(cn.getClassName())
-                        .build();
+            AppTarget target = new AppTarget.Builder(
+                    new AppTargetId("app:" + cn), cn.getPackageName(), user)
+                    .setClassName(cn.getClassName())
+                    .build();
             sendLaunch(target, container);
         }
     }
 
+    @Override
     @UiThread
-    private void sendLaunch(AppTarget target, String container) {
-        AppTargetEvent event = new AppTargetEvent.Builder(target, AppTargetEvent.ACTION_LAUNCH)
+    public void onDismissApp(ComponentName cn, UserHandle user, String container) {
+        if (cn == null) return;
+        AppTarget target = new AppTarget.Builder(
+                new AppTargetId("app: " + cn), cn.getPackageName(), user)
+                .setClassName(cn.getClassName())
+                .build();
+        sendDismiss(target, container);
+    }
+
+    @UiThread
+    private void sendEvent(AppTarget target, String container, int eventId) {
+        AppTargetEvent event = new AppTargetEvent.Builder(target, eventId)
                 .setLaunchLocation(container == null ? CONTAINER_DEFAULT : container)
                 .build();
         Message.obtain(mMessageHandler, MSG_LAUNCH, event).sendToTarget();
     }
+
+    @UiThread
+    private void sendLaunch(AppTarget target, String container) {
+        sendEvent(target, container, AppTargetEvent.ACTION_LAUNCH);
+    }
+
+    @UiThread
+    private void sendDismiss(AppTarget target, String container) {
+        sendEvent(target, container, AppTargetEvent.ACTION_DISMISS);
+    }
 }
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionRowView.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionRowView.java
index 0c7ba9c..95f63ce 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionRowView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionRowView.java
@@ -43,6 +43,7 @@
 import com.android.launcher3.ItemInfoWithIcon;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherAppState;
+import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.R;
 import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.allapps.AllAppsStore;
@@ -281,7 +282,7 @@
     }
 
     private List<ItemInfoWithIcon> processPredictedAppComponents(List<ComponentKeyMapper> components) {
-        if (getAppsStore().getApps().isEmpty()) {
+        if (getAppsStore().getApps().length == 0) {
             // Apps have not been bound yet.
             return Collections.emptyList();
         }
@@ -290,7 +291,9 @@
         for (ComponentKeyMapper mapper : components) {
             ItemInfoWithIcon info = mapper.getApp(getAppsStore());
             if (info != null) {
-                predictedApps.add(info);
+                ItemInfoWithIcon predictedApp = info.clone();
+                predictedApp.container = LauncherSettings.Favorites.CONTAINER_PREDICTION;
+                predictedApps.add(predictedApp);
             } else {
                 if (FeatureFlags.IS_DOGFOOD_BUILD) {
                     Log.e(TAG, "Predicted app not found: " + mapper);
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/states/OverviewState.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/states/OverviewState.java
index 151ceb8..93d4de1 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/states/OverviewState.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/states/OverviewState.java
@@ -32,6 +32,7 @@
 import static com.android.launcher3.logging.LoggerUtils.newContainerTarget;
 import static com.android.launcher3.states.RotationHelper.REQUEST_ROTATE;
 
+import android.content.Context;
 import android.graphics.Rect;
 import android.view.View;
 
@@ -159,11 +160,15 @@
     }
 
     public static float getDefaultSwipeHeight(Launcher launcher) {
-        return getDefaultSwipeHeight(launcher.getDeviceProfile());
+        return getDefaultSwipeHeight(launcher, launcher.getDeviceProfile());
     }
 
-    public static float getDefaultSwipeHeight(DeviceProfile dp) {
-        return dp.allAppsCellHeightPx - dp.allAppsIconTextSizePx;
+    public static float getDefaultSwipeHeight(Context context, DeviceProfile dp) {
+        float swipeHeight = dp.allAppsCellHeightPx - dp.allAppsIconTextSizePx;
+        if (SysUINavigationMode.getMode(context) == SysUINavigationMode.Mode.NO_BUTTON) {
+            swipeHeight -= dp.getInsets().bottom;
+        }
+        return swipeHeight;
     }
 
     @Override
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/FlingAndHoldTouchController.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/FlingAndHoldTouchController.java
index ab346c0..4a3ad1d 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/FlingAndHoldTouchController.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/FlingAndHoldTouchController.java
@@ -42,6 +42,7 @@
 import android.animation.AnimatorSet;
 import android.view.HapticFeedbackConstants;
 import android.view.MotionEvent;
+import android.view.View;
 import android.view.ViewConfiguration;
 
 import com.android.launcher3.Launcher;
@@ -179,6 +180,11 @@
         } else {
             super.onDragEnd(velocity, fling);
         }
+
+        View searchView = mLauncher.getAppsView().getSearchView();
+        if (searchView instanceof FeedbackHandler) {
+            ((FeedbackHandler) searchView).resetFeedback();
+        }
         mMotionPauseDetector.clear();
     }
 
@@ -205,4 +211,16 @@
             builder.addFlag(AnimatorSetBuilder.FLAG_DONT_ANIMATE_OVERVIEW);
         }
     }
+
+    /**
+     * Interface for views with feedback animation requiring reset
+     */
+    public interface FeedbackHandler {
+
+        /**
+         * reset searchWidget feedback
+         */
+        void resetFeedback();
+    }
+
 }
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/BaseSwipeUpHandler.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/BaseSwipeUpHandler.java
index d627a7f..3f4dfd2 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/BaseSwipeUpHandler.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/BaseSwipeUpHandler.java
@@ -22,9 +22,9 @@
 import static com.android.launcher3.anim.Interpolators.ACCEL_1_5;
 import static com.android.launcher3.anim.Interpolators.DEACCEL;
 import static com.android.launcher3.config.FeatureFlags.ENABLE_QUICKSTEP_LIVE_TILE;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
 import static com.android.launcher3.views.FloatingIconView.SHAPE_PROGRESS_DURATION;
-import static com.android.quickstep.TouchInteractionService.BACKGROUND_EXECUTOR;
-import static com.android.quickstep.TouchInteractionService.MAIN_THREAD_EXECUTOR;
 import static com.android.quickstep.TouchInteractionService.TOUCH_INTERACTION_LOG;
 
 import android.animation.Animator;
@@ -47,6 +47,8 @@
 import android.view.WindowManager;
 import android.view.animation.Interpolator;
 
+import androidx.annotation.UiThread;
+
 import com.android.launcher3.BaseDraggingActivity;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.InvariantDeviceProfile;
@@ -54,7 +56,6 @@
 import com.android.launcher3.Utilities;
 import com.android.launcher3.anim.AnimationSuccessListener;
 import com.android.launcher3.anim.AnimatorPlaybackController;
-import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.graphics.RotationMode;
 import com.android.launcher3.views.FloatingIconView;
 import com.android.quickstep.ActivityControlHelper.ActivityInitListener;
@@ -75,8 +76,6 @@
 
 import java.util.function.Consumer;
 
-import androidx.annotation.UiThread;
-
 /**
  * Base class for swipe up handler with some utility methods
  */
@@ -126,7 +125,7 @@
 
     protected Runnable mGestureEndCallback;
 
-    protected final Handler mMainThreadHandler = MAIN_THREAD_EXECUTOR.getHandler();
+    protected final Handler mMainThreadHandler = MAIN_EXECUTOR.getHandler();
     protected MultiStateCallback mStateCallback;
 
     protected boolean mCanceled;
@@ -174,7 +173,7 @@
         if (effect == null) {
             return;
         }
-        BACKGROUND_EXECUTOR.execute(() -> mVibrator.vibrate(effect));
+        UI_HELPER_EXECUTOR.execute(() -> mVibrator.vibrate(effect));
     }
 
     public Consumer<MotionEvent> getRecentsViewDispatcher(RotationMode rotationMode) {
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/OverviewCommandHelper.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/OverviewCommandHelper.java
index 14ff47b..c18b604 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/OverviewCommandHelper.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/OverviewCommandHelper.java
@@ -15,8 +15,8 @@
  */
 package com.android.quickstep;
 
-import static com.android.systemui.shared.system.ActivityManagerWrapper
-        .CLOSE_SYSTEM_WINDOWS_REASON_RECENTS;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+import static com.android.systemui.shared.system.ActivityManagerWrapper.CLOSE_SYSTEM_WINDOWS_REASON_RECENTS;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
@@ -29,7 +29,6 @@
 import android.view.ViewConfiguration;
 
 import com.android.launcher3.BaseDraggingActivity;
-import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.logging.UserEventDispatcher;
 import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.userevent.nano.LauncherLogProto;
@@ -49,7 +48,6 @@
     private final Context mContext;
     private final ActivityManagerWrapper mAM;
     private final RecentsModel mRecentsModel;
-    private final MainThreadExecutor mMainThreadExecutor;
     private final OverviewComponentObserver mOverviewComponentObserver;
 
     private long mLastToggleTime;
@@ -57,7 +55,6 @@
     public OverviewCommandHelper(Context context, OverviewComponentObserver observer) {
         mContext = context;
         mAM = ActivityManagerWrapper.getInstance();
-        mMainThreadExecutor = new MainThreadExecutor();
         mRecentsModel = RecentsModel.INSTANCE.get(mContext);
         mOverviewComponentObserver = observer;
     }
@@ -69,19 +66,19 @@
         }
 
         mAM.closeSystemWindows(CLOSE_SYSTEM_WINDOWS_REASON_RECENTS);
-        mMainThreadExecutor.execute(new RecentsActivityCommand<>());
+        MAIN_EXECUTOR.execute(new RecentsActivityCommand<>());
     }
 
     public void onOverviewShown(boolean triggeredFromAltTab) {
-        mMainThreadExecutor.execute(new ShowRecentsCommand(triggeredFromAltTab));
+        MAIN_EXECUTOR.execute(new ShowRecentsCommand(triggeredFromAltTab));
     }
 
     public void onOverviewHidden() {
-        mMainThreadExecutor.execute(new HideRecentsCommand());
+        MAIN_EXECUTOR.execute(new HideRecentsCommand());
     }
 
     public void onTip(int actionType, int viewType) {
-        mMainThreadExecutor.execute(() ->
+        MAIN_EXECUTOR.execute(() ->
                 UserEventDispatcher.newInstance(mContext).logActionTip(actionType, viewType));
     }
 
@@ -183,7 +180,7 @@
             // Otherwise, start overview.
             mListener = mHelper.createActivityInitListener(this::onActivityReady);
             mListener.registerAndStartActivity(mOverviewComponentObserver.getOverviewIntent(),
-                    this::createWindowAnimation, mContext, mMainThreadExecutor.getHandler(),
+                    this::createWindowAnimation, mContext, MAIN_EXECUTOR.getHandler(),
                     mAnimationProvider.getRecentsLaunchDuration());
         }
 
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/QuickstepTestInformationHandler.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/QuickstepTestInformationHandler.java
index 4eb9df2..72a14b5 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/QuickstepTestInformationHandler.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/QuickstepTestInformationHandler.java
@@ -1,9 +1,10 @@
 package com.android.quickstep;
 
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+
 import android.content.Context;
 import android.os.Bundle;
 
-import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.testing.TestInformationHandler;
 import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.uioverrides.states.OverviewState;
@@ -24,7 +25,7 @@
         switch (method) {
             case TestProtocol.REQUEST_HOME_TO_OVERVIEW_SWIPE_HEIGHT: {
                 final float swipeHeight =
-                        OverviewState.getDefaultSwipeHeight(mDeviceProfile);
+                        OverviewState.getDefaultSwipeHeight(mContext, mDeviceProfile);
                 response.putInt(TestProtocol.TEST_INFO_RESPONSE_FIELD, (int) swipeHeight);
                 return response;
             }
@@ -52,7 +53,7 @@
 
             case TestProtocol.REQUEST_OVERVIEW_LEFT_GESTURE_MARGIN: {
                 try {
-                    final int leftMargin = new MainThreadExecutor().submit(() ->
+                    final int leftMargin = MAIN_EXECUTOR.submit(() ->
                             mLauncher.<RecentsView>getOverviewPanel().getLeftGestureMargin()).get();
                     response.putInt(TestProtocol.TEST_INFO_RESPONSE_FIELD, leftMargin);
                 } catch (ExecutionException e) {
@@ -65,7 +66,7 @@
 
             case TestProtocol.REQUEST_OVERVIEW_RIGHT_GESTURE_MARGIN: {
                 try {
-                    final int rightMargin = new MainThreadExecutor().submit(() ->
+                    final int rightMargin = MAIN_EXECUTOR.submit(() ->
                             mLauncher.<RecentsView>getOverviewPanel().getRightGestureMargin()).
                             get();
                     response.putInt(TestProtocol.TEST_INFO_RESPONSE_FIELD, rightMargin);
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/RecentsActivity.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/RecentsActivity.java
index f08ae4a..9bdc98b 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/RecentsActivity.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/RecentsActivity.java
@@ -136,6 +136,12 @@
     }
 
     @Override
+    public void returnToHomescreen() {
+        super.returnToHomescreen();
+        // TODO(b/137318995) This should go home, but doing so removes freeform windows
+    }
+
+    @Override
     public ActivityOptions getActivityLaunchOptions(final View v) {
         if (!(v instanceof TaskView)) {
             return null;
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/SwipeSharedState.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/SwipeSharedState.java
index c55f656..8783ee3 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/SwipeSharedState.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/SwipeSharedState.java
@@ -15,7 +15,7 @@
  */
 package com.android.quickstep;
 
-import static com.android.quickstep.TouchInteractionService.MAIN_THREAD_EXECUTOR;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 
 import android.util.Log;
 
@@ -25,6 +25,7 @@
 import com.android.quickstep.util.RecentsAnimationListenerSet;
 import com.android.quickstep.util.SwipeAnimationTargetSet;
 import com.android.quickstep.util.SwipeAnimationTargetSet.SwipeAnimationListener;
+
 import java.io.PrintWriter;
 
 /**
@@ -44,6 +45,7 @@
     public boolean goingToLauncher;
     public boolean recentsAnimationFinishInterrupted;
     public int nextRunningTaskId = -1;
+    private int mLogId;
 
     public void setOverviewComponentObserver(OverviewComponentObserver observer) {
         mOverviewComponentObserver = observer;
@@ -77,7 +79,7 @@
             mRecentsAnimationListener.removeListener(this);
             mRecentsAnimationListener.cancelListener();
             if (mLastAnimationRunning && mLastAnimationTarget != null) {
-                Utilities.postAsyncCallback(MAIN_THREAD_EXECUTOR.getHandler(),
+                Utilities.postAsyncCallback(MAIN_EXECUTOR.getHandler(),
                         finishAnimation
                                 ? mLastAnimationTarget::finishAnimation
                                 : mLastAnimationTarget::cancelAnimation);
@@ -155,5 +157,10 @@
         pw.println(prefix + "nextRunningTaskId=" + nextRunningTaskId);
         pw.println(prefix + "lastAnimationCancelled=" + mLastAnimationCancelled);
         pw.println(prefix + "lastAnimationRunning=" + mLastAnimationRunning);
+        pw.println(prefix + "logTraceId=" + mLogId);
+    }
+
+    public void setLogTraceId(int logId) {
+        this.mLogId = logId;
     }
 }
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/TaskSystemShortcut.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/TaskSystemShortcut.java
index fd45923..1af0db0 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/TaskSystemShortcut.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/TaskSystemShortcut.java
@@ -36,8 +36,6 @@
 import com.android.launcher3.BaseDraggingActivity;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.ItemInfo;
-import com.android.launcher3.Launcher;
-import com.android.launcher3.LauncherState;
 import com.android.launcher3.R;
 import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.popup.SystemShortcut;
@@ -267,12 +265,16 @@
 
         @Override
         protected ActivityOptions makeLaunchOptions(Activity activity) {
-            return ActivityOptionsCompat.makeFreeformOptions();
+            ActivityOptions activityOptions = ActivityOptionsCompat.makeFreeformOptions();
+            // Arbitrary bounds only because freeform is in dev mode right now
+            Rect r = new Rect(50, 50, 200, 200);
+            activityOptions.setLaunchBounds(r);
+            return activityOptions;
         }
 
         @Override
         protected boolean onActivityStarted(BaseDraggingActivity activity) {
-            Launcher.getLauncher(activity).getStateManager().goToState(LauncherState.NORMAL);
+            activity.returnToHomescreen();
             return true;
         }
     }
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
index 86ba855..716e8f4 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
@@ -16,13 +16,14 @@
 package com.android.quickstep;
 
 import static android.view.MotionEvent.ACTION_DOWN;
-
 import static com.android.launcher3.config.FeatureFlags.ADAPTIVE_ICON_WINDOW_ANIM;
 import static com.android.launcher3.config.FeatureFlags.APPLY_CONFIG_AT_RUNTIME;
 import static com.android.launcher3.config.FeatureFlags.ENABLE_HINTS_IN_OVERVIEW;
 import static com.android.launcher3.config.FeatureFlags.ENABLE_QUICKSTEP_LIVE_TILE;
 import static com.android.launcher3.config.FeatureFlags.FAKE_LANDSCAPE_UI;
 import static com.android.launcher3.config.FeatureFlags.QUICKSTEP_SPRINGS;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
 import static com.android.systemui.shared.system.QuickStepContract.KEY_EXTRA_INPUT_MONITOR;
 import static com.android.systemui.shared.system.QuickStepContract.KEY_EXTRA_SYSUI_PROXY;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_A11Y_BUTTON_CLICKABLE;
@@ -66,13 +67,10 @@
 import android.view.MotionEvent;
 import android.view.Surface;
 import android.view.WindowManager;
-
 import androidx.annotation.BinderThread;
 import androidx.annotation.UiThread;
 import androidx.annotation.WorkerThread;
-
 import com.android.launcher3.BaseDraggingActivity;
-import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.R;
 import com.android.launcher3.ResourceUtils;
 import com.android.launcher3.Utilities;
@@ -82,8 +80,6 @@
 import com.android.launcher3.model.AppLaunchTracker;
 import com.android.launcher3.provider.RestoreDbTask;
 import com.android.launcher3.testing.TestProtocol;
-import com.android.launcher3.util.LooperExecutor;
-import com.android.launcher3.util.UiThreadHelper;
 import com.android.quickstep.SysUINavigationMode.Mode;
 import com.android.quickstep.SysUINavigationMode.NavigationModeChangeListener;
 import com.android.quickstep.inputconsumers.AccessibilityInputConsumer;
@@ -106,8 +102,8 @@
 import com.android.systemui.shared.system.QuickStepContract.SystemUiStateFlags;
 import com.android.systemui.shared.system.RecentsAnimationListener;
 import com.android.systemui.shared.system.SystemGestureExclusionListenerCompat;
-
 import com.android.systemui.shared.system.TaskInfoCompat;
+
 import java.io.FileDescriptor;
 import java.io.PrintWriter;
 import java.util.Arrays;
@@ -138,9 +134,12 @@
 public class TouchInteractionService extends Service implements
         NavigationModeChangeListener, DisplayListener {
 
-    public static final MainThreadExecutor MAIN_THREAD_EXECUTOR = new MainThreadExecutor();
-    public static final LooperExecutor BACKGROUND_EXECUTOR =
-            new LooperExecutor(UiThreadHelper.getBackgroundLooper());
+    /**
+     * NOTE: This value should be kept same as
+     * ActivityTaskManagerService#INTENT_EXTRA_LOG_TRACE_ID in platform
+     */
+    public static final String INTENT_EXTRA_LOG_TRACE_ID = "INTENT_EXTRA_LOG_TRACE_ID";
+
 
     public static final EventLogArray TOUCH_INTERACTION_LOG =
             new EventLogArray("touch_interaction_log", 40);
@@ -161,9 +160,9 @@
         public void onInitialize(Bundle bundle) {
             mISystemUiProxy = ISystemUiProxy.Stub
                     .asInterface(bundle.getBinder(KEY_EXTRA_SYSUI_PROXY));
-            MAIN_THREAD_EXECUTOR.execute(TouchInteractionService.this::initInputMonitor);
-            MAIN_THREAD_EXECUTOR.execute(TouchInteractionService.this::onSystemUiProxySet);
-            MAIN_THREAD_EXECUTOR.execute(() -> preloadOverview(true /* fromInit */));
+            MAIN_EXECUTOR.execute(TouchInteractionService.this::initInputMonitor);
+            MAIN_EXECUTOR.execute(TouchInteractionService.this::onSystemUiProxySet);
+            MAIN_EXECUTOR.execute(() -> preloadOverview(true /* fromInit */));
             sIsInitialized = true;
         }
 
@@ -198,7 +197,7 @@
         @Override
         public void onAssistantVisibilityChanged(float visibility) {
             mLastAssistantVisibility = visibility;
-            MAIN_THREAD_EXECUTOR.execute(
+            MAIN_EXECUTOR.execute(
                     TouchInteractionService.this::onAssistantVisibilityChanged);
         }
 
@@ -214,13 +213,13 @@
                     isButton, gestureSwipeLeft, activityControl.getContainerType());
 
             if (completed && !isButton && shouldNotifyBackGesture()) {
-                BACKGROUND_EXECUTOR.execute(TouchInteractionService.this::tryNotifyBackGesture);
+                UI_HELPER_EXECUTOR.execute(TouchInteractionService.this::tryNotifyBackGesture);
             }
         }
 
         public void onSystemUiStateChanged(int stateFlags) {
             mSystemUiStateFlags = stateFlags;
-            MAIN_THREAD_EXECUTOR.execute(TouchInteractionService.this::onSystemUiFlagsChanged);
+            MAIN_EXECUTOR.execute(TouchInteractionService.this::onSystemUiFlagsChanged);
         }
 
         /** Deprecated methods **/
@@ -244,6 +243,7 @@
     private static boolean sConnected = false;
     private static boolean sIsInitialized = false;
     private static final SwipeSharedState sSwipeSharedState = new SwipeSharedState();
+    private int mLogId;
 
     public static boolean isConnected() {
         return sConnected;
@@ -439,7 +439,7 @@
         if (mMode.hasGestures != newMode.hasGestures) {
             if (newMode.hasGestures) {
                 getSystemService(DisplayManager.class).registerDisplayListener(
-                        this, MAIN_THREAD_EXECUTOR.getHandler());
+                        this, MAIN_EXECUTOR.getHandler());
             } else {
                 getSystemService(DisplayManager.class).unregisterDisplayListener(this);
             }
@@ -554,9 +554,12 @@
             Log.e(TAG, "Unknown event " + ev);
             return;
         }
+
         MotionEvent event = (MotionEvent) ev;
-        TOUCH_INTERACTION_LOG.addLog("onMotionEvent", event.getActionMasked());
         if (event.getAction() == ACTION_DOWN) {
+            mLogId = TOUCH_INTERACTION_LOG.generateAndSetLogId();
+            sSwipeSharedState.setLogTraceId(mLogId);
+
             if (mSwipeTouchRegion.contains(event.getX(), event.getY())) {
                 boolean useSharedState = mConsumer.useSharedSwipeState();
                 mConsumer.onConsumerAboutToBeSwitched();
@@ -576,6 +579,8 @@
                 mUncheckedConsumer = InputConsumer.NO_OP;
             }
         }
+
+        TOUCH_INTERACTION_LOG.addLog("onMotionEvent", event.getActionMasked());
         mUncheckedConsumer.onMotionEvent(event);
     }
 
@@ -661,7 +666,7 @@
                 final ComponentName homeComponent =
                     mOverviewComponentObserver.getHomeIntent().getComponent();
                 forceOverviewInputConsumer =
-                    runningTaskInfo.baseIntent.getComponent().equals(homeComponent);
+                    runningTaskInfo.baseIntent.getComponent(). equals(homeComponent);
             }
         }
 
@@ -718,13 +723,13 @@
         return new OtherActivityInputConsumer(this, runningTaskInfo,
                 shouldDefer, mOverviewCallbacks, this::onConsumerInactive,
                 sSwipeSharedState, mInputMonitorCompat, mSwipeTouchRegion,
-                disableHorizontalSwipe(event), factory);
+                disableHorizontalSwipe(event), factory, mLogId);
     }
 
     private InputConsumer createDeviceLockedInputConsumer(RunningTaskInfo taskInfo) {
         if (mMode == Mode.NO_BUTTON && taskInfo != null) {
             return new DeviceLockedInputConsumer(this, sSwipeSharedState, mInputMonitorCompat,
-                    mSwipeTouchRegion, taskInfo.taskId);
+                    mSwipeTouchRegion, taskInfo.taskId, mLogId);
         } else {
             return mResetGestureInputConsumer;
         }
@@ -788,7 +793,8 @@
         }
 
         // Pass null animation handler to indicate this start is preload.
-        startRecentsActivityAsync(mOverviewComponentObserver.getOverviewIntentIgnoreSysUiState(), null);
+        startRecentsActivityAsync(mOverviewComponentObserver.getOverviewIntentIgnoreSysUiState(),
+                null);
     }
 
     @Override
@@ -897,7 +903,7 @@
     }
 
     public static void startRecentsActivityAsync(Intent intent, RecentsAnimationListener listener) {
-        BACKGROUND_EXECUTOR.execute(() -> ActivityManagerWrapper.getInstance()
+        UI_HELPER_EXECUTOR.execute(() -> ActivityManagerWrapper.getInstance()
                 .startRecentsActivity(intent, null, listener, null, null));
     }
 }
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/WindowTransformSwipeHandler.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/WindowTransformSwipeHandler.java
index 0d29e5d..a3bd348 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/WindowTransformSwipeHandler.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/WindowTransformSwipeHandler.java
@@ -217,6 +217,7 @@
 
     private AnimationFactory mAnimationFactory = (t) -> { };
     private LiveTileOverlay mLiveTileOverlay = new LiveTileOverlay();
+    private boolean mLiveTileOverlayAttached = false;
 
     private boolean mWasLauncherAlreadyVisible;
 
@@ -323,8 +324,7 @@
 
         mRecentsView = activity.getOverviewPanel();
         linkRecentsViewScroll();
-        mRecentsView.setLiveTileOverlay(mLiveTileOverlay);
-        mActivity.getRootView().getOverlay().add(mLiveTileOverlay);
+        addLiveTileOverlay();
 
         mStateCallback.setState(STATE_LAUNCHER_PRESENT);
         if (alreadyOnHome) {
@@ -972,7 +972,7 @@
             @Override
             public void onAnimationStart(Animator animation) {
                 if (mActivity != null) {
-                    mActivity.getRootView().getOverlay().remove(mLiveTileOverlay);
+                    removeLiveTileOverlay();
                 }
             }
 
@@ -1071,7 +1071,7 @@
         mRecentsView.onGestureAnimationEnd();
 
         mActivity.getRootView().setOnApplyWindowInsetsListener(null);
-        mActivity.getRootView().getOverlay().remove(mLiveTileOverlay);
+        removeLiveTileOverlay();
     }
 
     private void endLauncherTransitionController() {
@@ -1201,6 +1201,22 @@
         updateFinalShift();
     }
 
+    private synchronized void addLiveTileOverlay() {
+        if (!mLiveTileOverlayAttached) {
+            mActivity.getRootView().getOverlay().add(mLiveTileOverlay);
+            mRecentsView.setLiveTileOverlay(mLiveTileOverlay);
+            mLiveTileOverlayAttached = true;
+        }
+    }
+
+    private synchronized void removeLiveTileOverlay() {
+        if (mLiveTileOverlayAttached) {
+            mActivity.getRootView().getOverlay().remove(mLiveTileOverlay);
+            mRecentsView.setLiveTileOverlay(null);
+            mLiveTileOverlayAttached = false;
+        }
+    }
+
     public static float getHiddenTargetAlpha(RemoteAnimationTargetCompat app, float expectedAlpha) {
         if (!isNotInRecents(app)) {
             return 0;
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/DeviceLockedInputConsumer.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/DeviceLockedInputConsumer.java
index 3d763ab..0743925 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/DeviceLockedInputConsumer.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/DeviceLockedInputConsumer.java
@@ -18,12 +18,12 @@
 import static android.view.MotionEvent.ACTION_CANCEL;
 import static android.view.MotionEvent.ACTION_POINTER_DOWN;
 import static android.view.MotionEvent.ACTION_UP;
-
 import static com.android.launcher3.Utilities.squaredHypot;
 import static com.android.launcher3.Utilities.squaredTouchSlop;
 import static com.android.quickstep.MultiStateCallback.DEBUG_STATES;
-import static com.android.quickstep.WindowTransformSwipeHandler.MIN_PROGRESS_FOR_OVERVIEW;
+import static com.android.quickstep.TouchInteractionService.INTENT_EXTRA_LOG_TRACE_ID;
 import static com.android.quickstep.TouchInteractionService.startRecentsActivityAsync;
+import static com.android.quickstep.WindowTransformSwipeHandler.MIN_PROGRESS_FOR_OVERVIEW;
 
 import android.content.ComponentName;
 import android.content.Context;
@@ -36,7 +36,6 @@
 import android.view.VelocityTracker;
 import android.view.ViewConfiguration;
 import android.view.WindowManager;
-
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.quickstep.LockScreenRecentsActivity;
@@ -76,6 +75,7 @@
 
     private final PointF mTouchDown = new PointF();
     private final ClipAnimationHelper mClipAnimationHelper;
+    private int mLogId;
     private final ClipAnimationHelper.TransformParams mTransformParams;
     private final Point mDisplaySize;
     private final MultiStateCallback mStateCallback;
@@ -90,11 +90,13 @@
     private SwipeAnimationTargetSet mTargetSet;
 
     public DeviceLockedInputConsumer(Context context, SwipeSharedState swipeSharedState,
-            InputMonitorCompat inputMonitorCompat, RectF swipeTouchRegion, int runningTaskId) {
+            InputMonitorCompat inputMonitorCompat, RectF swipeTouchRegion, int runningTaskId,
+            int logId) {
         mContext = context;
         mTouchSlopSquared = squaredTouchSlop(context);
         mSwipeSharedState = swipeSharedState;
         mClipAnimationHelper = new ClipAnimationHelper(context);
+        mLogId = logId;
         mTransformParams = new ClipAnimationHelper.TransformParams();
         mInputMonitorCompat = inputMonitorCompat;
         mSwipeTouchRegion = swipeTouchRegion;
@@ -205,7 +207,8 @@
         Intent intent = new Intent(Intent.ACTION_MAIN)
                 .addCategory(Intent.CATEGORY_DEFAULT)
                 .setComponent(new ComponentName(mContext, LockScreenRecentsActivity.class))
-                .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
+                .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK)
+                .putExtra(INTENT_EXTRA_LOG_TRACE_ID, mLogId);
 
         mInputMonitorCompat.pilferPointers();
         startRecentsActivityAsync(intent, newListenerSet);
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/FallbackNoButtonInputConsumer.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/FallbackNoButtonInputConsumer.java
index 6ec1da0..e0ff8af 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/FallbackNoButtonInputConsumer.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/FallbackNoButtonInputConsumer.java
@@ -50,7 +50,6 @@
 import com.android.quickstep.util.ObjectWrapper;
 import com.android.quickstep.util.RectFSpringAnim;
 import com.android.quickstep.util.SwipeAnimationTargetSet;
-import com.android.quickstep.views.RecentsView;
 import com.android.quickstep.views.TaskView;
 import com.android.systemui.shared.recents.model.ThumbnailData;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OtherActivityInputConsumer.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OtherActivityInputConsumer.java
index 86766d9..e41880d 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OtherActivityInputConsumer.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OtherActivityInputConsumer.java
@@ -22,11 +22,11 @@
 import static android.view.MotionEvent.ACTION_POINTER_UP;
 import static android.view.MotionEvent.ACTION_UP;
 import static android.view.MotionEvent.INVALID_POINTER_ID;
-
 import static com.android.launcher3.Utilities.EDGE_NAV_BAR;
 import static com.android.launcher3.Utilities.squaredHypot;
 import static com.android.launcher3.util.RaceConditionTracker.ENTER;
 import static com.android.launcher3.util.RaceConditionTracker.EXIT;
+import static com.android.quickstep.TouchInteractionService.INTENT_EXTRA_LOG_TRACE_ID;
 import static com.android.quickstep.TouchInteractionService.TOUCH_INTERACTION_LOG;
 import static com.android.quickstep.TouchInteractionService.startRecentsActivityAsync;
 import static com.android.systemui.shared.system.ActivityManagerWrapper.CLOSE_SYSTEM_WINDOWS_REASON_RECENTS;
@@ -35,6 +35,7 @@
 import android.app.ActivityManager.RunningTaskInfo;
 import android.content.Context;
 import android.content.ContextWrapper;
+import android.content.Intent;
 import android.graphics.PointF;
 import android.graphics.RectF;
 import android.os.Build;
@@ -43,12 +44,13 @@
 import android.view.MotionEvent;
 import android.view.VelocityTracker;
 import android.view.ViewConfiguration;
-
+import androidx.annotation.UiThread;
 import com.android.launcher3.R;
 import com.android.launcher3.util.Preconditions;
 import com.android.launcher3.util.RaceConditionTracker;
 import com.android.launcher3.util.TraceHelper;
 import com.android.quickstep.BaseSwipeUpHandler;
+import com.android.quickstep.BaseSwipeUpHandler.Factory;
 import com.android.quickstep.OverviewCallbacks;
 import com.android.quickstep.SwipeSharedState;
 import com.android.quickstep.SysUINavigationMode;
@@ -59,11 +61,8 @@
 import com.android.quickstep.util.RecentsAnimationListenerSet;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
 import com.android.systemui.shared.system.InputMonitorCompat;
-
 import java.util.function.Consumer;
 
-import androidx.annotation.UiThread;
-
 /**
  * Input consumer for handling events originating from an activity other than Launcher
  */
@@ -119,14 +118,16 @@
         ActivityManagerWrapper.getInstance().cancelRecentsAnimation(
                 true /* restoreHomeStackPosition */);
     };
+    private int mLogId;
 
     public OtherActivityInputConsumer(Context base, RunningTaskInfo runningTaskInfo,
             boolean isDeferredDownTarget, OverviewCallbacks overviewCallbacks,
             Consumer<OtherActivityInputConsumer> onCompleteCallback,
             SwipeSharedState swipeSharedState, InputMonitorCompat inputMonitorCompat,
             RectF swipeTouchRegion, boolean disableHorizontalSwipe,
-            BaseSwipeUpHandler.Factory handlerFactory) {
+            Factory handlerFactory, int logId) {
         super(base);
+        mLogId = logId;
 
         mMainThreadHandler = new Handler(Looper.getMainLooper());
         mRunningTask = runningTaskInfo;
@@ -341,7 +342,9 @@
             RecentsAnimationListenerSet newListenerSet =
                     mSwipeSharedState.newRecentsAnimationListenerSet();
             newListenerSet.addListener(handler);
-            startRecentsActivityAsync(handler.getLaunchIntent(), newListenerSet);
+            Intent intent = handler.getLaunchIntent();
+            intent.putExtra(INTENT_EXTRA_LOG_TRACE_ID, mLogId);
+            startRecentsActivityAsync(intent, newListenerSet);
         }
     }
 
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/RecentsAnimationListenerSet.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/RecentsAnimationListenerSet.java
index 14083dd..b1999d7 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/RecentsAnimationListenerSet.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/RecentsAnimationListenerSet.java
@@ -15,11 +15,13 @@
  */
 package com.android.quickstep.util;
 
-import static com.android.quickstep.TouchInteractionService.MAIN_THREAD_EXECUTOR;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 
 import android.graphics.Rect;
 import android.util.ArraySet;
 
+import androidx.annotation.UiThread;
+
 import com.android.launcher3.Utilities;
 import com.android.launcher3.util.Preconditions;
 import com.android.quickstep.util.SwipeAnimationTargetSet.SwipeAnimationListener;
@@ -31,8 +33,6 @@
 import java.util.Set;
 import java.util.function.Consumer;
 
-import androidx.annotation.UiThread;
-
 /**
  * Wrapper around {@link RecentsAnimationListener} which delegates callbacks to multiple listeners
  * on the main thread
@@ -82,7 +82,7 @@
         if (mCancelled) {
             targetSet.cancelAnimation();
         } else {
-            Utilities.postAsyncCallback(MAIN_THREAD_EXECUTOR.getHandler(), () -> {
+            Utilities.postAsyncCallback(MAIN_EXECUTOR.getHandler(), () -> {
                 for (SwipeAnimationListener listener : getListeners()) {
                     listener.onRecentsAnimationStart(targetSet);
                 }
@@ -92,14 +92,14 @@
 
     @Override
     public final void onAnimationCanceled(ThumbnailData thumbnailData) {
-        Utilities.postAsyncCallback(MAIN_THREAD_EXECUTOR.getHandler(), () -> {
+        Utilities.postAsyncCallback(MAIN_EXECUTOR.getHandler(), () -> {
             for (SwipeAnimationListener listener : getListeners()) {
                 listener.onRecentsAnimationCanceled();
             }
         });
         // TODO: handle the transition better instead of simply using a transition delay.
         if (thumbnailData != null) {
-            MAIN_THREAD_EXECUTOR.getHandler().postDelayed(() -> mController.cleanupScreenshot(),
+            MAIN_EXECUTOR.getHandler().postDelayed(() -> mController.cleanupScreenshot(),
                     TRANSITION_DELAY);
         }
     }
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/SwipeAnimationTargetSet.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/SwipeAnimationTargetSet.java
index 381c27a..3619d3a 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/SwipeAnimationTargetSet.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/SwipeAnimationTargetSet.java
@@ -15,8 +15,8 @@
  */
 package com.android.quickstep.util;
 
-import static com.android.quickstep.TouchInteractionService.BACKGROUND_EXECUTOR;
-import static com.android.quickstep.TouchInteractionService.MAIN_THREAD_EXECUTOR;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
 import static com.android.systemui.shared.system.RemoteAnimationTargetCompat.MODE_CLOSING;
 
 import android.graphics.Rect;
@@ -68,25 +68,25 @@
 
     public void finishController(boolean toRecents, Runnable callback, boolean sendUserLeaveHint) {
         mOnFinishListener.accept(this);
-        BACKGROUND_EXECUTOR.execute(() -> {
+        UI_HELPER_EXECUTOR.execute(() -> {
             controller.setInputConsumerEnabled(false);
             controller.finish(toRecents, sendUserLeaveHint);
 
             if (callback != null) {
-                MAIN_THREAD_EXECUTOR.execute(callback);
+                MAIN_EXECUTOR.execute(callback);
             }
         });
     }
 
     public void enableInputConsumer() {
-        BACKGROUND_EXECUTOR.submit(() -> {
+        UI_HELPER_EXECUTOR.submit(() -> {
             controller.hideCurrentInputMethod();
             controller.setInputConsumerEnabled(true);
         });
     }
 
     public void setWindowThresholdCrossed(boolean thresholdCrossed) {
-        BACKGROUND_EXECUTOR.execute(() -> {
+        UI_HELPER_EXECUTOR.execute(() -> {
             controller.setAnimationTargetsBehindSystemBars(!thresholdCrossed);
             if (mShouldMinimizeSplitScreen && thresholdCrossed) {
                 // NOTE: As a workaround for conflicting animations (Launcher animating the task
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/DigitalWellBeingToast.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/DigitalWellBeingToast.java
index 7fac813..b06d4bc 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/DigitalWellBeingToast.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/DigitalWellBeingToast.java
@@ -19,6 +19,7 @@
 import static android.provider.Settings.ACTION_APP_USAGE_SETTINGS;
 
 import static com.android.launcher3.Utilities.prefixTextWithIcon;
+import static com.android.launcher3.util.Executors.THREAD_POOL_EXECUTOR;
 
 import android.annotation.TargetApi;
 import android.app.ActivityOptions;
@@ -41,7 +42,6 @@
 import com.android.launcher3.BaseActivity;
 import com.android.launcher3.BaseDraggingActivity;
 import com.android.launcher3.R;
-import com.android.launcher3.Utilities;
 import com.android.launcher3.userevent.nano.LauncherLogProto;
 import com.android.systemui.shared.recents.model.Task;
 
@@ -117,7 +117,7 @@
             return;
         }
 
-        Utilities.THREAD_POOL_EXECUTOR.execute(() -> {
+        THREAD_POOL_EXECUTOR.execute(() -> {
             final AppUsageLimit usageLimit = mLauncherApps.getAppUsageLimit(
                     task.getTopComponent().getPackageName(),
                     UserHandle.of(task.key.userId));
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
index 1bf77f5..9464bd1 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
@@ -35,9 +35,9 @@
 import static com.android.launcher3.uioverrides.touchcontrollers.TaskViewTouchController.SUCCESS_TRANSITION_PROGRESS;
 import static com.android.launcher3.userevent.nano.LauncherLogProto.Action.Touch.TAP;
 import static com.android.launcher3.userevent.nano.LauncherLogProto.ControlType.CLEAR_ALL_BUTTON;
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
 import static com.android.launcher3.util.SystemUiController.UI_STATE_OVERVIEW;
 import static com.android.quickstep.TaskUtils.checkCurrentOrManagedUserId;
-import static com.android.quickstep.TouchInteractionService.BACKGROUND_EXECUTOR;
 
 import android.animation.Animator;
 import android.animation.AnimatorSet;
@@ -228,7 +228,7 @@
                 return;
             }
 
-            BACKGROUND_EXECUTOR.execute(() -> {
+            UI_HELPER_EXECUTOR.execute(() -> {
                 TaskView taskView = getTaskView(taskId);
                 if (taskView == null) {
                     return;
@@ -825,7 +825,7 @@
      */
     public void onSwipeUpAnimationSuccess() {
         if (getRunningTaskView() != null) {
-            float startProgress = ENABLE_QUICKSTEP_LIVE_TILE.get()
+            float startProgress = ENABLE_QUICKSTEP_LIVE_TILE.get() && mLiveTileOverlay != null
                     ? mLiveTileOverlay.cancelIconAnimation()
                     : 0f;
             animateUpRunningTaskIconScale(startProgress);
diff --git a/quickstep/src/com/android/launcher3/uioverrides/plugins/PluginInitializerImpl.java b/quickstep/src/com/android/launcher3/uioverrides/plugins/PluginInitializerImpl.java
index 910fa0d..7beb9db 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/plugins/PluginInitializerImpl.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/plugins/PluginInitializerImpl.java
@@ -14,16 +14,17 @@
 
 package com.android.launcher3.uioverrides.plugins;
 
