diff --git a/quickstep/AndroidManifest.xml b/quickstep/AndroidManifest.xml
index b43d8d1..dc92731 100644
--- a/quickstep/AndroidManifest.xml
+++ b/quickstep/AndroidManifest.xml
@@ -22,11 +22,6 @@
      xmlns:tools="http://schemas.android.com/tools"
      package="com.android.launcher3">
 
-     <permission
-        android:name="${packageName}.permission.HOTSEAT_EDU"
-        android:permissionGroup="android.permission-group.SYSTEM_TOOLS"
-        android:protectionLevel="signatureOrSystem" />
-
     <uses-permission android:name="android.permission.BROADCAST_CLOSE_SYSTEM_DIALOGS" />
     <uses-permission android:name="android.permission.CONTROL_REMOTE_APP_TRANSITION_ANIMATIONS"/>
     <uses-permission android:name="android.permission.VIBRATE"/>
@@ -41,7 +36,6 @@
     <uses-permission android:name="android.permission.MANAGE_ACCESSIBILITY"/>
     <uses-permission android:name="android.permission.MONITOR_INPUT"/>
 
-    <uses-permission android:name="${packageName}.permission.HOTSEAT_EDU" />
     <uses-permission android:name="android.permission.SYSTEM_APPLICATION_OVERLAY" />
 
     <application android:backupAgent="com.android.launcher3.LauncherBackupAgent"
@@ -133,20 +127,6 @@
             </intent-filter>
         </activity>
 
-        <activity
-            android:name=".hybridhotseat.HotseatEduActivity"
-            android:theme="@android:style/Theme.NoDisplay"
-            android:noHistory="true"
-            android:launchMode="singleTask"
-            android:clearTaskOnLaunch="true"
-            android:permission="${packageName}.permission.HOTSEAT_EDU"
-            android:exported="true">
-            <intent-filter>
-                <action android:name="com.android.launcher3.action.SHOW_HYBRID_HOTSEAT_EDU"/>
-                <category android:name="android.intent.category.DEFAULT" />
-            </intent-filter>
-        </activity>
-
     </application>
 
 </manifest>
diff --git a/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java b/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
index ca42567..2534699 100644
--- a/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
+++ b/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
@@ -335,7 +335,7 @@
         mActionsView = findViewById(R.id.overview_actions_view);
         RecentsView overviewPanel = (RecentsView) getOverviewPanel();
         SplitSelectStateController controller =
-                new SplitSelectStateController(mHandler, SystemUiProxy.INSTANCE.get(this));
+                new SplitSelectStateController(SystemUiProxy.INSTANCE.get(this));
         overviewPanel.init(mActionsView, controller);
         mActionsView.setDp(getDeviceProfile());
         mActionsView.updateVerticalMargin(SysUINavigationMode.getMode(this));
diff --git a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
index 494b953..89cc1f6 100644
--- a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
+++ b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
@@ -676,7 +676,7 @@
                 ? Math.max(crop.width(), crop.height()) / 2f
                 : 0f;
         final float finalWindowRadius = mDeviceProfile.isMultiWindowMode
-                ? 0 : getWindowCornerRadius(mLauncher.getResources());
+                ? 0 : getWindowCornerRadius(mLauncher);
         final float finalShadowRadius = appTargetsAreTranslucent ? 0 : mMaxShadowRadius;
 
         MultiValueUpdateListener listener = new MultiValueUpdateListener() {
@@ -867,7 +867,7 @@
         }
 