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+
 import android.content.Context;
 import android.os.Looper;
 
-import com.android.launcher3.LauncherModel;
 import com.android.systemui.shared.plugins.PluginInitializer;
 
 public class PluginInitializerImpl implements PluginInitializer {
     @Override
     public Looper getBgLooper() {
-        return LauncherModel.getWorkerLooper();
+        return MODEL_EXECUTOR.getLooper();
     }
 
     @Override
diff --git a/quickstep/src/com/android/quickstep/OverviewInteractionState.java b/quickstep/src/com/android/quickstep/OverviewInteractionState.java
index 78b48d7..858c3b6 100644
--- a/quickstep/src/com/android/quickstep/OverviewInteractionState.java
+++ b/quickstep/src/com/android/quickstep/OverviewInteractionState.java
@@ -15,20 +15,21 @@
  */
 package com.android.quickstep;
 
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
+
 import android.content.Context;
 import android.os.Handler;
 import android.os.Message;
 import android.os.RemoteException;
 import android.util.Log;
 
+import androidx.annotation.WorkerThread;
+
 import com.android.launcher3.Utilities;
 import com.android.launcher3.allapps.DiscoveryBounce;
 import com.android.launcher3.util.MainThreadInitializedObject;
-import com.android.launcher3.util.UiThreadHelper;
 import com.android.systemui.shared.recents.ISystemUiProxy;
 
-import androidx.annotation.WorkerThread;
-
 /**
  * Sets alpha for the back button
  */
@@ -62,7 +63,7 @@
         // because of its high send frequency and data may be very different than the previous value
         // For example, send back alpha on uihandler to avoid flickering when setting its visibility
         mUiHandler = new Handler(this::handleUiMessage);
-        mBgHandler = new Handler(UiThreadHelper.getBackgroundLooper(), this::handleBgMessage);
+        mBgHandler = new Handler(UI_HELPER_EXECUTOR.getLooper(), this::handleBgMessage);
 
         onNavigationModeChanged(SysUINavigationMode.INSTANCE.get(context)
                 .addModeChangeListener(this::onNavigationModeChanged));
diff --git a/quickstep/src/com/android/quickstep/RecentTasksList.java b/quickstep/src/com/android/quickstep/RecentTasksList.java
index e41dba9..10f9feb 100644
--- a/quickstep/src/com/android/quickstep/RecentTasksList.java
+++ b/quickstep/src/com/android/quickstep/RecentTasksList.java
@@ -16,19 +16,22 @@
 
 package com.android.quickstep;
 
-import static com.android.quickstep.TouchInteractionService.BACKGROUND_EXECUTOR;
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
 
 import android.annotation.TargetApi;
 import android.app.ActivityManager;
-import android.content.Context;
 import android.os.Build;
 import android.os.Process;
 import android.util.SparseBooleanArray;
-import com.android.launcher3.MainThreadExecutor;
+
+import androidx.annotation.VisibleForTesting;
+
+import com.android.launcher3.util.LooperExecutor;
 import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
 import com.android.systemui.shared.system.KeyguardManagerCompat;
 import com.android.systemui.shared.system.TaskStackChangeListener;
+
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -41,7 +44,8 @@
 public class RecentTasksList extends TaskStackChangeListener {
 
     private final KeyguardManagerCompat mKeyguardManager;
-    private final MainThreadExecutor mMainThreadExecutor;
+    private final LooperExecutor mMainThreadExecutor;
+    private final ActivityManagerWrapper mActivityManagerWrapper;
 
     // The list change id, increments as the task list changes in the system
     private int mChangeId;
@@ -52,11 +56,13 @@
 
     ArrayList<Task> mTasks = new ArrayList<>();
 
-    public RecentTasksList(Context context) {
-        mMainThreadExecutor = new MainThreadExecutor();
-        mKeyguardManager = new KeyguardManagerCompat(context);
+    public RecentTasksList(LooperExecutor mainThreadExecutor,
+            KeyguardManagerCompat keyguardManager, ActivityManagerWrapper activityManagerWrapper) {
+        mMainThreadExecutor = mainThreadExecutor;
+        mKeyguardManager = keyguardManager;
         mChangeId = 1;
-        ActivityManagerWrapper.getInstance().registerTaskStackListener(this);
+        mActivityManagerWrapper = activityManagerWrapper;
+        mActivityManagerWrapper.registerTaskStackListener(this);
     }
 
     /**
@@ -64,7 +70,7 @@
      */
     public void getTaskKeys(int numTasks, Consumer<ArrayList<Task>> callback) {
         // Kick off task loading in the background
-        BACKGROUND_EXECUTOR.execute(() -> {
+        UI_HELPER_EXECUTOR.execute(() -> {
             ArrayList<Task> tasks = loadTasksInBackground(numTasks, true /* loadKeysOnly */);
             mMainThreadExecutor.execute(() -> callback.accept(tasks));
         });
@@ -86,12 +92,12 @@
         if (mLastLoadedId == mChangeId && (!mLastLoadHadKeysOnly || loadKeysOnly)) {
             // The list is up to date, send the callback on the next frame,
             // so that requestID can be returned first.
-            mMainThreadExecutor.getHandler().post(resultCallback);
+            mMainThreadExecutor.post(resultCallback);
             return requestLoadId;
         }
 
         // Kick off task loading in the background
-        BACKGROUND_EXECUTOR.execute(() -> {
+        UI_HELPER_EXECUTOR.execute(() -> {
             ArrayList<Task> tasks = loadTasksInBackground(Integer.MAX_VALUE, loadKeysOnly);
 
             mMainThreadExecutor.execute(() -> {
@@ -136,12 +142,13 @@
     /**
      * Loads and creates a list of all the recent tasks.
      */
-    private ArrayList<Task> loadTasksInBackground(int numTasks,
+    @VisibleForTesting
+    ArrayList<Task> loadTasksInBackground(int numTasks,
             boolean loadKeysOnly) {
         int currentUserId = Process.myUserHandle().getIdentifier();
         ArrayList<Task> allTasks = new ArrayList<>();
         List<ActivityManager.RecentTaskInfo> rawTasks =
-                ActivityManagerWrapper.getInstance().getRecentTasks(numTasks, currentUserId);
+                mActivityManagerWrapper.getRecentTasks(numTasks, currentUserId);
         // The raw tasks are given in most-recent to least-recent order, we need to reverse it
         Collections.reverse(rawTasks);
 
diff --git a/quickstep/src/com/android/quickstep/RecentsActivityTracker.java b/quickstep/src/com/android/quickstep/RecentsActivityTracker.java
index f9d2f11..4d1d9ef 100644
--- a/quickstep/src/com/android/quickstep/RecentsActivityTracker.java
+++ b/quickstep/src/com/android/quickstep/RecentsActivityTracker.java
@@ -15,6 +15,8 @@
  */
 package com.android.quickstep;
 
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.Intent;
@@ -22,7 +24,6 @@
 import android.os.Bundle;
 import android.os.Handler;
 
-import com.android.launcher3.MainThreadExecutor;
 import com.android.quickstep.ActivityControlHelper.ActivityInitListener;
 import com.android.quickstep.util.RemoteAnimationProvider;
 
@@ -92,14 +93,10 @@
     private static class Scheduler implements Runnable {
 
         private WeakReference<RecentsActivityTracker> mPendingTracker = new WeakReference<>(null);
-        private MainThreadExecutor mMainThreadExecutor;
 
         public synchronized void schedule(RecentsActivityTracker tracker) {
             mPendingTracker = new WeakReference<>(tracker);
-            if (mMainThreadExecutor == null) {
-                mMainThreadExecutor = new MainThreadExecutor();
-            }
-            mMainThreadExecutor.execute(this);
+            MAIN_EXECUTOR.execute(this);
         }
 
         @Override
diff --git a/quickstep/src/com/android/quickstep/RecentsModel.java b/quickstep/src/com/android/quickstep/RecentsModel.java
index dfab434..2e59ed5 100644
--- a/quickstep/src/com/android/quickstep/RecentsModel.java
+++ b/quickstep/src/com/android/quickstep/RecentsModel.java
@@ -15,6 +15,10 @@
  */
 package com.android.quickstep;
 
+import static android.os.Process.THREAD_PRIORITY_BACKGROUND;
+
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+import static com.android.launcher3.util.Executors.createAndStartNewLooper;
 import static com.android.quickstep.TaskUtils.checkCurrentOrManagedUserId;
 
 import android.annotation.TargetApi;
@@ -22,16 +26,20 @@
 import android.content.ComponentCallbacks2;
 import android.content.Context;
 import android.os.Build;
-import android.os.HandlerThread;
+import android.os.Looper;
 import android.os.Process;
 import android.os.RemoteException;
+import android.os.UserHandle;
 import android.util.Log;
 
+import com.android.launcher3.compat.LauncherAppsCompat;
+import com.android.launcher3.compat.LauncherAppsCompat.OnAppsChangedCallbackCompat;
 import com.android.launcher3.util.MainThreadInitializedObject;
 import com.android.systemui.shared.recents.ISystemUiProxy;
 import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.recents.model.ThumbnailData;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
+import com.android.systemui.shared.system.KeyguardManagerCompat;
 import com.android.systemui.shared.system.TaskStackChangeListener;
 
 import java.util.ArrayList;
@@ -61,13 +69,14 @@
 
     private RecentsModel(Context context) {
         mContext = context;
-        HandlerThread loaderThread = new HandlerThread("TaskThumbnailIconCache",
-                Process.THREAD_PRIORITY_BACKGROUND);
-        loaderThread.start();
-        mTaskList = new RecentTasksList(context);
-        mIconCache = new TaskIconCache(context, loaderThread.getLooper());
-        mThumbnailCache = new TaskThumbnailCache(context, loaderThread.getLooper());
+        Looper looper =
+                createAndStartNewLooper("TaskThumbnailIconCache", THREAD_PRIORITY_BACKGROUND);
+        mTaskList = new RecentTasksList(MAIN_EXECUTOR,
+                new KeyguardManagerCompat(context), ActivityManagerWrapper.getInstance());
+        mIconCache = new TaskIconCache(context, looper);
+        mThumbnailCache = new TaskThumbnailCache(context, looper);
         ActivityManagerWrapper.getInstance().registerTaskStackListener(this);
+        setupPackageListener();
     }
 
     public TaskIconCache getIconCache() {
@@ -166,6 +175,7 @@
     public void onTaskRemoved(int taskId) {
         Task.TaskKey dummyKey = new Task.TaskKey(taskId, 0, null, null, 0, 0);
         mThumbnailCache.remove(dummyKey);
+        mIconCache.onTaskRemoved(dummyKey);
     }
 
     public void setSystemUiProxy(ISystemUiProxy systemUiProxy) {
@@ -200,6 +210,21 @@
         }
     }
 
+    private void setupPackageListener() {
+        LauncherAppsCompat.getInstance(mContext)
+                .addOnAppsChangedCallback(new OnAppsChangedCallbackCompat() {
+                    @Override
+                    public void onPackageRemoved(String packageName, UserHandle user) {
+                        mIconCache.invalidatePackage(packageName);
+                    }
+
+                    @Override
+                    public void onPackageChanged(String packageName, UserHandle user) {
+                        mIconCache.invalidatePackage(packageName);
+                    }
+                });
+    }
+
     public void addThumbnailChangeListener(TaskThumbnailChangeListener listener) {
         mThumbnailChangeListeners.add(listener);
     }
diff --git a/quickstep/src/com/android/quickstep/TaskIconCache.java b/quickstep/src/com/android/quickstep/TaskIconCache.java
index 07af9b3..289a129 100644
--- a/quickstep/src/com/android/quickstep/TaskIconCache.java
+++ b/quickstep/src/com/android/quickstep/TaskIconCache.java
@@ -16,6 +16,7 @@
 package com.android.quickstep;
 
 import static com.android.launcher3.uioverrides.RecentsUiFactory.GO_LOW_RAM_RECENTS_ENABLED;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 
 import android.content.ComponentName;
 import android.content.Context;
@@ -27,26 +28,25 @@
 import android.util.LruCache;
 import android.view.accessibility.AccessibilityManager;
 
-import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.icons.cache.HandlerRunnable;
-import com.android.launcher3.uioverrides.RecentsUiFactory;
 import com.android.launcher3.util.Preconditions;
 import com.android.systemui.shared.recents.model.Task;
+import com.android.systemui.shared.recents.model.Task.TaskKey;
 import com.android.systemui.shared.recents.model.TaskKeyLruCache;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
 
+import java.util.Map;
 import java.util.function.Consumer;
 
 /**
  * Manages the caching of task icons and related data.
- * TODO: This class should later be merged into IconCache.
+ * TODO(b/138944598): This class should later be merged into IconCache.
  */
 public class TaskIconCache {
 
     private final Handler mBackgroundHandler;
-    private final MainThreadExecutor mMainThreadExecutor;
     private final AccessibilityManager mAccessibilityManager;
 
     private final NormalizedIconLoader mIconLoader;
@@ -67,7 +67,6 @@
 
     public TaskIconCache(Context context, Looper backgroundLooper) {
         mBackgroundHandler = new Handler(backgroundLooper);
-        mMainThreadExecutor = new MainThreadExecutor();
         mAccessibilityManager = context.getSystemService(AccessibilityManager.class);
 
         Resources res = context.getResources();
@@ -103,7 +102,7 @@
                     // We don't call back to the provided callback in this case
                     return;
                 }
-                mMainThreadExecutor.execute(() -> {
+                MAIN_EXECUTOR.execute(() -> {
                     task.icon = icon;
                     task.titleDescription = contentDescription;
                     callback.accept(task);
@@ -149,6 +148,21 @@
         return label;
     }
 
+
+    void onTaskRemoved(TaskKey taskKey) {
+        mIconCache.remove(taskKey);
+    }
+
+    void invalidatePackage(String packageName) {
+        // TODO(b/138944598): Merge this class into IconCache so we can do this at the base level
+        Map<ComponentName, ActivityInfo> activityInfoCache = mActivityInfoCache.snapshot();
+        for (ComponentName cn : activityInfoCache.keySet()) {
+            if (cn.getPackageName().equals(packageName)) {
+                mActivityInfoCache.remove(cn);
+            }
+        }
+    }
+
     public static abstract class IconLoadRequest extends HandlerRunnable {
         IconLoadRequest(Handler handler) {
             super(handler, null);
diff --git a/quickstep/src/com/android/quickstep/TaskThumbnailCache.java b/quickstep/src/com/android/quickstep/TaskThumbnailCache.java
index 57c5a27..3b50c26 100644
--- a/quickstep/src/com/android/quickstep/TaskThumbnailCache.java
+++ b/quickstep/src/com/android/quickstep/TaskThumbnailCache.java
@@ -15,12 +15,14 @@
  */
 package com.android.quickstep;
 
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+
 import android.app.ActivityManager;
 import android.content.Context;
 import android.content.res.Resources;
 import android.os.Handler;
 import android.os.Looper;
-import com.android.launcher3.MainThreadExecutor;
+
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.icons.cache.HandlerRunnable;
@@ -30,13 +32,13 @@
 import com.android.systemui.shared.recents.model.TaskKeyLruCache;
 import com.android.systemui.shared.recents.model.ThumbnailData;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
+
 import java.util.ArrayList;
 import java.util.function.Consumer;
 
 public class TaskThumbnailCache {
 
     private final Handler mBackgroundHandler;
-    private final MainThreadExecutor mMainThreadExecutor;
 
     private final int mCacheSize;
     private final ThumbnailCache mCache;
@@ -94,7 +96,6 @@
 
     public TaskThumbnailCache(Context context, Looper backgroundLooper) {
         mBackgroundHandler = new Handler(backgroundLooper);
-        mMainThreadExecutor = new MainThreadExecutor();
         mHighResLoadingState = new HighResLoadingState(context);
 
         Resources res = context.getResources();
@@ -168,7 +169,7 @@
                     // We don't call back to the provided callback in this case
                     return;
                 }
-                mMainThreadExecutor.execute(() -> {
+                MAIN_EXECUTOR.execute(() -> {
                     mCache.put(key, thumbnail);
                     callback.accept(thumbnail);
                     onEnd();
diff --git a/quickstep/src/com/android/quickstep/views/ShelfScrimView.java b/quickstep/src/com/android/quickstep/views/ShelfScrimView.java
index 3747f9a..dc6b56e 100644
--- a/quickstep/src/com/android/quickstep/views/ShelfScrimView.java
+++ b/quickstep/src/com/android/quickstep/views/ShelfScrimView.java
@@ -156,12 +156,14 @@
                 mDragHandleProgress = 1;
                 mMidAlpha = 0;
             } else {
-                mMidAlpha = Themes.getAttrInteger(getContext(), R.attr.allAppsInterimScrimAlpha);
+                Context context = getContext();
+                mMidAlpha = Themes.getAttrInteger(context, R.attr.allAppsInterimScrimAlpha);
                 mMidProgress =  OVERVIEW.getVerticalProgress(mLauncher);
                 Rect hotseatPadding = dp.getHotseatLayoutPadding();
                 int hotseatSize = dp.hotseatBarSizePx + dp.getInsets().bottom
                         - hotseatPadding.bottom - hotseatPadding.top;
-                float dragHandleTop = Math.min(hotseatSize, OverviewState.getDefaultSwipeHeight(dp));
+                float dragHandleTop =
+                        Math.min(hotseatSize, OverviewState.getDefaultSwipeHeight(context, dp));
                 mDragHandleProgress =  1 - (dragHandleTop / mShiftRange);
             }
             mTopOffset = dp.getInsets().top - mShelfOffset;
diff --git a/quickstep/tests/src/com/android/quickstep/AppPredictionsUITests.java b/quickstep/tests/src/com/android/quickstep/AppPredictionsUITests.java
index d0956d1..7801775 100644
--- a/quickstep/tests/src/com/android/quickstep/AppPredictionsUITests.java
+++ b/quickstep/tests/src/com/android/quickstep/AppPredictionsUITests.java
@@ -150,10 +150,10 @@
             List<AppTarget> targets = new ArrayList<>(activities.length);
             for (LauncherActivityInfo info : activities) {
                 ComponentName cn = info.getComponentName();
-                AppTarget target =
-                        new AppTarget.Builder(new AppTargetId("app:" + cn), cn.getPackageName(), info.getUser())
-                            .setClassName(cn.getClassName())
-                            .build();
+                AppTarget target = new AppTarget.Builder(
+                        new AppTargetId("app:" + cn), cn.getPackageName(), info.getUser())
+                        .setClassName(cn.getClassName())
+                        .build();
                 targets.add(target);
             }
             mCallback.onTargetsAvailable(targets);
diff --git a/quickstep/tests/src/com/android/quickstep/RecentTasksListTest.java b/quickstep/tests/src/com/android/quickstep/RecentTasksListTest.java
new file mode 100644
index 0000000..34eb7f8
--- /dev/null
+++ b/quickstep/tests/src/com/android/quickstep/RecentTasksListTest.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.quickstep;
+
+import static junit.framework.TestCase.assertNull;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Matchers.anyInt;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.app.ActivityManager;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.launcher3.util.LooperExecutor;
+import com.android.systemui.shared.recents.model.Task;
+import com.android.systemui.shared.system.ActivityManagerWrapper;
+import com.android.systemui.shared.system.KeyguardManagerCompat;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.Collections;
+import java.util.List;
+
+@SmallTest
+public class RecentTasksListTest {
+
+    private ActivityManagerWrapper mockActivityManagerWrapper;
+
+    // Class under test
+    private RecentTasksList mRecentTasksList;
+
+    @Before
+    public void setup() {
+        LooperExecutor mockMainThreadExecutor = mock(LooperExecutor.class);
+        KeyguardManagerCompat mockKeyguardManagerCompat = mock(KeyguardManagerCompat.class);
+        mockActivityManagerWrapper = mock(ActivityManagerWrapper.class);
+        mRecentTasksList = new RecentTasksList(mockMainThreadExecutor, mockKeyguardManagerCompat,
+                mockActivityManagerWrapper);
+    }
+
+    @Test
+    public void onTaskRemoved_reloadsAllTasks() {
+        mRecentTasksList.onTaskRemoved(0);
+        verify(mockActivityManagerWrapper, times(1))
+                .getRecentTasks(anyInt(), anyInt());
+    }
+
+    @Test
+    public void onTaskStackChanged_doesNotFetchTasks() {
+        mRecentTasksList.onTaskStackChanged();
+        verify(mockActivityManagerWrapper, times(0))
+                .getRecentTasks(anyInt(), anyInt());
+    }
+
+    @Test
+    public void loadTasksInBackground_onlyKeys_noValidTaskDescription() {
+        ActivityManager.RecentTaskInfo recentTaskInfo = new ActivityManager.RecentTaskInfo();
+        when(mockActivityManagerWrapper.getRecentTasks(anyInt(), anyInt()))
+                .thenReturn(Collections.singletonList(recentTaskInfo));
+
+        List<Task> taskList = mRecentTasksList.loadTasksInBackground(Integer.MAX_VALUE, true);
+
+        assertEquals(1, taskList.size());
+        assertNull(taskList.get(0).taskDescription.getLabel());
+    }
+
+    @Test
+    public void loadTasksInBackground_moreThanKeys_hasValidTaskDescription() {
+        String taskDescription = "Wheeee!";
+        ActivityManager.RecentTaskInfo recentTaskInfo = new ActivityManager.RecentTaskInfo();
+        recentTaskInfo.taskDescription = new ActivityManager.TaskDescription(taskDescription);
+        when(mockActivityManagerWrapper.getRecentTasks(anyInt(), anyInt()))
+                .thenReturn(Collections.singletonList(recentTaskInfo));
+
+        List<Task> taskList = mRecentTasksList.loadTasksInBackground(Integer.MAX_VALUE, false);
+
+        assertEquals(1, taskList.size());
+        assertEquals(taskDescription, taskList.get(0).taskDescription.getLabel());
+    }
+}
diff --git a/res/values-bn/strings.xml b/res/values-bn/strings.xml
index 775885c..09608b5 100644
--- a/res/values-bn/strings.xml
+++ b/res/values-bn/strings.xml
@@ -20,7 +20,6 @@
 <resources xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
     <string name="app_name" msgid="649227358658669779">"Launcher3"</string>
-    <string name="folder_name" msgid="7371454440695724752"></string>
     <string name="work_folder_name" msgid="3753320833950115786">"কাজ"</string>
     <string name="activity_not_found" msgid="8071924732094499514">"অ্যাপ্লিকেশান ইনস্টল করা নেই৷"</string>
     <string name="activity_not_available" msgid="7456344436509528827">"অ্যাপ্লিকেশান অনুপলব্ধ"</string>
diff --git a/res/values-hi/strings.xml b/res/values-hi/strings.xml
index 3b0432e..8fa02c0 100644
--- a/res/values-hi/strings.xml
+++ b/res/values-hi/strings.xml
@@ -20,7 +20,6 @@
 <resources xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
     <string name="app_name" msgid="649227358658669779">"Launcher3"</string>
-    <string name="folder_name" msgid="7371454440695724752"></string>
     <string name="work_folder_name" msgid="3753320833950115786">"कार्यस्‍थल"</string>
     <string name="activity_not_found" msgid="8071924732094499514">"ऐप्‍लिकेशन इंस्‍टॉल नहीं है."</string>
     <string name="activity_not_available" msgid="7456344436509528827">"ऐप्लिकेशन उपलब्ध नहीं है"</string>
diff --git a/res/values-hy/strings.xml b/res/values-hy/strings.xml
index fbb657e..93404e6 100644
--- a/res/values-hy/strings.xml
+++ b/res/values-hy/strings.xml
@@ -20,7 +20,6 @@
 <resources xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
     <string name="app_name" msgid="649227358658669779">"Launcher3"</string>
-    <string name="folder_name" msgid="7371454440695724752"></string>
     <string name="work_folder_name" msgid="3753320833950115786">"Աշխատանքային"</string>
     <string name="activity_not_found" msgid="8071924732094499514">"Ծրագիրը տեղադրված չէ:"</string>
     <string name="activity_not_available" msgid="7456344436509528827">"Հավելվածը հասանելի չէ"</string>
@@ -87,7 +86,7 @@
     <string name="allow_rotation_desc" msgid="8662546029078692509">"Հեռախոսը պտտելու դեպքում"</string>
     <string name="notification_dots_title" msgid="9062440428204120317">"Ծանուցումների կետիկներ"</string>
     <string name="notification_dots_desc_on" msgid="1679848116452218908">"Միացված է"</string>
-    <string name="notification_dots_desc_off" msgid="1760796511504341095">"Անջատած է"</string>
+    <string name="notification_dots_desc_off" msgid="1760796511504341095">"Անջատված է"</string>
     <string name="title_missing_notification_access" msgid="7503287056163941064">"Անհրաժեշտ է ծանուցման թույլտվություն"</string>
     <string name="msg_missing_notification_access" msgid="281113995110910548">"Ծանուցումների կետիկները ցուցադրելու համար միացրեք ծանուցումները <xliff:g id="NAME">%1$s</xliff:g>-ի համար"</string>
     <string name="title_change_settings" msgid="1376365968844349552">"Փոխել կարգավորումները"</string>
diff --git a/res/values-km/strings.xml b/res/values-km/strings.xml
index f4a328d..9738042 100644
--- a/res/values-km/strings.xml
+++ b/res/values-km/strings.xml
@@ -20,7 +20,6 @@
 <resources xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
     <string name="app_name" msgid="649227358658669779">"Launcher3"</string>
-    <string name="folder_name" msgid="7371454440695724752"></string>
     <string name="work_folder_name" msgid="3753320833950115786">"ការងារ"</string>
     <string name="activity_not_found" msgid="8071924732094499514">"មិន​បាន​ដំឡើង​កម្មវិធី។"</string>
     <string name="activity_not_available" msgid="7456344436509528827">"មិន​មាន​កម្មវិធី"</string>
diff --git a/res/values-ky/strings.xml b/res/values-ky/strings.xml
index 046a662..d52446c 100644
--- a/res/values-ky/strings.xml
+++ b/res/values-ky/strings.xml
@@ -20,7 +20,6 @@
 <resources xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
     <string name="app_name" msgid="649227358658669779">"Launcher3"</string>
-    <string name="folder_name" msgid="7371454440695724752"></string>
     <string name="work_folder_name" msgid="3753320833950115786">"Жумуш"</string>
     <string name="activity_not_found" msgid="8071924732094499514">"Колдонмо орнотулган эмес."</string>
     <string name="activity_not_available" msgid="7456344436509528827">"Колдонмо жеткиликтүү эмес"</string>
diff --git a/res/values-te/strings.xml b/res/values-te/strings.xml
index c8f70fe..1f8d3b8 100644
--- a/res/values-te/strings.xml
+++ b/res/values-te/strings.xml
@@ -20,7 +20,6 @@
 <resources xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
     <string name="app_name" msgid="649227358658669779">"Launcher3"</string>
-    <string name="folder_name" msgid="7371454440695724752"></string>
     <string name="work_folder_name" msgid="3753320833950115786">"కార్యాలయం"</string>
     <string name="activity_not_found" msgid="8071924732094499514">"యాప్ ఇన్‌స్టాల్ చేయబడలేదు."</string>
     <string name="activity_not_available" msgid="7456344436509528827">"యాప్ అందుబాటులో లేదు"</string>
@@ -53,7 +52,7 @@
     <string name="uninstall_drop_target_label" msgid="4722034217958379417">"అన్ఇన్‌స్టాల్ చేయి"</string>
     <string name="app_info_drop_target_label" msgid="692894985365717661">"యాప్ సమాచారం"</string>
     <string name="install_drop_target_label" msgid="2539096853673231757">"ఇన్‌స్టాల్ చేయండి"</string>
-    <string name="permlab_install_shortcut" msgid="5632423390354674437">"సత్వరమార్గాలను ఇన్‌స్టాల్ చేయడం"</string>
+    <string name="permlab_install_shortcut" msgid="5632423390354674437">"షార్ట్‌కట్‌లను ఇన్‌స్టాల్ చేయడం"</string>
     <string name="permdesc_install_shortcut" msgid="923466509822011139">"వినియోగదారు ప్రమేయం లేకుండా సత్వరమార్గాలను జోడించడానికి అనువర్తనాన్ని అనుమతిస్తుంది."</string>
     <string name="permlab_read_settings" msgid="1941457408239617576">"హోమ్ సెట్టింగ్‌లు మరియు సత్వరమార్గాలను చదవడం"</string>
     <string name="permdesc_read_settings" msgid="5833423719057558387">"హోమ్‌లో సెట్టింగ్‌లు మరియు సత్వరమార్గాలను చదవడానికి అనువర్తనాన్ని అనుమతిస్తుంది."</string>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 13e096c..9d9c2e8 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -23,8 +23,6 @@
 
     <!-- Application name -->
     <string name="app_name">Launcher3</string>
-    <!-- Default folder name -->
-    <string name="folder_name"></string>
     <!-- Work folder name -->
     <string name="work_folder_name">Work</string>
     <!-- Displayed when user selects a shortcut for an app that was uninstalled [CHAR_LIMIT=none]-->
@@ -105,6 +103,9 @@
     <!-- Label for install drop target. [CHAR_LIMIT=20] -->
     <string name="install_drop_target_label">Install</string>
 
+    <!-- Label for install dismiss prediction. -->
+    <string translatable="false" name="dismiss_prediction_label">Dismiss prediction</string>
+
     <!-- Permissions: -->
     <skip />
     <!-- Permission short label -->
diff --git a/robolectric_tests/src/com/android/launcher3/model/BaseModelUpdateTaskTestCase.java b/robolectric_tests/src/com/android/launcher3/model/BaseModelUpdateTaskTestCase.java
index ab39274..bc936b7 100644
--- a/robolectric_tests/src/com/android/launcher3/model/BaseModelUpdateTaskTestCase.java
+++ b/robolectric_tests/src/com/android/launcher3/model/BaseModelUpdateTaskTestCase.java
@@ -15,14 +15,13 @@
 import android.os.Process;
 import android.os.UserHandle;
 
-import com.android.launcher3.AllAppsList;
 import com.android.launcher3.AppFilter;
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherModel;
-import com.android.launcher3.LauncherModel.Callbacks;
+import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.LauncherModel.ModelUpdateTask;
 import com.android.launcher3.LauncherProvider;
 import com.android.launcher3.icons.IconCache;
diff --git a/robolectric_tests/src/com/android/launcher3/util/IntArrayTest.java b/robolectric_tests/src/com/android/launcher3/util/IntArrayTest.java
new file mode 100644
index 0000000..c08e198
--- /dev/null
+++ b/robolectric_tests/src/com/android/launcher3/util/IntArrayTest.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.util;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+/**
+ * Robolectric unit tests for {@link IntArray}
+ */
+@RunWith(RobolectricTestRunner.class)
+public class IntArrayTest {
+
+    @Test
+    public void concatAndParseString() {
+        int[] array = new int[] {0, 2, 3, 9};
+        String concat = IntArray.wrap(array).toConcatString();
+
+        int[] parsed = IntArray.fromConcatString(concat).toArray();
+        assertThat(array).isEqualTo(parsed);
+    }
+}
diff --git a/robolectric_tests/src/com/android/launcher3/util/IntSetTest.java b/robolectric_tests/src/com/android/launcher3/util/IntSetTest.java
index f846de5..8513353 100644
--- a/robolectric_tests/src/com/android/launcher3/util/IntSetTest.java
+++ b/robolectric_tests/src/com/android/launcher3/util/IntSetTest.java
@@ -21,7 +21,6 @@
 import org.junit.runner.RunWith;
 
 import org.robolectric.RobolectricTestRunner;
-import org.robolectric.annotation.Config;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
diff --git a/src/com/android/launcher3/AbstractFloatingView.java b/src/com/android/launcher3/AbstractFloatingView.java
index 65f9d6b..8fddf3c 100644
--- a/src/com/android/launcher3/AbstractFloatingView.java
+++ b/src/com/android/launcher3/AbstractFloatingView.java
@@ -86,7 +86,7 @@
 
     // Type of popups which should be kept open during launcher rebind
     public static final int TYPE_REBIND_SAFE = TYPE_WIDGETS_FULL_SHEET
-            | TYPE_ON_BOARD_POPUP | TYPE_DISCOVERY_BOUNCE;
+            | TYPE_WIDGETS_BOTTOM_SHEET | TYPE_ON_BOARD_POPUP | TYPE_DISCOVERY_BOUNCE;
 
     // Usually we show the back button when a floating view is open. Instead, hide for these types.
     public static final int TYPE_HIDE_BACK_BUTTON = TYPE_ON_BOARD_POPUP | TYPE_DISCOVERY_BOUNCE
diff --git a/src/com/android/launcher3/AppInfo.java b/src/com/android/launcher3/AppInfo.java
index d884049..c8e7619 100644
--- a/src/com/android/launcher3/AppInfo.java
+++ b/src/com/android/launcher3/AppInfo.java
@@ -29,11 +29,19 @@
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.PackageManagerHelper;
 
+import java.util.Comparator;
+
 /**
  * Represents an app in AllAppsView.
  */
 public class AppInfo extends ItemInfoWithIcon {
 
+    public static AppInfo[] EMPTY_ARRAY = new AppInfo[0];
+    public static Comparator<AppInfo> COMPONENT_KEY_COMPARATOR = (a, b) -> {
+        int uc = a.user.hashCode() - b.user.hashCode();
+        return uc != 0 ? uc : a.componentName.compareTo(b.componentName);
+    };
+
     /**
      * The intent used to start the application.
      */
@@ -41,6 +49,9 @@
 
     public ComponentName componentName;
 
+    // Section name used for indexing.
+    public String sectionName = "";
+
     public AppInfo() {
         itemType = LauncherSettings.Favorites.ITEM_TYPE_APPLICATION;
     }
@@ -74,6 +85,8 @@
         componentName = info.componentName;
         title = Utilities.trim(info.title);
         intent = new Intent(info.intent);
+        user = info.user;
+        runtimeStatusFlags = info.runtimeStatusFlags;
     }
 
     @Override
@@ -116,4 +129,9 @@
             info.runtimeStatusFlags |= FLAG_ADAPTIVE_ICON;
         }
     }
+
+    @Override
+    public AppInfo clone() {
+        return new AppInfo(this);
+    }
 }
diff --git a/src/com/android/launcher3/AutoInstallsLayout.java b/src/com/android/launcher3/AutoInstallsLayout.java
index 9724869..ac43967 100644
--- a/src/com/android/launcher3/AutoInstallsLayout.java
+++ b/src/com/android/launcher3/AutoInstallsLayout.java
@@ -38,11 +38,15 @@
 import android.util.Patterns;
 import android.util.Xml;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.LauncherProvider.SqlArguments;
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.icons.GraphicsUtils;
 import com.android.launcher3.icons.LauncherIcons;
+import com.android.launcher3.qsb.QsbContainerView;
 import com.android.launcher3.util.IntArray;
+import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.Thunk;
 
 import org.xmlpull.v1.XmlPullParser;
@@ -72,7 +76,7 @@
 
     static AutoInstallsLayout get(Context context, AppWidgetHost appWidgetHost,
             LayoutParserCallback callback) {
-        Pair<String, Resources> customizationApkInfo = Utilities.findSystemApk(
+        Pair<String, Resources> customizationApkInfo = PackageManagerHelper.findSystemApk(
                 ACTION_LAUNCHER_CUSTOMIZATION, context.getPackageManager());
         if (customizationApkInfo == null) {
             return null;
@@ -83,7 +87,7 @@
 
         // Try with grid size and hotseat count
         String layoutName = String.format(Locale.ENGLISH, FORMATTED_LAYOUT_RES_WITH_HOSTEAT,
-            grid.numColumns, grid.numRows, grid.numHotseatIcons);
+                grid.numColumns, grid.numRows, grid.numHotseatIcons);
         int layoutId = targetRes.getIdentifier(layoutName, "xml", pkg);
 
         // Try with only grid size
@@ -91,7 +95,7 @@
             Log.d(TAG, "Formatted layout: " + layoutName
                     + " not found. Trying layout without hosteat");
             layoutName = String.format(Locale.ENGLISH, FORMATTED_LAYOUT_RES,
-                grid.numColumns, grid.numRows);
+                    grid.numColumns, grid.numRows);
             layoutId = targetRes.getIdentifier(layoutName, "xml", pkg);
         }
 
@@ -116,6 +120,7 @@
     private static final String TAG_AUTO_INSTALL = "autoinstall";
     private static final String TAG_FOLDER = "folder";
     private static final String TAG_APPWIDGET = "appwidget";
+    protected static final String TAG_SEARCH_WIDGET = "searchwidget";
     private static final String TAG_SHORTCUT = "shortcut";
     private static final String TAG_EXTRA = "extra";
 
@@ -147,8 +152,10 @@
     private static final String HOTSEAT_CONTAINER_NAME =
             Favorites.containerToString(Favorites.CONTAINER_HOTSEAT);
 
-    @Thunk final Context mContext;
-    @Thunk final AppWidgetHost mAppWidgetHost;
+    @Thunk
+    final Context mContext;
+    @Thunk
+    final AppWidgetHost mAppWidgetHost;
     protected final LayoutParserCallback mCallback;
 
     protected final PackageManager mPackageManager;
@@ -160,7 +167,8 @@
     private final int mColumnCount;
 
     private final int[] mTemp = new int[2];
-    @Thunk final ContentValues mValues;
+    @Thunk
+    final ContentValues mValues;
     protected final String mRootTag;
 
     protected SQLiteDatabase mDb;
@@ -244,7 +252,7 @@
      */
     protected int parseAndAddNode(
             XmlPullParser parser, ArrayMap<String, TagParser> tagParserMap, IntArray screenIds)
-        throws XmlPullParserException, IOException {
+            throws XmlPullParserException, IOException {
 
         if (TAG_INCLUDE.equals(parser.getName())) {
             final int resId = getAttributeResourceValue(parser, ATTR_WORKSPACE, 0);
@@ -315,6 +323,7 @@
         parsers.put(TAG_AUTO_INSTALL, new AutoInstallParser());
         parsers.put(TAG_FOLDER, new FolderParser());
         parsers.put(TAG_APPWIDGET, new PendingWidgetParser());
+        parsers.put(TAG_SEARCH_WIDGET, new SearchWidgetParser());
         parsers.put(TAG_SHORTCUT, new ShortcutParser(mSourceRes));
         return parsers;
     }
@@ -347,15 +356,15 @@
                         info = mPackageManager.getActivityInfo(cn, 0);
                     } catch (PackageManager.NameNotFoundException nnfe) {
                         String[] packages = mPackageManager.currentToCanonicalPackageNames(
-                                new String[] { packageName });
+                                new String[]{packageName});
                         cn = new ComponentName(packages[0], className);
                         info = mPackageManager.getActivityInfo(cn, 0);
                     }
                     final Intent intent = new Intent(Intent.ACTION_MAIN, null)
-                        .addCategory(Intent.CATEGORY_LAUNCHER)
-                        .setComponent(cn)
-                        .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
-                                Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
+                            .addCategory(Intent.CATEGORY_LAUNCHER)
+                            .setComponent(cn)
+                            .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
+                                    | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
 
                     return addShortcut(info.loadLabel(mPackageManager).toString(),
                             intent, Favorites.ITEM_TYPE_APPLICATION);
@@ -393,10 +402,10 @@
 
             mValues.put(Favorites.RESTORED, WorkspaceItemInfo.FLAG_AUTOINSTALL_ICON);
             final Intent intent = new Intent(Intent.ACTION_MAIN, null)
-                .addCategory(Intent.CATEGORY_LAUNCHER)
-                .setComponent(new ComponentName(packageName, className))
-                .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
-                        Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
+                    .addCategory(Intent.CATEGORY_LAUNCHER)
+                    .setComponent(new ComponentName(packageName, className))
+                    .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
+                            | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
             return addShortcut(mContext.getString(R.string.package_state_unknown), intent,
                     Favorites.ITEM_TYPE_APPLICATION);
         }
@@ -444,7 +453,7 @@
             mValues.put(Favorites.ICON_RESOURCE, mIconRes.getResourceName(iconId));
 
             intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
-                        Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
+                    Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
             return addShortcut(mSourceRes.getString(titleResId),
                     intent, Favorites.ITEM_TYPE_SHORTCUT);
         }
@@ -469,12 +478,22 @@
      */
     protected class PendingWidgetParser implements TagParser {
 