         final float finalWindowRadius = mDeviceProfile.isMultiWindowMode
-                ? 0 : getWindowCornerRadius(mLauncher.getResources());
+                ? 0 : getWindowCornerRadius(mLauncher);
         final FloatingWidgetView floatingView = FloatingWidgetView.getFloatingWidgetView(mLauncher,
                 v, widgetBackgroundBounds,
                 new Size(windowTargetBounds.width(), windowTargetBounds.height()),
@@ -1149,7 +1149,7 @@
         ValueAnimator unlockAnimator = ValueAnimator.ofFloat(0, 1);
         unlockAnimator.setDuration(CLOSING_TRANSITION_DURATION_MS);
         float cornerRadius = mDeviceProfile.isMultiWindowMode ? 0 :
-                QuickStepContract.getWindowCornerRadius(mLauncher.getResources());
+                QuickStepContract.getWindowCornerRadius(mLauncher);
         unlockAnimator.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationStart(Animator animation) {
@@ -1191,7 +1191,7 @@
         ValueAnimator closingAnimator = ValueAnimator.ofFloat(0, 1);
         int duration = CLOSING_TRANSITION_DURATION_MS;
         float windowCornerRadius = mDeviceProfile.isMultiWindowMode
-                ? 0 : getWindowCornerRadius(mLauncher.getResources());
+                ? 0 : getWindowCornerRadius(mLauncher);
         float startShadowRadius = areAllTargetsTranslucent(appTargets) ? 0 : mMaxShadowRadius;
         closingAnimator.setDuration(duration);
         closingAnimator.addUpdateListener(new MultiValueUpdateListener() {
diff --git a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduActivity.java b/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduActivity.java
deleted file mode 100644
index 3a7d821..0000000
--- a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduActivity.java
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2020 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.hybridhotseat;
-
-import android.app.Activity;
-import android.content.Intent;
-import android.os.Bundle;
-
-import com.android.launcher3.BaseActivity;
-import com.android.launcher3.Launcher;
-import com.android.launcher3.uioverrides.QuickstepLauncher;
-import com.android.launcher3.util.ActivityTracker;
-
-/**
- * Proxy activity to return user to home screen and show halfsheet education
- */
-public class HotseatEduActivity extends Activity {
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
-        Intent homeIntent = new Intent(Intent.ACTION_MAIN)
-                .addCategory(Intent.CATEGORY_HOME)
-                .setPackage(getPackageName())
-                .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-
-        Launcher.ACTIVITY_TRACKER.registerCallback(new HotseatActivityTracker());
-        startActivity(homeIntent);
-        finish();
-    }
-
-    static class HotseatActivityTracker<T extends QuickstepLauncher> implements
-            ActivityTracker.SchedulerCallback {
-
-        @Override
-        public boolean init(BaseActivity activity, boolean alreadyOnHome) {
-            QuickstepLauncher launcher = (QuickstepLauncher) activity;
-            if (launcher != null) {
-                launcher.getHotseatPredictionController().showEdu();
-            }
-            return false;
-        }
-
-    }
-}
diff --git a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
index 4c46683..be0c980 100644
--- a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
+++ b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
@@ -531,7 +531,7 @@
         ActivityManager.RunningTaskInfo[] runningTasks;
         if (mIsSwipeForStagedSplit) {
             int[] splitTaskIds =
-                    LauncherSplitScreenListener.INSTANCE.getNoCreate().getSplitTaskIds();
+                    LauncherSplitScreenListener.INSTANCE.getNoCreate().getRunningSplitTaskIds();
             runningTasks = new ActivityManager.RunningTaskInfo[splitTaskIds.length];
             for (int i = 0; i < splitTaskIds.length; i++) {
                 int taskId = splitTaskIds[i];
diff --git a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
index 780032e..0efe666 100644
--- a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
+++ b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
@@ -33,11 +33,8 @@
 import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
-import android.os.SystemClock;
-import android.util.Log;
 import android.util.SparseIntArray;
 
-import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.tracing.OverviewComponentObserverProto;
 import com.android.launcher3.tracing.TouchInteractionServiceProto;
 import com.android.launcher3.util.SimpleBroadcastReceiver;
@@ -132,16 +129,6 @@
     private void updateOverviewTargets() {
         ComponentName defaultHome = PackageManagerWrapper.getInstance()
                 .getHomeActivities(new ArrayList<>());
-        if (TestProtocol.sDebugTracing && defaultHome == null) {
-            Log.d(TestProtocol.THIRD_PARTY_LAUNCHER_NOT_SET, "getHomeActivities returned null");
-            while ((defaultHome =
-                    PackageManagerWrapper.getInstance().getHomeActivities(new ArrayList<>()))
-                    == null) {
-                SystemClock.sleep(10);
-            }
-            Log.d(TestProtocol.THIRD_PARTY_LAUNCHER_NOT_SET,
-                    "getHomeActivities returned non-null: " + defaultHome);
-        }
 
         mIsHomeDisabled = mDeviceState.isHomeDisabled();
         mIsDefaultHome = Objects.equals(mMyHomeIntent.getComponent(), defaultHome);
diff --git a/quickstep/src/com/android/quickstep/RecentsActivity.java b/quickstep/src/com/android/quickstep/RecentsActivity.java
index 03e2395..cc6cfd7 100644
--- a/quickstep/src/com/android/quickstep/RecentsActivity.java
+++ b/quickstep/src/com/android/quickstep/RecentsActivity.java
@@ -122,7 +122,7 @@
         SYSUI_PROGRESS.set(getRootView().getSysUiScrim(), 0f);
 
         SplitSelectStateController controller =
-                new SplitSelectStateController(mHandler, SystemUiProxy.INSTANCE.get(this));
+                new SplitSelectStateController(SystemUiProxy.INSTANCE.get(this));
         mDragLayer.recreateControllers();
         mFallbackRecentsView.init(mActionsView, controller);
     }
diff --git a/quickstep/src/com/android/quickstep/RotationTouchHelper.java b/quickstep/src/com/android/quickstep/RotationTouchHelper.java
index 2a422cc..35efddf 100644
--- a/quickstep/src/com/android/quickstep/RotationTouchHelper.java
+++ b/quickstep/src/com/android/quickstep/RotationTouchHelper.java
@@ -148,7 +148,7 @@
         mDisplayId = DEFAULT_DISPLAY;
 
         mOrientationTouchTransformer = new OrientationTouchTransformer(resources, mMode,
-                () -> QuickStepContract.getWindowCornerRadius(resources));
+                () -> QuickStepContract.getWindowCornerRadius(mContext));
 
         // Register for navigation mode changes
         SysUINavigationMode.Mode newMode = mSysUiNavMode.addModeChangeListener(this);
diff --git a/quickstep/src/com/android/quickstep/SwipeUpAnimationLogic.java b/quickstep/src/com/android/quickstep/SwipeUpAnimationLogic.java
index 1f57e99..e14dbb1 100644
--- a/quickstep/src/com/android/quickstep/SwipeUpAnimationLogic.java
+++ b/quickstep/src/com/android/quickstep/SwipeUpAnimationLogic.java
@@ -90,7 +90,8 @@
         mGestureState = gestureState;
 
         mIsSwipeForStagedSplit = ENABLE_SPLIT_SELECT.get() &&
-                LauncherSplitScreenListener.INSTANCE.getNoCreate().getSplitTaskIds().length > 1;
+                LauncherSplitScreenListener.INSTANCE.getNoCreate()
+                        .getRunningSplitTaskIds().length > 1;
 