-        @Override
-        public int parseAndAdd(XmlPullParser parser)
-                throws XmlPullParserException, IOException {
+        @Nullable
+        public ComponentName getComponentName(XmlPullParser parser) {
             final String packageName = getAttributeValue(parser, ATTR_PACKAGE_NAME);
             final String className = getAttributeValue(parser, ATTR_CLASS_NAME);
             if (TextUtils.isEmpty(packageName) || TextUtils.isEmpty(className)) {
+                return null;
+            }
+            return new ComponentName(packageName, className);
+        }
+
+
+        @Override
+        public int parseAndAdd(XmlPullParser parser)
+                throws XmlPullParserException, IOException {
+            ComponentName cn = getComponentName(parser);
+            if (cn == null) {
                 if (LOGD) Log.d(TAG, "Skipping invalid <appwidget> with no component");
                 return -1;
             }
@@ -505,16 +524,15 @@
                     throw new RuntimeException("Widgets can contain only extras");
                 }
             }
-
-            return verifyAndInsert(new ComponentName(packageName, className), extras);
+            return verifyAndInsert(cn, extras);
         }
 
         protected int verifyAndInsert(ComponentName cn, Bundle extras) {
             mValues.put(Favorites.APPWIDGET_PROVIDER, cn.flattenToString());
             mValues.put(Favorites.RESTORED,
-                    LauncherAppWidgetInfo.FLAG_ID_NOT_VALID |
-                            LauncherAppWidgetInfo.FLAG_PROVIDER_NOT_READY |
-                            LauncherAppWidgetInfo.FLAG_DIRECT_CONFIG);
+                    LauncherAppWidgetInfo.FLAG_ID_NOT_VALID
+                            | LauncherAppWidgetInfo.FLAG_PROVIDER_NOT_READY
+                            | LauncherAppWidgetInfo.FLAG_DIRECT_CONFIG);
             mValues.put(Favorites._ID, mCallback.generateNewItemId());
             if (!extras.isEmpty()) {
                 mValues.put(Favorites.INTENT, new Intent().putExtras(extras).toUri(0));
@@ -529,6 +547,23 @@
         }
     }
 
+    protected class SearchWidgetParser extends PendingWidgetParser {
+        @Override
+        @Nullable
+        public ComponentName getComponentName(XmlPullParser parser) {
+            return QsbContainerView.getSearchComponentName(mContext);
+        }
+
+        @Override
+        protected int verifyAndInsert(ComponentName cn, Bundle extras) {
+            mValues.put(Favorites.OPTIONS, LauncherAppWidgetInfo.OPTION_SEARCH_WIDGET);
+            int flags = mValues.getAsInteger(Favorites.RESTORED)
+                    | WorkspaceItemInfo.FLAG_RESTORE_STARTED;
+            mValues.put(Favorites.RESTORED, flags);
+            return super.verifyAndInsert(cn, extras);
+        }
+    }
+
     protected class FolderParser implements TagParser {
         private final ArrayMap<String, TagParser> mFolderElements;
 
@@ -548,7 +583,7 @@
             if (titleResId != 0) {
                 title = mSourceRes.getString(titleResId);
             } else {
-                title = mContext.getResources().getString(R.string.folder_name);
+                title = "";
             }
 
             mValues.put(Favorites.TITLE, title);
@@ -680,7 +715,8 @@
         int insertAndCheck(SQLiteDatabase db, ContentValues values);
     }
 
-    @Thunk static void copyInteger(ContentValues from, ContentValues to, String key) {
+    @Thunk
+    static void copyInteger(ContentValues from, ContentValues to, String key) {
         to.put(key, from.getAsInteger(key));
     }
 }
diff --git a/src/com/android/launcher3/BaseDraggingActivity.java b/src/com/android/launcher3/BaseDraggingActivity.java
index f0b3afd..f61051f 100644
--- a/src/com/android/launcher3/BaseDraggingActivity.java
+++ b/src/com/android/launcher3/BaseDraggingActivity.java
@@ -34,9 +34,9 @@
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.model.AppLaunchTracker;
 import com.android.launcher3.shortcuts.DeepShortcutManager;
-import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.uioverrides.DisplayRotationListener;
 import com.android.launcher3.uioverrides.WallpaperColorInfo;
+import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.Themes;
 
 import androidx.annotation.Nullable;
@@ -120,6 +120,10 @@
 
     public abstract View getRootView();
 
+    public void returnToHomescreen() {
+        // no-op
+    }
+
     public Rect getViewBounds(View v) {
         int[] pos = new int[2];
         v.getLocationOnScreen(pos);
@@ -135,7 +139,7 @@
 
     public boolean startActivitySafely(View v, Intent intent, @Nullable ItemInfo item,
             @Nullable String sourceContainer) {
-        if (mIsSafeModeEnabled && !Utilities.isSystemApp(this, intent)) {
+        if (mIsSafeModeEnabled && !PackageManagerHelper.isSystemApp(this, intent)) {
             Toast.makeText(this, R.string.safemode_shortcut_error, Toast.LENGTH_SHORT).show();
             return false;
         }
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index 09fb244..976ccd5 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -2702,6 +2702,14 @@
             }
         }
 
+        /**
+         * Sets the position to the provided point
+         */
+        public void setXY(Point point) {
+            cellX = point.x;
+            cellY = point.y;
+        }
+
         public String toString() {
             return "(" + this.cellX + ", " + this.cellY + ")";
         }
diff --git a/src/com/android/launcher3/DefaultLayoutParser.java b/src/com/android/launcher3/DefaultLayoutParser.java
index 75297f6..af85594 100644
--- a/src/com/android/launcher3/DefaultLayoutParser.java
+++ b/src/com/android/launcher3/DefaultLayoutParser.java
@@ -14,13 +14,16 @@
 import android.text.TextUtils;
 import android.util.ArrayMap;
 import android.util.Log;
+
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.util.Thunk;
+
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+
 import java.io.IOException;
 import java.net.URISyntaxException;
 import java.util.List;
-import org.xmlpull.v1.XmlPullParser;
-import org.xmlpull.v1.XmlPullParserException;
 
 /**
  * Implements the layout parser with rules for internal layouts and partner layouts.
@@ -55,7 +58,8 @@
         return getFolderElementsMap(mSourceRes);
     }
 
-    @Thunk ArrayMap<String, TagParser> getFolderElementsMap(Resources res) {
+    @Thunk
+    ArrayMap<String, TagParser> getFolderElementsMap(Resources res) {
         ArrayMap<String, TagParser> parsers = new ArrayMap<>();
         parsers.put(TAG_FAVORITE, new AppShortcutWithUriParser());
         parsers.put(TAG_SHORTCUT, new UriShortcutParser(res));
@@ -67,6 +71,7 @@
         ArrayMap<String, TagParser> parsers = new ArrayMap<>();
         parsers.put(TAG_FAVORITE, new AppShortcutWithUriParser());
         parsers.put(TAG_APPWIDGET, new AppWidgetParser());
+        parsers.put(TAG_SEARCH_WIDGET, new SearchWidgetParser());
         parsers.put(TAG_SHORTCUT, new UriShortcutParser(mSourceRes));
         parsers.put(TAG_RESOLVE, new ResolveParser());
         parsers.put(TAG_FOLDER, new MyFolderParser());
@@ -229,7 +234,8 @@
     /**
      * A parser which adds a folder whose contents come from partner apk.
      */
-    @Thunk class PartnerFolderParser implements TagParser {
+    @Thunk
+    class PartnerFolderParser implements TagParser {
 
         @Override
         public int parseAndAdd(XmlPullParser parser) throws XmlPullParserException,
@@ -255,7 +261,8 @@
     /**
      * An extension of FolderParser which allows adding items from a different xml.
      */
-    @Thunk class MyFolderParser extends FolderParser {
+    @Thunk
+    class MyFolderParser extends FolderParser {
 
         @Override
         public int parseAndAdd(XmlPullParser parser) throws XmlPullParserException,
@@ -281,7 +288,7 @@
                 mPackageManager.getReceiverInfo(cn, 0);
             } catch (Exception e) {
                 String[] packages = mPackageManager.currentToCanonicalPackageNames(
-                        new String[] { cn.getPackageName() });
+                        new String[]{cn.getPackageName()});
                 cn = new ComponentName(packages[0], cn.getClassName());
                 try {
                     mPackageManager.getReceiverInfo(cn, 0);
diff --git a/src/com/android/launcher3/FolderInfo.java b/src/com/android/launcher3/FolderInfo.java
index b747d62..67d5ab0 100644
--- a/src/com/android/launcher3/FolderInfo.java
+++ b/src/com/android/launcher3/FolderInfo.java
@@ -50,9 +50,9 @@
     /**
      * The apps and shortcuts
      */
-    public ArrayList<WorkspaceItemInfo> contents = new ArrayList<WorkspaceItemInfo>();
+    public ArrayList<WorkspaceItemInfo> contents = new ArrayList<>();
 
-    ArrayList<FolderListener> listeners = new ArrayList<FolderListener>();
+    private ArrayList<FolderListener> mListeners = new ArrayList<>();
 
     public FolderInfo() {
         itemType = LauncherSettings.Favorites.ITEM_TYPE_FOLDER;
@@ -72,10 +72,10 @@
      * Add an app or shortcut for a specified rank.
      */
     public void add(WorkspaceItemInfo item, int rank, boolean animate) {
-        rank = Utilities.boundToRange(rank, 0, contents.size());
+        rank = Utilities.boundToRange(rank, 0, contents.size() + 1);
         contents.add(rank, item);
-        for (int i = 0; i < listeners.size(); i++) {
-            listeners.get(i).onAdd(item, rank);
+        for (int i = 0; i < mListeners.size(); i++) {
+            mListeners.get(i).onAdd(item, rank);
         }
         itemsChanged(animate);
     }
@@ -87,16 +87,16 @@
      */
     public void remove(WorkspaceItemInfo item, boolean animate) {
         contents.remove(item);
-        for (int i = 0; i < listeners.size(); i++) {
-            listeners.get(i).onRemove(item);
+        for (int i = 0; i < mListeners.size(); i++) {
+            mListeners.get(i).onRemove(item);
         }
         itemsChanged(animate);
     }
 
     public void setTitle(CharSequence title) {
         this.title = title;
-        for (int i = 0; i < listeners.size(); i++) {
-            listeners.get(i).onTitleChanged(title);
+        for (int i = 0; i < mListeners.size(); i++) {
+            mListeners.get(i).onTitleChanged(title);
         }
     }
 
@@ -105,26 +105,25 @@
         super.onAddToDatabase(writer);
         writer.put(LauncherSettings.Favorites.TITLE, title)
                 .put(LauncherSettings.Favorites.OPTIONS, options);
-
     }
 
     public void addListener(FolderListener listener) {
-        listeners.add(listener);
+        mListeners.add(listener);
     }
 
     public void removeListener(FolderListener listener) {
-        listeners.remove(listener);
+        mListeners.remove(listener);
     }
 
     public void itemsChanged(boolean animate) {
-        for (int i = 0; i < listeners.size(); i++) {
-            listeners.get(i).onItemsChanged(animate);
+        for (int i = 0; i < mListeners.size(); i++) {
+            mListeners.get(i).onItemsChanged(animate);
         }
     }
 
     public void prepareAutoUpdate() {
-        for (int i = 0; i < listeners.size(); i++) {
-            listeners.get(i).prepareAutoUpdate();
+        for (int i = 0; i < mListeners.size(); i++) {
+            mListeners.get(i).prepareAutoUpdate();
         }
     }
 
diff --git a/src/com/android/launcher3/InstallShortcutReceiver.java b/src/com/android/launcher3/InstallShortcutReceiver.java
index 670cd28..fb80537 100644
--- a/src/com/android/launcher3/InstallShortcutReceiver.java
+++ b/src/com/android/launcher3/InstallShortcutReceiver.java
@@ -16,10 +16,11 @@
 
 package com.android.launcher3;
 
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+
 import android.appwidget.AppWidgetManager;
 import android.appwidget.AppWidgetProviderInfo;
 import android.content.BroadcastReceiver;
-import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
@@ -29,8 +30,6 @@
 import android.content.pm.ShortcutInfo;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
-import android.os.Handler;
-import android.os.Message;
 import android.os.Parcelable;
 import android.os.Process;
 import android.os.UserHandle;
@@ -39,6 +38,8 @@
 import android.util.Log;
 import android.util.Pair;
 
+import androidx.annotation.WorkerThread;
+
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.compat.UserManagerCompat;
 import com.android.launcher3.icons.BitmapInfo;
@@ -65,9 +66,6 @@
 
 public class InstallShortcutReceiver extends BroadcastReceiver {
 
-    private static final int MSG_ADD_TO_QUEUE = 1;
-    private static final int MSG_FLUSH_QUEUE = 2;
-
     public static final int FLAG_ACTIVITY_PAUSED = 1;
     public static final int FLAG_LOADER_RUNNING = 2;
     public static final int FLAG_DRAG_AND_DROP = 4;
@@ -100,66 +98,56 @@
     public static final int NEW_SHORTCUT_BOUNCE_DURATION = 450;
     public static final int NEW_SHORTCUT_STAGGER_DELAY = 85;
 
-    private static final Handler sHandler = new Handler(LauncherModel.getWorkerLooper()) {
+    @WorkerThread
+    private static void addToQueue(Context context, PendingInstallShortcutInfo info) {
+        String encoded = info.encodeToString();
+        SharedPreferences prefs = Utilities.getPrefs(context);
+        Set<String> strings = prefs.getStringSet(APPS_PENDING_INSTALL, null);
+        strings = (strings != null) ? new HashSet<>(strings) : new HashSet<>(1);
+        strings.add(encoded);
+        prefs.edit().putStringSet(APPS_PENDING_INSTALL, strings).apply();
+    }
 
-        @Override
-        public void handleMessage(Message msg) {
-            switch (msg.what) {
-                case MSG_ADD_TO_QUEUE: {
-                    Pair<Context, PendingInstallShortcutInfo> pair =
-                            (Pair<Context, PendingInstallShortcutInfo>) msg.obj;
-                    String encoded = pair.second.encodeToString();
-                    SharedPreferences prefs = Utilities.getPrefs(pair.first);
-                    Set<String> strings = prefs.getStringSet(APPS_PENDING_INSTALL, null);
-                    strings = (strings != null) ? new HashSet<>(strings) : new HashSet<String>(1);
-                    strings.add(encoded);
-                    prefs.edit().putStringSet(APPS_PENDING_INSTALL, strings).apply();
-                    return;
-                }
-                case MSG_FLUSH_QUEUE: {
-                    Context context = (Context) msg.obj;
-                    LauncherModel model = LauncherAppState.getInstance(context).getModel();
-                    if (model.getCallback() == null) {
-                        // Launcher not loaded
-                        return;
-                    }
-
-                    ArrayList<Pair<ItemInfo, Object>> installQueue = new ArrayList<>();
-                    SharedPreferences prefs = Utilities.getPrefs(context);
-                    Set<String> strings = prefs.getStringSet(APPS_PENDING_INSTALL, null);
-                    if (DBG) Log.d(TAG, "Getting and clearing APPS_PENDING_INSTALL: " + strings);
-                    if (strings == null) {
-                        return;
-                    }
-
-                    LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(context);
-                    for (String encoded : strings) {
-                        PendingInstallShortcutInfo info = decode(encoded, context);
-                        if (info == null) {
-                            continue;
-                        }
-
-                        String pkg = getIntentPackage(info.launchIntent);
-                        if (!TextUtils.isEmpty(pkg)
-                                && !launcherApps.isPackageEnabledForProfile(pkg, info.user)
-                                && !info.isActivity) {
-                            if (DBG) Log.d(TAG, "Ignoring shortcut for absent package: "
-                                    + info.launchIntent);
-                            continue;
-                        }
-
-                        // Generate a shortcut info to add into the model
-                        installQueue.add(info.getItemInfo());
-                    }
-                    prefs.edit().remove(APPS_PENDING_INSTALL).apply();
-                    if (!installQueue.isEmpty()) {
-                        model.addAndBindAddedWorkspaceItems(installQueue);
-                    }
-                    return;
-                }
-            }
+    @WorkerThread
+    private static void flushQueueInBackground(Context context) {
+        LauncherModel model = LauncherAppState.getInstance(context).getModel();
+        if (model.getCallback() == null) {
+            // Launcher not loaded
+            return;
         }
-    };
+
+        ArrayList<Pair<ItemInfo, Object>> installQueue = new ArrayList<>();
+        SharedPreferences prefs = Utilities.getPrefs(context);
+        Set<String> strings = prefs.getStringSet(APPS_PENDING_INSTALL, null);
+        if (DBG) Log.d(TAG, "Getting and clearing APPS_PENDING_INSTALL: " + strings);
+        if (strings == null) {
+            return;
+        }
+
+        LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(context);
+        for (String encoded : strings) {
+            PendingInstallShortcutInfo info = decode(encoded, context);
+            if (info == null) {
+                continue;
+            }
+
+            String pkg = getIntentPackage(info.launchIntent);
+            if (!TextUtils.isEmpty(pkg)
+                    && !launcherApps.isPackageEnabledForProfile(pkg, info.user)) {
+                if (DBG) {
+                    Log.d(TAG, "Ignoring shortcut for absent package: " + info.launchIntent);
+                }
+                continue;
+            }
+
+            // Generate a shortcut info to add into the model
+            installQueue.add(info.getItemInfo());
+        }
+        prefs.edit().remove(APPS_PENDING_INSTALL).apply();
+        if (!installQueue.isEmpty()) {
+            model.addAndBindAddedWorkspaceItems(installQueue);
+        }
+    }
 
     public static void removeFromInstallQueue(Context context, HashSet<String> packageNames,
             UserHandle user) {
@@ -291,7 +279,7 @@
 
     private static void queuePendingShortcutInfo(PendingInstallShortcutInfo info, Context context) {
         // Queue the item up for adding if launcher has not loaded properly yet
-        Message.obtain(sHandler, MSG_ADD_TO_QUEUE, Pair.create(context, info)).sendToTarget();
+        MODEL_EXECUTOR.post(() -> addToQueue(context, info));
         flushInstallQueue(context);
     }
 
@@ -307,7 +295,7 @@
         if (sInstallQueueDisabledFlags != 0) {
             return;
         }
-        Message.obtain(sHandler, MSG_FLUSH_QUEUE, context.getApplicationContext()).sendToTarget();
+        MODEL_EXECUTOR.post(() -> flushQueueInBackground(context));
     }
 
     /**
@@ -617,7 +605,7 @@
             // Already an activity target
             return original;
         }
-        if (!Utilities.isLauncherAppTarget(original.launchIntent)) {
+        if (!PackageManagerHelper.isLauncherAppTarget(original.launchIntent)) {
             return original;
         }
 
diff --git a/src/com/android/launcher3/InvariantDeviceProfile.java b/src/com/android/launcher3/InvariantDeviceProfile.java
index bde87cb..8ee530f 100644
--- a/src/com/android/launcher3/InvariantDeviceProfile.java
+++ b/src/com/android/launcher3/InvariantDeviceProfile.java
@@ -18,6 +18,7 @@
 
 import static com.android.launcher3.Utilities.getDevicePrefs;
 import static com.android.launcher3.config.FeatureFlags.APPLY_CONFIG_AT_RUNTIME;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 import static com.android.launcher3.util.PackageManagerHelper.getPackageFilter;
 
 import android.annotation.TargetApi;
@@ -42,6 +43,9 @@
 import android.view.Display;
 import android.view.WindowManager;
 
+import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
+
 import com.android.launcher3.graphics.IconShape;
 import com.android.launcher3.util.ConfigMonitor;
 import com.android.launcher3.util.IntArray;
@@ -55,9 +59,6 @@
 import java.util.ArrayList;
 import java.util.Collections;
 
-import androidx.annotation.Nullable;
-import androidx.annotation.VisibleForTesting;
-
 public class InvariantDeviceProfile {
 
     public static final String TAG = "IDP";
@@ -280,7 +281,7 @@
     public void setCurrentGrid(Context context, String gridName) {
         Context appContext = context.getApplicationContext();
         Utilities.getPrefs(appContext).edit().putString(KEY_IDP_GRID_NAME, gridName).apply();
-        new MainThreadExecutor().execute(() -> onConfigChanged(appContext));
+        MAIN_EXECUTOR.execute(() -> onConfigChanged(appContext));
     }
 
     private void onConfigChanged(Context context) {
diff --git a/src/com/android/launcher3/ItemInfoWithIcon.java b/src/com/android/launcher3/ItemInfoWithIcon.java
index e29f927..1550bb0 100644
--- a/src/com/android/launcher3/ItemInfoWithIcon.java
+++ b/src/com/android/launcher3/ItemInfoWithIcon.java
@@ -27,6 +27,8 @@
  */
 public abstract class ItemInfoWithIcon extends ItemInfo {
 
+    public static final String TAG = "ItemInfoDebug";
+
     /**
      * A bitmap version of the application icon.
      */
@@ -126,4 +128,8 @@
         iconColor = info.color;
     }
 
+    /**
+     * @return a copy of this
+     */
+    public abstract ItemInfoWithIcon clone();
 }
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index d79230f..aa02441 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -16,10 +16,11 @@
 
 package com.android.launcher3;
 
-import static android.content.pm.ActivityInfo.CONFIG_LOCALE;
 import static android.content.pm.ActivityInfo.CONFIG_ORIENTATION;
 import static android.content.pm.ActivityInfo.CONFIG_SCREEN_SIZE;
 
+import static com.android.launcher3.AbstractFloatingView.TYPE_ALL;
+import static com.android.launcher3.AbstractFloatingView.TYPE_REBIND_SAFE;
 import static com.android.launcher3.AbstractFloatingView.TYPE_SNACKBAR;
 import static com.android.launcher3.LauncherAnimUtils.SPRING_LOADED_EXIT_DELAY;
 import static com.android.launcher3.LauncherState.ALL_APPS;
@@ -77,6 +78,8 @@
 import android.view.animation.OvershootInterpolator;
 import android.widget.Toast;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.DropTarget.DragObject;
 import com.android.launcher3.accessibility.LauncherAccessibilityDelegate;
 import com.android.launcher3.allapps.AllAppsContainerView;
@@ -91,9 +94,8 @@
 import com.android.launcher3.dragndrop.DragController;
 import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.dragndrop.DragView;
-import com.android.launcher3.folder.Folder;
+import com.android.launcher3.folder.FolderGridOrganizer;
 import com.android.launcher3.folder.FolderIcon;
-import com.android.launcher3.folder.FolderIconPreviewVerifier;
 import com.android.launcher3.graphics.RotationMode;
 import com.android.launcher3.icons.IconCache;
 import com.android.launcher3.keyboard.CustomActionsPopup;
@@ -103,14 +105,14 @@
 import com.android.launcher3.logging.UserEventDispatcher;
 import com.android.launcher3.logging.UserEventDispatcher.UserEventDelegate;
 import com.android.launcher3.model.AppLaunchTracker;
+import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.model.ModelWriter;
 import com.android.launcher3.notification.NotificationListener;
 import com.android.launcher3.popup.PopupContainerWithArrow;
 import com.android.launcher3.popup.PopupDataProvider;
-import com.android.launcher3.shortcuts.DeepShortcutManager;
+import com.android.launcher3.qsb.QsbContainerView;
 import com.android.launcher3.states.InternalStateHandler;
 import com.android.launcher3.states.RotationHelper;
-import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.touch.ItemClickHandler;
 import com.android.launcher3.uioverrides.UiFactory;
 import com.android.launcher3.userevent.nano.LauncherLogProto;
@@ -156,13 +158,11 @@
 import java.util.List;
 import java.util.function.Predicate;
 
-import androidx.annotation.Nullable;
-
 /**
  * Default launcher application.
  */
 public class Launcher extends BaseDraggingActivity implements LauncherExterns,
-        LauncherModel.Callbacks, LauncherProviderChangeListener, UserEventDelegate,
+        Callbacks, LauncherProviderChangeListener, UserEventDelegate,
         InvariantDeviceProfile.OnIDPChangeListener {
     public static final String TAG = "Launcher";
     static final boolean LOGD = false;
@@ -211,7 +211,8 @@
     // How long to wait before the new-shortcut animation automatically pans the workspace
     private static final int NEW_APPS_PAGE_MOVE_DELAY = 500;
     private static final int NEW_APPS_ANIMATION_INACTIVE_TIMEOUT_SECONDS = 5;
-    @Thunk static final int NEW_APPS_ANIMATION_DELAY = 500;
+    @Thunk
+    static final int NEW_APPS_ANIMATION_DELAY = 500;
 
     private static final int APPS_VIEW_ALPHA_CHANNEL_INDEX = 1;
     private static final int SCRIM_VIEW_ALPHA_CHANNEL_INDEX = 0;
@@ -219,9 +220,11 @@
     private LauncherAppTransitionManager mAppTransitionManager;
     private Configuration mOldConfig;
 
-    @Thunk Workspace mWorkspace;
+    @Thunk
+    Workspace mWorkspace;
     private View mLauncherView;
-    @Thunk DragLayer mDragLayer;
+    @Thunk
+    DragLayer mDragLayer;
     private DragController mDragController;
 
     private AppWidgetManagerCompat mAppWidgetManager;
@@ -229,21 +232,25 @@
 
     private final int[] mTmpAddItemCellCoordinates = new int[2];
 
-    @Thunk Hotseat mHotseat;
+    @Thunk
+    Hotseat mHotseat;
 
     private DropTargetBar mDropTargetBar;
 
     // Main container view for the all apps screen.
-    @Thunk AllAppsContainerView mAppsView;
+    @Thunk
+    AllAppsContainerView mAppsView;
     AllAppsTransitionController mAllAppsController;
 
     // Scrim view for the all apps and overview state.
-    @Thunk ScrimView mScrimView;
+    @Thunk
+    ScrimView mScrimView;
 
     // UI and state for the overview panel
     private View mOverviewPanel;
 
-    @Thunk boolean mWorkspaceLoading = true;
+    @Thunk
+    boolean mWorkspaceLoading = true;
 
     private ArrayList<OnResumeCallback> mOnResumeCallbacks = new ArrayList<>();
 
@@ -388,7 +395,8 @@
         RaceConditionTracker.onEvent(ON_CREATE_EVT, EXIT);
         mStateManager.addStateListener(new LauncherStateManager.StateListener() {
             @Override
-            public void onStateTransitionStart(LauncherState toState) {}
+            public void onStateTransitionStart(LauncherState toState) {
+            }
 
             @Override
             public void onStateTransitionComplete(LauncherState finalState) {
@@ -418,10 +426,6 @@
     public void onConfigurationChanged(Configuration newConfig) {
         int diff = newConfig.diff(mOldConfig);
 
-        if ((diff & CONFIG_LOCALE) != 0) {
-            Folder.setLocaleDependentFields(getResources(), true /* force */);
-        }
-
         if ((diff & (CONFIG_ORIENTATION | CONFIG_SCREEN_SIZE)) != 0) {
             onIdpChanged(mDeviceProfile.inv);
         }
@@ -603,10 +607,9 @@
         if (info.container >= 0) {
             View folderIcon = getWorkspace().getHomescreenIconByItemId(info.container);
             if (folderIcon instanceof FolderIcon && folderIcon.getTag() instanceof FolderInfo) {
-                FolderIconPreviewVerifier verifier =
-                        new FolderIconPreviewVerifier(getDeviceProfile().inv);
-                verifier.setFolderInfo((FolderInfo) folderIcon.getTag());
-                if (verifier.isItemInPreview(info.rank)) {
+                if (new FolderGridOrganizer(getDeviceProfile().inv)
+                        .setFolderInfo((FolderInfo) folderIcon.getTag())
+                        .isItemInPreview(info.rank)) {
                     folderIcon.invalidate();
                 }
             }
@@ -646,7 +649,8 @@
                             .getLauncherAppWidgetInfo(widgetId);
                     if (provider != null) {
                         new WidgetAddFlowHandler(provider)
-                                .startConfigActivity(this, widgetInfo, REQUEST_RECONFIGURE_APPWIDGET);
+                                .startConfigActivity(this, widgetInfo,
+                                        REQUEST_RECONFIGURE_APPWIDGET);
                     }
                 }
                 break;
@@ -834,7 +838,8 @@
         }
     }
 
-    @Thunk void completeTwoStageWidgetDrop(
+    @Thunk
+    void completeTwoStageWidgetDrop(
             final int resultCode, final int appWidgetId, final PendingRequestArgs requestArgs) {
         CellLayout cellLayout = mWorkspace.getScreenWithId(requestArgs.screenId);
         Runnable onCompleteRunnable = null;
@@ -931,7 +936,7 @@
         int containerType = mStateManager.getState().containerType;
         if (containerType == ContainerType.WORKSPACE && mWorkspace != null) {
             getUserEventDispatcher().logActionCommand(command,
-                containerType, -1, mWorkspace.isOverlayShown() ? -1 : 0);
+                    containerType, -1, mWorkspace.isOverlayShown() ? -1 : 0);
         } else {
             getUserEventDispatcher().logActionCommand(command, containerType, -1);
         }
@@ -1060,7 +1065,8 @@
             mStateManager.goToState(state, false /* animated */);
         }
 
-        PendingRequestArgs requestArgs = savedState.getParcelable(RUNTIME_STATE_PENDING_REQUEST_ARGS);
+        PendingRequestArgs requestArgs = savedState.getParcelable(
+                RUNTIME_STATE_PENDING_REQUEST_ARGS);
         if (requestArgs != null) {
             setWaitingForResult(requestArgs);
         }
@@ -1130,8 +1136,7 @@
      * Creates a view representing a shortcut inflated from the specified resource.
      *
      * @param parent The group the shortcut belongs to.
-     * @param info The data structure describing the shortcut.
-     *
+     * @param info   The data structure describing the shortcut.
      * @return A View inflated from layoutResId.
      */
     public View createShortcut(ViewGroup parent, WorkspaceItemInfo info) {
@@ -1233,7 +1238,8 @@
      *
      * @param appWidgetId The app widget id
      */
-    @Thunk void completeAddAppWidget(int appWidgetId, ItemInfo itemInfo,
+    @Thunk
+    void completeAddAppWidget(int appWidgetId, ItemInfo itemInfo,
             AppWidgetHostView hostView, LauncherAppWidgetProviderInfo appWidgetInfo) {
 
         if (appWidgetInfo == null) {
@@ -1351,7 +1357,9 @@
         return mSharedPrefs;
     }
 
-    public int getOrientation() { return mOldConfig.orientation; }
+    public int getOrientation() {
+        return mOldConfig.orientation;
+    }
 
     @Override
     protected void onNewIntent(Intent intent) {
@@ -1435,9 +1443,10 @@
             outState.remove(RUNTIME_STATE_WIDGET_PANEL);
         }
 
-        // We close any open folders and shortcut containers since they will not be re-opened,
+        // We close any open folders and shortcut containers that are not safe for rebind,
         // and we need to make sure this state is reflected.
-        AbstractFloatingView.closeAllOpenViews(this, false);
+        AbstractFloatingView.closeOpenViews(this, false, TYPE_ALL & ~TYPE_REBIND_SAFE);
+        finishAutoCancelActionMode();
 
         if (mPendingRequestArgs != null) {
             outState.putParcelable(RUNTIME_STATE_PENDING_REQUEST_ARGS, mPendingRequestArgs);
@@ -1574,7 +1583,8 @@
 
     void addAppWidgetImpl(int appWidgetId, ItemInfo info,
             AppWidgetHostView boundWidget, WidgetAddFlowHandler addFlowHandler, int delay) {
-        if (!addFlowHandler.startConfigActivity(this, appWidgetId, info, REQUEST_CREATE_APPWIDGET)) {
+        if (!addFlowHandler.startConfigActivity(this, appWidgetId, info,
+                REQUEST_CREATE_APPWIDGET)) {
             // If the configuration flow was not started, add the widget
 
             Runnable onComplete = new Runnable() {
@@ -1584,7 +1594,8 @@
                     mStateManager.goToState(NORMAL, SPRING_LOADED_EXIT_DELAY);
                 }
             };
-            completeAddAppWidget(appWidgetId, info, boundWidget, addFlowHandler.getProviderInfo(this));
+            completeAddAppWidget(appWidgetId, info, boundWidget,
+                    addFlowHandler.getProviderInfo(this));
             mWorkspace.removeExtraEmptyScreenDelayed(true, onComplete, delay, false);
         }
     }
@@ -1610,7 +1621,7 @@
                 break;
             default:
                 throw new IllegalStateException("Unknown item type: " + info.itemType);
-            }
+        }
     }
 
     /**
@@ -1668,7 +1679,7 @@
     FolderIcon addFolder(CellLayout layout, int container, final int screenId, int cellX,
             int cellY) {
         final FolderInfo folderInfo = new FolderInfo();
-        folderInfo.title = getText(R.string.folder_name);
+        folderInfo.title = "";
 
         // Update the model
         getModelWriter().addItemToDatabase(folderInfo, container, screenId, cellX, cellY);
@@ -1722,8 +1733,6 @@
         return true;
     }
 
-
-
     @Override
     public boolean dispatchKeyEvent(KeyEvent event) {
         return (event.getKeyCode() == KeyEvent.KEYCODE_HOME) || super.dispatchKeyEvent(event);
@@ -1787,7 +1796,7 @@
 
     @Override
     public int getCurrentState() {
-        if(mStateManager.getState() == LauncherState.ALL_APPS) {
+        if (mStateManager.getState() == LauncherState.ALL_APPS) {
             return StatsLogUtils.LAUNCHER_STATE_ALLAPPS;
         } else if (mStateManager.getState() == OVERVIEW) {
             return StatsLogUtils.LAUNCHER_STATE_OVERVIEW;
@@ -1922,8 +1931,7 @@
         // Floating panels (except the full widget sheet) are associated with individual icons. If
         // we are starting a fresh bind, close all such panels as all the icons are about
         // to go away.
-        AbstractFloatingView.closeOpenViews(this, true,
-                AbstractFloatingView.TYPE_ALL & ~AbstractFloatingView.TYPE_REBIND_SAFE);
+        AbstractFloatingView.closeOpenViews(this, true, TYPE_ALL & ~TYPE_REBIND_SAFE);
 
         setWorkspaceLoading(true);
 
@@ -2051,7 +2059,7 @@
                     throw new RuntimeException("Invalid Item Type");
             }
 
-             /*
+            /*
              * Remove colliding items.
              */
             if (item.container == LauncherSettings.Favorites.CONTAINER_DESKTOP) {
@@ -2123,6 +2131,14 @@
     }
 
     private View inflateAppWidget(LauncherAppWidgetInfo item) {
+        if (item.hasOptionFlag(LauncherAppWidgetInfo.OPTION_SEARCH_WIDGET)) {
+            item.providerName = QsbContainerView.getSearchComponentName(this);
+            if (item.providerName == null) {
+                getModelWriter().deleteItemFromDatabase(item);
+                return null;
+            }
+        }
+
         if (mIsSafeModeEnabled) {
             PendingAppWidgetHostView view =
                     new PendingAppWidgetHostView(this, item, mIconCache, true);
@@ -2169,7 +2185,8 @@
                     pendingInfo.spanY = item.spanY;
                     pendingInfo.minSpanX = item.minSpanX;
                     pendingInfo.minSpanY = item.minSpanY;
-                    Bundle options = WidgetHostViewLoader.getDefaultOptionsForWidget(this, pendingInfo);
+                    Bundle options = WidgetHostViewLoader.getDefaultOptionsForWidget(this,
+                            pendingInfo);
 
                     boolean isDirectConfig =
                             item.hasRestoreFlag(LauncherAppWidgetInfo.FLAG_DIRECT_CONFIG);
@@ -2344,7 +2361,7 @@
      *
      * Implementation of the method from LauncherModel.Callbacks.
      */
-    public void bindAllApplications(ArrayList<AppInfo> apps) {
+    public void bindAllApplications(AppInfo[] apps) {
         mAppsView.getAppsStore().setApps(apps);
     }
 
@@ -2357,16 +2374,6 @@
         mPopupDataProvider.setDeepShortcutMap(deepShortcutMapCopy);
     }
 
-    /**
-     * A package was updated.
-     *
-     * Implementation of the method from LauncherModel.Callbacks.
-     */
-    @Override
-    public void bindAppsAddedOrUpdated(ArrayList<AppInfo> apps) {
-        mAppsView.getAppsStore().addOrUpdateApps(apps);
-    }
-
     @Override
     public void bindPromiseAppProgressUpdated(PromiseAppInfo app) {
         mAppsView.getAppsStore().updatePromiseAppProgress(app);
@@ -2414,11 +2421,6 @@
     }
 
     @Override
-    public void bindAppInfosRemoved(final ArrayList<AppInfo> appInfos) {
-        mAppsView.getAppsStore().removeApps(appInfos);
-    }
-
-    @Override
     public void bindAllWidgets(final ArrayList<WidgetListRowEntry> allWidgets) {
         mPopupDataProvider.setAllWidgets(allWidgets);
     }
@@ -2531,8 +2533,8 @@
                     if (focusedView instanceof BubbleTextView
                             && focusedView.getTag() instanceof ItemInfo
                             && mAccessibilityDelegate.performAction(focusedView,
-                                    (ItemInfo) focusedView.getTag(),
-                                    LauncherAccessibilityDelegate.DEEP_SHORTCUTS)) {
+                            (ItemInfo) focusedView.getTag(),
+                            LauncherAccessibilityDelegate.DEEP_SHORTCUTS)) {
                         PopupContainerWithArrow.getOpen(this).requestFocus();
                         return true;
                     }
@@ -2577,6 +2579,12 @@
         return (Launcher) fromContext(context);
     }
 
+    @Override
+    public void returnToHomescreen() {
+        super.returnToHomescreen();
+        getStateManager().goToState(LauncherState.NORMAL);
+    }
+
     /**
      * Just a wrapper around the type cast to allow easier tracking of calls.
      */
diff --git a/src/com/android/launcher3/LauncherAppWidgetInfo.java b/src/com/android/launcher3/LauncherAppWidgetInfo.java
index 051846c..b824301 100644
--- a/src/com/android/launcher3/LauncherAppWidgetInfo.java
+++ b/src/com/android/launcher3/LauncherAppWidgetInfo.java
@@ -29,6 +29,9 @@
  */
 public class LauncherAppWidgetInfo extends ItemInfo {
 
+    public static final int OPTION_SEARCH_WIDGET = 1;
+
+
     public static final int RESTORE_COMPLETED = 0;
 
     /**
@@ -97,6 +100,11 @@
     public Intent bindOptions;
 
     /**
+     * Widget options
+     */
+    public int options;
+
+    /**
      * Nonnull for pending widgets. We use this to get the icon and title for the widget.
      */
     public PackageItemInfo pendingItemInfo;
@@ -137,6 +145,7 @@
         writer.put(LauncherSettings.Favorites.APPWIDGET_ID, appWidgetId)
                 .put(LauncherSettings.Favorites.APPWIDGET_PROVIDER, providerName.flattenToString())
                 .put(LauncherSettings.Favorites.RESTORED, restoreStatus)
+                .put(LauncherSettings.Favorites.OPTIONS, options)
                 .put(LauncherSettings.Favorites.INTENT, bindOptions);
     }
 
@@ -164,4 +173,13 @@
     public final boolean hasRestoreFlag(int flag) {
         return (restoreStatus & flag) == flag;
     }
+
+    /**
+     * returns if widget options include an option or not
+     * @param option
+     * @return
+     */
+    public final boolean hasOptionFlag(int option) {
+        return (options & option) != 0;
+    }
 }
diff --git a/src/com/android/launcher3/LauncherModel.java b/src/com/android/launcher3/LauncherModel.java
index d79f5d5..da9617a 100644
--- a/src/com/android/launcher3/LauncherModel.java
+++ b/src/com/android/launcher3/LauncherModel.java
@@ -18,28 +18,31 @@
 
 import static com.android.launcher3.LauncherAppState.ACTION_FORCE_ROLOAD;
 import static com.android.launcher3.config.FeatureFlags.IS_DOGFOOD_BUILD;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
 
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ShortcutInfo;
-import android.os.Handler;
-import android.os.HandlerThread;
-import android.os.Looper;
 import android.os.Process;
 import android.os.UserHandle;
 import android.text.TextUtils;
 import android.util.Log;
 import android.util.Pair;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.compat.PackageInstallerCompat.PackageInstallInfo;
 import com.android.launcher3.compat.UserManagerCompat;
 import com.android.launcher3.icons.IconCache;
 import com.android.launcher3.icons.LauncherIcons;
 import com.android.launcher3.model.AddWorkspaceItemsTask;
+import com.android.launcher3.model.AllAppsList;
 import com.android.launcher3.model.BaseModelUpdateTask;
 import com.android.launcher3.model.BgDataModel;
+import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.model.CacheDataUpdatedTask;
 import com.android.launcher3.model.LoaderResults;
 import com.android.launcher3.model.LoaderTask;
@@ -49,28 +52,20 @@
 import com.android.launcher3.model.ShortcutsChangedTask;
 import com.android.launcher3.model.UserLockStateChangedTask;
 import com.android.launcher3.shortcuts.DeepShortcutManager;
-import com.android.launcher3.util.ComponentKey;
-import com.android.launcher3.util.IntArray;
-import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.PackageUserKey;
 import com.android.launcher3.util.Preconditions;
 import com.android.launcher3.util.Thunk;
-import com.android.launcher3.util.ViewOnDrawExecutor;
-import com.android.launcher3.widget.WidgetListRowEntry;
 
 import java.io.FileDescriptor;
 import java.io.PrintWriter;
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.concurrent.CancellationException;
 import java.util.concurrent.Executor;
 import java.util.function.Supplier;
 
-import androidx.annotation.Nullable;
-
 /**
  * Maintains in-memory state of the Launcher. It is expected that there should be only one
  * LauncherModel object held in a static. Also provide APIs for updating the database state
@@ -82,21 +77,12 @@
 
     static final String TAG = "Launcher.Model";
 
-    private final MainThreadExecutor mUiExecutor = new MainThreadExecutor();
     @Thunk final LauncherAppState mApp;
     @Thunk final Object mLock = new Object();
     @Thunk
     LoaderTask mLoaderTask;
     @Thunk boolean mIsLoaderTaskRunning;
 
-    @Thunk static final HandlerThread sWorkerThread = new HandlerThread("launcher-loader");
-    private static final Looper mWorkerLooper;
-    static {
-        sWorkerThread.start();
-        mWorkerLooper = sWorkerThread.getLooper();
-    }
-    @Thunk static final Handler sWorker = new Handler(mWorkerLooper);
-
     // Indicates whether the current model data is valid or not.
     // We start off with everything not loaded. After that, we assume that
     // our monitoring of the package manager provides all updates and we never
@@ -133,33 +119,6 @@
         }
     };
 