         TaskViewSimulator primaryTVS = new TaskViewSimulator(context,
                 gestureState.getActivityInterface());
diff --git a/quickstep/src/com/android/quickstep/TaskOverlayFactory.java b/quickstep/src/com/android/quickstep/TaskOverlayFactory.java
index eb5c43f..978fb57 100644
--- a/quickstep/src/com/android/quickstep/TaskOverlayFactory.java
+++ b/quickstep/src/com/android/quickstep/TaskOverlayFactory.java
@@ -107,6 +107,13 @@
 
     public static void addSplitOptions(List<SystemShortcut> outShortcuts,
             BaseDraggingActivity activity, TaskView taskView, DeviceProfile deviceProfile) {
+        int[] taskViewTaskIds = taskView.getTaskIds();
+        boolean alreadyHasMultipleTasks = taskViewTaskIds[0] != -1 &&
+                taskViewTaskIds[1] != -1;
+        if (alreadyHasMultipleTasks) {
+            return;
+        }
+
         PagedOrientationHandler orientationHandler =
                 taskView.getRecentsView().getPagedOrientationHandler();
         List<SplitPositionOption> positions =
diff --git a/quickstep/src/com/android/quickstep/interaction/NavBarGestureHandler.java b/quickstep/src/com/android/quickstep/interaction/NavBarGestureHandler.java
index a9a9e2a..fc1dd6f 100644
--- a/quickstep/src/com/android/quickstep/interaction/NavBarGestureHandler.java
+++ b/quickstep/src/com/android/quickstep/interaction/NavBarGestureHandler.java
@@ -120,7 +120,7 @@
         mAssistantGestureDetector = new GestureDetector(context, new AssistantGestureListener());
         int assistantWidth = resources.getDimensionPixelSize(R.dimen.gestures_assistant_width);
         final float assistantHeight = Math.max(mBottomGestureHeight,
-                QuickStepContract.getWindowCornerRadius(resources));
+                QuickStepContract.getWindowCornerRadius(context));
         mAssistantLeftRegion.bottom = mAssistantRightRegion.bottom = mDisplaySize.y;
         mAssistantLeftRegion.top = mAssistantRightRegion.top = mDisplaySize.y - assistantHeight;
         mAssistantLeftRegion.left = 0;
diff --git a/quickstep/src/com/android/quickstep/util/LauncherSplitScreenListener.java b/quickstep/src/com/android/quickstep/util/LauncherSplitScreenListener.java
index da665d4..0f4ed01 100644
--- a/quickstep/src/com/android/quickstep/util/LauncherSplitScreenListener.java
+++ b/quickstep/src/com/android/quickstep/util/LauncherSplitScreenListener.java
@@ -11,20 +11,54 @@
 import com.android.launcher3.util.SplitConfigurationOptions.StageType;
 import com.android.launcher3.util.SplitConfigurationOptions.StagedSplitTaskPosition;
 import com.android.quickstep.SystemUiProxy;
+import com.android.systemui.shared.system.TaskStackChangeListener;
+import com.android.systemui.shared.system.TaskStackChangeListeners;
 import com.android.wm.shell.splitscreen.ISplitScreenListener;
 
 /**
  * Listeners for system wide split screen position and stage changes.
- * Use {@link #getSplitTaskIds()} to determine which tasks, if any, are in staged split.
+ *
+ * Use {@link #getRunningSplitTaskIds()} to determine which tasks, if any, are actively in
+ * staged split.
+ *
+ * Use {@link #getPersistentSplitIds()} to know if tasks were in split screen before a quickswitch
+ * gesture happened.
  */
 public class LauncherSplitScreenListener extends ISplitScreenListener.Stub {
 
     public static final MainThreadInitializedObject<LauncherSplitScreenListener> INSTANCE =
             new MainThreadInitializedObject<>(LauncherSplitScreenListener::new);
 
+    private static final int[] EMPTY_ARRAY = {};
+
     private final StagedSplitTaskPosition mMainStagePosition = new StagedSplitTaskPosition();
     private final StagedSplitTaskPosition mSideStagePosition = new StagedSplitTaskPosition();
 
+    private boolean mIsRecentsListFrozen = false;
+    private final TaskStackChangeListener mTaskStackListener = new TaskStackChangeListener() {
+        @Override
+        public void onRecentTaskListFrozenChanged(boolean frozen) {
+            super.onRecentTaskListFrozenChanged(frozen);
+            mIsRecentsListFrozen = frozen;
+
+            if (frozen) {
+                mPersistentGroupedIds = getRunningSplitTaskIds();
+            } else {
+                // TODO(b/198310766) Need to also explicitly exit split screen if
+                //  we're not currently viewing split screened apps
+                mPersistentGroupedIds = EMPTY_ARRAY;
+            }
+        }
+    };
+
+    /**
+     * Gets set to current split taskIDs whenever the task list is frozen, and set to empty array
+     * whenever task list unfreezes.
+     * When not null, this indicates that we need to load a GroupedTaskView as the most recent
+     * page, so user can quickswitch back to a grouped task.
+     */
+    private int[] mPersistentGroupedIds;
+
     public LauncherSplitScreenListener(Context context) {
         mMainStagePosition.stageType = SplitConfigurationOptions.STAGE_TYPE_MAIN;
         mSideStagePosition.stageType = SplitConfigurationOptions.STAGE_TYPE_SIDE;
@@ -33,17 +67,30 @@
     /** Also call {@link #destroy()} when done. */
     public void init() {
         SystemUiProxy.INSTANCE.getNoCreate().registerSplitScreenListener(this);
+        TaskStackChangeListeners.getInstance().registerTaskStackListener(mTaskStackListener);
     }
 
     public void destroy() {
         SystemUiProxy.INSTANCE.getNoCreate().unregisterSplitScreenListener(this);
+        TaskStackChangeListeners.getInstance().unregisterTaskStackListener(mTaskStackListener);
     }
 
     /**
+     * This method returns the active split taskIDs that were active if a user quickswitched from
+     * split screen to a fullscreen app as long as the recents task list remains frozen.
+     */
+    public int[] getPersistentSplitIds() {
+        if (mIsRecentsListFrozen) {
+            return mPersistentGroupedIds;
+        } else {
+            return getRunningSplitTaskIds();
+        }
+    }
+    /**
      * @return index 0 will be task in left/top position, index 1 in right/bottom position.
      *         Will return empty array if device is not in staged split
      */
-    public int[] getSplitTaskIds() {
+    public int[] getRunningSplitTaskIds() {
         if (mMainStagePosition.taskId == -1 || mSideStagePosition.taskId == -1) {
             return new int[]{};
         }
diff --git a/quickstep/src/com/android/quickstep/util/SplitSelectStateController.java b/quickstep/src/com/android/quickstep/util/SplitSelectStateController.java
index ac5f5d8..3069504 100644
--- a/quickstep/src/com/android/quickstep/util/SplitSelectStateController.java
+++ b/quickstep/src/com/android/quickstep/util/SplitSelectStateController.java
@@ -22,7 +22,6 @@
 
 import android.app.ActivityThread;
 import android.graphics.Rect;
-import android.os.Handler;
 import android.os.IBinder;
 import android.view.RemoteAnimationAdapter;
 import android.view.SurfaceControl;
@@ -40,6 +39,8 @@
 import com.android.systemui.shared.system.RemoteTransitionCompat;
 import com.android.systemui.shared.system.RemoteTransitionRunner;
 
+import java.util.function.Consumer;
+
 /**
  * Represent data needed for the transient state when user has selected one app for split screen
  * and is in the process of either a) selecting a second app or b) exiting intention to invoke split
@@ -52,7 +53,7 @@
     private Task mSecondTask;
     private Rect mInitialBounds;
 
-    public SplitSelectStateController(Handler handler, SystemUiProxy systemUiProxy) {
+    public SplitSelectStateController(SystemUiProxy systemUiProxy) {
         mSystemUiProxy = systemUiProxy;
     }
 
@@ -71,13 +72,14 @@
      */
     public void setSecondTaskId(Task taskView) {
         mSecondTask = taskView;
-        launchTasks(mInitialTask, mSecondTask, mStagePosition);
+        launchTasks(mInitialTask, mSecondTask, mStagePosition, null /*callback*/);
     }
 
     /**
      * @param stagePosition representing location of task1
      */
-    public void launchTasks(Task task1, Task task2, @StagePosition int stagePosition) {
+    public void launchTasks(Task task1, Task task2, @StagePosition int stagePosition,
+            Consumer<Boolean> callback) {
         // Assume initial task is for top/left part of screen
         final int[] taskIds = stagePosition == STAGE_POSITION_TOP_OR_LEFT
                 ? new int[]{task1.key.id, task2.key.id}
@@ -90,7 +92,7 @@
                     new RemoteTransitionCompat(animationRunner, MAIN_EXECUTOR));
         } else {
             RemoteSplitLaunchAnimationRunner animationRunner =
-                    new RemoteSplitLaunchAnimationRunner(task1, task2);
+                    new RemoteSplitLaunchAnimationRunner(task1, task2, callback);
             final RemoteAnimationAdapter adapter = new RemoteAnimationAdapter(
                     RemoteAnimationAdapterCompat.wrapRemoteAnimationRunner(animationRunner),
                     300, 150,
@@ -136,10 +138,13 @@
 
         private final Task mInitialTask;
         private final Task mSecondTask;
+        private final Consumer<Boolean> mSuccessCallback;
 
-        RemoteSplitLaunchAnimationRunner(Task initialTask, Task secondTask) {
+        RemoteSplitLaunchAnimationRunner(Task initialTask, Task secondTask,
+                Consumer<Boolean> successCallback) {
             mInitialTask = initialTask;
             mSecondTask = secondTask;
+            mSuccessCallback = successCallback;
         }
 
         @Override
@@ -147,13 +152,21 @@
                 RemoteAnimationTargetCompat[] wallpapers, RemoteAnimationTargetCompat[] nonApps,
                 Runnable finishedCallback) {
             TaskViewUtils.composeRecentsSplitLaunchAnimatorLegacy(mInitialTask,
-                    mSecondTask, apps, wallpapers, nonApps, finishedCallback);
+                    mSecondTask, apps, wallpapers, nonApps, () -> {
+                        finishedCallback.run();
+                        if (mSuccessCallback != null) {
+                            mSuccessCallback.accept(true);
+                        }
+                    });
             // After successful launch, call resetState
             resetState();
         }
 