-    public interface Callbacks {
-        public void rebindModel();
-
-        public int getCurrentWorkspaceScreen();
-        public void clearPendingBinds();
-        public void startBinding();
-        public void bindItems(List<ItemInfo> shortcuts, boolean forceAnimateIcons);
-        public void bindScreens(IntArray orderedScreenIds);
-        public void finishFirstPageBind(ViewOnDrawExecutor executor);
-        public void finishBindingItems(int pageBoundFirst);
-        public void bindAllApplications(ArrayList<AppInfo> apps);
-        public void bindAppsAddedOrUpdated(ArrayList<AppInfo> apps);
-        public void preAddApps();
-        public void bindAppsAdded(IntArray newScreens,
-                ArrayList<ItemInfo> addNotAnimated, ArrayList<ItemInfo> addAnimated);
-        public void bindPromiseAppProgressUpdated(PromiseAppInfo app);
-        public void bindWorkspaceItemsChanged(ArrayList<WorkspaceItemInfo> updated);
-        public void bindWidgetsRestored(ArrayList<LauncherAppWidgetInfo> widgets);
-        public void bindRestoreItemsChange(HashSet<ItemInfo> updates);
-        public void bindWorkspaceComponentsRemoved(ItemInfoMatcher matcher);
-        public void bindAppInfosRemoved(ArrayList<AppInfo> appInfos);
-        public void bindAllWidgets(ArrayList<WidgetListRowEntry> widgets);
-        public void onPageBoundSynchronously(int page);
-        public void executeOnNextDraw(ViewOnDrawExecutor executor);
-        public void bindDeepShortcutMap(HashMap<ComponentKey, Integer> deepShortcutMap);
-    }
-
     LauncherModel(LauncherAppState app, IconCache iconCache, AppFilter appFilter) {
         mApp = app;
         mBgAllAppsList = new AllAppsList(iconCache, appFilter);
@@ -349,7 +308,7 @@
             if (mCallbacks != null && mCallbacks.get() != null) {
                 final Callbacks oldCallbacks = mCallbacks.get();
                 // Clear any pending bind-runnables from the synchronized load process.
-                mUiExecutor.execute(oldCallbacks::clearPendingBinds);
+                MAIN_EXECUTOR.execute(oldCallbacks::clearPendingBinds);
 
                 // If there is already one running, tell it to stop.
                 stopLoader();
@@ -393,7 +352,7 @@
 
             // Always post the loader task, instead of running directly (even on same thread) so
             // that we exit any nested synchronized blocks
-            sWorker.post(mLoaderTask);
+            MODEL_EXECUTOR.post(mLoaderTask);
         }
     }
 
@@ -411,16 +370,7 @@
             @Override
             public void execute(LauncherAppState app, BgDataModel dataModel, AllAppsList apps) {
                 apps.addPromiseApp(app.getContext(), sessionInfo);
-                if (!apps.added.isEmpty()) {
-                    final ArrayList<AppInfo> arrayList = new ArrayList<>(apps.added);
-                    apps.added.clear();
-                    scheduleCallbackTask(new CallbackTask() {
-                        @Override
-                        public void execute(Callbacks callbacks) {
-                            callbacks.bindAppsAddedOrUpdated(arrayList);
-                        }
-                    });
-                }
+                bindApplicationsIfNeeded();
             }
         });
     }
@@ -469,8 +419,8 @@
      * use partial updates similar to {@link UserManagerCompat}
      */
     public void refreshShortcutsIfRequired() {
-        sWorker.removeCallbacks(mShortcutPermissionCheckRunnable);
-        sWorker.post(mShortcutPermissionCheckRunnable);
+        MODEL_EXECUTOR.getHandler().removeCallbacks(mShortcutPermissionCheckRunnable);
+        MODEL_EXECUTOR.post(mShortcutPermissionCheckRunnable);
     }
 
     /**
@@ -497,14 +447,8 @@
     }
 
     public void enqueueModelUpdateTask(ModelUpdateTask task) {
-        task.init(mApp, this, sBgDataModel, mBgAllAppsList, mUiExecutor);
-
-        if (sWorkerThread.getThreadId() == Process.myTid()) {
-            task.run();
-        } else {
-            // If we are not on the worker thread, then post to the worker handler
-            sWorker.post(task);
-        }
+        task.init(mApp, this, sBgDataModel, mBgAllAppsList, MAIN_EXECUTOR);
+        MODEL_EXECUTOR.execute(task);
     }
 
     /**
@@ -580,14 +524,4 @@
         return mCallbacks != null ? mCallbacks.get() : null;
     }
 
-    /**
-     * @return the looper for the worker thread which can be used to start background tasks.
-     */
-    public static Looper getWorkerLooper() {
-        return mWorkerLooper;
-    }
-
-    public static void setWorkerPriority(final int priority) {
-        Process.setThreadPriority(sWorkerThread.getThreadId(), priority);
-    }
 }
diff --git a/src/com/android/launcher3/LauncherProvider.java b/src/com/android/launcher3/LauncherProvider.java
index 6ad5c36..6081300 100644
--- a/src/com/android/launcher3/LauncherProvider.java
+++ b/src/com/android/launcher3/LauncherProvider.java
@@ -33,7 +33,6 @@
 import android.content.Intent;
 import android.content.OperationApplicationException;
 import android.content.SharedPreferences;
-import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.pm.ProviderInfo;
 import android.content.res.Resources;
 import android.database.Cursor;
@@ -50,7 +49,6 @@
 import android.os.Message;
 import android.os.Process;
 import android.os.UserHandle;
-import android.os.UserManager;
 import android.provider.BaseColumns;
 import android.provider.Settings;
 import android.text.TextUtils;
@@ -70,6 +68,7 @@
 import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.NoLocaleSQLiteHelper;
+import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.Preconditions;
 import com.android.launcher3.util.Thunk;
 
@@ -77,7 +76,6 @@
 
 import java.io.File;
 import java.io.FileDescriptor;
-import java.io.IOException;
 import java.io.InputStream;
 import java.io.PrintWriter;
 import java.io.StringReader;
@@ -873,7 +871,7 @@
                         continue;
                     }
 
-                    if (!Utilities.isLauncherAppTarget(intent)) {
+                    if (!PackageManagerHelper.isLauncherAppTarget(intent)) {
                         continue;
                     }
 
diff --git a/src/com/android/launcher3/LauncherSettings.java b/src/com/android/launcher3/LauncherSettings.java
index e248ba0..242e099 100644
--- a/src/com/android/launcher3/LauncherSettings.java
+++ b/src/com/android/launcher3/LauncherSettings.java
@@ -122,11 +122,13 @@
          */
         public static final int CONTAINER_DESKTOP = -100;
         public static final int CONTAINER_HOTSEAT = -101;
+        public static final int CONTAINER_PREDICTION = -102;
 
         static final String containerToString(int container) {
             switch (container) {
                 case CONTAINER_DESKTOP: return "desktop";
                 case CONTAINER_HOTSEAT: return "hotseat";
+                case CONTAINER_PREDICTION: return "prediction";
                 default: return String.valueOf(container);
             }
         }
diff --git a/src/com/android/launcher3/MainThreadExecutor.java b/src/com/android/launcher3/MainThreadExecutor.java
deleted file mode 100644
index 5094682..0000000
--- a/src/com/android/launcher3/MainThreadExecutor.java
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License
- */
-
-package com.android.launcher3;
-
-import android.os.Looper;
-
-import com.android.launcher3.util.LooperExecutor;
-
-/**
- * An executor service that executes its tasks on the main thread.
- *
- * Shutting down this executor is not supported.
- */
-public class MainThreadExecutor extends LooperExecutor {
-
-    public MainThreadExecutor() {
-        super(Looper.getMainLooper());
-    }
-}
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index bbb3915..f9a326f 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -1289,6 +1289,10 @@
         if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) {
             switch (event.getAction()) {
                 case MotionEvent.ACTION_SCROLL: {
+                    Launcher launcher = Launcher.getLauncher(getContext());
+                    if (launcher != null) {
+                        AbstractFloatingView.closeAllOpenViews(launcher);
+                    }
                     // Handle mouse (or ext. device) by shifting the page depending on the scroll
                     final float vscroll;
                     final float hscroll;
@@ -1299,6 +1303,9 @@
                         vscroll = -event.getAxisValue(MotionEvent.AXIS_VSCROLL);
                         hscroll = event.getAxisValue(MotionEvent.AXIS_HSCROLL);
                     }
+                    if (Math.abs(vscroll) > Math.abs(hscroll) && !isVerticalScrollable()) {
+                        return true;
+                    }
                     if (hscroll != 0 || vscroll != 0) {
                         boolean isForwardScroll = mIsRtl ? (hscroll < 0 || vscroll < 0)
                                                          : (hscroll > 0 || vscroll > 0);
@@ -1315,6 +1322,10 @@
         return super.onGenericMotionEvent(event);
     }
 
+    protected boolean isVerticalScrollable() {
+        return true;
+    }
+
     private void acquireVelocityTrackerAndAddMovement(MotionEvent ev) {
         if (mVelocityTracker == null) {
             mVelocityTracker = VelocityTracker.obtain();
diff --git a/src/com/android/launcher3/Partner.java b/src/com/android/launcher3/Partner.java
index 380078b..af5402a 100644
--- a/src/com/android/launcher3/Partner.java
+++ b/src/com/android/launcher3/Partner.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3;
 
+import static com.android.launcher3.util.PackageManagerHelper.findSystemApk;
+
 import android.content.pm.PackageManager;
 import android.content.res.Resources;
 import android.util.DisplayMetrics;
@@ -59,7 +61,7 @@
      */
     public static synchronized Partner get(PackageManager pm) {
         if (!sSearched) {
-            Pair<String, Resources> apkInfo = Utilities.findSystemApk(ACTION_PARTNER_CUSTOMIZATION, pm);
+            Pair<String, Resources> apkInfo = findSystemApk(ACTION_PARTNER_CUSTOMIZATION, pm);
             if (apkInfo != null) {
                 sPartner = new Partner(apkInfo.first, apkInfo.second);
             }
diff --git a/src/com/android/launcher3/SessionCommitReceiver.java b/src/com/android/launcher3/SessionCommitReceiver.java
index b4078ee..6853bf6 100644
--- a/src/com/android/launcher3/SessionCommitReceiver.java
+++ b/src/com/android/launcher3/SessionCommitReceiver.java
@@ -22,7 +22,6 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.pm.ApplicationInfo;
 import android.content.pm.LauncherActivityInfo;
 import android.content.pm.PackageInstaller;
 import android.content.pm.PackageInstaller.SessionInfo;
@@ -39,6 +38,7 @@
 import android.util.Log;
 
 import com.android.launcher3.compat.LauncherAppsCompat;
+import com.android.launcher3.util.Executors;
 import com.android.launcher3.compat.PackageInstallerCompat;
 
 import java.util.List;
@@ -133,7 +133,7 @@
             // grid.
             prefs.edit().putBoolean(ADD_ICON_PREFERENCE_KEY, true).apply();
         } else if (!prefs.contains(ADD_ICON_PREFERENCE_INITIALIZED_KEY)) {
-            new PrefInitTask(context).executeOnExecutor(Utilities.THREAD_POOL_EXECUTOR);
+            new PrefInitTask(context).executeOnExecutor(Executors.THREAD_POOL_EXECUTOR);
         }
     }
 
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index ba122f9..6ddebe7 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -24,15 +24,9 @@
 import android.app.Person;
 import android.app.WallpaperManager;
 import android.content.BroadcastReceiver;
-import android.content.ComponentName;
 import android.content.Context;
-import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.pm.ApplicationInfo;
 import android.content.pm.LauncherActivityInfo;
-import android.content.pm.PackageInfo;
-import android.content.pm.PackageManager;
-import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.pm.ResolveInfo;
 import android.content.pm.ShortcutInfo;
 import android.content.res.Resources;
@@ -47,7 +41,6 @@
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.InsetDrawable;
 import android.os.Build;
-import android.os.Bundle;
 import android.os.DeadObjectException;
 import android.os.Handler;
 import android.os.Message;
@@ -60,7 +53,6 @@
 import android.text.style.TtsSpan;
 import android.util.DisplayMetrics;
 import android.util.Log;
-import android.util.Pair;
 import android.util.TypedValue;
 import android.view.MotionEvent;
 import android.view.View;
@@ -69,7 +61,6 @@
 
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.compat.ShortcutConfigActivityInfo;
-import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.dragndrop.FolderAdaptiveIcon;
 import com.android.launcher3.graphics.RotationMode;
 import com.android.launcher3.graphics.TintedDrawableSpan;
@@ -81,17 +72,10 @@
 import com.android.launcher3.views.Transposable;
 import com.android.launcher3.widget.PendingAddShortcutInfo;
 
-import java.io.Closeable;
-import java.io.IOException;
 import java.lang.reflect.Method;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Locale;
-import java.util.StringTokenizer;
-import java.util.concurrent.Executor;
-import java.util.concurrent.LinkedBlockingQueue;
-import java.util.concurrent.ThreadPoolExecutor;
-import java.util.concurrent.TimeUnit;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -124,8 +108,6 @@
     public static final boolean ATLEAST_OREO =
             Build.VERSION.SDK_INT >= Build.VERSION_CODES.O;
 
-    public static final int SINGLE_FRAME_MS = 16;
-
     /**
      * Set on a motion event dispatched from the nav bar. See {@link MotionEvent#setEdgeFlags(int)}.
      */
@@ -148,18 +130,6 @@
     public static final String EXTRA_WALLPAPER_OFFSET = "com.android.launcher3.WALLPAPER_OFFSET";
     public static final String EXTRA_WALLPAPER_FLAVOR = "com.android.launcher3.WALLPAPER_FLAVOR";
 
-    // These values are same as that in {@link AsyncTask}.
-    private static final int CPU_COUNT = Runtime.getRuntime().availableProcessors();
-    private static final int CORE_POOL_SIZE = CPU_COUNT + 1;
-    private static final int MAXIMUM_POOL_SIZE = CPU_COUNT * 2 + 1;
-    private static final int KEEP_ALIVE = 1;
-    /**
-     * An {@link Executor} to be used with async task with no limit on the queue size.
-     */
-    public static final Executor THREAD_POOL_EXECUTOR = new ThreadPoolExecutor(
-            CORE_POOL_SIZE, MAXIMUM_POOL_SIZE, KEEP_ALIVE,
-            TimeUnit.SECONDS, new LinkedBlockingQueue<>());
-
     public static boolean IS_RUNNING_IN_TEST_HARNESS =
                     ActivityManager.isRunningInTestHarness();
 
@@ -247,7 +217,6 @@
         return scale;
     }
 
-
     /**
      * Inverse of {@link #getDescendantCoordRelativeToAncestor(View, View, float[], boolean)}.
      */
@@ -383,53 +352,6 @@
         return min + (value * (max - min));
     }
 
-    public static boolean isSystemApp(Context context, Intent intent) {
-        PackageManager pm = context.getPackageManager();
-        ComponentName cn = intent.getComponent();
-        String packageName = null;
-        if (cn == null) {
-            ResolveInfo info = pm.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
-            if ((info != null) && (info.activityInfo != null)) {
-                packageName = info.activityInfo.packageName;
-            }
-        } else {
-            packageName = cn.getPackageName();
-        }
-        if (packageName != null) {
-            try {
-                PackageInfo info = pm.getPackageInfo(packageName, 0);
-                return (info != null) && (info.applicationInfo != null) &&
-                        ((info.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
-            } catch (NameNotFoundException e) {
-                return false;
-            }
-        } else {
-            return false;
-        }
-    }
-
-    /*
-     * Finds a system apk which had a broadcast receiver listening to a particular action.
-     * @param action intent action used to find the apk
-     * @return a pair of apk package name and the resources.
-     */
-    static Pair<String, Resources> findSystemApk(String action, PackageManager pm) {
-        final Intent intent = new Intent(action);
-        for (ResolveInfo info : pm.queryBroadcastReceivers(intent, 0)) {
-            if (info.activityInfo != null &&
-                    (info.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
-                final String packageName = info.activityInfo.packageName;
-                try {
-                    final Resources res = pm.getResourcesForApplication(packageName);
-                    return Pair.create(packageName, res);
-                } catch (NameNotFoundException e) {
-                    Log.w(TAG, "Failed to find resources for " + packageName);
-                }
-            }
-        }
-        return null;
-    }
-
     /**
      * Trims the string, removing all whitespace at the beginning and end of the string.
      * Non-breaking whitespaces are also removed.
@@ -454,51 +376,10 @@
         return (int) Math.ceil(fm.bottom - fm.top);
     }
 
-    /**
-     * Convenience println with multiple args.
-     */
-    public static void println(String key, Object... args) {
-        StringBuilder b = new StringBuilder();
-        b.append(key);
-        b.append(": ");
-        boolean isFirstArgument = true;
-        for (Object arg : args) {
-            if (isFirstArgument) {
-                isFirstArgument = false;
-            } else {
-                b.append(", ");
-            }
-            b.append(arg);
-        }
-        System.out.println(b.toString());
-    }
-
     public static boolean isRtl(Resources res) {
         return res.getConfiguration().getLayoutDirection() == View.LAYOUT_DIRECTION_RTL;
     }
 
-    /**
-     * Returns true if the intent is a valid launch intent for a launcher activity of an app.
-     * This is used to identify shortcuts which are different from the ones exposed by the
-     * applications' manifest file.
-     *
-     * @param launchIntent The intent that will be launched when the shortcut is clicked.
-     */
-    public static boolean isLauncherAppTarget(Intent launchIntent) {
-        if (launchIntent != null
-                && Intent.ACTION_MAIN.equals(launchIntent.getAction())
-                && launchIntent.getComponent() != null
-                && launchIntent.getCategories() != null
-                && launchIntent.getCategories().size() == 1
-                && launchIntent.hasCategory(Intent.CATEGORY_LAUNCHER)
-                && TextUtils.isEmpty(launchIntent.getDataString())) {
-            // An app target can either have no extra or have ItemInfo.EXTRA_PROFILE.
-            Bundle extras = launchIntent.getExtras();
-            return extras == null || extras.keySet().isEmpty();
-        }
-        return false;
-    }
-
     public static float dpiFromPx(int size, DisplayMetrics metrics){
         float densityRatio = (float) metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT;
         return (size / densityRatio);
@@ -601,18 +482,6 @@
         return context.getSystemService(WallpaperManager.class).isSetWallpaperAllowed();
     }
 
-    public static void closeSilently(Closeable c) {
-        if (c != null) {
-            try {
-                c.close();
-            } catch (IOException e) {
-                if (FeatureFlags.IS_DOGFOOD_BUILD) {
-                    Log.d(TAG, "Error closing", e);
-                }
-            }
-        }
-    }
-
     public static boolean isBinderSizeError(Exception e) {
         return e.getCause() instanceof TransactionTooLargeException
                 || e.getCause() instanceof DeadObjectException;
@@ -727,25 +596,6 @@
         }
     }
 
-    public static int[] getIntArrayFromString(String tokenized) {
-        StringTokenizer tokenizer = new StringTokenizer(tokenized, ",");
-        int[] array = new int[tokenizer.countTokens()];
-        int count = 0;
-        while (tokenizer.hasMoreTokens()) {
-            array[count] = Integer.parseInt(tokenizer.nextToken().trim());
-            count++;
-        }
-        return array;
-    }
-
-    public static String getStringFromIntArray(int[] array) {
-        StringBuilder str = new StringBuilder();
-        for (int value : array) {
-            str.append(value).append(",");
-        }
-        return str.toString();
-    }
-
     public static float squaredHypot(float x, float y) {
         return x * x + y * y;
     }
diff --git a/src/com/android/launcher3/WidgetPreviewLoader.java b/src/com/android/launcher3/WidgetPreviewLoader.java
index 6d1bc1a..003bcc1 100644
--- a/src/com/android/launcher3/WidgetPreviewLoader.java
+++ b/src/com/android/launcher3/WidgetPreviewLoader.java
@@ -1,5 +1,8 @@
 package com.android.launcher3;
 
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+
 import android.content.ComponentName;
 import android.content.ContentValues;
 import android.content.Context;
@@ -23,21 +26,23 @@
 import android.graphics.drawable.Drawable;
 import android.os.AsyncTask;
 import android.os.CancellationSignal;
-import android.os.Handler;
 import android.os.Process;
 import android.os.UserHandle;
 import android.util.Log;
 import android.util.LongSparseArray;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.compat.AppWidgetManagerCompat;
 import com.android.launcher3.compat.ShortcutConfigActivityInfo;
 import com.android.launcher3.compat.UserManagerCompat;
 import com.android.launcher3.icons.GraphicsUtils;
+import com.android.launcher3.icons.IconCache;
 import com.android.launcher3.icons.LauncherIcons;
 import com.android.launcher3.icons.ShadowGenerator;
-import com.android.launcher3.icons.IconCache;
 import com.android.launcher3.model.WidgetItem;
 import com.android.launcher3.util.ComponentKey;
+import com.android.launcher3.util.Executors;
 import com.android.launcher3.util.PackageUserKey;
 import com.android.launcher3.util.Preconditions;
 import com.android.launcher3.util.SQLiteCacheHelper;
@@ -50,11 +55,8 @@
 import java.util.HashSet;
 import java.util.Set;
 import java.util.WeakHashMap;
-import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutionException;
 
-import androidx.annotation.Nullable;
-
 public class WidgetPreviewLoader {
 
     private static final String TAG = "WidgetPreviewLoader";
@@ -68,23 +70,18 @@
      * Note: synchronized block used for this variable is expensive and the block should always
      * be posted to a background thread.
      */
-    @Thunk final Set<Bitmap> mUnusedBitmaps =
-            Collections.newSetFromMap(new WeakHashMap<Bitmap, Boolean>());
+    @Thunk final Set<Bitmap> mUnusedBitmaps = Collections.newSetFromMap(new WeakHashMap<>());
 
     private final Context mContext;
     private final IconCache mIconCache;
     private final UserManagerCompat mUserManager;
     private final CacheDb mDb;
 
-    private final MainThreadExecutor mMainThreadExecutor = new MainThreadExecutor();
-    @Thunk final Handler mWorkerHandler;
-
     public WidgetPreviewLoader(Context context, IconCache iconCache) {
         mContext = context;
         mIconCache = iconCache;
         mUserManager = UserManagerCompat.getInstance(context);
         mDb = new CacheDb(context);
-        mWorkerHandler = new Handler(LauncherModel.getWorkerLooper());
     }
 
     /**
@@ -99,7 +96,7 @@
         WidgetCacheKey key = new WidgetCacheKey(item.componentName, item.user, size);
 
         PreviewLoadTask task = new PreviewLoadTask(key, item, previewWidth, previewHeight, caller);
-        task.executeOnExecutor(Utilities.THREAD_POOL_EXECUTOR);
+        task.executeOnExecutor(Executors.THREAD_POOL_EXECUTOR);
 
         CancellationSignal signal = new CancellationSignal();
         signal.setOnCancelListener(task);
@@ -494,12 +491,7 @@
 
     private Drawable mutateOnMainThread(final Drawable drawable) {
         try {
-            return mMainThreadExecutor.submit(new Callable<Drawable>() {
-                @Override
-                public Drawable call() throws Exception {
-                    return drawable.mutate();
-                }
-            }).get();
+            return MAIN_EXECUTOR.submit(drawable::mutate).get();
         } catch (InterruptedException e) {
             Thread.currentThread().interrupt();
             throw new RuntimeException(e);
@@ -607,7 +599,7 @@
 
             // Write the generated preview to the DB in the worker thread
             if (mVersions != null) {
-                mWorkerHandler.post(new Runnable() {
+                MODEL_EXECUTOR.post(new Runnable() {
                     @Override
                     public void run() {
                         if (!isCancelled()) {
@@ -637,7 +629,7 @@
             // recycled set immediately. Otherwise, it will be recycled after the preview is written
             // to disk.
             if (preview != null) {
-                mWorkerHandler.post(new Runnable() {
+                MODEL_EXECUTOR.post(new Runnable() {
                     @Override
                     public void run() {
                         synchronized (mUnusedBitmaps) {
@@ -658,7 +650,7 @@
             // in the tasks's onCancelled() call, and if cancelled while the task is writing to
             // disk, it will be cancelled in the task's onPostExecute() call.
             if (mBitmapToRecycle != null) {
-                mWorkerHandler.post(new Runnable() {
+                MODEL_EXECUTOR.post(new Runnable() {
                     @Override
                     public void run() {
                         synchronized (mUnusedBitmaps) {
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 6612662..1b757d5 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -67,9 +67,9 @@
 import com.android.launcher3.accessibility.WorkspaceAccessibilityHelper;
 import com.android.launcher3.anim.AnimatorSetBuilder;
 import com.android.launcher3.anim.Interpolators;
-import com.android.launcher3.dot.FolderDotInfo;
 import com.android.launcher3.compat.AppWidgetManagerCompat;
 import com.android.launcher3.config.FeatureFlags;
+import com.android.launcher3.dot.FolderDotInfo;
 import com.android.launcher3.dragndrop.DragController;
 import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.dragndrop.DragOptions;
@@ -90,6 +90,7 @@
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action;
 import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Target;
+import com.android.launcher3.util.Executors;
 import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.IntSparseArrayMap;
@@ -1161,7 +1162,7 @@
     }
 
     protected void setWallpaperDimension() {
-        Utilities.THREAD_POOL_EXECUTOR.execute(new Runnable() {
+        Executors.THREAD_POOL_EXECUTOR.execute(new Runnable() {
             @Override
             public void run() {
                 final Point size = LauncherAppState.getIDP(getContext()).defaultWallpaperSize;
@@ -2532,22 +2533,22 @@
             View view;
 
             switch (info.itemType) {
-            case ITEM_TYPE_APPLICATION:
-            case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT:
-            case LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT:
-                if (info.container == NO_ID && info instanceof AppInfo) {
-                    // Came from all apps -- make a copy
-                    info = ((AppInfo) info).makeWorkspaceItem();
-                    d.dragInfo = info;
-                }
-                view = mLauncher.createShortcut(cellLayout, (WorkspaceItemInfo) info);
-                break;
-            case LauncherSettings.Favorites.ITEM_TYPE_FOLDER:
-                view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, cellLayout,
-                        (FolderInfo) info);
-                break;
-            default:
-                throw new IllegalStateException("Unknown item type: " + info.itemType);
+                case ITEM_TYPE_APPLICATION:
+                case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT:
+                case LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT:
+                    if (info instanceof AppInfo) {
+                        // Came from all apps -- make a copy
+                        info = ((AppInfo) info).makeWorkspaceItem();
+                        d.dragInfo = info;
+                    }
+                    view = mLauncher.createShortcut(cellLayout, (WorkspaceItemInfo) info);
+                    break;
+                case LauncherSettings.Favorites.ITEM_TYPE_FOLDER:
+                    view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, cellLayout,
+                            (FolderInfo) info);
+                    break;
+                default:
+                    throw new IllegalStateException("Unknown item type: " + info.itemType);
             }
 
             // First we find the cell nearest to point at which the item is
@@ -3104,7 +3105,7 @@
             ItemInfo info = (ItemInfo) item.getTag();
             if (recurse && info instanceof FolderInfo && item instanceof FolderIcon) {
                 FolderIcon folder = (FolderIcon) item;
-                ArrayList<View> folderChildren = folder.getFolder().getItemsInReadingOrder();
+                ArrayList<View> folderChildren = folder.getFolder().getIconsInReadingOrder();
                 // map over all the children in the folder
                 final int childCount = folderChildren.size();
                 for (int childIdx = 0; childIdx < childCount; childIdx++) {
diff --git a/src/com/android/launcher3/WorkspaceItemInfo.java b/src/com/android/launcher3/WorkspaceItemInfo.java
index 050a8be..1323588 100644
--- a/src/com/android/launcher3/WorkspaceItemInfo.java
+++ b/src/com/android/launcher3/WorkspaceItemInfo.java
@@ -221,4 +221,9 @@
         }
         return cn;
     }
+
+    @Override
+    public ItemInfoWithIcon clone() {
+        return new WorkspaceItemInfo(this);
+    }
 }
diff --git a/src/com/android/launcher3/allapps/AllAppsPagedView.java b/src/com/android/launcher3/allapps/AllAppsPagedView.java
index 69068c6..5b73940 100644
--- a/src/com/android/launcher3/allapps/AllAppsPagedView.java
+++ b/src/com/android/launcher3/allapps/AllAppsPagedView.java
@@ -81,4 +81,9 @@
     public boolean hasOverlappingRendering() {
         return false;
     }
+
+    @Override
+    protected boolean isVerticalScrollable() {
+        return false;
+    }
 }
diff --git a/src/com/android/launcher3/allapps/AllAppsStore.java b/src/com/android/launcher3/allapps/AllAppsStore.java
index ca8dbeb..c4b2f68 100644
--- a/src/com/android/launcher3/allapps/AllAppsStore.java
+++ b/src/com/android/launcher3/allapps/AllAppsStore.java
@@ -15,6 +15,9 @@
  */
 package com.android.launcher3.allapps;
 
+import static com.android.launcher3.AppInfo.COMPONENT_KEY_COMPARATOR;
+import static com.android.launcher3.AppInfo.EMPTY_ARRAY;
+
 import android.view.View;
 import android.view.ViewGroup;
 
@@ -26,8 +29,7 @@
 import com.android.launcher3.util.PackageUserKey;
 
 import java.util.ArrayList;
-import java.util.Collection;
-import java.util.HashMap;
+import java.util.Arrays;
 import java.util.List;
 import java.util.function.Consumer;
 import java.util.function.Predicate;
@@ -43,27 +45,33 @@
     public static final int DEFER_UPDATES_TEST = 1 << 1;
 
     private PackageUserKey mTempKey = new PackageUserKey(null, null);
-    private final HashMap<ComponentKey, AppInfo> mComponentToAppMap = new HashMap<>();
+    private AppInfo mTempInfo = new AppInfo();
+
+    private AppInfo[] mApps = EMPTY_ARRAY;
+
     private final List<OnUpdateListener> mUpdateListeners = new ArrayList<>();
     private final ArrayList<ViewGroup> mIconContainers = new ArrayList<>();
 
     private int mDeferUpdatesFlags = 0;
     private boolean mUpdatePending = false;
 
-    public Collection<AppInfo> getApps() {
-        return mComponentToAppMap.values();
+    public AppInfo[] getApps() {
+        return mApps;
     }
 
     /**
      * Sets the current set of apps.
      */
-    public void setApps(List<AppInfo> apps) {
-        mComponentToAppMap.clear();
-        addOrUpdateApps(apps);
+    public void setApps(AppInfo[] apps) {
+        mApps = apps;
+        notifyUpdate();
     }
 
     public AppInfo getApp(ComponentKey key) {
-        return mComponentToAppMap.get(key);
+        mTempInfo.componentName = key.componentName;
+        mTempInfo.user = key.user;
+        int index = Arrays.binarySearch(mApps, mTempInfo, COMPONENT_KEY_COMPARATOR);
+        return index < 0 ? null : mApps[index];
     }
 
     public void enableDeferUpdates(int flag) {
@@ -86,27 +94,6 @@
         return mDeferUpdatesFlags;
     }
 
-    /**
-     * Adds or updates existing apps in the list
-     */
-    public void addOrUpdateApps(List<AppInfo> apps) {
-        for (AppInfo app : apps) {
-            mComponentToAppMap.put(app.toComponentKey(), app);
-        }
-        notifyUpdate();
-    }
-
-    /**
-     * Removes some apps from the list.
-     */
-    public void removeApps(List<AppInfo> apps) {
-        for (AppInfo app : apps) {
-            mComponentToAppMap.remove(app.toComponentKey());
-        }
-        notifyUpdate();
-    }
-
-
     private void notifyUpdate() {
         if (mDeferUpdatesFlags != 0) {
             mUpdatePending = true;
diff --git a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
index 1369441..0c4be62 100644
--- a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
+++ b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
@@ -21,16 +21,13 @@
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.Utilities;
-import com.android.launcher3.compat.AlphabeticIndexCompat;
 import com.android.launcher3.shortcuts.DeepShortcutManager;
-import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.LabelComparator;
 
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -145,9 +142,7 @@
 
     // The of ordered component names as a result of a search query
     private ArrayList<ComponentKey> mSearchResults;
-    private HashMap<CharSequence, String> mCachedSectionNames = new HashMap<>();
     private AllAppsGridAdapter mAdapter;
-    private AlphabeticIndexCompat mIndexer;
     private AppInfoComparator mAppNameComparator;
     private final int mNumAppsPerRow;
     private int mNumAppRowsInAdapter;
@@ -156,7 +151,6 @@
     public AlphabeticalAppsList(Context context, AllAppsStore appsStore, boolean isWork) {
         mAllAppsStore = appsStore;
         mLauncher = Launcher.getLauncher(context);
-        mIndexer = new AlphabeticIndexCompat(context);
         mAppNameComparator = new AppInfoComparator(context);
         mIsWork = isWork;
         mNumAppsPerRow = mLauncher.getDeviceProfile().inv.numColumns;
@@ -263,7 +257,7 @@
             TreeMap<String, ArrayList<AppInfo>> sectionMap = new TreeMap<>(new LabelComparator());
             for (AppInfo info : mApps) {
                 // Add the section to the cache
-                String sectionName = getAndUpdateCachedSectionName(info.title);
+                String sectionName = info.sectionName;
 
                 // Add it to the mapping
                 ArrayList<AppInfo> sectionApps = sectionMap.get(sectionName);
@@ -279,12 +273,6 @@
             for (Map.Entry<String, ArrayList<AppInfo>> entry : sectionMap.entrySet()) {
                 mApps.addAll(entry.getValue());
             }
-        } else {
-            // Just compute the section headers for use below
-            for (AppInfo info : mApps) {
-                // Add the section to the cache
-                getAndUpdateCachedSectionName(info.title);
-            }
         }
 
         // Recompose the set of adapter items from the current set of apps
@@ -320,7 +308,7 @@
         // Recreate the filtered and sectioned apps (for convenience for the grid layout) from the
         // ordered set of sections
         for (AppInfo info : getFiltersAppInfos()) {
-            String sectionName = getAndUpdateCachedSectionName(info.title);
+            String sectionName = info.sectionName;
 
             // Create a new section if the section names do not match
             if (!sectionName.equals(lastSectionName)) {
@@ -428,18 +416,4 @@
         }
         return result;
     }
-
-    /**
-     * Returns the cached section name for the given title, recomputing and updating the cache if
-     * the title has no cached section name.
-     */
-    private String getAndUpdateCachedSectionName(CharSequence title) {
-        String sectionName = mCachedSectionNames.get(title);
-        if (sectionName == null) {
-            sectionName = mIndexer.computeSectionName(title);
-            mCachedSectionNames.put(title, sectionName);
-        }
-        return sectionName;
-    }
-
 }
diff --git a/src/com/android/launcher3/compat/AlphabeticIndexCompat.java b/src/com/android/launcher3/compat/AlphabeticIndexCompat.java
index dfdcc70..46c9006 100644
--- a/src/com/android/launcher3/compat/AlphabeticIndexCompat.java
+++ b/src/com/android/launcher3/compat/AlphabeticIndexCompat.java
@@ -3,7 +3,6 @@
 import android.content.Context;
 import android.icu.text.AlphabeticIndex;
 import android.os.LocaleList;
-import android.util.Log;
 
 import com.android.launcher3.Utilities;
 
@@ -12,28 +11,32 @@
 import androidx.annotation.NonNull;
 
 public class AlphabeticIndexCompat {
-    private static final String TAG = "AlphabeticIndexCompat";
 
     private static final String MID_DOT = "\u2219";
-    private final BaseIndex mBaseIndex;
     private final String mDefaultMiscLabel;
 
+    private final AlphabeticIndex.ImmutableIndex mBaseIndex;
+
     public AlphabeticIndexCompat(Context context) {
-        BaseIndex index = null;
+        this(context.getResources().getConfiguration().getLocales());
+    }
 
-        try {
-            index = new AlphabeticIndexVN(context);
-        } catch (Exception e) {
-            Log.d(TAG, "Unable to load the system index", e);
+    public AlphabeticIndexCompat(LocaleList locales) {
+        int localeCount = locales.size();
+
+        Locale primaryLocale = localeCount == 0 ? Locale.ENGLISH : locales.get(0);
+        AlphabeticIndex indexBuilder = new AlphabeticIndex(primaryLocale);
+        for (int i = 1; i < localeCount; i++) {
+            indexBuilder.addLabels(locales.get(i));
         }
+        indexBuilder.addLabels(Locale.ENGLISH);
+        mBaseIndex = indexBuilder.buildImmutableIndex();
 
-        mBaseIndex = index == null ? new BaseIndex() : index;
-
-        if (context.getResources().getConfiguration().locale
-                .getLanguage().equals(Locale.JAPANESE.getLanguage())) {
+        if (primaryLocale.getLanguage().equals(Locale.JAPANESE.getLanguage())) {
             // Japanese character 他 ("misc")
             mDefaultMiscLabel = "\u4ed6";
-            // TODO(winsonc, omakoto): We need to handle Japanese sections better, especially the kanji
+            // TODO(winsonc, omakoto): We need to handle Japanese sections better,
+            // especially the kanji
         } else {
             // Dot
             mDefaultMiscLabel = MID_DOT;
@@ -45,7 +48,7 @@
      */
     public String computeSectionName(@NonNull CharSequence cs) {
         String s = Utilities.trim(cs);
-        String sectionName = mBaseIndex.getBucketLabel(mBaseIndex.getBucketIndex(s));
+        String sectionName = mBaseIndex.getBucket(mBaseIndex.getBucketIndex(s)).getLabel();
         if (Utilities.trim(sectionName).isEmpty() && s.length() > 0) {
             int c = s.codePointAt(0);
             boolean startsWithDigit = Character.isDigit(c);
@@ -66,71 +69,4 @@
         }
         return sectionName;
     }
-
-    /**
-     * Base class to support Alphabetic indexing if not supported by the framework.
-     * TODO(winsonc): disable for non-english locales
-     */
-    private static class BaseIndex {
-
-        private static final String BUCKETS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-";
-        private static final int UNKNOWN_BUCKET_INDEX = BUCKETS.length() - 1;
-
-        /**
-         * Returns the index of the bucket in which the given string should appear.
-         */
-        protected int getBucketIndex(@NonNull String s) {
-            if (s.isEmpty()) {
-                return UNKNOWN_BUCKET_INDEX;
-            }
-            int index = BUCKETS.indexOf(s.substring(0, 1).toUpperCase());
-            if (index != -1) {
-                return index;
-            }
-            return UNKNOWN_BUCKET_INDEX;
-        }
-
-        /**
-         * Returns the label for the bucket at the given index (as returned by getBucketIndex).
-         */
-        protected String getBucketLabel(int index) {
-            return BUCKETS.substring(index, index + 1);
-        }
-    }
-
-    /**
-     * Implementation based on {@link AlphabeticIndex}.
-     */
-    private static class AlphabeticIndexVN extends BaseIndex {
-
-        private final AlphabeticIndex.ImmutableIndex mAlphabeticIndex;
-
-        public AlphabeticIndexVN(Context context) {
-            LocaleList locales = context.getResources().getConfiguration().getLocales();
-            int localeCount = locales.size();
-
-            Locale primaryLocale = localeCount == 0 ? Locale.ENGLISH : locales.get(0);
-            AlphabeticIndex indexBuilder = new AlphabeticIndex(primaryLocale);
-            for (int i = 1; i < localeCount; i++) {
-                indexBuilder.addLabels(locales.get(i));
-            }
-            indexBuilder.addLabels(Locale.ENGLISH);
-
-            mAlphabeticIndex = indexBuilder.buildImmutableIndex();
-        }
-
-        /**
-         * Returns the index of the bucket in which {@param s} should appear.
-         */
-        protected int getBucketIndex(String s) {
-            return mAlphabeticIndex.getBucketIndex(s);
-        }
-
-        /**
-         * Returns the label for the bucket at the given index
-         */
-        protected String getBucketLabel(int index) {
-            return mAlphabeticIndex.getBucket(index).getLabel();
-        }
-    }
 }
diff --git a/src/com/android/launcher3/compat/LauncherAppsCompat.java b/src/com/android/launcher3/compat/LauncherAppsCompat.java
index 58fc73d..cdb5c4d 100644
--- a/src/com/android/launcher3/compat/LauncherAppsCompat.java
+++ b/src/com/android/launcher3/compat/LauncherAppsCompat.java
@@ -27,25 +27,27 @@
 import android.os.Bundle;
 import android.os.UserHandle;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.Utilities;
 import com.android.launcher3.util.PackageUserKey;
 
 import java.util.List;
 
-import androidx.annotation.Nullable;
-
 public abstract class LauncherAppsCompat {
 
     public interface OnAppsChangedCallbackCompat {
-        void onPackageRemoved(String packageName, UserHandle user);
-        void onPackageAdded(String packageName, UserHandle user);
-        void onPackageChanged(String packageName, UserHandle user);
-        void onPackagesAvailable(String[] packageNames, UserHandle user, boolean replacing);
-        void onPackagesUnavailable(String[] packageNames, UserHandle user, boolean replacing);
-        void onPackagesSuspended(String[] packageNames, UserHandle user);
-        void onPackagesUnsuspended(String[] packageNames, UserHandle user);
-        void onShortcutsChanged(String packageName, List<ShortcutInfo> shortcuts,
-                UserHandle user);
+        default void onPackageRemoved(String packageName, UserHandle user) { }
+        default void onPackageAdded(String packageName, UserHandle user) { }
+        default void onPackageChanged(String packageName, UserHandle user) { }
+        default void onPackagesAvailable(String[] packageNames, UserHandle user,
+                boolean replacing) { }
+        default void onPackagesUnavailable(String[] packageNames, UserHandle user,
+                boolean replacing) { }
+        default void onPackagesSuspended(String[] packageNames, UserHandle user) { }
+        default void onPackagesUnsuspended(String[] packageNames, UserHandle user) { }
+        default void onShortcutsChanged(String packageName, List<ShortcutInfo> shortcuts,
+                UserHandle user) { }
     }
 
     protected LauncherAppsCompat() {
diff --git a/src/com/android/launcher3/compat/LauncherAppsCompatVO.java b/src/com/android/launcher3/compat/LauncherAppsCompatVO.java
index 6e7a1bd..5e13d00 100644
--- a/src/com/android/launcher3/compat/LauncherAppsCompatVO.java
+++ b/src/com/android/launcher3/compat/LauncherAppsCompatVO.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3.compat;
 