         @Override
         public void onAnimationCancelled() {
+            if (mSuccessCallback != null) {
+                mSuccessCallback.accept(false);
+            }
             resetState();
         }
     }
diff --git a/quickstep/src/com/android/quickstep/views/GroupedTaskView.java b/quickstep/src/com/android/quickstep/views/GroupedTaskView.java
index e1e1c65..d3077ad 100644
--- a/quickstep/src/com/android/quickstep/views/GroupedTaskView.java
+++ b/quickstep/src/com/android/quickstep/views/GroupedTaskView.java
@@ -3,6 +3,8 @@
 import android.content.Context;
 import android.util.AttributeSet;
 
+import androidx.annotation.NonNull;
+
 import com.android.launcher3.R;
 import com.android.launcher3.util.RunnableList;
 import com.android.launcher3.util.SplitConfigurationOptions;
@@ -12,6 +14,8 @@
 import com.android.quickstep.util.RecentsOrientedState;
 import com.android.systemui.shared.recents.model.Task;
 
+import java.util.function.Consumer;
+
 /**
  * TaskView that contains and shows thumbnails for not one, BUT TWO(!!) tasks
  *
@@ -98,11 +102,17 @@
     @Override
     public RunnableList launchTaskAnimated() {
         getRecentsView().getSplitPlaceholder().launchTasks(mTask, mSecondaryTask,
-                SplitConfigurationOptions.STAGE_POSITION_TOP_OR_LEFT);
+                SplitConfigurationOptions.STAGE_POSITION_TOP_OR_LEFT, null /*callback*/);
         return null;
     }
 
     @Override
+    public void launchTask(@NonNull Consumer<Boolean> callback, boolean freezeTaskList) {
+        getRecentsView().getSplitPlaceholder().launchTasks(mTask, mSecondaryTask,
+                SplitConfigurationOptions.STAGE_POSITION_TOP_OR_LEFT, callback);
+    }
+
+    @Override
     public void onRecycle() {
         super.onRecycle();
         mSnapshotView2.setThumbnail(mSecondaryTask, null);
diff --git a/quickstep/src/com/android/quickstep/views/OverviewActionsView.java b/quickstep/src/com/android/quickstep/views/OverviewActionsView.java
index 5d1c202..1b28c53 100644
--- a/quickstep/src/com/android/quickstep/views/OverviewActionsView.java
+++ b/quickstep/src/com/android/quickstep/views/OverviewActionsView.java
@@ -223,7 +223,6 @@
         mDp = dp;
         updateVerticalMargin(SysUINavigationMode.getMode(getContext()));
         requestLayout();
-        setSplitButtonVisible(mDp.isTablet);
     }
 
     public void setSplitButtonVisible(boolean visible) {
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index 6aa7e06..78b3d4f 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -1259,7 +1259,7 @@
                 mIgnoreResetTaskId == -1 ? null : getTaskViewByTaskId(mIgnoreResetTaskId);
 
         int[] splitTaskIds =
-                LauncherSplitScreenListener.INSTANCE.getNoCreate().getSplitTaskIds();
+                LauncherSplitScreenListener.INSTANCE.getNoCreate().getPersistentSplitIds();
         int requiredGroupTaskViews = splitTaskIds.length / 2;
 
         // Subtract half the number of split tasks and not total number because we've already
@@ -1357,19 +1357,23 @@
             }
         }
 
+        int targetPage = -1;
         if (mNextPage == INVALID_PAGE) {
             // Set the current page to the running task, but not if settling on new task.
             if (runningTaskId != -1) {
-                setCurrentPage(indexOfChild(newRunningTaskView));
+                targetPage = indexOfChild(newRunningTaskView);
             } else if (getTaskViewCount() > 0) {
-                setCurrentPage(indexOfChild(getTaskViewAt(0)));
+                targetPage = indexOfChild(getTaskViewAt(0));
             }
         } else if (currentTaskId != -1) {
             currentTaskView = getTaskViewByTaskId(currentTaskId);
             if (currentTaskView != null) {
-                setCurrentPage(indexOfChild(currentTaskView));
+                targetPage = indexOfChild(currentTaskView);
             }
         }
+        if (targetPage != -1 && mCurrentPage != targetPage) {
+            setCurrentPage(targetPage);
+        }
 
         if (mIgnoreResetTaskId != -1 &&
                 getTaskViewByTaskId(mIgnoreResetTaskId) != ignoreResetTaskView) {
@@ -1502,7 +1506,7 @@
         mActionsView.setDp(dp);
         mOrientationState.setDeviceProfile(dp);
 
-        // Update RecentsView adn TaskView's DeviceProfile dependent layout.
+        // Update RecentsView and TaskView's DeviceProfile dependent layout.
         updateOrientationHandler();
     }
 
@@ -1959,6 +1963,9 @@
     /**
      * Called only when a swipe-up gesture from an app has completed. Only called after
      * {@link #onGestureAnimationStart} and {@link #onGestureAnimationEnd()}.
+     *
+     * TODO(b/198310766) Need to also explicitly exit split screen if
+     *  the swipe up was to home
      */
     public void onSwipeUpAnimationSuccess() {
         animateUpTaskIconScale();
@@ -2595,7 +2602,6 @@
         mFirstFloatingTaskView.setAlpha(1);
         mFirstFloatingTaskView.addAnimation(anim, startingTaskRect,
                 mTempRect, mSplitHiddenTaskView, true /*fadeWithThumbnail*/);
-        anim.addEndListener(aBoolean -> mActionsView.setSplitButtonVisible(false));
     }
 