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.Intent;
@@ -30,19 +32,17 @@
 import android.os.Process;
 import android.os.UserHandle;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.LauncherAppState;
-import com.android.launcher3.LauncherModel;
 import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.compat.ShortcutConfigActivityInfo.ShortcutConfigActivityInfoVO;
 import com.android.launcher3.icons.LauncherIcons;
-import com.android.launcher3.util.LooperExecutor;
 import com.android.launcher3.util.PackageUserKey;
 
 import java.util.ArrayList;
 import java.util.List;
 
-import androidx.annotation.Nullable;
-
 @TargetApi(26)
 public class LauncherAppsCompatVO extends LauncherAppsCompatVL {
 
@@ -120,7 +120,7 @@
                 }
             } else {
                 // Block the worker thread until the accept() is called.
-                new LooperExecutor(LauncherModel.getWorkerLooper()).execute(new Runnable() {
+                MODEL_EXECUTOR.execute(new Runnable() {
                     @Override
                     public void run() {
                         try {
diff --git a/src/com/android/launcher3/compat/PackageInstallerCompatVL.java b/src/com/android/launcher3/compat/PackageInstallerCompatVL.java
index e1f17cf..607be5b 100644
--- a/src/com/android/launcher3/compat/PackageInstallerCompatVL.java
+++ b/src/com/android/launcher3/compat/PackageInstallerCompatVL.java
@@ -16,22 +16,23 @@
 
 package com.android.launcher3.compat;
 
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageInstaller;
 import android.content.pm.PackageInstaller.SessionCallback;
 import android.content.pm.PackageInstaller.SessionInfo;
 import android.content.pm.PackageManager;
-import android.os.Handler;
 import android.os.UserHandle;
 import android.text.TextUtils;
 import android.util.SparseArray;
 
+import com.android.launcher3.LauncherModel;
 import com.android.launcher3.SessionCommitReceiver;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.icons.IconCache;
 import com.android.launcher3.LauncherAppState;
-import com.android.launcher3.LauncherModel;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.IntSet;
@@ -53,7 +54,6 @@
 
     @Thunk final PackageInstaller mInstaller;
     private final IconCache mCache;
-    private final Handler mWorker;
     private final Context mAppContext;
     private final HashMap<String,Boolean> mSessionVerifiedMap = new HashMap<>();
     private final LauncherAppsCompat mLauncherApps;
@@ -63,11 +63,10 @@
         mAppContext = context.getApplicationContext();
         mInstaller = context.getPackageManager().getPackageInstaller();
         mCache = LauncherAppState.getInstance(context).getIconCache();
-        mWorker = new Handler(LauncherModel.getWorkerLooper());
-        mInstaller.registerSessionCallback(mCallback, mWorker);
+        mInstaller.registerSessionCallback(mCallback, MODEL_EXECUTOR.getHandler());
         mLauncherApps = LauncherAppsCompat.getInstance(context);
-        mPromiseIconIds = IntSet.wrap(IntArray.wrap(Utilities.getIntArrayFromString(
-                getPrefs(context).getString(PROMISE_ICON_IDS, ""))));
+        mPromiseIconIds = IntSet.wrap(IntArray.fromConcatString(
+                getPrefs(context).getString(PROMISE_ICON_IDS, "")));
 
         cleanUpPromiseIconIds();
     }
diff --git a/src/com/android/launcher3/config/BaseFlags.java b/src/com/android/launcher3/config/BaseFlags.java
index ea6261a..1523278 100644
--- a/src/com/android/launcher3/config/BaseFlags.java
+++ b/src/com/android/launcher3/config/BaseFlags.java
@@ -115,6 +115,10 @@
             "APP_SEARCH_IMPROVEMENTS", false,
             "Adds localized title and keyword search and ranking");
 
+    public static final TogglableFlag ENABLE_PREDICTION_DISMISS = new TogglableFlag(
+            "ENABLE_PREDICTION_DISMISS", false, "Allow option to dimiss apps from predicted list");
+
+
     public static void initialize(Context context) {
         // Avoid the disk read for user builds
         if (Utilities.IS_DEBUG_DEVICE) {
diff --git a/src/com/android/launcher3/dragndrop/AddItemActivity.java b/src/com/android/launcher3/dragndrop/AddItemActivity.java
index a2dcbf8..9fb1090 100644
--- a/src/com/android/launcher3/dragndrop/AddItemActivity.java
+++ b/src/com/android/launcher3/dragndrop/AddItemActivity.java
@@ -20,6 +20,7 @@
 import static com.android.launcher3.logging.LoggerUtils.newContainerTarget;
 import static com.android.launcher3.logging.LoggerUtils.newItemTarget;
 import static com.android.launcher3.logging.LoggerUtils.newLauncherEvent;
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
 
 import android.annotation.TargetApi;
 import android.app.ActivityOptions;
@@ -47,7 +48,6 @@
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherAppWidgetHost;
 import com.android.launcher3.LauncherAppWidgetProviderInfo;
-import com.android.launcher3.LauncherModel;
 import com.android.launcher3.R;
 import com.android.launcher3.compat.AppWidgetManagerCompat;
 import com.android.launcher3.compat.LauncherAppsCompatVO;
@@ -55,7 +55,6 @@
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action;
 import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
 import com.android.launcher3.util.InstantAppResolver;
-import com.android.launcher3.util.LooperExecutor;
 import com.android.launcher3.views.BaseDragLayer;
 import com.android.launcher3.widget.PendingAddShortcutInfo;
 import com.android.launcher3.widget.PendingAddWidgetInfo;
@@ -234,7 +233,7 @@
                 mWidgetCell.applyFromCellItem(item, mApp.getWidgetCache());
                 mWidgetCell.ensurePreview();
             }
-        }.executeOnExecutor(new LooperExecutor(LauncherModel.getWorkerLooper()));
+        }.executeOnExecutor(MODEL_EXECUTOR);
         // TODO: Create a worker looper executor and reuse that everywhere.
     }
 
diff --git a/src/com/android/launcher3/dragndrop/DragView.java b/src/com/android/launcher3/dragndrop/DragView.java
index 09c5e5b..f66d07e 100644
--- a/src/com/android/launcher3/dragndrop/DragView.java
+++ b/src/com/android/launcher3/dragndrop/DragView.java
@@ -17,6 +17,7 @@
 package com.android.launcher3.dragndrop;
 
 import static com.android.launcher3.Utilities.getBadge;
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
@@ -41,16 +42,19 @@
 import android.os.Looper;
 import android.view.View;
 
+import androidx.dynamicanimation.animation.FloatPropertyCompat;
+import androidx.dynamicanimation.animation.SpringAnimation;
+import androidx.dynamicanimation.animation.SpringForce;
+
 import com.android.launcher3.FastBitmapDrawable;
+import com.android.launcher3.FirstFrameAnimatorHelper;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.Launcher;
-import com.android.launcher3.LauncherModel;
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.LauncherStateManager;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
-import com.android.launcher3.FirstFrameAnimatorHelper;
 import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.icons.LauncherIcons;
 import com.android.launcher3.util.Themes;
@@ -58,10 +62,6 @@
 
 import java.util.Arrays;
 
-import androidx.dynamicanimation.animation.FloatPropertyCompat;
-import androidx.dynamicanimation.animation.SpringAnimation;
-import androidx.dynamicanimation.animation.SpringForce;
-
 public class DragView extends View implements LauncherStateManager.StateListener {
     private static final ColorMatrix sTempMatrix1 = new ColorMatrix();
     private static final ColorMatrix sTempMatrix2 = new ColorMatrix();
@@ -210,7 +210,7 @@
             return;
         }
         // Load the adaptive icon on a background thread and add the view in ui thread.
-        new Handler(LauncherModel.getWorkerLooper()).postAtFrontOfQueue(new Runnable() {
+        MODEL_EXECUTOR.getHandler().postAtFrontOfQueue(new Runnable() {
             @Override
             public void run() {
                 Object[] outObj = new Object[1];
diff --git a/src/com/android/launcher3/dragndrop/FolderAdaptiveIcon.java b/src/com/android/launcher3/dragndrop/FolderAdaptiveIcon.java
index d8a1f99..0bb3fba 100644
--- a/src/com/android/launcher3/dragndrop/FolderAdaptiveIcon.java
+++ b/src/com/android/launcher3/dragndrop/FolderAdaptiveIcon.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3.dragndrop;
 
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+
 import android.annotation.TargetApi;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
@@ -31,7 +33,6 @@
 import androidx.annotation.Nullable;
 
 import com.android.launcher3.Launcher;
-import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.R;
 import com.android.launcher3.folder.FolderIcon;
 import com.android.launcher3.folder.PreviewBackground;
@@ -85,7 +86,7 @@
         // Create the actual drawable on the UI thread to avoid race conditions with
         // FolderIcon draw pass
         try {
-            return new MainThreadExecutor().submit(() -> {
+            return MAIN_EXECUTOR.submit(() -> {
                 FolderIcon icon = launcher.findFolderIcon(folderId);
                 return icon == null ? null : createDrawableOnUiThread(icon, badge, dragViewSize);
             }).get();
diff --git a/src/com/android/launcher3/folder/Folder.java b/src/com/android/launcher3/folder/Folder.java
index 2ef6d70..28c25cf 100644
--- a/src/com/android/launcher3/folder/Folder.java
+++ b/src/com/android/launcher3/folder/Folder.java
@@ -26,12 +26,12 @@
 import android.annotation.SuppressLint;
 import android.appwidget.AppWidgetHostView;
 import android.content.Context;
-import android.content.res.Resources;
 import android.graphics.Canvas;
 import android.graphics.Path;
 import android.graphics.Rect;
 import android.text.InputType;
 import android.text.Selection;
+import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.Pair;
@@ -126,9 +126,6 @@
     private static final Rect sTempRect = new Rect();
     private static final int MIN_FOLDERS_FOR_HARDWARE_OPTIMIZATION = 10;
 
-    private static String sDefaultFolderName;
-    private static String sHintText;
-
     private final Alarm mReorderAlarm = new Alarm();
     private final Alarm mOnExitAlarm = new Alarm();
     private final Alarm mOnScrollHintAlarm = new Alarm();
@@ -196,8 +193,6 @@
         super(context, attrs);
         setAlwaysDrawnWithCacheEnabled(false);
 
-        setLocaleDependentFields(getResources(), false /* force */);
-
         mLauncher = Launcher.getLauncher(context);
         // We need this view to be focusable in touch mode so that when text editing of the folder
         // name is complete, we have something to focus on, thus hiding the cursor and giving
@@ -318,7 +313,11 @@
         mInfo.setTitle(newTitle);
         mLauncher.getModelWriter().updateItemInDatabase(mInfo);
 
-        mFolderName.setHint(sDefaultFolderName.contentEquals(newTitle) ? sHintText : null);
+        if (TextUtils.isEmpty(mInfo.title)) {
+            mFolderName.setHint(R.string.folder_hint_text);
+        } else {
+            mFolderName.setHint(null);
+        }
 
         sendCustomAccessibilityEvent(
                 this, AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED,
@@ -385,6 +384,7 @@
         mInfo = info;
         ArrayList<WorkspaceItemInfo> children = info.contents;
         Collections.sort(children, ITEM_POS_COMPARATOR);
+        updateItemLocationsInDatabaseBatch();
         mContent.bindItems(children);
 
         DragLayer.LayoutParams lp = (DragLayer.LayoutParams) getLayoutParams();
@@ -399,12 +399,12 @@
         updateTextViewFocus();
         mInfo.addListener(this);
 
-        if (!sDefaultFolderName.contentEquals(mInfo.title)) {
+        if (TextUtils.isEmpty(mInfo.title)) {
             mFolderName.setText(mInfo.title);
             mFolderName.setHint(null);
         } else {
             mFolderName.setText("");
-            mFolderName.setHint(sHintText);
+            mFolderName.setHint(R.string.folder_hint_text);
         }
 
         // In case any children didn't come across during loading, clean up the folder accordingly
@@ -822,9 +822,9 @@
         }
     }
 
+    @Override
     public void onDropCompleted(final View target, final DragObject d,
             final boolean success) {
-
         if (success) {
             if (mDeleteFolderOnDropCompleted && !mItemAddedBackToSelfViaIcon && target != this) {
                 replaceFolderWithFinalItem();
@@ -834,9 +834,9 @@
             WorkspaceItemInfo info = (WorkspaceItemInfo) d.dragInfo;
             View icon = (mCurrentDragView != null && mCurrentDragView.getTag() == info)
                     ? mCurrentDragView : mContent.createNewView(info);
-            ArrayList<View> views = getItemsInReadingOrder();
+            ArrayList<View> views = getIconsInReadingOrder();
             views.add(info.rank, icon);
-            mContent.arrangeChildren(views, views.size());
+            mContent.arrangeChildren(views);
             mItemsInvalidated = true;
 
             try (SuppressInfoChanges s = new SuppressInfoChanges()) {
@@ -874,16 +874,21 @@
     }
 
     private void updateItemLocationsInDatabaseBatch() {
-        ArrayList<View> list = getItemsInReadingOrder();
-        ArrayList<ItemInfo> items = new ArrayList<ItemInfo>();
-        for (int i = 0; i < list.size(); i++) {
-            View v = list.get(i);
-            ItemInfo info = (ItemInfo) v.getTag();
-            info.rank = i;
-            items.add(info);
+        FolderGridOrganizer verifier = new FolderGridOrganizer(
+                mLauncher.getDeviceProfile().inv).setFolderInfo(mInfo);
+
+        ArrayList<ItemInfo> items = new ArrayList<>();
+        int total = mInfo.contents.size();
+        for (int i = 0; i < total; i++) {
+            WorkspaceItemInfo itemInfo = mInfo.contents.get(i);
+            if (verifier.updateRankAndPos(itemInfo, i)) {
+                items.add(itemInfo);
+            }
         }
 
-        mLauncher.getModelWriter().moveItemsInDatabase(items, mInfo.id, 0);
+        if (!items.isEmpty()) {
+            mLauncher.getModelWriter().moveItemsInDatabase(items, mInfo.id, 0);
+        }
     }
 
     public void notifyDrop() {
@@ -1021,17 +1026,7 @@
      * Rearranges the children based on their rank.
      */
     public void rearrangeChildren() {
-        rearrangeChildren(-1);
-    }
-
-    /**
-     * Rearranges the children based on their rank.
-     * @param itemCount if greater than the total children count, empty spaces are left at the end,
-     * otherwise it is ignored.
-     */
-    public void rearrangeChildren(int itemCount) {
-        ArrayList<View> views = getItemsInReadingOrder();
-        mContent.arrangeChildren(views, Math.max(itemCount, views.size()));
+        mContent.arrangeChildren(getIconsInReadingOrder());
         mItemsInvalidated = true;
     }
 
@@ -1124,6 +1119,7 @@
         }
     }
 
+    @Override
     public void onDrop(DragObject d, DragOptions options) {
         // If the icon was dropped while the page was being scrolled, we need to compute
         // the target location again such that the icon is placed of the final page.
@@ -1171,12 +1167,6 @@
                 // before creating the view, so that WorkspaceItemInfo is updated appropriately.
                 mLauncher.getModelWriter().addOrMoveItemInDatabase(
                         si, mInfo.id, 0, si.cellX, si.cellY);
-
-                // We only need to update the locations if it doesn't get handled in
-                // #onDropCompleted.
-                if (d.dragSource != this) {
-                    updateItemLocationsInDatabaseBatch();
-                }
                 mIsExternalDrag = false;
             } else {
                 currentDragView = mCurrentDragView;
@@ -1203,7 +1193,13 @@
 
             // Temporarily suppress the listener, as we did all the work already here.
             try (SuppressInfoChanges s = new SuppressInfoChanges()) {
-                mInfo.add(si, false);
+                mInfo.add(si, mEmptyCellRank, false);
+            }
+
+            // We only need to update the locations if it doesn't get handled in
+            // #onDropCompleted.
+            if (d.dragSource != this) {
+                updateItemLocationsInDatabaseBatch();
             }
         }
 
@@ -1226,22 +1222,29 @@
     // to correspond to the animation of the icon back into the folder. This is
     public void hideItem(WorkspaceItemInfo info) {
         View v = getViewForInfo(info);
-        v.setVisibility(INVISIBLE);
+        if (v != null) {
+            v.setVisibility(INVISIBLE);
+        }
     }
     public void showItem(WorkspaceItemInfo info) {
         View v = getViewForInfo(info);
-        v.setVisibility(VISIBLE);
+        if (v != null) {
+            v.setVisibility(VISIBLE);
+        }
     }
 
     @Override
     public void onAdd(WorkspaceItemInfo item, int rank) {
-        View view = mContent.createAndAddViewForRank(item, rank);
+        FolderGridOrganizer verifier = new FolderGridOrganizer(
+                mLauncher.getDeviceProfile().inv).setFolderInfo(mInfo);
+        verifier.updateRankAndPos(item, rank);
         mLauncher.getModelWriter().addOrMoveItemInDatabase(item, mInfo.id, 0, item.cellX,
                 item.cellY);
+        updateItemLocationsInDatabaseBatch();
 
-        ArrayList<View> items = new ArrayList<>(getItemsInReadingOrder());
-        items.add(rank, view);
-        mContent.arrangeChildren(items, items.size());
+        ArrayList<View> items = new ArrayList<>(getIconsInReadingOrder());
+        items.add(rank, mContent.createAndAddViewForRank(item, rank));
+        mContent.arrangeChildren(items);
         mItemsInvalidated = true;
     }
 
@@ -1264,13 +1267,7 @@
     }
 
     private View getViewForInfo(final WorkspaceItemInfo item) {
-        return mContent.iterateOverItems(new ItemOperator() {
-
-            @Override
-            public boolean evaluate(ItemInfo info, View view) {
-                return info == item;
-            }
-        });
+        return mContent.iterateOverItems((info, view) -> info == item);
     }
 
     @Override
@@ -1286,7 +1283,10 @@
     public void onTitleChanged(CharSequence title) {
     }
 
-    public ArrayList<View> getItemsInReadingOrder() {
+    /**
+     * Returns the sorted list of all the icons in the folder
+     */
+    public ArrayList<View> getIconsInReadingOrder() {
         if (mItemsInvalidated) {
             mItemsInReadingOrder.clear();
             mContent.iterateOverItems(new ItemOperator() {
@@ -1303,7 +1303,7 @@
     }
 
     public List<BubbleTextView> getItemsOnPage(int page) {
-        ArrayList<View> allItems = getItemsInReadingOrder();
+        ArrayList<View> allItems = getIconsInReadingOrder();
         int lastPage = mContent.getPageCount() - 1;
         int totalItemsInFolder = allItems.size();
         int itemsPerPage = mContent.itemsPerPage();
@@ -1482,15 +1482,6 @@
         return false;
     }
 
-    public static void setLocaleDependentFields(Resources res, boolean force) {
-        if (sDefaultFolderName == null || force) {
-            sDefaultFolderName = res.getString(R.string.folder_name);
-        }
-        if (sHintText == null || force) {
-            sHintText = res.getString(R.string.folder_hint_text);
-        }
-    }
-
     /**
      * Alternative to using {@link #getClipToOutline()} as it only works with derivatives of
      * rounded rect.
diff --git a/src/com/android/launcher3/folder/FolderAnimationManager.java b/src/com/android/launcher3/folder/FolderAnimationManager.java
index 962f215..9eb0693 100644
--- a/src/com/android/launcher3/folder/FolderAnimationManager.java
+++ b/src/com/android/launcher3/folder/FolderAnimationManager.java
@@ -79,7 +79,7 @@
     private final TimeInterpolator mLargeFolderPreviewItemCloseInterpolator;
 
     private final PreviewItemDrawingParams mTmpParams = new PreviewItemDrawingParams(0, 0, 0, 0);
-
+    private final FolderGridOrganizer mPreviewVerifier;
 
     public FolderAnimationManager(Folder folder, boolean isOpening) {
         mFolder = folder;
@@ -91,6 +91,7 @@
 
         mContext = folder.getContext();
         mLauncher = folder.mLauncher;
+        mPreviewVerifier = new FolderGridOrganizer(mLauncher.getDeviceProfile().inv);
 
         mIsOpening = isOpening;
 
@@ -113,7 +114,7 @@
     public AnimatorSet getAnimator() {
         final DragLayer.LayoutParams lp = (DragLayer.LayoutParams) mFolder.getLayoutParams();
         ClippedFolderIconLayoutRule rule = mFolderIcon.getLayoutRule();
-        final List<BubbleTextView> itemsInPreview = mFolderIcon.getPreviewItems();
+        final List<BubbleTextView> itemsInPreview = getPreviewIconsOnPage(0);
 
         // Match position of the FolderIcon
         final Rect folderIconPos = new Rect();
@@ -226,15 +227,22 @@
     }
 
     /**
+     * Returns the list of "preview items" on {@param page}.
+     */
+    private List<BubbleTextView> getPreviewIconsOnPage(int page) {
+        return mPreviewVerifier.setFolderInfo(mFolder.mInfo)
+                .previewItemsForPage(page, mFolder.getIconsInReadingOrder());
+    }
+
+    /**
      * Animate the items on the current page.
      */
     private void addPreviewItemAnimators(AnimatorSet animatorSet, final float folderScale,
             int previewItemOffsetX, int previewItemOffsetY) {
         ClippedFolderIconLayoutRule rule = mFolderIcon.getLayoutRule();
         boolean isOnFirstPage = mFolder.mContent.getCurrentPage() == 0;
-        final List<BubbleTextView> itemsInPreview = isOnFirstPage
-                ? mFolderIcon.getPreviewItems()
-                : mFolderIcon.getPreviewItemsOnPage(mFolder.mContent.getCurrentPage());
+        final List<BubbleTextView> itemsInPreview = getPreviewIconsOnPage(
+                isOnFirstPage ? 0 : mFolder.mContent.getCurrentPage());
         final int numItemsInPreview = itemsInPreview.size();
         final int numItemsInFirstPagePreview = isOnFirstPage
                 ? numItemsInPreview : MAX_NUM_ITEMS_IN_PREVIEW;
diff --git a/src/com/android/launcher3/folder/FolderGridOrganizer.java b/src/com/android/launcher3/folder/FolderGridOrganizer.java
new file mode 100644
index 0000000..9d14a5f
--- /dev/null
+++ b/src/com/android/launcher3/folder/FolderGridOrganizer.java
@@ -0,0 +1,196 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.folder;
+
+import static com.android.launcher3.folder.ClippedFolderIconLayoutRule.MAX_NUM_ITEMS_IN_PREVIEW;
+
+import android.graphics.Point;
+
+import com.android.launcher3.FolderInfo;
+import com.android.launcher3.InvariantDeviceProfile;
+import com.android.launcher3.ItemInfo;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Utility class for managing item positions in a folder based on rank
+ */
+public class FolderGridOrganizer {
+
+    private final Point mPoint = new Point();
+    private final int mMaxCountX;
+    private final int mMaxCountY;
+    private final int mMaxItemsPerPage;
+
+    private int mNumItemsInFolder;
+    private int mCountX;
+    private int mCountY;
+    private boolean mDisplayingUpperLeftQuadrant = false;
+
+    /**
+     * Note: must call {@link #setFolderInfo(FolderInfo)} manually for verifier to work.
+     */
+    public FolderGridOrganizer(InvariantDeviceProfile profile) {
+        mMaxCountX = profile.numFolderColumns;
+        mMaxCountY = profile.numFolderRows;
+        mMaxItemsPerPage = mMaxCountX * mMaxCountY;
+    }
+
+    /**
+     * Updates the organizer with the provided folder info
+     */
+    public FolderGridOrganizer setFolderInfo(FolderInfo info) {
+        return setContentSize(info.contents.size());
+    }
+
+    /**
+     * Updates the organizer to reflect the content size
+     */
+    public FolderGridOrganizer setContentSize(int contentSize) {
+        if (contentSize != mNumItemsInFolder) {
+            calculateGridSize(contentSize);
+
+            mDisplayingUpperLeftQuadrant = contentSize > MAX_NUM_ITEMS_IN_PREVIEW;
+            mNumItemsInFolder = contentSize;
+        }
+        return this;
+    }
+
+    public int getCountX() {
+        return mCountX;
+    }
+
+    public int getCountY() {
+        return mCountY;
+    }
+
+    public int getMaxItemsPerPage() {
+        return mMaxItemsPerPage;
+    }
+
+    /**
+     * Calculates the grid size such that {@param count} items can fit in the grid.
+     * The grid size is calculated such that countY <= countX and countX = ceil(sqrt(count)) while
+     * maintaining the restrictions of {@link #mMaxCountX} &amp; {@link #mMaxCountY}.
+     */
+    private void calculateGridSize(int count) {
+        boolean done;
+        int gridCountX = mCountX;
+        int gridCountY = mCountY;
+
+        if (count >= mMaxItemsPerPage) {
+            gridCountX = mMaxCountX;
+            gridCountY = mMaxCountY;
+            done = true;
+        } else {
+            done = false;
+        }
+
+        while (!done) {
+            int oldCountX = gridCountX;
+            int oldCountY = gridCountY;
+            if (gridCountX * gridCountY < count) {
+                // Current grid is too small, expand it
+                if ((gridCountX <= gridCountY || gridCountY == mMaxCountY)
+                        && gridCountX < mMaxCountX) {
+                    gridCountX++;
+                } else if (gridCountY < mMaxCountY) {
+                    gridCountY++;
+                }
+                if (gridCountY == 0) gridCountY++;
+            } else if ((gridCountY - 1) * gridCountX >= count && gridCountY >= gridCountX) {
+                gridCountY = Math.max(0, gridCountY - 1);
+            } else if ((gridCountX - 1) * gridCountY >= count) {
+                gridCountX = Math.max(0, gridCountX - 1);
+            }
+            done = gridCountX == oldCountX && gridCountY == oldCountY;
+        }
+
+        mCountX = gridCountX;
+        mCountY = gridCountY;
+    }
+
+    /**
+     * Updates the item's cellX, cellY and rank corresponding to the provided rank.
+     * @return true if there was any change
+     */
+    public boolean updateRankAndPos(ItemInfo item, int rank) {
+        Point pos = getPosForRank(rank);
+        if (!pos.equals(item.cellX, item.cellY) || rank != item.rank) {
+            item.rank = rank;
+            item.cellX = pos.x;
+            item.cellY = pos.y;
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Returns the position of the item in the grid
+     */
+    public Point getPosForRank(int rank) {
+        int pagePos = rank % mMaxItemsPerPage;
+        mPoint.x = pagePos % mCountX;
+        mPoint.y = pagePos / mCountX;
+        return mPoint;
+    }
+
+    /**
+     * Returns the preview items for the provided pageNo using the full list of contents
+     */
+    public <T, R extends T> ArrayList<R> previewItemsForPage(int page, List<T> contents) {
+        ArrayList<R> result = new ArrayList<>();
+        int itemsPerPage = mCountX * mCountY;
+        int start = itemsPerPage * page;
+        int end = Math.min(start + itemsPerPage, contents.size());
+
+        for (int i = start, rank = 0; i < end; i++, rank++) {
+            if (isItemInPreview(page, rank)) {
+                result.add((R) contents.get(i));
+            }
+
+            if (result.size() == MAX_NUM_ITEMS_IN_PREVIEW) {
+                break;
+            }
+        }
+        return result;
+    }
+
+    /**
+     * Returns whether the item with rank is in the default Folder icon preview.
+     */
+    public boolean isItemInPreview(int rank) {
+        return isItemInPreview(0, rank);
+    }
+
+    /**
+     * @param page The page the item is on.
+     * @param rank The rank of the item.
+     * @return True iff the icon is in the 2x2 upper left quadrant of the Folder.
+     */
+    public boolean isItemInPreview(int page, int rank) {
+        // First page items are laid out such that the first 4 items are always in the upper
+        // left quadrant. For all other pages, we need to check the row and col.
+        if (page > 0 || mDisplayingUpperLeftQuadrant) {
+            int col = rank % mCountX;
+            int row = rank / mCountX;
+            return col < 2 && row < 2;
+        }
+        return rank < MAX_NUM_ITEMS_IN_PREVIEW;
+    }
+}
diff --git a/src/com/android/launcher3/folder/FolderIcon.java b/src/com/android/launcher3/folder/FolderIcon.java
index 250169c..686684d 100644
--- a/src/com/android/launcher3/folder/FolderIcon.java
+++ b/src/com/android/launcher3/folder/FolderIcon.java
@@ -95,7 +95,7 @@
     PreviewBackground mBackground = new PreviewBackground();
     private boolean mBackgroundIsVisible = true;
 
-    FolderIconPreviewVerifier mPreviewVerifier;
+    FolderGridOrganizer mPreviewVerifier;
     ClippedFolderIconLayoutRule mPreviewLayoutRule;
     private PreviewItemManager mPreviewItemManager;
     private PreviewItemDrawingParams mTmpParams = new PreviewItemDrawingParams(0, 0, 0, 0);
@@ -212,7 +212,7 @@
 
     private void setFolder(Folder folder) {
         mFolder = folder;
-        mPreviewVerifier = new FolderIconPreviewVerifier(mLauncher.getDeviceProfile().inv);
+        mPreviewVerifier = new FolderGridOrganizer(mLauncher.getDeviceProfile().inv);
         mPreviewVerifier.setFolderInfo(mFolder.getInfo());
         updatePreviewItems(false);
     }
@@ -230,11 +230,7 @@
     }
 
     public void addItem(WorkspaceItemInfo item) {
-        addItem(item, true);
-    }
-
-    public void addItem(WorkspaceItemInfo item, boolean animate) {
-        mInfo.add(item, animate);
+        mInfo.add(item, true);
     }
 
     public void removeItem(WorkspaceItemInfo item, boolean animate) {
@@ -294,8 +290,7 @@
     }
 
     private void onDrop(final WorkspaceItemInfo item, DragView animateView, Rect finalRect,
-            float scaleRelativeToDragLayer, int index,
-            boolean itemReturnedOnFailedDrop) {
+            float scaleRelativeToDragLayer, int index, boolean itemReturnedOnFailedDrop) {
         item.cellX = -1;
         item.cellY = -1;
 
@@ -327,9 +322,9 @@
             boolean itemAdded = false;
             if (itemReturnedOnFailedDrop || index >= MAX_NUM_ITEMS_IN_PREVIEW) {
                 List<BubbleTextView> oldPreviewItems = new ArrayList<>(mCurrentPreviewItems);
-                addItem(item, false);
+                mInfo.add(item, index, false);
                 mCurrentPreviewItems.clear();
-                mCurrentPreviewItems.addAll(getPreviewItems());
+                mCurrentPreviewItems.addAll(getPreviewIconsOnPage(0));
 
                 if (!oldPreviewItems.equals(mCurrentPreviewItems)) {
                     for (int i = 0; i < mCurrentPreviewItems.size(); ++i) {
@@ -349,13 +344,13 @@
             }
 
             if (!itemAdded) {
-                addItem(item);
+                mInfo.add(item, index, true);
             }
 
             int[] center = new int[2];
             float scale = getLocalCenterForIndex(index, numItemsInPreview, center);
-            center[0] = (int) Math.round(scaleRelativeToDragLayer * center[0]);
-            center[1] = (int) Math.round(scaleRelativeToDragLayer * center[1]);
+            center[0] = Math.round(scaleRelativeToDragLayer * center[0]);
+            center[1] = Math.round(scaleRelativeToDragLayer * center[1]);
 
             to.offset(center[0] - animateView.getMeasuredWidth() / 2,
                     center[1] - animateView.getMeasuredHeight() / 2);
@@ -396,7 +391,8 @@
             item = (WorkspaceItemInfo) d.dragInfo;
         }
         mFolder.notifyDrop();
-        onDrop(item, d.dragView, null, 1.0f, mInfo.contents.size(),
+        onDrop(item, d.dragView, null, 1.0f,
+                itemReturnedOnFailedDrop ? item.rank : mInfo.contents.size(),
                 itemReturnedOnFailedDrop);
     }
 
@@ -493,8 +489,7 @@
             mBackground.drawBackground(canvas);
         }
 
-        if (mFolder == null) return;
-        if (mFolder.getItemCount() == 0 && !mAnimating) return;
+        if (mCurrentPreviewItems.isEmpty() && !mAnimating) return;
 
         final int saveCount = canvas.save();
         canvas.clipPath(mBackground.getClipPath());
@@ -536,31 +531,11 @@
     }
 
     /**
-     * Returns the list of preview items displayed in the icon.
-     */
-    public List<BubbleTextView> getPreviewItems() {
-        return getPreviewItemsOnPage(0);
-    }
-
-    /**
      * Returns the list of "preview items" on {@param page}.
      */
-    public List<BubbleTextView> getPreviewItemsOnPage(int page) {
-        mPreviewVerifier.setFolderInfo(mFolder.getInfo());
-
-        List<BubbleTextView> itemsToDisplay = new ArrayList<>();
-        List<BubbleTextView> itemsOnPage = mFolder.getItemsOnPage(page);
-        int numItems = itemsOnPage.size();
-        for (int rank = 0; rank < numItems; ++rank) {
-            if (mPreviewVerifier.isItemInPreview(page, rank)) {
-                itemsToDisplay.add(itemsOnPage.get(rank));
-            }
-
-            if (itemsToDisplay.size() == MAX_NUM_ITEMS_IN_PREVIEW) {
-                break;
-            }
-        }
-        return itemsToDisplay;
+    public List<BubbleTextView> getPreviewIconsOnPage(int page) {
+        return mPreviewVerifier.setFolderInfo(mFolder.mInfo)
+                .previewItemsForPage(page, mFolder.getIconsInReadingOrder());
     }
 
     @Override
@@ -578,7 +553,7 @@
     private void updatePreviewItems(boolean animate) {
         mPreviewItemManager.updatePreviewItems(animate);
         mCurrentPreviewItems.clear();
-        mCurrentPreviewItems.addAll(getPreviewItems());
+        mCurrentPreviewItems.addAll(getPreviewIconsOnPage(0));
     }
 
     @Override
diff --git a/src/com/android/launcher3/folder/FolderIconPreviewVerifier.java b/src/com/android/launcher3/folder/FolderIconPreviewVerifier.java
deleted file mode 100644
index 4c84e35..0000000
--- a/src/com/android/launcher3/folder/FolderIconPreviewVerifier.java
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.launcher3.folder;
-
-import android.util.Log;
-
-import com.android.launcher3.FolderInfo;
-import com.android.launcher3.InvariantDeviceProfile;
-
-import static com.android.launcher3.folder.ClippedFolderIconLayoutRule.MAX_NUM_ITEMS_IN_PREVIEW;
-
-/**
- * Verifies whether an item in a Folder is displayed in the FolderIcon preview.
- */
-public class FolderIconPreviewVerifier {
-
-    private static final String TAG = "FolderPreviewVerifier";
-
-    private final int mMaxGridCountX;
-    private final int mMaxGridCountY;
-    private final int mMaxItemsPerPage;
-    private final int[] mGridSize = new int[] { 1, 1 };
-
-    private int mNumItemsInFolder;
-    private int mGridCountX;
-    private boolean mDisplayingUpperLeftQuadrant = false;
-
-    /**
-     * Note: must call {@link #setFolderInfo(FolderInfo)} manually for verifier to work.
-     */
-    public FolderIconPreviewVerifier(InvariantDeviceProfile profile) {
-        mMaxGridCountX = profile.numFolderColumns;
-        mMaxGridCountY = profile.numFolderRows;
-        mMaxItemsPerPage = mMaxGridCountX * mMaxGridCountY;
-    }
-
-    public void setFolderInfo(FolderInfo info) {
-        int numItemsInFolder = info.contents.size();
-        if (numItemsInFolder != mNumItemsInFolder) {
-            FolderPagedView.calculateGridSize(numItemsInFolder, 0, 0, mMaxGridCountX,
-                    mMaxGridCountY, mMaxItemsPerPage, mGridSize);
-            mGridCountX = mGridSize[0];
-
-            mDisplayingUpperLeftQuadrant = numItemsInFolder > MAX_NUM_ITEMS_IN_PREVIEW;
-            mNumItemsInFolder = numItemsInFolder;
-        }
-    }
-
-    /**
-     * Returns whether the item with {@param rank} is in the default Folder icon preview.
-     */
-    public boolean isItemInPreview(int rank) {
-        return isItemInPreview(0, rank);
-    }
-
-    /**
-     * @param page The page the item is on.
-     * @param rank The rank of the item.
-     * @return True iff the icon is in the 2x2 upper left quadrant of the Folder.
-     */
-    public boolean isItemInPreview(int page, int rank) {
-        if (mGridSize[0] == 1) {
-            Log.w(TAG, "setFolderInfo not called before checking if item is in preview.");
-        }
-
-        // First page items are laid out such that the first 4 items are always in the upper
-        // left quadrant. For all other pages, we need to check the row and col.
-        if (page > 0 || mDisplayingUpperLeftQuadrant) {
-            int col = rank % mGridCountX;
-            int row = rank / mGridCountX;
-            return col < 2 && row < 2;
-        }
-        return rank < MAX_NUM_ITEMS_IN_PREVIEW;
-    }
-}
diff --git a/src/com/android/launcher3/folder/FolderPagedView.java b/src/com/android/launcher3/folder/FolderPagedView.java
index 57105e7..3e00cae 100644
--- a/src/com/android/launcher3/folder/FolderPagedView.java
+++ b/src/com/android/launcher3/folder/FolderPagedView.java
@@ -38,9 +38,9 @@
 import com.android.launcher3.PagedView;
 import com.android.launcher3.R;
 import com.android.launcher3.ShortcutAndWidgetContainer;
-import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.Workspace.ItemOperator;
+import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.keyboard.ViewGroupFocusHelper;
 import com.android.launcher3.pageindicators.PageIndicatorDots;
@@ -50,6 +50,7 @@
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.Map;
+import java.util.function.ToIntFunction;
 
 public class FolderPagedView extends PagedView<PageIndicatorDots> {
 
@@ -73,12 +74,7 @@
 
     @Thunk final ArrayMap<View, Runnable> mPendingAnimations = new ArrayMap<>();
 
-    @ViewDebug.ExportedProperty(category = "launcher")
-    private final int mMaxCountX;
-    @ViewDebug.ExportedProperty(category = "launcher")
-    private final int mMaxCountY;
-    @ViewDebug.ExportedProperty(category = "launcher")
-    private final int mMaxItemsPerPage;
+    private final FolderGridOrganizer mOrganizer;
 
     private int mAllocatedContentSize;
     @ViewDebug.ExportedProperty(category = "launcher")
@@ -91,10 +87,7 @@
     public FolderPagedView(Context context, AttributeSet attrs) {
         super(context, attrs);
         InvariantDeviceProfile profile = LauncherAppState.getIDP(context);
-        mMaxCountX = profile.numFolderColumns;
-        mMaxCountY = profile.numFolderRows;
-
-        mMaxItemsPerPage = mMaxCountX * mMaxCountY;
+        mOrganizer = new FolderGridOrganizer(profile);
 
         mInflater = LayoutInflater.from(context);
 
@@ -111,57 +104,13 @@
     }
 
     /**
-     * Calculates the grid size such that {@param count} items can fit in the grid.
-     * The grid size is calculated such that countY <= countX and countX = ceil(sqrt(count)) while
-     * maintaining the restrictions of {@link #mMaxCountX} &amp; {@link #mMaxCountY}.
-     */
-    public static void calculateGridSize(int count, int countX, int countY, int maxCountX,
-            int maxCountY, int maxItemsPerPage, int[] out) {
-        boolean done;
-        int gridCountX = countX;
-        int gridCountY = countY;
-
-        if (count >= maxItemsPerPage) {
-            gridCountX = maxCountX;
-            gridCountY = maxCountY;
-            done = true;
-        } else {
-            done = false;
-        }
-
-        while (!done) {
-            int oldCountX = gridCountX;
-            int oldCountY = gridCountY;
-            if (gridCountX * gridCountY < count) {
-                // Current grid is too small, expand it
-                if ((gridCountX <= gridCountY || gridCountY == maxCountY)
-                        && gridCountX < maxCountX) {
-                    gridCountX++;
-                } else if (gridCountY < maxCountY) {
-                    gridCountY++;
-                }
-                if (gridCountY == 0) gridCountY++;
-            } else if ((gridCountY - 1) * gridCountX >= count && gridCountY >= gridCountX) {
-                gridCountY = Math.max(0, gridCountY - 1);
-            } else if ((gridCountX - 1) * gridCountY >= count) {
-                gridCountX = Math.max(0, gridCountX - 1);
-            }
-            done = gridCountX == oldCountX && gridCountY == oldCountY;
-        }
-
-        out[0] = gridCountX;
-        out[1] = gridCountY;
-    }
-
-    /**
      * Sets up the grid size such that {@param count} items can fit in the grid.
      */
-    public void setupContentDimensions(int count) {
+    private void setupContentDimensions(int count) {
         mAllocatedContentSize = count;
-        calculateGridSize(count, mGridCountX, mGridCountY, mMaxCountX, mMaxCountY, mMaxItemsPerPage,
-                sTmpArray);
-        mGridCountX = sTmpArray[0];
-        mGridCountY = sTmpArray[1];
+        mOrganizer.setContentSize(count);
+        mGridCountX = mOrganizer.getCountX();
+        mGridCountY = mOrganizer.getCountY();
 