     /**
@@ -2935,6 +2941,7 @@
                         dispatchScrollChanged();
                     }
                 }
+                updateFocusedSplitButtonVisibility();
                 onDismissAnimationEnds();
                 mPendingAnimation = null;
             }
@@ -2943,6 +2950,19 @@
     }
 
     /**
+     * Shows split button if
+     * * We're in large screen
+     * * We're not already in split
+     * * There are at least 2 tasks to invoke split
+     */
+    private void updateFocusedSplitButtonVisibility() {
+        mActionsView.setSplitButtonVisible(mActivity.getDeviceProfile().isTablet &&
+                !(getRunningTaskView() instanceof GroupedTaskView) &&
+                getTaskViewCount() > 1
+        );
+    }
+
+    /**
      * Returns all the tasks in the top row, without the focused task
      */
     private IntArray getTopRowIdArray() {
@@ -3747,7 +3767,6 @@
             mSecondSplitHiddenTaskView.setVisibility(VISIBLE);
             mSecondSplitHiddenTaskView = null;
         }
-        mActionsView.setSplitButtonVisible(true);
     }
 
     private void updateDeadZoneRects() {
@@ -3962,6 +3981,7 @@
     @Override
     protected void notifyPageSwitchListener(int prevPage) {
         super.notifyPageSwitchListener(prevPage);
+        updateFocusedSplitButtonVisibility();
         loadVisibleTaskData(TaskView.FLAG_UPDATE_ALL);
         updateEnabledOverlays();
     }
diff --git a/quickstep/src/com/android/quickstep/views/TaskView.java b/quickstep/src/com/android/quickstep/views/TaskView.java
index bfe6ca4..80f5dc4 100644
--- a/quickstep/src/com/android/quickstep/views/TaskView.java
+++ b/quickstep/src/com/android/quickstep/views/TaskView.java
@@ -1541,7 +1541,7 @@
 
         public FullscreenDrawParams(Context context) {
             mCornerRadius = TaskCornerRadius.get(context);
-            mWindowCornerRadius = QuickStepContract.getWindowCornerRadius(context.getResources());
+            mWindowCornerRadius = QuickStepContract.getWindowCornerRadius(context);
 
             mCurrentDrawnCornerRadius = mCornerRadius;
         }
diff --git a/res/drawable/padded_rounded_action_button.xml b/res/drawable/padded_rounded_action_button.xml
index 6432efd..6863f92 100644
--- a/res/drawable/padded_rounded_action_button.xml
+++ b/res/drawable/padded_rounded_action_button.xml
@@ -14,18 +14,11 @@
   ~ limitations under the License.
   -->
 
-<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:androidprv="http://schemas.android.com/apk/prv/res/android">
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item
+        android:drawable="@drawable/rounded_action_button"
         android:left="@dimen/padded_rounded_button_padding"
         android:top="@dimen/padded_rounded_button_padding"
         android:right="@dimen/padded_rounded_button_padding"
-        android:bottom="@dimen/padded_rounded_button_padding">
-        <shape android:shape="rectangle">
-            <corners android:radius="@dimen/rounded_button_radius" />
-            <stroke android:width="1dp"
-                android:color="?androidprv:attr/colorAccentPrimaryVariant" />
-        </shape>
-    </item>
+        android:bottom="@dimen/padded_rounded_button_padding" />
 </layer-list>
-
diff --git a/res/drawable/rounded_action_button.xml b/res/drawable/rounded_action_button.xml
index f043893..b9942c0 100644
--- a/res/drawable/rounded_action_button.xml
+++ b/res/drawable/rounded_action_button.xml
@@ -19,7 +19,9 @@
     xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
     android:shape="rectangle">
     <corners android:radius="@dimen/rounded_button_radius" />
-    <stroke android:width="1dp" android:color="@color/all_apps_tab_background_selected" />
+    <stroke
+        android:width="1dp"
+        android:color="?androidprv:attr/colorAccentPrimaryVariant" />
     <padding
         android:left="@dimen/rounded_button_padding"
         android:right="@dimen/rounded_button_padding" />
diff --git a/res/layout/arrow_toast.xml b/res/layout/arrow_toast.xml
index 9a6f8c3..88a92eb 100644
--- a/res/layout/arrow_toast.xml
+++ b/res/layout/arrow_toast.xml
@@ -27,15 +27,13 @@
         android:gravity="center"
         android:padding="16dp"
         android:background="@drawable/arrow_toast_rounded_background"
-        android:elevation="2dp"
-        android:outlineProvider="none"
+        android:elevation="@dimen/arrow_toast_elevation"
         android:textColor="@color/arrow_tip_view_content"
         android:textSize="14sp"/>
 
     <View
         android:id="@+id/arrow"
-        android:elevation="2dp"
-        android:outlineProvider="none"
+        android:elevation="@dimen/arrow_toast_elevation"
         android:layout_width="@dimen/arrow_toast_arrow_width"
         android:layout_height="10dp"/>
 </merge>
diff --git a/res/layout/notification_content.xml b/res/layout/notification_content.xml
index 84822a6..91897e9 100644
--- a/res/layout/notification_content.xml
+++ b/res/layout/notification_content.xml
@@ -14,10 +14,11 @@
      limitations under the License.
 -->
 
-<merge
+<com.android.launcher3.notification.NotificationMainView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content">
+    android:layout_height="wrap_content"
+    android:orientation="vertical">
 
     <!-- header -->
     <FrameLayout
@@ -49,7 +50,7 @@
     </FrameLayout>
 
     <!-- Main view -->
-    <com.android.launcher3.notification.NotificationMainView
+    <FrameLayout
         android:id="@+id/main_view"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -59,7 +60,6 @@
             android:id="@+id/text_and_background"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:background="?attr/popupColorPrimary"
             android:gravity="center_vertical"
             android:orientation="vertical"
             android:paddingTop="@dimen/notification_padding"
@@ -95,5 +95,5 @@
             android:layout_marginTop="@dimen/notification_padding"
             android:layout_marginStart="@dimen/notification_icon_padding" />
 
-    </com.android.launcher3.notification.NotificationMainView>
-</merge>
\ No newline at end of file
+    </FrameLayout>
+</com.android.launcher3.notification.NotificationMainView>
\ No newline at end of file
diff --git a/res/layout/popup_container.xml b/res/layout/popup_container.xml
index 18014bb..9327287 100644
--- a/res/layout/popup_container.xml
+++ b/res/layout/popup_container.xml
@@ -31,12 +31,9 @@
         android:elevation="@dimen/deep_shortcuts_elevation"
         android:orientation="vertical"/>
 
-    <LinearLayout
+    <com.android.launcher3.notification.NotificationContainer
         android:id="@+id/notification_container"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:visibility="gone"
-        android:background="?attr/popupColorPrimary"
-        android:elevation="@dimen/deep_shortcuts_elevation"
-        android:orientation="vertical"/>
+        android:visibility="gone"/>
 </com.android.launcher3.popup.PopupContainerWithArrow>
\ No newline at end of file
diff --git a/res/layout/system_shortcut.xml b/res/layout/system_shortcut.xml
index 89895e5..21d532e 100644
--- a/res/layout/system_shortcut.xml
+++ b/res/layout/system_shortcut.xml
@@ -17,7 +17,8 @@
 <com.android.launcher3.shortcuts.DeepShortcutView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="@dimen/bg_popup_item_width"
-    android:layout_height="@dimen/bg_popup_item_height"
+    android:layout_height="wrap_content"
+    android:minHeight="@dimen/bg_popup_item_height"
     android:elevation="@dimen/deep_shortcuts_elevation"
     android:background="@drawable/middle_item_primary"
     android:theme="@style/PopupItem" >
diff --git a/res/layout/system_shortcut_content.xml b/res/layout/system_shortcut_content.xml
index 8b39202..3ef0b94 100644
--- a/res/layout/system_shortcut_content.xml
+++ b/res/layout/system_shortcut_content.xml
@@ -22,6 +22,9 @@
         android:id="@+id/bubble_text"
         android:background="?android:attr/selectableItemBackground"
         android:gravity="start|center_vertical"
+        android:paddingTop="@dimen/bg_popup_item_vertical_padding"
+        android:paddingBottom="@dimen/bg_popup_item_vertical_padding"
+        android:minHeight="@dimen/bg_popup_item_height"
         android:textAlignment="viewStart"
         android:paddingStart="@dimen/deep_shortcuts_text_padding_start"
         android:paddingEnd="@dimen/popup_padding_end"
diff --git a/res/layout/work_apps_paused.xml b/res/layout/work_apps_paused.xml
index ec34b47..79bce70 100644
--- a/res/layout/work_apps_paused.xml
+++ b/res/layout/work_apps_paused.xml
@@ -28,7 +28,7 @@
         android:layout_marginTop="40dp"
         android:text="@string/work_apps_paused_title"
         android:textAlignment="center"
-        android:textSize="22sp" />
+        android:textSize="18sp" />
 
     <TextView
         android:layout_width="wrap_content"
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 86b4e71..5fc0480 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -110,6 +110,7 @@
     <dimen name="all_apps_tip_bottom_margin">8dp</dimen>
     <!-- The size of corner radius of the arrow in the arrow toast. -->
     <dimen name="arrow_toast_corner_radius">2dp</dimen>
+    <dimen name="arrow_toast_elevation">2dp</dimen>
     <dimen name="arrow_toast_arrow_width">10dp</dimen>
 
 <!-- Search bar in All Apps -->
@@ -240,6 +241,7 @@
     <dimen name="bg_popup_padding">2dp</dimen>
     <dimen name="bg_popup_item_width">216dp</dimen>
     <dimen name="bg_popup_item_height">56dp</dimen>
+    <dimen name="bg_popup_item_vertical_padding">12dp</dimen>
     <dimen name="pre_drag_view_scale">6dp</dimen>
     <!-- an icon with shortcuts must be dragged this far before the container is removed. -->
     <dimen name="deep_shortcuts_start_drag_threshold">16dp</dimen>
@@ -270,6 +272,8 @@
 