         // Update grid size
         for (int i = getPageCount() - 1; i >= 0; i--) {
@@ -183,13 +132,13 @@
         for (WorkspaceItemInfo item : items) {
             icons.add(createNewView(item));
         }
-        arrangeChildren(icons, icons.size(), false);
+        arrangeChildren(icons);
     }
 
     public void allocateSpaceForRank(int rank) {
-        ArrayList<View> views = new ArrayList<>(mFolder.getItemsInReadingOrder());
+        ArrayList<View> views = new ArrayList<>(mFolder.getIconsInReadingOrder());
         views.add(rank, null);
-        arrangeChildren(views, views.size(), false);
+        arrangeChildren(views);
     }
 
     /**
@@ -199,7 +148,7 @@
     public int allocateRankForNewItem() {
         int rank = getItemCount();
         allocateSpaceForRank(rank);
-        setCurrentPage(rank / mMaxItemsPerPage);
+        setCurrentPage(rank / mOrganizer.getMaxItemsPerPage());
         return rank;
     }
 
@@ -215,16 +164,10 @@
      * related attributes. It assumes that {@param item} is already attached to the view.
      */
     public void addViewForRank(View view, WorkspaceItemInfo item, int rank) {
-        int pagePos = rank % mMaxItemsPerPage;
-        int pageNo = rank / mMaxItemsPerPage;
-
-        item.rank = rank;
-        item.cellX = pagePos % mGridCountX;
-        item.cellY = pagePos / mGridCountX;
+        int pageNo = rank / mOrganizer.getMaxItemsPerPage();
 
         CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams();
-        lp.cellX = item.cellX;
-        lp.cellY = item.cellY;
+        lp.setXY(mOrganizer.getPosForRank(rank));
         getPageAt(pageNo).addViewToCellLayout(view, -1, item.getViewId(), lp, true);
     }
 
@@ -295,16 +238,10 @@
      * page.
      *
      * @param list the ordered list of children.
-     * @param itemCount if greater than the total children count, empty spaces are left
-     * at the end, otherwise it is ignored.
-     *
      */
-    public void arrangeChildren(ArrayList<View> list, int itemCount) {
-        arrangeChildren(list, itemCount, true);
-    }
-
     @SuppressLint("RtlHardcoded")
-    private void arrangeChildren(ArrayList<View> list, int itemCount, boolean saveChanges) {
+    public void arrangeChildren(ArrayList<View> list) {
+        int itemCount = list.size();
         ArrayList<CellLayout> pages = new ArrayList<>();
         for (int i = 0; i < getChildCount(); i++) {
             CellLayout page = (CellLayout) getChildAt(i);
@@ -317,15 +254,12 @@
         CellLayout currentPage = null;
 
         int position = 0;
-        int newX, newY, rank;
+        int rank = 0;
 
-        FolderIconPreviewVerifier verifier = new FolderIconPreviewVerifier(
-                Launcher.getLauncher(getContext()).getDeviceProfile().inv);
-        verifier.setFolderInfo(mFolder.getInfo());
-        rank = 0;
+        mOrganizer.setFolderInfo(mFolder.getInfo());
         for (int i = 0; i < itemCount; i++) {
             View v = list.size() > i ? list.get(i) : null;
-            if (currentPage == null || position >= mMaxItemsPerPage) {
+            if (currentPage == null || position >= mOrganizer.getMaxItemsPerPage()) {
                 // Next page
                 if (pageItr.hasNext()) {
                     currentPage = pageItr.next();
@@ -337,28 +271,16 @@
 
             if (v != null) {
                 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) v.getLayoutParams();
-                newX = position % mGridCountX;
-                newY = position / mGridCountX;
                 ItemInfo info = (ItemInfo) v.getTag();
-                if (info.cellX != newX || info.cellY != newY || info.rank != rank) {
-                    info.cellX = newX;
-                    info.cellY = newY;
-                    info.rank = rank;
-                    if (saveChanges) {
-                        mFolder.mLauncher.getModelWriter().addOrMoveItemInDatabase(info,
-                                mFolder.mInfo.id, 0, info.cellX, info.cellY);
-                    }
-                }
-                lp.cellX = info.cellX;
-                lp.cellY = info.cellY;
+                lp.setXY(mOrganizer.getPosForRank(rank));
                 currentPage.addViewToCellLayout(v, -1, info.getViewId(), lp, true);
 
-                if (verifier.isItemInPreview(rank) && v instanceof BubbleTextView) {
+                if (mOrganizer.isItemInPreview(rank) && v instanceof BubbleTextView) {
                     ((BubbleTextView) v).verifyHighRes();
                 }
             }
 
-            rank ++;
+            rank++;
             position++;
         }
 
@@ -398,7 +320,7 @@
             return 0;
         }
         return getPageAt(lastPageIndex).getShortcutsAndWidgets().getChildCount()
-                + lastPageIndex * mMaxItemsPerPage;
+                + lastPageIndex * mOrganizer.getMaxItemsPerPage();
     }
 
     /**
@@ -412,31 +334,28 @@
             sTmpArray[0] = page.getCountX() - sTmpArray[0] - 1;
         }
         return Math.min(mAllocatedContentSize - 1,
-                pageIndex * mMaxItemsPerPage + sTmpArray[1] * mGridCountX + sTmpArray[0]);
+                pageIndex * mOrganizer.getMaxItemsPerPage()
+                        + sTmpArray[1] * mGridCountX + sTmpArray[0]);
     }
 
     public View getFirstItem() {
-        if (getChildCount() < 1) {
-            return null;
-        }
-        ShortcutAndWidgetContainer currContainer = getCurrentCellLayout().getShortcutsAndWidgets();
-        if (mGridCountX > 0) {
-            return currContainer.getChildAt(0, 0);
-        } else {
-            return currContainer.getChildAt(0);
-        }
+        return getViewInCurrentPage(c -> 0);
     }
 
     public View getLastItem() {
+        return getViewInCurrentPage(c -> c.getChildCount() - 1);
+    }
+
+    private View getViewInCurrentPage(ToIntFunction<ShortcutAndWidgetContainer> rankProvider) {
         if (getChildCount() < 1) {
             return null;
         }
-        ShortcutAndWidgetContainer currContainer = getCurrentCellLayout().getShortcutsAndWidgets();
-        int lastRank = currContainer.getChildCount() - 1;
+        ShortcutAndWidgetContainer container = getCurrentCellLayout().getShortcutsAndWidgets();
+        int rank = rankProvider.applyAsInt(container);
         if (mGridCountX > 0) {
-            return currContainer.getChildAt(lastRank % mGridCountX, lastRank / mGridCountX);
+            return container.getChildAt(rank % mGridCountX, rank / mGridCountX);
         } else {
-            return currContainer.getChildAt(lastRank);
+            return container.getChildAt(rank);
         }
     }
 
@@ -517,7 +436,7 @@
     }
 
     public boolean rankOnCurrentPage(int rank) {
-        int p = rank / mMaxItemsPerPage;
+        int p = rank / mOrganizer.getMaxItemsPerPage();
         return p == getNextPage();
     }
 
@@ -563,15 +482,16 @@
 
         // Animation only happens on the current page.
         int pageToAnimate = getNextPage();
+        int maxItemsPerPage = mOrganizer.getMaxItemsPerPage();
 
-        int pageT = target / mMaxItemsPerPage;
-        int pagePosT = target % mMaxItemsPerPage;
+        int pageT = target / maxItemsPerPage;
+        int pagePosT = target % maxItemsPerPage;
 
         if (pageT != pageToAnimate) {
             Log.e(TAG, "Cannot animate when the target cell is invisible");
         }
-        int pagePosE = empty % mMaxItemsPerPage;
-        int pageE = empty / mMaxItemsPerPage;
+        int pagePosE = empty % maxItemsPerPage;
+        int pageE = empty / maxItemsPerPage;
 
         int startPos, endPos;
         int moveStart, moveEnd;
@@ -588,7 +508,7 @@
             if (pageE < pageToAnimate) {
                 moveStart = empty;
                 // Instantly move the first item in the current page.
-                moveEnd = pageToAnimate * mMaxItemsPerPage;
+                moveEnd = pageToAnimate * maxItemsPerPage;
                 // Animate the 2nd item in the current page, as the first item was already moved to
                 // the last page.
                 startPos = 0;
@@ -606,10 +526,10 @@
                 // Move the items immediately.
                 moveStart = empty;
                 // Instantly move the last item in the current page.
-                moveEnd = (pageToAnimate + 1) * mMaxItemsPerPage - 1;
+                moveEnd = (pageToAnimate + 1) * maxItemsPerPage - 1;
 
                 // Animations start with the second last item in the page
-                startPos = mMaxItemsPerPage - 1;
+                startPos = maxItemsPerPage - 1;
             } else {
                 moveStart = moveEnd = -1;
                 startPos = pagePosE;
@@ -621,8 +541,8 @@
         // Instant moving views.
         while (moveStart != moveEnd) {
             int rankToMove = moveStart + direction;
-            int p = rankToMove / mMaxItemsPerPage;
-            int pagePos = rankToMove % mMaxItemsPerPage;
+            int p = rankToMove / maxItemsPerPage;
+            int pagePos = rankToMove % maxItemsPerPage;
             int x = pagePos % mGridCountX;
             int y = pagePos / mGridCountX;
 
@@ -667,9 +587,6 @@
         for (int i = startPos; i != endPos; i += direction) {
             int nextPos = i + direction;
             View v = page.getChildAt(nextPos % mGridCountX, nextPos / mGridCountX);
-            if (v != null) {
-                ((ItemInfo) v.getTag()).rank -= direction;
-            }
             if (page.animateChildToPosition(v, i % mGridCountX, i / mGridCountX,
                     REORDER_ANIMATION_DURATION, delay, true, true)) {
                 delay += delayAmount;
@@ -679,6 +596,6 @@
     }
 
     public int itemsPerPage() {
-        return mMaxItemsPerPage;
+        return mOrganizer.getMaxItemsPerPage();
     }
 }
diff --git a/src/com/android/launcher3/folder/PreviewItemManager.java b/src/com/android/launcher3/folder/PreviewItemManager.java
index 49763ba..2ac6bf4 100644
--- a/src/com/android/launcher3/folder/PreviewItemManager.java
+++ b/src/com/android/launcher3/folder/PreviewItemManager.java
@@ -30,15 +30,15 @@
 import android.view.View;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+
 import com.android.launcher3.BubbleTextView;
-import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.Utilities;
+import com.android.launcher3.WorkspaceItemInfo;
 
 import java.util.ArrayList;
 import java.util.List;
 
-import androidx.annotation.NonNull;
-
 /**
  * Manages the drawing and animations of {@link PreviewItemDrawingParams} for a {@link FolderIcon}.
  */
@@ -200,7 +200,7 @@
     }
 
     void buildParamsForPage(int page, ArrayList<PreviewItemDrawingParams> params, boolean animate) {
-        List<BubbleTextView> items = mIcon.getPreviewItemsOnPage(page);
+        List<BubbleTextView> items = mIcon.getPreviewIconsOnPage(page);
         int prevNumItems = params.size();
 
         // We adjust the size of the list to match the number of items in the preview.
diff --git a/src/com/android/launcher3/graphics/DragPreviewProvider.java b/src/com/android/launcher3/graphics/DragPreviewProvider.java
index 9263a2a..747efe3 100644
--- a/src/com/android/launcher3/graphics/DragPreviewProvider.java
+++ b/src/com/android/launcher3/graphics/DragPreviewProvider.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3.graphics;
 
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
+
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.BlurMaskFilter;
@@ -25,7 +27,6 @@
 import android.graphics.PorterDuffXfermode;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
-import android.os.Handler;
 import android.view.View;
 
 import com.android.launcher3.BubbleTextView;
@@ -35,7 +36,6 @@
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.folder.FolderIcon;
 import com.android.launcher3.icons.BitmapRenderer;
-import com.android.launcher3.util.UiThreadHelper;
 import com.android.launcher3.widget.LauncherAppWidgetHostView;
 import com.android.launcher3.widget.PendingAppWidgetHostView;
 
@@ -157,7 +157,7 @@
         }
 
         mOutlineGeneratorCallback = new OutlineGeneratorCallback(preview);
-        new Handler(UiThreadHelper.getBackgroundLooper()).post(mOutlineGeneratorCallback);
+        UI_HELPER_EXECUTOR.post(mOutlineGeneratorCallback);
     }
 
     protected static Rect getDrawableBounds(Drawable d) {
diff --git a/src/com/android/launcher3/graphics/GridOptionsProvider.java b/src/com/android/launcher3/graphics/GridOptionsProvider.java
index efd39ee..71b4366 100644
--- a/src/com/android/launcher3/graphics/GridOptionsProvider.java
+++ b/src/com/android/launcher3/graphics/GridOptionsProvider.java
@@ -1,5 +1,7 @@
 package com.android.launcher3.graphics;
 
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
+
 import android.content.ContentProvider;
 import android.content.ContentValues;
 import android.content.res.XmlResourceParser;
@@ -17,8 +19,6 @@
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.InvariantDeviceProfile.GridOption;
 import com.android.launcher3.R;
-import com.android.launcher3.util.LooperExecutor;
-import com.android.launcher3.util.UiThreadHelper;
 
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
@@ -180,10 +180,10 @@
             throw new FileNotFoundException(e.getMessage());
         }
 
-        LooperExecutor executor = new LooperExecutor(UiThreadHelper.getBackgroundLooper());
         try {
             return openPipeHelper(uri, MIME_TYPE_PNG, null,
-                    executor.submit(new LauncherPreviewRenderer(getContext(), idp)), BITMAP_WRITER);
+                    UI_HELPER_EXECUTOR.submit(new LauncherPreviewRenderer(getContext(), idp)),
+                    BITMAP_WRITER);
         } catch (Exception e) {
             throw new FileNotFoundException(e.getMessage());
         }
diff --git a/src/com/android/launcher3/icons/IconCache.java b/src/com/android/launcher3/icons/IconCache.java
index 55d58b9..5fb833c 100644
--- a/src/com/android/launcher3/icons/IconCache.java
+++ b/src/com/android/launcher3/icons/IconCache.java
@@ -16,6 +16,9 @@
 
 package com.android.launcher3.icons;
 
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ApplicationInfo;
@@ -36,8 +39,6 @@
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.ItemInfoWithIcon;
 import com.android.launcher3.LauncherFiles;
-import com.android.launcher3.LauncherModel;
-import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.compat.LauncherAppsCompat;
@@ -59,8 +60,6 @@
 
     private static final String TAG = "Launcher.IconCache";
 
-    private final MainThreadExecutor mMainThreadExecutor = new MainThreadExecutor();
-
     private final CachingLogic<ComponentWithLabel> mComponentWithLabelCachingLogic;
     private final CachingLogic<LauncherActivityInfo> mLauncherActivityInfoCachingLogic;
 
@@ -72,7 +71,7 @@
     private int mPendingIconRequestCount = 0;
 
     public IconCache(Context context, InvariantDeviceProfile inv) {
-        super(context, LauncherFiles.APP_ICONS_DB, LauncherModel.getWorkerLooper(),
+        super(context, LauncherFiles.APP_ICONS_DB, MODEL_EXECUTOR.getLooper(),
                 inv.fillResIconDpi, inv.iconBitmapSize, true /* inMemoryCache */);
         mComponentWithLabelCachingLogic = new ComponentCachingLogic(context);
         mLauncherActivityInfoCachingLogic = LauncherActivityCachingLogic.newInstance(context);
@@ -123,7 +122,7 @@
             final ItemInfoWithIcon info) {
         Preconditions.assertUIThread();
         if (mPendingIconRequestCount <= 0) {
-            LauncherModel.setWorkerPriority(Process.THREAD_PRIORITY_FOREGROUND);
+            MODEL_EXECUTOR.setThreadPriority(Process.THREAD_PRIORITY_FOREGROUND);
         }
         mPendingIconRequestCount ++;
 
@@ -135,7 +134,7 @@
                 } else if (info instanceof PackageItemInfo) {
                     getTitleAndIconForApp((PackageItemInfo) info, false);
                 }
-                mMainThreadExecutor.execute(() -> {
+                MAIN_EXECUTOR.execute(() -> {
                     caller.reapplyItemInfo(info);
                     onEnd();
                 });
@@ -148,7 +147,7 @@
     private void onIconRequestEnd() {
         mPendingIconRequestCount --;
         if (mPendingIconRequestCount <= 0) {
-            LauncherModel.setWorkerPriority(Process.THREAD_PRIORITY_BACKGROUND);
+            MODEL_EXECUTOR.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
         }
     }
 
diff --git a/src/com/android/launcher3/logging/EventLogArray.java b/src/com/android/launcher3/logging/EventLogArray.java
index f20f365..3ecfb23 100644
--- a/src/com/android/launcher3/logging/EventLogArray.java
+++ b/src/com/android/launcher3/logging/EventLogArray.java
@@ -16,11 +16,13 @@
 package com.android.launcher3.logging;
 
 
+import android.util.Log;
 import java.io.PrintWriter;
 import java.text.SimpleDateFormat;
 import java.util.Arrays;
 import java.util.Date;
 import java.util.Locale;
+import java.util.Random;
 
 /**
  * A utility class to record and log events. Events are stored in a fixed size array and old logs
@@ -37,6 +39,7 @@
     private final String name;
     private final EventEntry[] logs;
     private int nextIndex;
+    private int mLogId;
 
     public EventLogArray(String name, int size) {
         this.name = name;
@@ -52,10 +55,6 @@
         addLog(TYPE_INTEGER, event, extras);
     }
 
-    public void addLog(String event, float extras) {
-        addLog(TYPE_FLOAT, event, extras);
-    }
-
     public void addLog(String event, boolean extras) {
         addLog(extras ? TYPE_BOOL_TRUE : TYPE_BOOL_FALSE, event, 0);
     }
@@ -65,7 +64,7 @@
         int last = (nextIndex + logs.length - 1) % logs.length;
         int secondLast = (nextIndex + logs.length - 2) % logs.length;
         if (isEntrySame(logs[last], type, event) && isEntrySame(logs[secondLast], type, event)) {
-            logs[last].update(type, event, extras);
+            logs[last].update(type, event, extras, mLogId);
             logs[secondLast].duplicateCount++;
             return;
         }
@@ -73,7 +72,7 @@
         if (logs[nextIndex] == null) {
             logs[nextIndex] = new EventEntry();
         }
-        logs[nextIndex].update(type, event, extras);
+        logs[nextIndex].update(type, event, extras, mLogId);
         nextIndex = (nextIndex + 1) % logs.length;
     }
 
@@ -113,10 +112,18 @@
             if (log.duplicateCount > 0) {
                 msg.append(" & ").append(log.duplicateCount).append(" similar events");
             }
+            msg.append(" traceId: ").append(log.traceId);
             writer.println(msg);
         }
     }
 
+    /** Returns a 3 digit random number between 100-999 */
+    public int generateAndSetLogId() {
+        Random r = new Random();
+        mLogId = r.nextInt(900) + 100;
+        return mLogId;
+    }
+
     private boolean isEntrySame(EventEntry entry, int type, String event) {
         return entry != null && entry.type == type && entry.event.equals(event);
     }
@@ -129,11 +136,13 @@
         private float extras;
         private long time;
         private int duplicateCount;
+        private int traceId;
 
-        public void update(int type, String event, float extras) {
+        public void update(int type, String event, float extras, int traceId) {
             this.type = type;
             this.event = event;
             this.extras = extras;
+            this.traceId = traceId;
             time = System.currentTimeMillis();
             duplicateCount = 0;
         }
diff --git a/src/com/android/launcher3/logging/FileLog.java b/src/com/android/launcher3/logging/FileLog.java
index f7f8ef1..47a0f53 100644
--- a/src/com/android/launcher3/logging/FileLog.java
+++ b/src/com/android/launcher3/logging/FileLog.java
@@ -1,5 +1,7 @@
 package com.android.launcher3.logging;
 
+import static com.android.launcher3.util.Executors.createAndStartNewLooper;
+
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.Message;
@@ -8,6 +10,7 @@
 
 import com.android.launcher3.Utilities;
 import com.android.launcher3.config.FeatureFlags;
+import com.android.launcher3.util.IOUtils;
 
 import java.io.BufferedReader;
 import java.io.File;
@@ -91,9 +94,8 @@
     private static Handler getHandler() {
         synchronized (DATE_FORMAT) {
             if (sHandler == null) {
-                HandlerThread thread = new HandlerThread("file-logger");
-                thread.start();
-                sHandler = new Handler(thread.getLooper(), new LogWriterCallback());
+                sHandler = new Handler(createAndStartNewLooper("file-logger"),
+                        new LogWriterCallback());
             }
         }
         return sHandler;
@@ -131,7 +133,7 @@
         private PrintWriter mCurrentWriter = null;
 
         private void closeWriter() {
-            Utilities.closeSilently(mCurrentWriter);
+            IOUtils.closeSilently(mCurrentWriter);
             mCurrentWriter = null;
         }
 
@@ -219,7 +221,7 @@
             } catch (Exception e) {
                 // ignore
             } finally {
-                Utilities.closeSilently(in);
+                IOUtils.closeSilently(in);
             }
         }
     }
diff --git a/src/com/android/launcher3/model/AddWorkspaceItemsTask.java b/src/com/android/launcher3/model/AddWorkspaceItemsTask.java
index 7d4f2f7..dfd5a70 100644
--- a/src/com/android/launcher3/model/AddWorkspaceItemsTask.java
+++ b/src/com/android/launcher3/model/AddWorkspaceItemsTask.java
@@ -22,7 +22,6 @@
 import android.util.LongSparseArray;
 import android.util.Pair;
 
-import com.android.launcher3.AllAppsList;
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.FolderInfo;
 import com.android.launcher3.InvariantDeviceProfile;
@@ -30,14 +29,14 @@
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherAppWidgetInfo;
 import com.android.launcher3.LauncherModel.CallbackTask;
-import com.android.launcher3.LauncherModel.Callbacks;
+import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.WorkspaceItemInfo;
-import com.android.launcher3.Utilities;
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.compat.PackageInstallerCompat;
 import com.android.launcher3.util.GridOccupancy;
 import com.android.launcher3.util.IntArray;
+import com.android.launcher3.util.PackageManagerHelper;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -200,7 +199,7 @@
             intentWithoutPkg = intent.toUri(0);
         }
 
-        boolean isLauncherAppTarget = Utilities.isLauncherAppTarget(intent);
+        boolean isLauncherAppTarget = PackageManagerHelper.isLauncherAppTarget(intent);
         synchronized (dataModel) {
             for (ItemInfo item : dataModel.itemsIdMap) {
                 if (item instanceof WorkspaceItemInfo) {
diff --git a/src/com/android/launcher3/AllAppsList.java b/src/com/android/launcher3/model/AllAppsList.java
similarity index 69%
rename from src/com/android/launcher3/AllAppsList.java
rename to src/com/android/launcher3/model/AllAppsList.java
index 8b49c06..3873a17 100644
--- a/src/com/android/launcher3/AllAppsList.java
+++ b/src/com/android/launcher3/model/AllAppsList.java
@@ -14,25 +14,37 @@
  * limitations under the License.
  */
 
-package com.android.launcher3;
+package com.android.launcher3.model;
+
+import static com.android.launcher3.AppInfo.COMPONENT_KEY_COMPARATOR;
+import static com.android.launcher3.AppInfo.EMPTY_ARRAY;
 
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.LauncherActivityInfo;
+import android.os.LocaleList;
 import android.os.Process;
 import android.os.UserHandle;
 import android.util.Log;
 
+import com.android.launcher3.AppFilter;
+import com.android.launcher3.AppInfo;
+import com.android.launcher3.PromiseAppInfo;
+import com.android.launcher3.compat.AlphabeticIndexCompat;
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.compat.PackageInstallerCompat;
+import com.android.launcher3.compat.PackageInstallerCompat.PackageInstallInfo;
 import com.android.launcher3.icons.IconCache;
 import com.android.launcher3.util.FlagOp;
 import com.android.launcher3.util.ItemInfoMatcher;
+import com.android.launcher3.util.SafeCloseable;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashSet;
 import java.util.List;
+import java.util.function.Consumer;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -42,29 +54,40 @@
  * Stores the list of all applications for the all apps view.
  */
 public class AllAppsList {
+
     private static final String TAG = "AllAppsList";
+    private static final Consumer<AppInfo> NO_OP_CONSUMER = a -> { };
+
 
     public static final int DEFAULT_APPLICATIONS_NUMBER = 42;
 
     /** The list off all apps. */
     public final ArrayList<AppInfo> data = new ArrayList<>(DEFAULT_APPLICATIONS_NUMBER);
-    /** The list of apps that have been added since the last notify() call. */
-    public ArrayList<AppInfo> added = new ArrayList<>(DEFAULT_APPLICATIONS_NUMBER);
-    /** The list of apps that have been removed since the last notify() call. */
-    public ArrayList<AppInfo> removed = new ArrayList<>();
-    /** The list of apps that have been modified since the last notify() call. */
-    public ArrayList<AppInfo> modified = new ArrayList<>();
 
     private IconCache mIconCache;
-
     private AppFilter mAppFilter;
 
+    private boolean mDataChanged = false;
+    private Consumer<AppInfo> mRemoveListener = NO_OP_CONSUMER;
+
+    private AlphabeticIndexCompat mIndex;
+
     /**
      * Boring constructor.
      */
     public AllAppsList(IconCache iconCache, AppFilter appFilter) {
         mIconCache = iconCache;
         mAppFilter = appFilter;
+        mIndex = new AlphabeticIndexCompat(LocaleList.getDefault());
+    }
+
+    /**
+     * Returns true if there have been any changes since last call.
+     */
+    public boolean getAndResetChangeFlag() {
+        boolean result = mDataChanged;
+        mDataChanged = false;
+        return result;
     }
 
     /**
@@ -81,9 +104,10 @@
             return;
         }
         mIconCache.getTitleAndIcon(info, activityInfo, true /* useLowResIcon */);
+        info.sectionName = mIndex.computeSectionName(info.title);
 
         data.add(info);
-        added.add(info);
+        mDataChanged = true;
     }
 
     public void addPromiseApp(Context context,
@@ -94,31 +118,46 @@
         if (applicationInfo == null) {
             PromiseAppInfo info = new PromiseAppInfo(installInfo);
             mIconCache.getTitleAndIcon(info, info.usingLowResIcon());
+            info.sectionName = mIndex.computeSectionName(info.title);
+
             data.add(info);
-            added.add(info);
+            mDataChanged = true;
         }
     }
 
-    public void removePromiseApp(AppInfo appInfo) {
-        // the <em>removed</em> list is handled by the caller
-        // so not adding it here
-        data.remove(appInfo);
+    public PromiseAppInfo updatePromiseInstallInfo(PackageInstallInfo installInfo) {
+        UserHandle user = Process.myUserHandle();
+        for (int i=0; i < data.size(); i++) {
+            final AppInfo appInfo = data.get(i);
+            final ComponentName tgtComp = appInfo.getTargetComponent();
+            if (tgtComp != null && tgtComp.getPackageName().equals(installInfo.packageName)
+                    && appInfo.user.equals(user)
+                    && appInfo instanceof PromiseAppInfo) {
+                final PromiseAppInfo promiseAppInfo = (PromiseAppInfo) appInfo;
+                if (installInfo.state == PackageInstallerCompat.STATUS_INSTALLING) {
+                    promiseAppInfo.level = installInfo.progress;
+                    return promiseAppInfo;
+                } else if (installInfo.state == PackageInstallerCompat.STATUS_FAILED) {
+                    removeApp(i);
+                }
+            }
+        }
+        return null;
+    }
+
+    private void removeApp(int index) {
+        AppInfo removed = data.remove(index);
+        if (removed != null) {
+            mDataChanged = true;
+            mRemoveListener.accept(removed);
+        }
     }
 
     public void clear() {
         data.clear();
-        // TODO: do we clear these too?
-        added.clear();
-        removed.clear();
-        modified.clear();
-    }
-
-    public int size() {
-        return data.size();
-    }
-
-    public AppInfo get(int index) {
-        return data.get(index);
+        mDataChanged = false;
+        // Reset the index as locales might have changed
+        mIndex = new AlphabeticIndexCompat(LocaleList.getDefault());
     }
 
     /**
@@ -142,8 +181,7 @@
         for (int i = data.size() - 1; i >= 0; i--) {
             AppInfo info = data.get(i);
             if (info.user.equals(user) && packageName.equals(info.componentName.getPackageName())) {
-                removed.add(info);
-                data.remove(i);
+                removeApp(i);
             }
         }
     }
@@ -157,17 +195,17 @@
             AppInfo info = data.get(i);
             if (matcher.matches(info, info.componentName)) {
                 info.runtimeStatusFlags = op.apply(info.runtimeStatusFlags);
-                modified.add(info);
+                mDataChanged = true;
             }
         }
     }
 
-    public void updateIconsAndLabels(HashSet<String> packages, UserHandle user,
-            ArrayList<AppInfo> outUpdates) {
+    public void updateIconsAndLabels(HashSet<String> packages, UserHandle user) {
         for (AppInfo info : data) {
             if (info.user.equals(user) && packages.contains(info.componentName.getPackageName())) {
                 mIconCache.updateTitleAndIcon(info);
-                outUpdates.add(info);
+                info.sectionName = mIndex.computeSectionName(info.title);
+                mDataChanged = true;
             }
         }
     }
@@ -188,8 +226,7 @@
                         && packageName.equals(applicationInfo.componentName.getPackageName())) {
                     if (!findActivity(matches, applicationInfo.componentName)) {
                         Log.w(TAG, "Changing shortcut target due to app component name change.");
-                        removed.add(applicationInfo);
-                        data.remove(i);
+                        removeApp(i);
                     }
                 }
             }
@@ -202,7 +239,9 @@
                     add(new AppInfo(context, info, user), info);
                 } else {
                     mIconCache.getTitleAndIcon(applicationInfo, info, true /* useLowResIcon */);
-                    modified.add(applicationInfo);
+                    applicationInfo.sectionName = mIndex.computeSectionName(applicationInfo.title);
+
+                    mDataChanged = true;
                 }
             }
         } else {
@@ -211,15 +250,13 @@
                 final AppInfo applicationInfo = data.get(i);
                 if (user.equals(applicationInfo.user)
                         && packageName.equals(applicationInfo.componentName.getPackageName())) {
-                    removed.add(applicationInfo);
                     mIconCache.remove(applicationInfo.componentName, user);
-                    data.remove(i);
+                    removeApp(i);
                 }
             }
         }
     }
 
-
     /**
      * Returns whether <em>apps</em> contains <em>component</em>.
      */
@@ -247,4 +284,16 @@
         }
         return null;
     }
+
+    public AppInfo[] copyData() {
+        AppInfo[] result = data.toArray(EMPTY_ARRAY);
+        Arrays.sort(result, COMPONENT_KEY_COMPARATOR);
+        return result;
+    }
+
+    public SafeCloseable trackRemoves(Consumer<AppInfo> removeListener) {
+        mRemoveListener = removeListener;
+
+        return () -> mRemoveListener = NO_OP_CONSUMER;
+    }
 }
diff --git a/src/com/android/launcher3/model/AppLaunchTracker.java b/src/com/android/launcher3/model/AppLaunchTracker.java
index 29a46cf..13ab033 100644
--- a/src/com/android/launcher3/model/AppLaunchTracker.java
+++ b/src/com/android/launcher3/model/AppLaunchTracker.java
@@ -51,5 +51,8 @@
     public void onStartApp(ComponentName componentName, UserHandle user,
             @Nullable String container) { }
 
+    public void onDismissApp(ComponentName componentName, UserHandle user,
+             @Nullable String container){}
+
     public void onReturnedToHome() { }
 }
diff --git a/src/com/android/launcher3/model/BaseLoaderResults.java b/src/com/android/launcher3/model/BaseLoaderResults.java
index 97cf267..0a4f005 100644
--- a/src/com/android/launcher3/model/BaseLoaderResults.java
+++ b/src/com/android/launcher3/model/BaseLoaderResults.java
@@ -16,21 +16,21 @@
 
 package com.android.launcher3.model;
 
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+
 import android.os.Looper;
 import android.util.Log;
 
-import com.android.launcher3.AllAppsList;
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherAppWidgetInfo;
 import com.android.launcher3.LauncherModel.CallbackTask;
-import com.android.launcher3.LauncherModel.Callbacks;
 import com.android.launcher3.LauncherSettings;
-import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.PagedView;
 import com.android.launcher3.config.FeatureFlags;
+import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.LooperIdleLock;
@@ -65,7 +65,7 @@
 
     public BaseLoaderResults(LauncherAppState app, BgDataModel dataModel,
             AllAppsList allAppsList, int pageToBindFirst, WeakReference<Callbacks> callbacks) {
-        mUiExecutor = new MainThreadExecutor();
+        mUiExecutor = MAIN_EXECUTOR;
         mApp = app;
         mBgDataModel = dataModel;
         mBgAllAppsList = allAppsList;
@@ -279,9 +279,8 @@
 
     public void bindAllApps() {
         // shallow copy
-        @SuppressWarnings("unchecked")
-        ArrayList<AppInfo> list = (ArrayList<AppInfo>) mBgAllAppsList.data.clone();
-        executeCallbacksTask(c -> c.bindAllApplications(list), mUiExecutor);
+        AppInfo[] apps = mBgAllAppsList.copyData();
+        executeCallbacksTask(c -> c.bindAllApplications(apps), mUiExecutor);
     }
 
     public abstract void bindWidgets();
diff --git a/src/com/android/launcher3/model/BaseModelUpdateTask.java b/src/com/android/launcher3/model/BaseModelUpdateTask.java
index eea3d8c..e12633b 100644
--- a/src/com/android/launcher3/model/BaseModelUpdateTask.java
+++ b/src/com/android/launcher3/model/BaseModelUpdateTask.java
@@ -17,12 +17,12 @@
 
 import android.util.Log;
 
-import com.android.launcher3.AllAppsList;
+import com.android.launcher3.AppInfo;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherModel;
 import com.android.launcher3.LauncherModel.ModelUpdateTask;
 import com.android.launcher3.LauncherModel.CallbackTask;
-import com.android.launcher3.LauncherModel.Callbacks;
+import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.ItemInfoMatcher;
@@ -30,6 +30,7 @@
 
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.concurrent.Executor;
 
 /**
@@ -95,12 +96,7 @@
 
     public void bindUpdatedWorkspaceItems(final ArrayList<WorkspaceItemInfo> updatedShortcuts) {
         if (!updatedShortcuts.isEmpty()) {
-            scheduleCallbackTask(new CallbackTask() {
-                @Override
-                public void execute(Callbacks callbacks) {
-                    callbacks.bindWorkspaceItemsChanged(updatedShortcuts);
-                }
-            });
+            scheduleCallbackTask(c -> c.bindWorkspaceItemsChanged(updatedShortcuts));
         }
     }
 
@@ -113,23 +109,20 @@
     public void bindUpdatedWidgets(BgDataModel dataModel) {
         final ArrayList<WidgetListRowEntry> widgets =
                 dataModel.widgetsModel.getWidgetsList(mApp.getContext());
-        scheduleCallbackTask(new CallbackTask() {
-            @Override
-            public void execute(Callbacks callbacks) {
-                callbacks.bindAllWidgets(widgets);
-            }
-        });
+        scheduleCallbackTask(c -> c.bindAllWidgets(widgets));
     }
 
     public void deleteAndBindComponentsRemoved(final ItemInfoMatcher matcher) {
         getModelWriter().deleteItemsFromDatabase(matcher);
 
         // Call the components-removed callback
-        scheduleCallbackTask(new CallbackTask() {
-            @Override
-            public void execute(Callbacks callbacks) {
-                callbacks.bindWorkspaceComponentsRemoved(matcher);
-            }
-        });
+        scheduleCallbackTask(c -> c.bindWorkspaceComponentsRemoved(matcher));
+    }
+
+    public void bindApplicationsIfNeeded() {
+        if (mAllAppsList.getAndResetChangeFlag()) {
+            AppInfo[] apps = mAllAppsList.copyData();
+            scheduleCallbackTask(c -> c.bindAllApplications(apps));
+        }
     }
 }
diff --git a/src/com/android/launcher3/model/BgDataModel.java b/src/com/android/launcher3/model/BgDataModel.java
index 8f0cd08..0e20270 100644
--- a/src/com/android/launcher3/model/BgDataModel.java
+++ b/src/com/android/launcher3/model/BgDataModel.java
@@ -22,11 +22,13 @@
 import android.util.Log;
 import android.util.MutableInt;
 
+import com.android.launcher3.AppInfo;
 import com.android.launcher3.FolderInfo;
 import com.android.launcher3.InstallShortcutReceiver;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.LauncherAppWidgetInfo;
 import com.android.launcher3.LauncherSettings;
+import com.android.launcher3.PromiseAppInfo;
 import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.Workspace;
 import com.android.launcher3.config.FeatureFlags;
@@ -40,6 +42,10 @@
 import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.IntSparseArrayMap;
+import com.android.launcher3.util.ItemInfoMatcher;
+import com.android.launcher3.util.ViewOnDrawExecutor;
+import com.android.launcher3.widget.WidgetListRowEntry;
+
 import com.google.protobuf.nano.MessageNano;
 
 import java.io.FileDescriptor;
@@ -49,6 +55,7 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
@@ -391,4 +398,30 @@
             }
         }
     }
+
+    public interface Callbacks {
+        void rebindModel();
+
+        int getCurrentWorkspaceScreen();
+        void clearPendingBinds();
+        void startBinding();
+        void bindItems(List<ItemInfo> shortcuts, boolean forceAnimateIcons);
+        void bindScreens(IntArray orderedScreenIds);
+        void finishFirstPageBind(ViewOnDrawExecutor executor);
+        void finishBindingItems(int pageBoundFirst);
+        void preAddApps();
+        void bindAppsAdded(IntArray newScreens,
+                ArrayList<ItemInfo> addNotAnimated, ArrayList<ItemInfo> addAnimated);
+        void bindPromiseAppProgressUpdated(PromiseAppInfo app);
+        void bindWorkspaceItemsChanged(ArrayList<WorkspaceItemInfo> updated);
+        void bindWidgetsRestored(ArrayList<LauncherAppWidgetInfo> widgets);
+        void bindRestoreItemsChange(HashSet<ItemInfo> updates);
+        void bindWorkspaceComponentsRemoved(ItemInfoMatcher matcher);
+        void bindAllWidgets(ArrayList<WidgetListRowEntry> widgets);
+        void onPageBoundSynchronously(int page);
+        void executeOnNextDraw(ViewOnDrawExecutor executor);
+        void bindDeepShortcutMap(HashMap<ComponentKey, Integer> deepShortcutMap);
+
+        void bindAllApplications(AppInfo[] apps);
+    }
 }
diff --git a/src/com/android/launcher3/model/CacheDataUpdatedTask.java b/src/com/android/launcher3/model/CacheDataUpdatedTask.java
index 7852444..c1c8be3 100644
--- a/src/com/android/launcher3/model/CacheDataUpdatedTask.java
+++ b/src/com/android/launcher3/model/CacheDataUpdatedTask.java
@@ -18,14 +18,10 @@
 import android.content.ComponentName;
 import android.os.UserHandle;
 
-import com.android.launcher3.AllAppsList;
-import com.android.launcher3.AppInfo;
 import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.icons.IconCache;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.LauncherAppState;
-import com.android.launcher3.LauncherModel.CallbackTask;
-import com.android.launcher3.LauncherModel.Callbacks;
 import com.android.launcher3.LauncherSettings;
 
 import java.util.ArrayList;
@@ -53,9 +49,9 @@
     public void execute(LauncherAppState app, BgDataModel dataModel, AllAppsList apps) {
         IconCache iconCache = app.getIconCache();
 
-        final ArrayList<AppInfo> updatedApps = new ArrayList<>();
 
         ArrayList<WorkspaceItemInfo> updatedShortcuts = new ArrayList<>();
+
         synchronized (dataModel) {
             for (ItemInfo info : dataModel.itemsIdMap) {
                 if (info instanceof WorkspaceItemInfo && mUser.equals(info.user)) {
@@ -69,18 +65,10 @@
                     }
                 }
             }
-            apps.updateIconsAndLabels(mPackages, mUser, updatedApps);
+            apps.updateIconsAndLabels(mPackages, mUser);
         }
         bindUpdatedWorkspaceItems(updatedShortcuts);
-
-        if (!updatedApps.isEmpty()) {
-            scheduleCallbackTask(new CallbackTask() {
-                @Override
-                public void execute(Callbacks callbacks) {
-                    callbacks.bindAppsAddedOrUpdated(updatedApps);
-                }
-            });
-        }
+        bindApplicationsIfNeeded();
     }
 
     public boolean isValidShortcut(WorkspaceItemInfo si) {
diff --git a/src/com/android/launcher3/model/LoaderTask.java b/src/com/android/launcher3/model/LoaderTask.java
index 4b01b5e..60e917d 100644
--- a/src/com/android/launcher3/model/LoaderTask.java
+++ b/src/com/android/launcher3/model/LoaderTask.java
@@ -20,6 +20,8 @@
 import static com.android.launcher3.ItemInfoWithIcon.FLAG_DISABLED_SAFEMODE;
 import static com.android.launcher3.ItemInfoWithIcon.FLAG_DISABLED_SUSPENDED;
 import static com.android.launcher3.model.LoaderResults.filterCurrentWorkspaceItems;
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+import static com.android.launcher3.util.PackageManagerHelper.isSystemApp;
 
 import android.appwidget.AppWidgetProviderInfo;
 import android.content.ComponentName;
@@ -31,7 +33,6 @@
 import android.content.pm.PackageInstaller;
 import android.content.pm.PackageInstaller.SessionInfo;
 import android.content.pm.ShortcutInfo;
-import android.os.Handler;
 import android.os.Process;
 import android.os.UserHandle;
 import android.text.TextUtils;
@@ -39,7 +40,6 @@
 import android.util.LongSparseArray;
 import android.util.MutableInt;
 
-import com.android.launcher3.AllAppsList;
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.FolderInfo;
 import com.android.launcher3.InstallShortcutReceiver;
@@ -57,7 +57,7 @@
 import com.android.launcher3.compat.UserManagerCompat;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.folder.Folder;
-import com.android.launcher3.folder.FolderIconPreviewVerifier;
+import com.android.launcher3.folder.FolderGridOrganizer;
 import com.android.launcher3.icons.ComponentWithLabel;
 import com.android.launcher3.icons.ComponentWithLabel.ComponentCachingLogic;
 import com.android.launcher3.icons.IconCache;
@@ -66,9 +66,11 @@
 import com.android.launcher3.icons.cache.IconCacheUpdateHandler;
 import com.android.launcher3.logging.FileLog;
 import com.android.launcher3.provider.ImportDataTask;
+import com.android.launcher3.qsb.QsbContainerView;
 import com.android.launcher3.shortcuts.DeepShortcutManager;
 import com.android.launcher3.shortcuts.ShortcutKey;
 import com.android.launcher3.util.ComponentKey;
+import com.android.launcher3.util.IOUtils;
 import com.android.launcher3.util.LooperIdleLock;
 import com.android.launcher3.util.MultiHashMap;
 import com.android.launcher3.util.PackageManagerHelper;
@@ -317,9 +319,9 @@
 
                     // We can only query for shortcuts when the user is unlocked.
                     if (userUnlocked) {
-                        List<ShortcutInfo> pinnedShortcuts =
+                        DeepShortcutManager.QueryResult pinnedShortcuts =
                                 mShortcutManager.queryForPinnedShortcuts(null, user);
-                        if (mShortcutManager.wasLastCallSuccess()) {
+                        if (pinnedShortcuts.wasSuccess()) {
                             for (ShortcutInfo shortcut : pinnedShortcuts) {
                                 shortcutKeyToPinnedShortcuts.put(ShortcutKey.fromInfo(shortcut),
                                         shortcut);
@@ -531,7 +533,7 @@
                                 info.spanX = 1;
                                 info.spanY = 1;
                                 info.runtimeStatusFlags |= disabledState;
-                                if (isSafeMode && !Utilities.isSystemApp(context, intent)) {
+                                if (isSafeMode && !isSystemApp(context, intent)) {
                                     info.runtimeStatusFlags |= FLAG_DISABLED_SAFEMODE;
                                 }
 
@@ -579,10 +581,19 @@
 
                             int appWidgetId = c.getInt(appWidgetIdIndex);
                             String savedProvider = c.getString(appWidgetProviderIndex);
+                            final ComponentName component;
 
-                            final ComponentName component =
-                                    ComponentName.unflattenFromString(savedProvider);
-
+                            boolean isSearchWidget = (c.getInt(optionsIndex)
+                                    & LauncherAppWidgetInfo.OPTION_SEARCH_WIDGET) != 0;
+                            if (isSearchWidget) {
+                                component  = QsbContainerView.getSearchComponentName(context);
+                                if (component == null) {
+                                    c.markDeleted("Discarding SearchWidget without packagename ");
+                                    continue;
+                                }
+                            } else {
+                                component = ComponentName.unflattenFromString(savedProvider);
+                            }
                             final boolean isIdValid = !c.hasRestoreFlag(
                                     LauncherAppWidgetInfo.FLAG_ID_NOT_VALID);
                             final boolean wasProviderReady = !c.hasRestoreFlag(
@@ -592,9 +603,7 @@
                                 widgetProvidersMap = mAppWidgetManager.getAllProvidersMap();
                             }
                             final AppWidgetProviderInfo provider = widgetProvidersMap.get(
-                                    new ComponentKey(
-                                            ComponentName.unflattenFromString(savedProvider),
-                                            c.user));
+                                    new ComponentKey(component, c.user));
 
                             final boolean isProviderReady = isValidProvider(provider);
                             if (!isSafeMode && !customWidget &&
@@ -658,6 +667,7 @@
                                 c.applyCommonProperties(appWidgetInfo);
                                 appWidgetInfo.spanX = c.getInt(spanXIndex);
                                 appWidgetInfo.spanY = c.getInt(spanYIndex);
+                                appWidgetInfo.options = c.getInt(optionsIndex);
                                 appWidgetInfo.user = c.user;
 
                                 if (appWidgetInfo.spanX <= 0 || appWidgetInfo.spanY <= 0) {
@@ -703,7 +713,7 @@
                     }
                 }
             } finally {
-                Utilities.closeSilently(c);
+                IOUtils.closeSilently(c);
             }
 
             // Break early if we've stopped loading
@@ -743,8 +753,8 @@
             }
 
             // Sort the folder items, update ranks, and make sure all preview items are high res.
-            FolderIconPreviewVerifier verifier =
-                    new FolderIconPreviewVerifier(mApp.getInvariantDeviceProfile());
+            FolderGridOrganizer verifier =
+                    new FolderGridOrganizer(mApp.getInvariantDeviceProfile());
             for (FolderInfo folder : mBgDataModel.folders) {
                 Collections.sort(folder.contents, Folder.ITEM_POS_COMPARATOR);
                 verifier.setFolderInfo(folder);
@@ -771,7 +781,7 @@
                         new SdCardAvailableReceiver(mApp, pendingPackages),
                         new IntentFilter(Intent.ACTION_BOOT_COMPLETED),
                         null,
-                        new Handler(LauncherModel.getWorkerLooper()));
+                        MODEL_EXECUTOR.getHandler());
             }
         }
     }
@@ -829,7 +839,7 @@
             }
         }
 
-        mBgAllAppsList.added = new ArrayList<>();
+        mBgAllAppsList.getAndResetChangeFlag();
         return allActivityList;
     }
 
diff --git a/src/com/android/launcher3/model/ModelPreload.java b/src/com/android/launcher3/model/ModelPreload.java
index b353810..2bd6cd4 100644
--- a/src/com/android/launcher3/model/ModelPreload.java
+++ b/src/com/android/launcher3/model/ModelPreload.java
@@ -18,7 +18,6 @@
 import android.content.Context;
 import android.util.Log;
 
-import com.android.launcher3.AllAppsList;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherModel;
 import com.android.launcher3.LauncherModel.ModelUpdateTask;
diff --git a/src/com/android/launcher3/model/ModelWriter.java b/src/com/android/launcher3/model/ModelWriter.java
index 4ce2f4b..b7a19d3 100644
--- a/src/com/android/launcher3/model/ModelWriter.java
+++ b/src/com/android/launcher3/model/ModelWriter.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3.model;
 
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+
 import android.content.ContentProviderOperation;
 import android.content.ContentResolver;
 import android.content.ContentValues;
@@ -31,17 +33,16 @@
 import com.android.launcher3.LauncherAppWidgetHost;
 import com.android.launcher3.LauncherAppWidgetInfo;
 import com.android.launcher3.LauncherModel;
-import com.android.launcher3.LauncherModel.Callbacks;
 import com.android.launcher3.LauncherProvider;
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.LauncherSettings.Settings;
-import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.Utilities;
+import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.config.FeatureFlags;
+import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.util.ContentWriter;
 import com.android.launcher3.util.ItemInfoMatcher;
-import com.android.launcher3.util.LooperExecutor;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -61,7 +62,6 @@
     private final BgDataModel mBgDataModel;
     private final Handler mUiHandler;
 
-    private final Executor mWorkerExecutor;
     private final boolean mHasVerticalHotseat;
     private final boolean mVerifyChanges;
 
@@ -74,7 +74,6 @@
         mContext = context;
         mModel = model;
         mBgDataModel = dataModel;
-        mWorkerExecutor = new LooperExecutor(LauncherModel.getWorkerLooper());
         mHasVerticalHotseat = hasVerticalHotseat;
         mVerifyChanges = verifyChanges;
         mUiHandler = new Handler(Looper.getMainLooper());
@@ -194,7 +193,7 @@
         item.spanX = spanX;
         item.spanY = spanY;
 
-        mWorkerExecutor.execute(new UpdateItemRunnable(item, () ->
+        ((Executor) MODEL_EXECUTOR).execute(new UpdateItemRunnable(item, () ->
                 new ContentWriter(mContext)
                         .put(Favorites.CONTAINER, item.container)
                         .put(Favorites.CELLX, item.cellX)
@@ -209,7 +208,7 @@
      * Update an item to the database in a specified container.
      */
     public void updateItemInDatabase(ItemInfo item) {
-        mWorkerExecutor.execute(new UpdateItemRunnable(item, () -> {
+        ((Executor) MODEL_EXECUTOR).execute(new UpdateItemRunnable(item, () -> {
             ContentWriter writer = new ContentWriter(mContext);
             item.onAddToDatabase(writer);
             return writer;
@@ -229,7 +228,7 @@
 
         ModelVerifier verifier = new ModelVerifier();
         final StackTraceElement[] stackTrace = new Throwable().getStackTrace();
-        mWorkerExecutor.execute(() -> {
+        ((Executor) MODEL_EXECUTOR).execute(() -> {
             // Write the item on background thread, as some properties might have been updated in
             // the background.
             final ContentWriter writer = new ContentWriter(mContext);
@@ -333,14 +332,14 @@
         if (mPreparingToUndo) {
             mDeleteRunnables.add(r);
         } else {
-            mWorkerExecutor.execute(r);
+            ((Executor) MODEL_EXECUTOR).execute(r);
         }
     }
 
     public void commitDelete() {
         mPreparingToUndo = false;
         for (Runnable runnable : mDeleteRunnables) {
-            mWorkerExecutor.execute(runnable);
+            ((Executor) MODEL_EXECUTOR).execute(runnable);
         }
         mDeleteRunnables.clear();
     }
diff --git a/src/com/android/launcher3/model/PackageInstallStateChangedTask.java b/src/com/android/launcher3/model/PackageInstallStateChangedTask.java
index 9fcab38..802cbc7 100644
--- a/src/com/android/launcher3/model/PackageInstallStateChangedTask.java
+++ b/src/com/android/launcher3/model/PackageInstallStateChangedTask.java
@@ -19,20 +19,18 @@
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 
-import com.android.launcher3.AllAppsList;
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherAppWidgetInfo;
 import com.android.launcher3.LauncherModel.CallbackTask;
-import com.android.launcher3.LauncherModel.Callbacks;
+import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.PromiseAppInfo;
 import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.compat.PackageInstallerCompat;
 import com.android.launcher3.compat.PackageInstallerCompat.PackageInstallInfo;
 import com.android.launcher3.util.InstantAppResolver;
 
-import java.util.ArrayList;
 import java.util.HashSet;
 
 /**
@@ -65,41 +63,11 @@
         }
 
         synchronized (apps) {
-            PromiseAppInfo updated = null;
-            final ArrayList<AppInfo> removed = new ArrayList<>();
-            for (int i=0; i < apps.size(); i++) {
-                final AppInfo appInfo = apps.get(i);
-                final ComponentName tgtComp = appInfo.getTargetComponent();
-                if (tgtComp != null && tgtComp.getPackageName().equals(mInstallInfo.packageName)) {
-                    if (appInfo instanceof PromiseAppInfo) {
-                        final PromiseAppInfo promiseAppInfo = (PromiseAppInfo) appInfo;
-                        if (mInstallInfo.state == PackageInstallerCompat.STATUS_INSTALLING) {
-                            promiseAppInfo.level = mInstallInfo.progress;
-                            updated = promiseAppInfo;
-                        } else if (mInstallInfo.state == PackageInstallerCompat.STATUS_FAILED) {
-                            apps.removePromiseApp(appInfo);
-                            removed.add(appInfo);
-                        }
-                    }
-                }
-            }
+            PromiseAppInfo updated = apps.updatePromiseInstallInfo(mInstallInfo);
             if (updated != null) {
-                final PromiseAppInfo updatedPromiseApp = updated;
-                scheduleCallbackTask(new CallbackTask() {
-                    @Override
-                    public void execute(Callbacks callbacks) {
-                        callbacks.bindPromiseAppProgressUpdated(updatedPromiseApp);
-                    }
-                });
+                scheduleCallbackTask(c -> c.bindPromiseAppProgressUpdated(updated));
             }
-            if (!removed.isEmpty()) {
-                scheduleCallbackTask(new CallbackTask() {
-                    @Override
-                    public void execute(Callbacks callbacks) {
-                        callbacks.bindAppInfosRemoved(removed);
-                    }
-                });
-            }
+            bindApplicationsIfNeeded();
         }
 
         synchronized (dataModel) {
diff --git a/src/com/android/launcher3/model/PackageItemInfo.java b/src/com/android/launcher3/model/PackageItemInfo.java
index baeaa94..741be66 100644
--- a/src/com/android/launcher3/model/PackageItemInfo.java
+++ b/src/com/android/launcher3/model/PackageItemInfo.java
@@ -32,8 +32,17 @@
         this.packageName = packageName;
     }
 
+    public PackageItemInfo(PackageItemInfo copy) {
+        this.packageName = copy.packageName;
+    }
+
     @Override
     protected String dumpProperties() {
         return super.dumpProperties() + " packageName=" + packageName;
     }
+
+    @Override
+    public PackageItemInfo clone() {
+        return new PackageItemInfo(this);
+    }
 }
diff --git a/src/com/android/launcher3/model/PackageUpdatedTask.java b/src/com/android/launcher3/model/PackageUpdatedTask.java
index 4428c8e..e6a1a0b 100644
--- a/src/com/android/launcher3/model/PackageUpdatedTask.java
+++ b/src/com/android/launcher3/model/PackageUpdatedTask.java
@@ -23,23 +23,19 @@
 import android.os.UserHandle;
 import android.util.Log;
 
-import com.android.launcher3.AllAppsList;
-import com.android.launcher3.AppInfo;
-import com.android.launcher3.WorkspaceItemInfo;
-import com.android.launcher3.icons.IconCache;
 import com.android.launcher3.InstallShortcutReceiver;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherAppWidgetInfo;
-import com.android.launcher3.LauncherModel.CallbackTask;
-import com.android.launcher3.LauncherModel.Callbacks;
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.SessionCommitReceiver;
 import com.android.launcher3.Utilities;
+import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.compat.UserManagerCompat;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.icons.BitmapInfo;
+import com.android.launcher3.icons.IconCache;
 import com.android.launcher3.icons.LauncherIcons;
 import com.android.launcher3.logging.FileLog;
 import com.android.launcher3.shortcuts.DeepShortcutManager;
@@ -49,6 +45,7 @@
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.PackageUserKey;
+import com.android.launcher3.util.SafeCloseable;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -100,6 +97,8 @@
         FlagOp flagOp = FlagOp.NO_OP;
         final HashSet<String> packageSet = new HashSet<>(Arrays.asList(packages));
         ItemInfoMatcher matcher = ItemInfoMatcher.ofPackages(packageSet, mUser);
+        final HashSet<ComponentName> removedComponents = new HashSet<>();
+
         switch (mOp) {
             case OP_ADD: {
                 for (int i = 0; i < N; i++) {
@@ -119,11 +118,14 @@
                 break;
             }
             case OP_UPDATE:
-                for (int i = 0; i < N; i++) {
-                    if (DEBUG) Log.d(TAG, "mAllAppsList.updatePackage " + packages[i]);
-                    iconCache.updateIconsForPkg(packages[i], mUser);
-                    appsList.updatePackage(context, packages[i], mUser);
-                    app.getWidgetCache().removePackage(packages[i], mUser);
+                try (SafeCloseable t =
+                             appsList.trackRemoves(a -> removedComponents.add(a.componentName))) {
+                    for (int i = 0; i < N; i++) {
+                        if (DEBUG) Log.d(TAG, "mAllAppsList.updatePackage " + packages[i]);
+                        iconCache.updateIconsForPkg(packages[i], mUser);
+                        appsList.updatePackage(context, packages[i], mUser);
+                        app.getWidgetCache().removePackage(packages[i], mUser);
+                    }
                 }
                 // Since package was just updated, the target must be available now.
                 flagOp = FlagOp.removeFlag(WorkspaceItemInfo.FLAG_DISABLED_NOT_AVAILABLE);
@@ -160,23 +162,7 @@
                 break;
         }
 
-        final ArrayList<AppInfo> addedOrModified = new ArrayList<>();
-        addedOrModified.addAll(appsList.added);
-        appsList.added.clear();
-        addedOrModified.addAll(appsList.modified);
-        appsList.modified.clear();
-        if (!addedOrModified.isEmpty()) {
-            scheduleCallbackTask((callbacks) -> callbacks.bindAppsAddedOrUpdated(addedOrModified));
-        }
-
-        final ArrayList<AppInfo> removedApps = new ArrayList<>(appsList.removed);
-        appsList.removed.clear();
-        final HashSet<ComponentName> removedComponents = new HashSet<>();
-        if (mOp == OP_UPDATE) {
-            for (AppInfo ai : removedApps) {
-                removedComponents.add(ai.componentName);
-            }
-        }
+        bindApplicationsIfNeeded();
 
         final IntSparseArrayMap<Boolean> removedShortcuts = new IntSparseArrayMap<>();
 
@@ -302,12 +288,7 @@
             }
 
             if (!widgets.isEmpty()) {
-                scheduleCallbackTask(new CallbackTask() {
-                    @Override
-                    public void execute(Callbacks callbacks) {
-                        callbacks.bindWidgetsRestored(widgets);
-                    }
-                });
+                scheduleCallbackTask(c -> c.bindWidgetsRestored(widgets));
             }
         }
 
@@ -338,16 +319,6 @@
             InstallShortcutReceiver.removeFromInstallQueue(context, removedPackages, mUser);
         }
 
-        if (!removedApps.isEmpty()) {
-            // Remove corresponding apps from All-Apps
-            scheduleCallbackTask(new CallbackTask() {
-                @Override
-                public void execute(Callbacks callbacks) {
-                    callbacks.bindAppInfosRemoved(removedApps);
-                }
-            });
-        }
-
         if (Utilities.ATLEAST_OREO && mOp == OP_ADD) {
             // Load widgets for the new package. Changes due to app updates are handled through
             // AppWidgetHost events, this is just to initialize the long-press options.
diff --git a/src/com/android/launcher3/model/ShortcutsChangedTask.java b/src/com/android/launcher3/model/ShortcutsChangedTask.java
index 8528228..c3cd9d0 100644
--- a/src/com/android/launcher3/model/ShortcutsChangedTask.java
+++ b/src/com/android/launcher3/model/ShortcutsChangedTask.java
@@ -19,7 +19,6 @@
 import android.content.pm.ShortcutInfo;
 import android.os.UserHandle;
 
-import com.android.launcher3.AllAppsList;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherSettings;
diff --git a/src/com/android/launcher3/model/UserLockStateChangedTask.java b/src/com/android/launcher3/model/UserLockStateChangedTask.java
index 2cb256e..4b773d7 100644
--- a/src/com/android/launcher3/model/UserLockStateChangedTask.java
+++ b/src/com/android/launcher3/model/UserLockStateChangedTask.java
@@ -21,7 +21,6 @@
 import android.content.pm.ShortcutInfo;
 import android.os.UserHandle;
 
-import com.android.launcher3.AllAppsList;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherSettings;
@@ -37,7 +36,6 @@
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
-import java.util.List;
 
 /**
  * Task to handle changing of lock state of the user
@@ -58,9 +56,9 @@
 
         HashMap<ShortcutKey, ShortcutInfo> pinnedShortcuts = new HashMap<>();
         if (isUserUnlocked) {
-            List<ShortcutInfo> shortcuts =
+            DeepShortcutManager.QueryResult shortcuts =
                     deepShortcutManager.queryForPinnedShortcuts(null, mUser);
-            if (deepShortcutManager.wasLastCallSuccess()) {
+            if (shortcuts.wasSuccess()) {
                 for (ShortcutInfo shortcut : shortcuts) {
                     pinnedShortcuts.put(ShortcutKey.fromInfo(shortcut), shortcut);
                 }
diff --git a/src/com/android/launcher3/notification/NotificationListener.java b/src/com/android/launcher3/notification/NotificationListener.java
index e57a051..10378ee 100644
--- a/src/com/android/launcher3/notification/NotificationListener.java
+++ b/src/com/android/launcher3/notification/NotificationListener.java
@@ -16,6 +16,7 @@
 
 package com.android.launcher3.notification;
 
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
 import static com.android.launcher3.util.SecureSettingsObserver.newNotificationSettingsObserver;
 
 import android.annotation.TargetApi;
@@ -31,7 +32,8 @@
 import android.util.Log;
 import android.util.Pair;
 
-import com.android.launcher3.LauncherModel;
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.PackageUserKey;
 import com.android.launcher3.util.SecureSettingsObserver;
@@ -43,8 +45,6 @@
 import java.util.List;
 import java.util.Map;
 
-import androidx.annotation.Nullable;
-
 /**
  * A {@link NotificationListenerService} that sends updates to its
  * {@link NotificationsChangedListener} when notifications are posted or canceled,
@@ -141,7 +141,7 @@
 
     public NotificationListener() {
         super();
-        mWorkerHandler = new Handler(LauncherModel.getWorkerLooper(), mWorkerCallback);
+        mWorkerHandler = new Handler(MODEL_EXECUTOR.getLooper(), mWorkerCallback);
         mUiHandler = new Handler(Looper.getMainLooper(), mUiCallback);
         sNotificationListenerInstance = this;
     }
diff --git a/src/com/android/launcher3/popup/PopupContainerWithArrow.java b/src/com/android/launcher3/popup/PopupContainerWithArrow.java
index baaad65..2a40d68 100644
--- a/src/com/android/launcher3/popup/PopupContainerWithArrow.java
+++ b/src/com/android/launcher3/popup/PopupContainerWithArrow.java
@@ -24,6 +24,7 @@
 import static com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
 import static com.android.launcher3.userevent.nano.LauncherLogProto.ItemType;
 import static com.android.launcher3.userevent.nano.LauncherLogProto.Target;
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
 
 import android.animation.AnimatorSet;
 import android.animation.LayoutTransition;
@@ -36,7 +37,6 @@
 import android.os.Handler;
 import android.os.Looper;
 import android.util.AttributeSet;
-import android.util.Log;
 import android.util.Pair;
 import android.view.MotionEvent;
 import android.view.View;
@@ -51,9 +51,7 @@
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.ItemInfoWithIcon;
 import com.android.launcher3.Launcher;
-import com.android.launcher3.LauncherModel;
 import com.android.launcher3.R;
-import com.android.launcher3.Utilities;
 import com.android.launcher3.accessibility.LauncherAccessibilityDelegate;
 import com.android.launcher3.accessibility.ShortcutMenuAccessibilityDelegate;
 import com.android.launcher3.dot.DotInfo;
@@ -65,10 +63,8 @@
 import com.android.launcher3.notification.NotificationItemView;
 import com.android.launcher3.notification.NotificationKeyData;
 import com.android.launcher3.popup.PopupDataProvider.PopupDataChangeListener;
-import com.android.launcher3.shortcuts.DeepShortcutManager;
 import com.android.launcher3.shortcuts.DeepShortcutView;
 import com.android.launcher3.shortcuts.ShortcutDragPreviewProvider;
-import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.touch.ItemClickHandler;
 import com.android.launcher3.touch.ItemLongClickListener;
 import com.android.launcher3.util.PackageUserKey;
@@ -170,7 +166,10 @@
     }
 
     public OnClickListener getItemClickListener() {
-        return ItemClickHandler.INSTANCE;
+        return (view) -> {
+            ItemClickHandler.INSTANCE.onClick(view);
+            close(true);
+        };
     }
 
     @Override
@@ -307,8 +306,7 @@
         setLayoutTransition(new LayoutTransition());
 
         // Load the shortcuts on a background thread and update the container as it animates.
-        final Looper workerLooper = LauncherModel.getWorkerLooper();
-        new Handler(workerLooper).postAtFrontOfQueue(PopupPopulator.createUpdateRunnable(
+        MODEL_EXECUTOR.getHandler().postAtFrontOfQueue(PopupPopulator.createUpdateRunnable(
                 mLauncher, originalItemInfo, new Handler(Looper.getMainLooper()),
                 this, mShortcuts, notificationKeys));
     }
@@ -569,9 +567,9 @@
 
     @Override
     protected void closeComplete() {
-        super.closeComplete();
         mOriginalIcon.setTextVisibility(mOriginalIcon.shouldTextBeVisible());
         mOriginalIcon.forceHideDot(false);
+        super.closeComplete();
     }
 
     @Override
diff --git a/src/com/android/launcher3/popup/SystemShortcut.java b/src/com/android/launcher3/popup/SystemShortcut.java
index 78bd81b..a87b7b8 100644
--- a/src/com/android/launcher3/popup/SystemShortcut.java
+++ b/src/com/android/launcher3/popup/SystemShortcut.java
@@ -1,14 +1,11 @@
 package com.android.launcher3.popup;
 
-import static com.android.launcher3.userevent.nano.LauncherLogProto.Action;
-import static com.android.launcher3.userevent.nano.LauncherLogProto.ControlType;
 
 import android.app.ActivityOptions;
 import android.content.Context;
 import android.content.Intent;
 import android.graphics.Rect;
 import android.graphics.drawable.Icon;
-import android.os.Bundle;
 import android.os.Handler;
 import android.os.Looper;
 import android.view.View;
@@ -20,23 +17,30 @@
 import com.android.launcher3.BaseDraggingActivity;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.R;
 import com.android.launcher3.WorkspaceItemInfo;
+import com.android.launcher3.config.FeatureFlags;
+import com.android.launcher3.model.AppLaunchTracker;
 import com.android.launcher3.model.WidgetItem;
+import com.android.launcher3.userevent.nano.LauncherLogProto.Action;
+import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
+import com.android.launcher3.userevent.nano.LauncherLogProto.ControlType;
 import com.android.launcher3.util.InstantAppResolver;
 import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.PackageUserKey;
 import com.android.launcher3.widget.WidgetsBottomSheet;
 
 import java.util.List;
-
 /**
  * Represents a system shortcut for a given app. The shortcut should have a label and icon, and an
  * onClickListener that depends on the item that the shortcut services.
  *
  * Example system shortcuts, defined as inner classes, include Widgets and AppInfo.
+ * @param <T>
  */
-public abstract class SystemShortcut<T extends BaseDraggingActivity> extends ItemInfo {
+public abstract class SystemShortcut<T extends BaseDraggingActivity>
+        extends ItemInfo {
     private final int mIconResId;
     private final int mLabelResId;
     private final Icon mIcon;
@@ -202,6 +206,27 @@
         }
     }
 
+    public static class DismissPrediction extends SystemShortcut<Launcher> {
+        public DismissPrediction() {
+            super(R.drawable.ic_remove_no_shadow, R.string.dismiss_prediction_label);
+        }
+
+        @Override
+        public View.OnClickListener getOnClickListener(Launcher activity, ItemInfo itemInfo) {
+            if (!FeatureFlags.ENABLE_PREDICTION_DISMISS.get()) return null;
+            if (itemInfo.container != LauncherSettings.Favorites.CONTAINER_PREDICTION) return null;
+            return (view) -> {
+                PopupContainerWithArrow.closeAllOpenViews(activity);
+                activity.getUserEventDispatcher().logActionOnControl(Action.Touch.TAP,
+                        ControlType.DISMISS_PREDICTION, ContainerType.DEEPSHORTCUTS);
+                AppLaunchTracker.INSTANCE.get(view.getContext())
+                        .onDismissApp(itemInfo.getTargetComponent(),
+                                itemInfo.user,
+                                AppLaunchTracker.CONTAINER_PREDICTIONS);
+            };
+        }
+    }
+
     protected static void dismissTaskMenuView(BaseDraggingActivity activity) {
         AbstractFloatingView.closeOpenViews(activity, true,
             AbstractFloatingView.TYPE_ALL & ~AbstractFloatingView.TYPE_REBIND_SAFE);
diff --git a/src/com/android/launcher3/popup/SystemShortcutFactory.java b/src/com/android/launcher3/popup/SystemShortcutFactory.java
index 37a2092..dfcc2f8 100644
--- a/src/com/android/launcher3/popup/SystemShortcutFactory.java
+++ b/src/com/android/launcher3/popup/SystemShortcutFactory.java
@@ -39,7 +39,9 @@
     @SuppressWarnings("unused")
     public SystemShortcutFactory() {
         this(new SystemShortcut.AppInfo(),
-                new SystemShortcut.Widgets(), new SystemShortcut.Install());
+                new SystemShortcut.Widgets(),
+                new SystemShortcut.Install(),
+                new SystemShortcut.DismissPrediction());
     }
 
     protected SystemShortcutFactory(SystemShortcut... shortcuts) {
@@ -53,6 +55,7 @@
                 systemShortcuts.add(systemShortcut);
             }
         }
+
         return systemShortcuts;
     }
 }
diff --git a/src/com/android/launcher3/provider/ImportDataTask.java b/src/com/android/launcher3/provider/ImportDataTask.java
index 7b62f53..970a03e 100644
--- a/src/com/android/launcher3/provider/ImportDataTask.java
+++ b/src/com/android/launcher3/provider/ImportDataTask.java
@@ -42,7 +42,6 @@
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.LauncherSettings.Settings;
-import com.android.launcher3.Utilities;
 import com.android.launcher3.Workspace;
 import com.android.launcher3.compat.UserManagerCompat;
 import com.android.launcher3.config.FeatureFlags;
@@ -50,6 +49,7 @@
 import com.android.launcher3.model.GridSizeMigrationTask;
 import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.IntSparseArrayMap;
+import com.android.launcher3.util.PackageManagerHelper;
 
 import java.net.URISyntaxException;
 import java.util.ArrayList;
@@ -223,7 +223,7 @@
                     case Favorites.ITEM_TYPE_SHORTCUT:
                     case Favorites.ITEM_TYPE_APPLICATION: {
                         intent = Intent.parseUri(c.getString(intentIndex), 0);
-                        if (Utilities.isLauncherAppTarget(intent)) {
+                        if (PackageManagerHelper.isLauncherAppTarget(intent)) {
                             type = Favorites.ITEM_TYPE_APPLICATION;
                         } else {
                             values.put(Favorites.ICON_PACKAGE, c.getString(iconPackageIndex));
diff --git a/src/com/android/launcher3/provider/RestoreDbTask.java b/src/com/android/launcher3/provider/RestoreDbTask.java
index 3c0c5fd..0a2d4e3 100644
--- a/src/com/android/launcher3/provider/RestoreDbTask.java
+++ b/src/com/android/launcher3/provider/RestoreDbTask.java
@@ -16,8 +16,6 @@
 
 package com.android.launcher3.provider;
 
-import static com.android.launcher3.Utilities.getIntArrayFromString;
-import static com.android.launcher3.Utilities.getStringFromIntArray;
 import static com.android.launcher3.provider.LauncherDbUtils.dropTable;
 
 import android.app.backup.BackupManager;
@@ -40,6 +38,7 @@
 import com.android.launcher3.Utilities;
 import com.android.launcher3.logging.FileLog;
 import com.android.launcher3.provider.LauncherDbUtils.SQLiteTransaction;
+import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.LogConfig;
 
 import java.io.InvalidObjectException;
@@ -246,8 +245,8 @@
         SharedPreferences prefs = Utilities.getPrefs(context);
         if (prefs.contains(APPWIDGET_OLD_IDS) && prefs.contains(APPWIDGET_IDS)) {
             AppWidgetsRestoredReceiver.restoreAppWidgetIds(context,
-                    getIntArrayFromString(prefs.getString(APPWIDGET_OLD_IDS, "")),
-                    getIntArrayFromString(prefs.getString(APPWIDGET_IDS, "")));
+                    IntArray.fromConcatString(prefs.getString(APPWIDGET_OLD_IDS, "")).toArray(),
+                    IntArray.fromConcatString(prefs.getString(APPWIDGET_IDS, "")).toArray());
         } else {
             FileLog.d(TAG, "No app widget ids to restore.");
         }
@@ -259,8 +258,8 @@
     public static void setRestoredAppWidgetIds(Context context, @NonNull int[] oldIds,
             @NonNull int[] newIds) {
         Utilities.getPrefs(context).edit()
-                .putString(APPWIDGET_OLD_IDS, getStringFromIntArray(oldIds))
-                .putString(APPWIDGET_IDS, getStringFromIntArray(newIds))
+                .putString(APPWIDGET_OLD_IDS, IntArray.wrap(oldIds).toConcatString())
+                .putString(APPWIDGET_IDS, IntArray.wrap(newIds).toConcatString())
                 .commit();
     }
 
diff --git a/src/com/android/launcher3/qsb/QsbContainerView.java b/src/com/android/launcher3/qsb/QsbContainerView.java
index 857ea05..0eb4285 100644
--- a/src/com/android/launcher3/qsb/QsbContainerView.java
+++ b/src/com/android/launcher3/qsb/QsbContainerView.java
@@ -32,12 +32,16 @@
 import android.content.Intent;
 import android.graphics.Rect;
 import android.os.Bundle;
+import android.provider.Settings;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.AppWidgetResizeFrame;
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.LauncherAppState;
@@ -55,6 +59,74 @@
  */
 public class QsbContainerView extends FrameLayout {
 
+    public static final String SEARCH_PROVIDER_SETTINGS_KEY = "SEARCH_PROVIDER_PACKAGE_NAME";
+
+    /**
+     * Returns the package name for user configured search provider or from searchManager
+     * @param context
+     * @return String
+     */
+    @Nullable
+    public static String getSearchWidgetPackageName(@NonNull Context context) {
+        String providerPkg = Settings.Global.getString(context.getContentResolver(),
+                SEARCH_PROVIDER_SETTINGS_KEY);
+        if (providerPkg == null) {
+            SearchManager searchManager = context.getSystemService(SearchManager.class);
+            ComponentName componentName = searchManager.getGlobalSearchActivity();
+            if (componentName != null) {
+                providerPkg = searchManager.getGlobalSearchActivity().getPackageName();
+            }
+        }
+        return providerPkg;
+    }
+
+    /**
+     * returns it's AppWidgetProviderInfo using package name from getSearchWidgetPackageName
+     * @param context
+     * @return AppWidgetProviderInfo
+     */
+    @Nullable
+    public static AppWidgetProviderInfo getSearchWidgetProviderInfo(@NonNull Context context) {
+        String providerPkg = getSearchWidgetPackageName(context);
+        if (providerPkg == null) {
+            return null;
+        }
+
+        AppWidgetProviderInfo defaultWidgetForSearchPackage = null;
+        AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
+        for (AppWidgetProviderInfo info :
+                appWidgetManager.getInstalledProvidersForPackage(providerPkg, null)) {
+            if (info.provider.getPackageName().equals(providerPkg) && info.configure == null) {
+                if ((info.widgetCategory
+                        & AppWidgetProviderInfo.WIDGET_CATEGORY_SEARCHBOX) != 0) {
+                    return info;
+                } else if (defaultWidgetForSearchPackage == null) {
+                    defaultWidgetForSearchPackage = info;
+                }
+            }
+        }
+        return defaultWidgetForSearchPackage;
+    }
+
+    /**
+     * returns componentName for searchWidget if package name is known.
+     */
+    @Nullable
+    public static ComponentName getSearchComponentName(@NonNull  Context context) {
+        AppWidgetProviderInfo providerInfo =
+                QsbContainerView.getSearchWidgetProviderInfo(context);
+        if (providerInfo != null) {
+            return providerInfo.provider;
+        } else {
+            String pkgName = QsbContainerView.getSearchWidgetPackageName(context);
+            if (pkgName != null) {
+                //we don't know the class name yet. we'll put the package name as placeholder
+                return new ComponentName(pkgName, pkgName);
+            }
+            return null;
+        }
+    }
+
     public QsbContainerView(Context context) {
         super(context);
     }
@@ -101,7 +173,7 @@
 
         protected QsbWidgetHost createHost() {
             return new QsbWidgetHost(getContext(), QSB_WIDGET_HOST_ID,
-                    (c) -> new QsbWidgetHostView(c));
+                    (c) -> new QsbWidgetHostView(c), this::rebindFragment);
         }
 
         private FrameLayout mWrapper;
@@ -111,9 +183,9 @@
                 LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 
             mWrapper = new FrameLayout(getContext());
-
             // Only add the view when enabled
             if (isQsbEnabled()) {
+                mQsbWidgetHost.startListening();
                 mWrapper.addView(createQsb(mWrapper));
             }
             return mWrapper;
@@ -155,7 +227,8 @@
             }
 
             if (isWidgetBound) {
-                mQsb = (QsbWidgetHostView) mQsbWidgetHost.createView(context, widgetId, mWidgetInfo);
+                mQsb = (QsbWidgetHostView) mQsbWidgetHost.createView(context, widgetId,
+                        mWidgetInfo);
                 mQsb.setId(R.id.qsb_widget);
 
                 if (!isInPreviewMode()) {
@@ -163,7 +236,6 @@
                             .getAppWidgetOptions(widgetId), opts)) {
                         mQsb.updateAppWidgetOptions(opts);
                     }
-                    mQsbWidgetHost.startListening();
                 }
                 return mQsb;
             }
@@ -246,43 +318,32 @@
             return v;
         }
 
+
         /**
          * Returns a widget with category {@link AppWidgetProviderInfo#WIDGET_CATEGORY_SEARCHBOX}
-         * provided by the same package which is set to be global search activity.
+         * provided by the package from getSearchProviderPackageName
          * If widgetCategory is not supported, or no such widget is found, returns the first widget
          * provided by the package.
          */
         protected AppWidgetProviderInfo getSearchWidgetProvider() {
-            SearchManager searchManager =
-                    (SearchManager) getContext().getSystemService(Context.SEARCH_SERVICE);
-            ComponentName searchComponent = searchManager.getGlobalSearchActivity();
-            if (searchComponent == null) return null;
-            String providerPkg = searchComponent.getPackageName();
-
-            AppWidgetProviderInfo defaultWidgetForSearchPackage = null;
-
-            AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(getContext());
-            for (AppWidgetProviderInfo info : appWidgetManager.getInstalledProviders()) {
-                if (info.provider.getPackageName().equals(providerPkg) && info.configure == null) {
-                    if ((info.widgetCategory
-                            & AppWidgetProviderInfo.WIDGET_CATEGORY_SEARCHBOX) != 0) {
-                        return info;
-                    } else if (defaultWidgetForSearchPackage == null) {
-                        defaultWidgetForSearchPackage = info;
-                    }
-                }
-            }
-            return defaultWidgetForSearchPackage;
+            return getSearchWidgetProviderInfo(getContext());
         }
     }
 
     public static class QsbWidgetHost extends AppWidgetHost {
 
         private final WidgetViewFactory mViewFactory;
+        private final WidgetProvidersUpdateCallback mWidgetsUpdateCallback;
 
-        public QsbWidgetHost(Context context, int hostId, WidgetViewFactory viewFactory) {
+        public QsbWidgetHost(Context context, int hostId, WidgetViewFactory viewFactory,
+                WidgetProvidersUpdateCallback widgetProvidersUpdateCallback) {
             super(context, hostId);
             mViewFactory = viewFactory;
+            mWidgetsUpdateCallback = widgetProvidersUpdateCallback;
+        }
+
+        public QsbWidgetHost(Context context, int hostId, WidgetViewFactory viewFactory) {
+            this(context, hostId, viewFactory, null);
         }
 
         @Override
@@ -290,6 +351,14 @@
                 Context context, int appWidgetId, AppWidgetProviderInfo appWidget) {
             return mViewFactory.newView(context);
         }
+
+        @Override
+        protected void onProvidersChanged() {
+            super.onProvidersChanged();
+            if (mWidgetsUpdateCallback != null) {
+                mWidgetsUpdateCallback.onProvidersUpdated();
+            }
+        }
     }
 
     public interface WidgetViewFactory {
@@ -298,6 +367,17 @@
     }
 
     /**
+     * Callback interface for packages list update.
+     */
+    @FunctionalInterface
+    public interface WidgetProvidersUpdateCallback {
+        /**
+         * Gets called when widget providers list changes
+         */
+        void onProvidersUpdated();
+    }
+
+    /**
      * Returns true if {@param original} contains all entries defined in {@param updates} and
      * have the same value.
      * The comparison uses {@link Object#equals(Object)} to compare the values.
@@ -316,4 +396,5 @@
         }
         return true;
     }
+
 }
diff --git a/src/com/android/launcher3/states/InternalStateHandler.java b/src/com/android/launcher3/states/InternalStateHandler.java
index c6370c5..a23cd6d 100644
--- a/src/com/android/launcher3/states/InternalStateHandler.java
+++ b/src/com/android/launcher3/states/InternalStateHandler.java
@@ -15,6 +15,8 @@
  */
 package com.android.launcher3.states;
 
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+
 import android.content.Intent;
 import android.os.Binder;
 import android.os.Bundle;
@@ -22,8 +24,7 @@
 
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherAppState;
-import com.android.launcher3.LauncherModel.Callbacks;
-import com.android.launcher3.MainThreadExecutor;
+import com.android.launcher3.model.BgDataModel.Callbacks;
 
 import java.lang.ref.WeakReference;
 
@@ -94,16 +95,12 @@
     private static class Scheduler implements Runnable {
 
         private WeakReference<InternalStateHandler> mPendingHandler = new WeakReference<>(null);
-        private MainThreadExecutor mMainThreadExecutor;
 
         public void schedule(InternalStateHandler handler) {
             synchronized (this) {
                 mPendingHandler = new WeakReference<>(handler);
-                if (mMainThreadExecutor == null) {
-                    mMainThreadExecutor = new MainThreadExecutor();
-                }
             }
-            mMainThreadExecutor.execute(this);
+            MAIN_EXECUTOR.execute(this);
         }
 
         @Override
diff --git a/src/com/android/launcher3/testing/TestInformationHandler.java b/src/com/android/launcher3/testing/TestInformationHandler.java
index 4fd0f88..516c251 100644
--- a/src/com/android/launcher3/testing/TestInformationHandler.java
+++ b/src/com/android/launcher3/testing/TestInformationHandler.java
@@ -15,6 +15,8 @@
  */
 package com.android.launcher3.testing;
 
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+
 import android.content.Context;
 import android.os.Bundle;
 
@@ -23,7 +25,6 @@
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherState;
-import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.R;
 import com.android.launcher3.allapps.AllAppsStore;
 import com.android.launcher3.util.ResourceBasedOverride;
@@ -88,20 +89,20 @@
                 break;
 
             case TestProtocol.REQUEST_FREEZE_APP_LIST:
-                new MainThreadExecutor().execute(() ->
+                MAIN_EXECUTOR.execute(() ->
                         mLauncher.getAppsView().getAppsStore().enableDeferUpdates(
                                 AllAppsStore.DEFER_UPDATES_TEST));
                 break;
 
             case TestProtocol.REQUEST_UNFREEZE_APP_LIST:
-                new MainThreadExecutor().execute(() ->
+                MAIN_EXECUTOR.execute(() ->
                         mLauncher.getAppsView().getAppsStore().disableDeferUpdates(
                                 AllAppsStore.DEFER_UPDATES_TEST));
                 break;
 
             case TestProtocol.REQUEST_APP_LIST_FREEZE_FLAGS: {
                 try {
-                    final int deferUpdatesFlags = new MainThreadExecutor().submit(() ->
+                    final int deferUpdatesFlags = MAIN_EXECUTOR.submit(() ->
                             mLauncher.getAppsView().getAppsStore().getDeferUpdatesFlags()).get();
                     response.putInt(TestProtocol.TEST_INFO_RESPONSE_FIELD,
                             deferUpdatesFlags);
diff --git a/src/com/android/launcher3/touch/ItemLongClickListener.java b/src/com/android/launcher3/touch/ItemLongClickListener.java
index babbcdd..6cd2b2d 100644
--- a/src/com/android/launcher3/touch/ItemLongClickListener.java
+++ b/src/com/android/launcher3/touch/ItemLongClickListener.java
@@ -17,6 +17,7 @@
 
 import static android.view.View.INVISIBLE;
 import static android.view.View.VISIBLE;
+
 import static com.android.launcher3.LauncherState.ALL_APPS;
 import static com.android.launcher3.LauncherState.NORMAL;
 import static com.android.launcher3.LauncherState.OVERVIEW;
@@ -60,7 +61,7 @@
         if (info.container >= 0) {
             Folder folder = Folder.getOpen(launcher);
             if (folder != null) {
-                if (!folder.getItemsInReadingOrder().contains(v)) {
+                if (!folder.getIconsInReadingOrder().contains(v)) {
                     folder.close(true);
                 } else {
                     folder.startDrag(v, dragOptions);
diff --git a/src/com/android/launcher3/util/ConfigMonitor.java b/src/com/android/launcher3/util/ConfigMonitor.java
index 12d35e9..4ae84d8 100644
--- a/src/com/android/launcher3/util/ConfigMonitor.java
+++ b/src/com/android/launcher3/util/ConfigMonitor.java
@@ -16,6 +16,9 @@
  * limitations under the License.
  */
 
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
+
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -24,13 +27,10 @@
 import android.graphics.Point;
 import android.hardware.display.DisplayManager;
 import android.hardware.display.DisplayManager.DisplayListener;
-import android.os.Handler;
 import android.util.Log;
 import android.view.Display;
 import android.view.WindowManager;
 
-import com.android.launcher3.MainThreadExecutor;
-
 import java.util.function.Consumer;
 
 /**
@@ -78,7 +78,7 @@
 
         // Listen for display manager change
         mContext.getSystemService(DisplayManager.class)
-                .registerDisplayListener(this, new Handler(UiThreadHelper.getBackgroundLooper()));
+                .registerDisplayListener(this, UI_HELPER_EXECUTOR.getHandler());
     }
 
     @Override
@@ -122,7 +122,7 @@
         if (mCallback != null) {
             Consumer<Context> callback = mCallback;
             mCallback = null;
-            new MainThreadExecutor().execute(() -> callback.accept(mContext));
+            MAIN_EXECUTOR.execute(() -> callback.accept(mContext));
         }
     }
 
diff --git a/src/com/android/launcher3/util/DefaultDisplay.java b/src/com/android/launcher3/util/DefaultDisplay.java
index 7719f08..4080e21 100644
--- a/src/com/android/launcher3/util/DefaultDisplay.java
+++ b/src/com/android/launcher3/util/DefaultDisplay.java
@@ -15,6 +15,8 @@
  */
 package com.android.launcher3.util;
 
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
+
 import android.content.Context;
 import android.graphics.Point;
 import android.hardware.display.DisplayManager;
@@ -54,7 +56,7 @@
         mChangeHandler = new Handler(this::onChange);
 
         context.getSystemService(DisplayManager.class)
-                .registerDisplayListener(this, new Handler(UiThreadHelper.getBackgroundLooper()));
+                .registerDisplayListener(this, UI_HELPER_EXECUTOR.getHandler());
     }
 
     @Override
diff --git a/src/com/android/launcher3/util/Executors.java b/src/com/android/launcher3/util/Executors.java
new file mode 100644
index 0000000..4d5ee49
--- /dev/null
+++ b/src/com/android/launcher3/util/Executors.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.util;
+
+import android.os.HandlerThread;
+import android.os.Looper;
+import android.os.Process;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Various different executors used in Launcher
+ */
+public class Executors {
+
+    // These values are same as that in {@link AsyncTask}.
+    private static final int CPU_COUNT = Runtime.getRuntime().availableProcessors();
+    private static final int CORE_POOL_SIZE = CPU_COUNT + 1;
+    private static final int MAXIMUM_POOL_SIZE = CPU_COUNT * 2 + 1;
+    private static final int KEEP_ALIVE = 1;
+
+    /**
+     * An {@link Executor} to be used with async task with no limit on the queue size.
+     */
+    public static final Executor THREAD_POOL_EXECUTOR = new ThreadPoolExecutor(
+            CORE_POOL_SIZE, MAXIMUM_POOL_SIZE, KEEP_ALIVE,
+            TimeUnit.SECONDS, new LinkedBlockingQueue<>());
+
+    /**
+     * Returns the executor for running tasks on the main thread.
+     */
+    public static final LooperExecutor MAIN_EXECUTOR =
+            new LooperExecutor(Looper.getMainLooper());
+
+    /**
+     * A background executor for using time sensitive actions where user is waiting for response.
+     */
+    public static final LooperExecutor UI_HELPER_EXECUTOR =
+            new LooperExecutor(createAndStartNewForegroundLooper("UiThreadHelper"));
+
+    /**
+     * Utility method to get a started handler thread statically
+     */
+    public static Looper createAndStartNewLooper(String name) {
+        return createAndStartNewLooper(name, Process.THREAD_PRIORITY_DEFAULT);
+    }
+
+    /**
+     * Utility method to get a started handler thread statically with the provided priority
+     */
+    public static Looper createAndStartNewLooper(String name, int priority) {
+        HandlerThread thread = new HandlerThread(name, priority);
+        thread.start();
+        return thread.getLooper();
+    }
+
+    /**
+     * Similar to {@link #createAndStartNewLooper(String)}, but starts the thread with
+     * foreground priority.
+     * Think before using
+     */
+    public static Looper createAndStartNewForegroundLooper(String name) {
+        return createAndStartNewLooper(name, Process.THREAD_PRIORITY_FOREGROUND);
+    }
+
+    /**
+     * Executor used for running Launcher model related tasks (eg loading icons or updated db)
+     */
+    public static final LooperExecutor MODEL_EXECUTOR =
+            new LooperExecutor(createAndStartNewLooper("launcher-loader"));
+}
diff --git a/src/com/android/launcher3/util/IOUtils.java b/src/com/android/launcher3/util/IOUtils.java
index f95f74d..4a4a5ca 100644
--- a/src/com/android/launcher3/util/IOUtils.java
+++ b/src/com/android/launcher3/util/IOUtils.java
@@ -17,10 +17,13 @@
 package com.android.launcher3.util;
 
 import android.content.Context;
+import android.util.Log;
 
+import com.android.launcher3.Utilities;
 import com.android.launcher3.config.FeatureFlags;
 
 import java.io.ByteArrayOutputStream;
+import java.io.Closeable;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
@@ -35,6 +38,7 @@
 public class IOUtils {
 
     private static final int BUF_SIZE = 0x1000; // 4K
+    private static final String TAG = "IOUtils";
 
     public static byte[] toByteArray(File file) throws IOException {
         try (InputStream in = new FileInputStream(file)) {
@@ -77,4 +81,16 @@
         }
         return file.getAbsolutePath();
     }
+
+    public static void closeSilently(Closeable c) {
+        if (c != null) {
+            try {
+                c.close();
+            } catch (IOException e) {
+                if (FeatureFlags.IS_DOGFOOD_BUILD) {
+                    Log.d(TAG, "Error closing", e);
+                }
+            }
+        }
+    }
 }
diff --git a/src/com/android/launcher3/util/IntArray.java b/src/com/android/launcher3/util/IntArray.java
index d2a551f..7252f7a 100644
--- a/src/com/android/launcher3/util/IntArray.java
+++ b/src/com/android/launcher3/util/IntArray.java
@@ -17,6 +17,7 @@
 package com.android.launcher3.util;
 
 import java.util.Arrays;
+import java.util.StringTokenizer;
 
 /**
  * Copy of the platform hidden implementation of android.util.IntArray.
@@ -248,6 +249,17 @@
         return b.toString();
     }
 
+    public static IntArray fromConcatString(String concatString) {
+        StringTokenizer tokenizer = new StringTokenizer(concatString, ",");
+        int[] array = new int[tokenizer.countTokens()];
+        int count = 0;
+        while (tokenizer.hasMoreTokens()) {
+            array[count] = Integer.parseInt(tokenizer.nextToken().trim());
+            count++;
+        }
+        return new IntArray(array, array.length);
+    }
+
     /**
      * Throws {@link ArrayIndexOutOfBoundsException} if the index is out of bounds.
      *
diff --git a/src/com/android/launcher3/util/LooperExecutor.java b/src/com/android/launcher3/util/LooperExecutor.java
index cc07469..8ac600f 100644
--- a/src/com/android/launcher3/util/LooperExecutor.java
+++ b/src/com/android/launcher3/util/LooperExecutor.java
@@ -16,7 +16,9 @@
 package com.android.launcher3.util;
 
 import android.os.Handler;
+import android.os.HandlerThread;
 import android.os.Looper;
+import android.os.Process;
 
 import java.util.List;
 import java.util.concurrent.AbstractExecutorService;
@@ -47,6 +49,13 @@
     }
 
     /**
+     * Same as execute, but never runs the action inline.
+     */
+    public void post(Runnable runnable) {
+        mHandler.post(runnable);
+    }
+
+    /**
      * Not supported and throws an exception when used.
      */
     @Override
@@ -79,7 +88,31 @@
      */
     @Override
     @Deprecated
-    public boolean awaitTermination(long l, TimeUnit timeUnit) throws InterruptedException {
+    public boolean awaitTermination(long l, TimeUnit timeUnit) {
         throw new UnsupportedOperationException();
     }
+
+    /**
+     * Returns the thread for this executor
+     */
+    public Thread getThread() {
+        return mHandler.getLooper().getThread();
+    }
+
+    /**
+     * Returns the looper for this executor
+     */
+    public Looper getLooper() {
+        return mHandler.getLooper();
+    }
+
+    /**
+     * Set the priority of a thread, based on Linux priorities.
+     * @param priority Linux priority level, from -20 for highest scheduling priority
+     *                to 19 for lowest scheduling priority.
+     * @see Process#setThreadPriority(int, int)
+     */
+    public void setThreadPriority(int priority) {
+        Process.setThreadPriority(((HandlerThread) getThread()).getThreadId(), priority);
+    }
 }
diff --git a/src/com/android/launcher3/util/MainThreadInitializedObject.java b/src/com/android/launcher3/util/MainThreadInitializedObject.java
index e185a31..fe9c2c4 100644
--- a/src/com/android/launcher3/util/MainThreadInitializedObject.java
+++ b/src/com/android/launcher3/util/MainThreadInitializedObject.java
@@ -15,12 +15,13 @@
  */
 package com.android.launcher3.util;
 
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+
 import android.content.Context;
 import android.os.Looper;
 
 import androidx.annotation.VisibleForTesting;
 
-import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.util.ResourceBasedOverride.Overrides;
 
 import java.util.concurrent.ExecutionException;
@@ -43,7 +44,7 @@
                 mValue = mProvider.get(context.getApplicationContext());
             } else {
                 try {
-                    return new MainThreadExecutor().submit(() -> get(context)).get();
+                    return MAIN_EXECUTOR.submit(() -> get(context)).get();
                 } catch (InterruptedException|ExecutionException e) {
                     throw new RuntimeException(e);
                 }
diff --git a/src/com/android/launcher3/util/PackageManagerHelper.java b/src/com/android/launcher3/util/PackageManagerHelper.java
index 7d3a941..ef4307e 100644
--- a/src/com/android/launcher3/util/PackageManagerHelper.java
+++ b/src/com/android/launcher3/util/PackageManagerHelper.java
@@ -24,9 +24,11 @@
 import android.content.IntentFilter;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.LauncherActivityInfo;
+import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.pm.ResolveInfo;
+import android.content.res.Resources;
 import android.graphics.Rect;
 import android.net.Uri;
 import android.os.Build;
@@ -35,6 +37,7 @@
 import android.os.UserHandle;
 import android.text.TextUtils;
 import android.util.Log;
+import android.util.Pair;
 import android.widget.Toast;
 
 import com.android.launcher3.AppInfo;
@@ -220,4 +223,73 @@
         packageFilter.addDataSchemeSpecificPart(pkg, PatternMatcher.PATTERN_LITERAL);
         return packageFilter;
     }
+
+    public static boolean isSystemApp(Context context, Intent intent) {
+        PackageManager pm = context.getPackageManager();
+        ComponentName cn = intent.getComponent();
+        String packageName = null;
+        if (cn == null) {
+            ResolveInfo info = pm.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
+            if ((info != null) && (info.activityInfo != null)) {
+                packageName = info.activityInfo.packageName;
+            }
+        } else {
+            packageName = cn.getPackageName();
+        }
+        if (packageName != null) {
+            try {
+                PackageInfo info = pm.getPackageInfo(packageName, 0);
+                return (info != null) && (info.applicationInfo != null) &&
+                        ((info.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
+            } catch (NameNotFoundException e) {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Finds a system apk which had a broadcast receiver listening to a particular action.
+     * @param action intent action used to find the apk
+     * @return a pair of apk package name and the resources.
+     */
+    public static Pair<String, Resources> findSystemApk(String action, PackageManager pm) {
+        final Intent intent = new Intent(action);
+        for (ResolveInfo info : pm.queryBroadcastReceivers(intent, 0)) {
+            if (info.activityInfo != null &&
+                    (info.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
+                final String packageName = info.activityInfo.packageName;
+                try {
+                    final Resources res = pm.getResourcesForApplication(packageName);
+                    return Pair.create(packageName, res);
+                } catch (NameNotFoundException e) {
+                    Log.w(TAG, "Failed to find resources for " + packageName);
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Returns true if the intent is a valid launch intent for a launcher activity of an app.
+     * This is used to identify shortcuts which are different from the ones exposed by the
+     * applications' manifest file.
+     *
+     * @param launchIntent The intent that will be launched when the shortcut is clicked.
+     */
+    public static boolean isLauncherAppTarget(Intent launchIntent) {
+        if (launchIntent != null
+                && Intent.ACTION_MAIN.equals(launchIntent.getAction())
+                && launchIntent.getComponent() != null
+                && launchIntent.getCategories() != null
+                && launchIntent.getCategories().size() == 1
+                && launchIntent.hasCategory(Intent.CATEGORY_LAUNCHER)
+                && TextUtils.isEmpty(launchIntent.getDataString())) {
+            // An app target can either have no extra or have ItemInfo.EXTRA_PROFILE.
+            Bundle extras = launchIntent.getExtras();
+            return extras == null || extras.keySet().isEmpty();
+        }
+        return false;
+    }
 }
diff --git a/src/com/android/launcher3/util/PackageUserKey.java b/src/com/android/launcher3/util/PackageUserKey.java
index 8dc45f5..041c708 100644
--- a/src/com/android/launcher3/util/PackageUserKey.java
+++ b/src/com/android/launcher3/util/PackageUserKey.java
@@ -6,7 +6,6 @@
 import androidx.annotation.Nullable;
 
 import com.android.launcher3.ItemInfo;
-import com.android.launcher3.shortcuts.DeepShortcutManager;
 
 import java.util.Arrays;
 
diff --git a/src/com/android/launcher3/util/Preconditions.java b/src/com/android/launcher3/util/Preconditions.java
index 7ab0d31..ed66422 100644
--- a/src/com/android/launcher3/util/Preconditions.java
+++ b/src/com/android/launcher3/util/Preconditions.java
@@ -16,9 +16,10 @@
 
 package com.android.launcher3.util;
 
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+
 import android.os.Looper;
 
-import com.android.launcher3.LauncherModel;
 import com.android.launcher3.config.FeatureFlags;
 
 /**
@@ -33,7 +34,7 @@
     }
 
     public static void assertWorkerThread() {
-        if (FeatureFlags.IS_DOGFOOD_BUILD && !isSameLooper(LauncherModel.getWorkerLooper())) {
+        if (FeatureFlags.IS_DOGFOOD_BUILD && !isSameLooper(MODEL_EXECUTOR.getLooper())) {
             throw new IllegalStateException();
         }
     }
diff --git a/src/com/android/launcher3/util/SafeCloseable.java b/src/com/android/launcher3/util/SafeCloseable.java
new file mode 100644
index 0000000..ba8ee04
--- /dev/null
+++ b/src/com/android/launcher3/util/SafeCloseable.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.util;
+
+/**
+ * Extension of closeable which does not throw an exception
+ */
+public interface SafeCloseable extends AutoCloseable {
+
+    @Override
+    void close();
+}
diff --git a/src/com/android/launcher3/util/UiThreadHelper.java b/src/com/android/launcher3/util/UiThreadHelper.java
index cc442f9..f8d1632 100644
--- a/src/com/android/launcher3/util/UiThreadHelper.java
+++ b/src/com/android/launcher3/util/UiThreadHelper.java
@@ -15,14 +15,13 @@
  */
 package com.android.launcher3.util;
 
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
+
 import android.app.Activity;
 import android.content.Context;
 import android.os.Handler;
-import android.os.HandlerThread;
 import android.os.IBinder;
-import android.os.Looper;
 import android.os.Message;
-import android.os.Process;
 import android.view.inputmethod.InputMethodManager;
 
 /**
@@ -30,25 +29,15 @@
  */
 public class UiThreadHelper {
 
-    private static HandlerThread sHandlerThread;
     private static Handler sHandler;
 
     private static final int MSG_HIDE_KEYBOARD = 1;
     private static final int MSG_SET_ORIENTATION = 2;
     private static final int MSG_RUN_COMMAND = 3;
 
-    public static Looper getBackgroundLooper() {
-        if (sHandlerThread == null) {
-            sHandlerThread =
-                    new HandlerThread("UiThreadHelper", Process.THREAD_PRIORITY_FOREGROUND);
-            sHandlerThread.start();
-        }
-        return sHandlerThread.getLooper();
-    }
-
     private static Handler getHandler(Context context) {
         if (sHandler == null) {
-            sHandler = new Handler(getBackgroundLooper(),
+            sHandler = new Handler(UI_HELPER_EXECUTOR.getLooper(),
                     new UiCallbacks(context.getApplicationContext()));
         }
         return sHandler;
diff --git a/src/com/android/launcher3/util/ViewOnDrawExecutor.java b/src/com/android/launcher3/util/ViewOnDrawExecutor.java
index acce308..61ba4e5 100644
--- a/src/com/android/launcher3/util/ViewOnDrawExecutor.java
+++ b/src/com/android/launcher3/util/ViewOnDrawExecutor.java
@@ -16,13 +16,14 @@
 
 package com.android.launcher3.util;
 
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+
 import android.os.Process;
 import android.view.View;
 import android.view.View.OnAttachStateChangeListener;
 import android.view.ViewTreeObserver.OnDrawListener;
 
 import com.android.launcher3.Launcher;
-import com.android.launcher3.LauncherModel;
 
 import java.util.ArrayList;
 import java.util.concurrent.Executor;
@@ -66,7 +67,7 @@
     @Override
     public void execute(Runnable command) {
         mTasks.add(command);
-        LauncherModel.setWorkerPriority(Process.THREAD_PRIORITY_BACKGROUND);
+        MODEL_EXECUTOR.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
     }
 
     @Override
@@ -108,7 +109,7 @@
         if (mLauncher != null) {
             mLauncher.clearPendingExecutor(this);
         }
-        LauncherModel.setWorkerPriority(Process.THREAD_PRIORITY_DEFAULT);
+        MODEL_EXECUTOR.setThreadPriority(Process.THREAD_PRIORITY_DEFAULT);
     }
 
     protected boolean isCompleted() {
diff --git a/src/com/android/launcher3/util/WallpaperOffsetInterpolator.java b/src/com/android/launcher3/util/WallpaperOffsetInterpolator.java
index 5c24687..2ad80cf 100644
--- a/src/com/android/launcher3/util/WallpaperOffsetInterpolator.java
+++ b/src/com/android/launcher3/util/WallpaperOffsetInterpolator.java
@@ -1,5 +1,7 @@
 package com.android.launcher3.util;
 
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
+
 import android.app.WallpaperManager;
 import android.content.BroadcastReceiver;
 import android.content.Context;
@@ -198,7 +200,7 @@
         private float mOffsetX;
 
         public OffsetHandler(Context context) {
-            super(UiThreadHelper.getBackgroundLooper());
+            super(UI_HELPER_EXECUTOR.getLooper());
             mInterpolator = Interpolators.DEACCEL_1_5;
             mWM = WallpaperManager.getInstance(context);
         }
diff --git a/src/com/android/launcher3/views/FloatingIconView.java b/src/com/android/launcher3/views/FloatingIconView.java
index e09a9e8..b146452 100644
--- a/src/com/android/launcher3/views/FloatingIconView.java
+++ b/src/com/android/launcher3/views/FloatingIconView.java
@@ -18,11 +18,11 @@
 import static com.android.launcher3.LauncherAnimUtils.DRAWABLE_ALPHA;
 import static com.android.launcher3.Utilities.getBadge;
 import static com.android.launcher3.Utilities.getFullDrawable;
-import static com.android.launcher3.Utilities.isRtl;
 import static com.android.launcher3.Utilities.mapToRange;
 import static com.android.launcher3.anim.Interpolators.LINEAR;
 import static com.android.launcher3.config.FeatureFlags.ADAPTIVE_ICON_WINDOW_ANIM;
 import static com.android.launcher3.states.RotationHelper.REQUEST_LOCK;
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
@@ -42,7 +42,6 @@
 import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.CancellationSignal;
-import android.os.Handler;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.View;
@@ -51,11 +50,17 @@
 import android.view.ViewTreeObserver.OnGlobalLayoutListener;
 import android.widget.ImageView;
 
+import androidx.annotation.Nullable;
+import androidx.annotation.UiThread;
+import androidx.annotation.WorkerThread;
+import androidx.dynamicanimation.animation.FloatPropertyCompat;
+import androidx.dynamicanimation.animation.SpringAnimation;
+import androidx.dynamicanimation.animation.SpringForce;
+
 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.InsettableFrameLayout.LayoutParams;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.Launcher;
-import com.android.launcher3.LauncherModel;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.dragndrop.DragLayer;
@@ -67,13 +72,6 @@
 import com.android.launcher3.popup.SystemShortcut;
 import com.android.launcher3.shortcuts.DeepShortcutView;
 
-import androidx.annotation.Nullable;
-import androidx.annotation.UiThread;
-import androidx.annotation.WorkerThread;
-import androidx.dynamicanimation.animation.FloatPropertyCompat;
-import androidx.dynamicanimation.animation.SpringAnimation;
-import androidx.dynamicanimation.animation.SpringForce;
-
 /**
  * A view that is created to look like another view with the purpose of creating fluid animations.
  */
@@ -717,7 +715,7 @@
     @UiThread
     public static IconLoadResult fetchIcon(Launcher l, View v, ItemInfo info, boolean isOpening) {
         IconLoadResult result = new IconLoadResult();
-        new Handler(LauncherModel.getWorkerLooper()).postAtFrontOfQueue(() -> {
+        MODEL_EXECUTOR.getHandler().postAtFrontOfQueue(() -> {
             RectF position = new RectF();
             getLocationBoundsForView(l, v, isOpening, position);
             getIconResult(l, v, info, position, result);
diff --git a/src/com/android/launcher3/widget/LauncherAppWidgetHostView.java b/src/com/android/launcher3/widget/LauncherAppWidgetHostView.java
index dce839f..f3fd7ca 100644
--- a/src/com/android/launcher3/widget/LauncherAppWidgetHostView.java
+++ b/src/com/android/launcher3/widget/LauncherAppWidgetHostView.java
@@ -44,6 +44,7 @@
 import com.android.launcher3.StylusEventHelper;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.dragndrop.DragLayer;
+import com.android.launcher3.util.Executors;
 import com.android.launcher3.util.Themes;
 import com.android.launcher3.views.BaseDragLayer.TouchCompleteListener;
 
@@ -96,7 +97,7 @@
         setBackgroundResource(R.drawable.widget_internal_focus_bg);
 
         if (Utilities.ATLEAST_OREO) {
-            setExecutor(Utilities.THREAD_POOL_EXECUTOR);
+            setExecutor(Executors.THREAD_POOL_EXECUTOR);
         }
         if (Utilities.ATLEAST_Q && Themes.getAttrBoolean(mLauncher, R.attr.isWorkspaceDarkText)) {
             setOnLightBackground(true);
@@ -332,12 +333,7 @@
         if (shouldRegisterAutoAdvance != mIsAutoAdvanceRegistered) {
             mIsAutoAdvanceRegistered = shouldRegisterAutoAdvance;
             if (mAutoAdvanceRunnable == null) {
-                mAutoAdvanceRunnable = new Runnable() {
-                    @Override
-                    public void run() {
-                        runAutoAdvance();
-                    }
-                };
+                mAutoAdvanceRunnable = this::runAutoAdvance;
             }
 
             handler.removeCallbacks(mAutoAdvanceRunnable);
diff --git a/src_plugins/com/android/systemui/plugins/HotseatPlugin.java b/src_plugins/com/android/systemui/plugins/HotseatPlugin.java
new file mode 100644
index 0000000..1264e0d
--- /dev/null
+++ b/src_plugins/com/android/systemui/plugins/HotseatPlugin.java
@@ -0,0 +1,20 @@
+package com.android.systemui.plugins;
+
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.android.systemui.plugins.annotations.ProvidesInterface;
+
+/**
+ * Implement this plugin interface to add a sub-view in the Hotseat.
+ */
+@ProvidesInterface(action = HotseatPlugin.ACTION, version = HotseatPlugin.VERSION)
+public interface HotseatPlugin extends Plugin {
+    String ACTION = "com.android.systemui.action.PLUGIN_HOTSEAT";
+    int VERSION = 1;
+
+    /**
+     * Creates a plugin view which will be added to the Hotseat.
+     */
+    View createView(ViewGroup parent);
+}
diff --git a/src_shortcuts_overrides/com/android/launcher3/model/LoaderResults.java b/src_shortcuts_overrides/com/android/launcher3/model/LoaderResults.java
index 1710aef..789bfd8 100644
--- a/src_shortcuts_overrides/com/android/launcher3/model/LoaderResults.java
+++ b/src_shortcuts_overrides/com/android/launcher3/model/LoaderResults.java
@@ -16,9 +16,8 @@
 
 package com.android.launcher3.model;
 
-import com.android.launcher3.AllAppsList;
 import com.android.launcher3.LauncherAppState;
-import com.android.launcher3.LauncherModel.Callbacks;
+import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.widget.WidgetListRowEntry;
 
diff --git a/src_shortcuts_overrides/com/android/launcher3/shortcuts/DeepShortcutManager.java b/src_shortcuts_overrides/com/android/launcher3/shortcuts/DeepShortcutManager.java
index 09b1890..57f4164 100644
--- a/src_shortcuts_overrides/com/android/launcher3/shortcuts/DeepShortcutManager.java
+++ b/src_shortcuts_overrides/com/android/launcher3/shortcuts/DeepShortcutManager.java
@@ -43,35 +43,27 @@
             | ShortcutQuery.FLAG_MATCH_MANIFEST | ShortcutQuery.FLAG_MATCH_PINNED;
 
     private static DeepShortcutManager sInstance;
-    private static final Object sInstanceLock = new Object();
 
     public static DeepShortcutManager getInstance(Context context) {
-        synchronized (sInstanceLock) {
-            if (sInstance == null) {
-                sInstance = new DeepShortcutManager(context.getApplicationContext());
-            }
-            return sInstance;
+        if (sInstance == null) {
+            sInstance = new DeepShortcutManager(context.getApplicationContext());
         }
+        return sInstance;
     }
 
     private final LauncherApps mLauncherApps;
-    private boolean mWasLastCallSuccess;
 
     private DeepShortcutManager(Context context) {
         mLauncherApps = (LauncherApps) context.getSystemService(Context.LAUNCHER_APPS_SERVICE);
     }
 
-    public boolean wasLastCallSuccess() {
-        return mWasLastCallSuccess;
-    }
-
     /**
      * Queries for the shortcuts with the package name and provided ids.
      *
      * This method is intended to get the full details for shortcuts when they are added or updated,
      * because we only get "key" fields in onShortcutsChanged().
      */
-    public List<ShortcutInfo> queryForFullDetails(String packageName,
+    public QueryResult queryForFullDetails(String packageName,
             List<String> shortcutIds, UserHandle user) {
         return query(FLAG_GET_ALL, packageName, null, shortcutIds, user);
     }
@@ -80,9 +72,9 @@
      * Gets all the manifest and dynamic shortcuts associated with the given package and user,
      * to be displayed in the shortcuts container on long press.
      */
-    public List<ShortcutInfo> queryForShortcutsContainer(@Nullable ComponentName activity,
+    public QueryResult queryForShortcutsContainer(@Nullable ComponentName activity,
             UserHandle user) {
-        if (activity == null) return Collections.EMPTY_LIST;
+        if (activity == null) return QueryResult.FAILURE;
         return query(ShortcutQuery.FLAG_MATCH_MANIFEST | ShortcutQuery.FLAG_MATCH_DYNAMIC,
                 activity.getPackageName(), activity, null, user);
     }
@@ -99,10 +91,8 @@
         pinnedIds.remove(id);
         try {
             mLauncherApps.pinShortcuts(packageName, pinnedIds, user);
-            mWasLastCallSuccess = true;
         } catch (SecurityException|IllegalStateException e) {
             Log.w(TAG, "Failed to unpin shortcut", e);
-            mWasLastCallSuccess = false;
         }
     }
 
@@ -118,10 +108,8 @@
         pinnedIds.add(id);
         try {
             mLauncherApps.pinShortcuts(packageName, pinnedIds, user);
-            mWasLastCallSuccess = true;
         } catch (SecurityException|IllegalStateException e) {
             Log.w(TAG, "Failed to pin shortcut", e);
-            mWasLastCallSuccess = false;
         }
     }
 
@@ -130,23 +118,18 @@
         try {
             mLauncherApps.startShortcut(packageName, id, sourceBounds,
                     startActivityOptions, user);
-            mWasLastCallSuccess = true;
         } catch (SecurityException|IllegalStateException e) {
             Log.e(TAG, "Failed to start shortcut", e);
-            mWasLastCallSuccess = false;
         }
     }
 
     public Drawable getShortcutIconDrawable(ShortcutInfo shortcutInfo, int density) {
         try {
-            Drawable icon = mLauncherApps.getShortcutIconDrawable(shortcutInfo, density);
-            mWasLastCallSuccess = true;
-            return icon;
+            return mLauncherApps.getShortcutIconDrawable(shortcutInfo, density);
         } catch (SecurityException|IllegalStateException e) {
             Log.e(TAG, "Failed to get shortcut icon", e);
-            mWasLastCallSuccess = false;
+            return null;
         }
-        return null;
     }
 
     /**
@@ -154,20 +137,20 @@
      *
      * If packageName is null, returns all pinned shortcuts regardless of package.
      */
-    public List<ShortcutInfo> queryForPinnedShortcuts(String packageName, UserHandle user) {
+    public QueryResult queryForPinnedShortcuts(String packageName, UserHandle user) {
         return queryForPinnedShortcuts(packageName, null, user);
     }
 
-    public List<ShortcutInfo> queryForPinnedShortcuts(String packageName,
-            List<String> shortcutIds, UserHandle user) {
+    public QueryResult queryForPinnedShortcuts(String packageName, List<String> shortcutIds,
+            UserHandle user) {
         return query(ShortcutQuery.FLAG_MATCH_PINNED, packageName, null, shortcutIds, user);
     }
 
-    public List<ShortcutInfo> queryForAllShortcuts(UserHandle user) {
+    public QueryResult queryForAllShortcuts(UserHandle user) {
         return query(FLAG_GET_ALL, null, null, null, user);
     }
 
-    private List<String> extractIds(List<ShortcutInfo> shortcuts) {
+    private static List<String> extractIds(List<ShortcutInfo> shortcuts) {
         List<String> shortcutIds = new ArrayList<>(shortcuts.size());
         for (ShortcutInfo shortcut : shortcuts) {
             shortcutIds.add(shortcut.getId());
@@ -181,8 +164,8 @@
      *
      * TODO: Use the cache to optimize this so we don't make an RPC every time.
      */
-    private List<ShortcutInfo> query(int flags, String packageName,
-            ComponentName activity, List<String> shortcutIds, UserHandle user) {
+    private QueryResult query(int flags, String packageName, ComponentName activity,
+            List<String> shortcutIds, UserHandle user) {
         ShortcutQuery q = new ShortcutQuery();
         q.setQueryFlags(flags);
         if (packageName != null) {
@@ -190,18 +173,12 @@
             q.setActivity(activity);
             q.setShortcutIds(shortcutIds);
         }
-        List<ShortcutInfo> shortcutInfos = null;
         try {
-            shortcutInfos = mLauncherApps.getShortcuts(q, user);
-            mWasLastCallSuccess = true;
+            return new QueryResult(mLauncherApps.getShortcuts(q, user));
         } catch (SecurityException|IllegalStateException e) {
             Log.e(TAG, "Failed to query for shortcuts", e);
-            mWasLastCallSuccess = false;
+            return QueryResult.FAILURE;
         }
-        if (shortcutInfos == null) {
-            return Collections.EMPTY_LIST;
-        }
-        return shortcutInfos;
     }
 
     public boolean hasHostPermission() {
@@ -212,4 +189,25 @@
         }
         return false;
     }
+
+    public static class QueryResult extends ArrayList<ShortcutInfo> {
+
+        static QueryResult FAILURE = new QueryResult();
+
+        private final boolean mWasSuccess;
+
+        QueryResult(List<ShortcutInfo> result) {
+            super(result == null ? Collections.emptyList() : result);
+            mWasSuccess = true;
+        }
+
+        QueryResult() {
+            mWasSuccess = false;
+        }
+
+
+        public boolean wasSuccess() {
+            return mWasSuccess;
+        }
+    }
 }
diff --git a/tests/Android.mk b/tests/Android.mk
index 0c41241..02ead4e 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -27,7 +27,7 @@
 
 ifneq (,$(wildcard frameworks/base))
 else
-    LOCAL_STATIC_JAVA_LIBRARIES += libSharedSystemUI
+    LOCAL_STATIC_JAVA_LIBRARIES += SystemUISharedLib
 
     LOCAL_SRC_FILES := $(call all-java-files-under, tapl) \
         ../src/com/android/launcher3/ResourceUtils.java \
diff --git a/tests/src/com/android/launcher3/model/LoaderCursorTest.java b/tests/src/com/android/launcher3/model/LoaderCursorTest.java
index 7d60ad6..64df8e0 100644
--- a/tests/src/com/android/launcher3/model/LoaderCursorTest.java
+++ b/tests/src/com/android/launcher3/model/LoaderCursorTest.java
@@ -15,9 +15,9 @@
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.LauncherAppState;
-import com.android.launcher3.Utilities;
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.icons.BitmapInfo;
+import com.android.launcher3.util.PackageManagerHelper;
 
 import org.junit.Before;
 import org.junit.Test;
@@ -115,7 +115,7 @@
         WorkspaceItemInfo info = mLoaderCursor.getAppShortcutInfo(
                 new Intent().setComponent(cn), false /* allowMissingTarget */, true);
         assertNotNull(info);
-        assertTrue(Utilities.isLauncherAppTarget(info.intent));
+        assertTrue(PackageManagerHelper.isLauncherAppTarget(info.intent));
     }
 
     @Test
@@ -127,7 +127,7 @@
         WorkspaceItemInfo info = mLoaderCursor.getAppShortcutInfo(
                 new Intent().setComponent(cn), true  /* allowMissingTarget */, true);
         assertNotNull(info);
-        assertTrue(Utilities.isLauncherAppTarget(info.intent));
+        assertTrue(PackageManagerHelper.isLauncherAppTarget(info.intent));
     }
 
     @Test
diff --git a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
index fc19baa..6d636cf 100644
--- a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
+++ b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
@@ -19,12 +19,12 @@
 
 import static com.android.launcher3.tapl.LauncherInstrumentation.ContainerType;
 import static com.android.launcher3.ui.TaplTestsLauncher3.getAppPackageName;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 
 import static org.junit.Assert.assertTrue;
 
 import static java.lang.System.exit;
 
-import android.app.Instrumentation;
 import android.content.BroadcastReceiver;
 import android.content.ComponentName;
 import android.content.Context;
@@ -48,7 +48,6 @@
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.LauncherStateManager;
-import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.model.AppLaunchTracker;
@@ -56,6 +55,7 @@
 import com.android.launcher3.tapl.TestHelpers;
 import com.android.launcher3.testcomponent.TestCommandReceiver;
 import com.android.launcher3.testing.TestProtocol;
+import com.android.launcher3.util.LooperExecutor;
 import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.Wait;
 import com.android.launcher3.util.rule.FailureWatcher;
@@ -90,7 +90,7 @@
     public static final long DEFAULT_UI_TIMEOUT = 60000; // b/136278866
     private static final String TAG = "AbstractLauncherUiTest";
 
-    protected MainThreadExecutor mMainThreadExecutor = new MainThreadExecutor();
+    protected LooperExecutor mMainThreadExecutor = MAIN_EXECUTOR;
     protected final UiDevice mDevice = UiDevice.getInstance(getInstrumentation());
     protected final LauncherInstrumentation mLauncher =
             new LauncherInstrumentation(getInstrumentation());
diff --git a/tests/src/com/android/launcher3/util/Condition.java b/tests/src/com/android/launcher3/util/Condition.java
index b564a1a..d85dd3a 100644
--- a/tests/src/com/android/launcher3/util/Condition.java
+++ b/tests/src/com/android/launcher3/util/Condition.java
@@ -1,8 +1,8 @@
 package com.android.launcher3.util;
 
-import androidx.test.uiautomator.UiObject2;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 
-import com.android.launcher3.MainThreadExecutor;
+import androidx.test.uiautomator.UiObject2;
 
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
@@ -16,7 +16,7 @@
      * Converts the condition to be run on UI thread.
      */
     static Condition runOnUiThread(final Condition condition) {
-        final MainThreadExecutor executor = new MainThreadExecutor();
+        final LooperExecutor executor = MAIN_EXECUTOR;
         return () -> {
             final AtomicBoolean value = new AtomicBoolean(false);
             final Throwable[] exceptions = new Throwable[1];
diff --git a/tests/src/com/android/launcher3/util/RaceConditionReproducer.java b/tests/src/com/android/launcher3/util/RaceConditionReproducer.java
index 0235f95..8f89173 100644
--- a/tests/src/com/android/launcher3/util/RaceConditionReproducer.java
+++ b/tests/src/com/android/launcher3/util/RaceConditionReproducer.java
@@ -16,6 +16,7 @@
 
 package com.android.launcher3.util;
 
+import static com.android.launcher3.util.Executors.createAndStartNewLooper;
 import static com.android.launcher3.util.RaceConditionTracker.ENTER_POSTFIX;
 import static com.android.launcher3.util.RaceConditionTracker.EXIT_POSTFIX;
 
@@ -23,7 +24,6 @@
 import static org.junit.Assert.fail;
 
 import android.os.Handler;
-import android.os.HandlerThread;
 import android.util.Log;
 
 import java.util.ArrayList;
@@ -72,9 +72,7 @@
     private static final Handler POSTPONED_EVENT_RESUME_HANDLER = createEventResumeHandler();
 
     private static Handler createEventResumeHandler() {
-        final HandlerThread thread = new HandlerThread("RaceConditionEventResumer");
-        thread.start();
-        return new Handler(thread.getLooper());
+        return new Handler(createAndStartNewLooper("RaceConditionEventResumer"));
     }
 
     /**