 <!-- Notifications -->
     <dimen name="bg_round_rect_radius">8dp</dimen>
+    <dimen name="notification_max_trans">8dp</dimen>
+    <dimen name="notification_space">8dp</dimen>
     <dimen name="notification_padding">16dp</dimen>
     <dimen name="notification_padding_top">18dp</dimen>
     <dimen name="notification_header_text_size">14sp</dimen>
@@ -346,4 +350,5 @@
     <dimen name="search_row_icon_size">48dp</dimen>
     <dimen name="search_row_small_icon_size">32dp</dimen>
     <dimen name="padded_rounded_button_padding">8dp</dimen>
+
 </resources>
diff --git a/src/com/android/launcher3/DropTargetBar.java b/src/com/android/launcher3/DropTargetBar.java
index 88f6c49..eb42a65 100644
--- a/src/com/android/launcher3/DropTargetBar.java
+++ b/src/com/android/launcher3/DropTargetBar.java
@@ -25,6 +25,7 @@
 import android.content.Context;
 import android.graphics.Rect;
 import android.util.AttributeSet;
+import android.util.Log;
 import android.util.TypedValue;
 import android.view.Gravity;
 import android.view.View;
@@ -32,10 +33,13 @@
 import android.view.ViewPropertyAnimator;
 import android.widget.FrameLayout;
 
+import androidx.annotation.NonNull;
+
 import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.dragndrop.DragController;
 import com.android.launcher3.dragndrop.DragController.DragListener;
 import com.android.launcher3.dragndrop.DragOptions;
+import com.android.launcher3.testing.TestProtocol;
 
 /*
  * The top bar containing various drop targets: Delete/App Info/Uninstall.
@@ -212,6 +216,9 @@
     }
 
     public void animateToVisibility(boolean isVisible) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "8");
+        }
         if (mVisible != isVisible) {
             mVisible = isVisible;
 
@@ -238,6 +245,9 @@
      */
     @Override
     public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "7");
+        }
         animateToVisibility(true);
     }
 
@@ -261,4 +271,12 @@
     public ButtonDropTarget[] getDropTargets() {
         return mDropTargets;
     }
+
+    @Override
+    protected void onVisibilityChanged(@NonNull View changedView, int visibility) {
+        super.onVisibilityChanged(changedView, visibility);
+        if (TestProtocol.sDebugTracing && visibility == VISIBLE) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "9");
+        }
+    }
 }
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index d5972a7..f091262 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -239,7 +239,7 @@
             "Enables scrim during app launch animation.");
 
     public static final BooleanFlag ENABLE_SPLIT_SELECT = getDebugFlag(
-            "ENABLE_SPLIT_SELECT", false, "Uses new split screen selection overview UI");
+            "ENABLE_SPLIT_SELECT", true, "Uses new split screen selection overview UI");
 
     public static final BooleanFlag ENABLE_ENFORCED_ROUNDED_CORNERS = new DeviceFlag(
             "ENABLE_ENFORCED_ROUNDED_CORNERS", true, "Enforce rounded corners on all App Widgets");
diff --git a/src/com/android/launcher3/dragndrop/DragController.java b/src/com/android/launcher3/dragndrop/DragController.java
index 1e0edac..fdb2799 100644
--- a/src/com/android/launcher3/dragndrop/DragController.java
+++ b/src/com/android/launcher3/dragndrop/DragController.java
@@ -22,6 +22,7 @@
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.util.Log;
 import android.view.DragEvent;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
@@ -34,6 +35,7 @@
 import com.android.launcher3.logging.InstanceId;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.TouchController;
 import com.android.launcher3.views.ActivityContext;
@@ -146,6 +148,9 @@
             float initialDragViewScale,
             float dragViewScaleOnDrop,
             DragOptions options) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "4");
+        }
         return startDrag(drawable, /* view= */ null, originalView, dragLayerX, dragLayerY,
                 source, dragInfo, dragOffset, dragRegion, initialDragViewScale, dragViewScaleOnDrop,
                 options);
@@ -203,6 +208,9 @@
             DragOptions options);
 
     protected void callOnDragStart() {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "6");
+        }
         if (mOptions.preDragCondition != null) {
             mOptions.preDragCondition.onPreDragEnd(mDragObject, true /* dragStarted*/);
         }
diff --git a/src/com/android/launcher3/dragndrop/LauncherDragController.java b/src/com/android/launcher3/dragndrop/LauncherDragController.java
index 0e8b0a5..dcbfa50 100644
--- a/src/com/android/launcher3/dragndrop/LauncherDragController.java
+++ b/src/com/android/launcher3/dragndrop/LauncherDragController.java
@@ -24,6 +24,7 @@
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.util.Log;
 import android.view.HapticFeedbackConstants;
 import android.view.View;
 
@@ -36,6 +37,7 @@
 import com.android.launcher3.R;
 import com.android.launcher3.accessibility.DragViewStateAnnouncer;
 import com.android.launcher3.model.data.ItemInfo;
+import com.android.launcher3.testing.TestProtocol;
 
 /**
  * Drag controller for Launcher activity
@@ -65,6 +67,9 @@
             float initialDragViewScale,
             float dragViewScaleOnDrop,
             DragOptions options) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "5");
+        }
         if (PROFILE_DRAWING_DURING_DRAG) {
             android.os.Debug.startMethodTracing("Launcher");
         }
diff --git a/src/com/android/launcher3/notification/NotificationContainer.java b/src/com/android/launcher3/notification/NotificationContainer.java
new file mode 100644
index 0000000..9eb05cd
--- /dev/null
+++ b/src/com/android/launcher3/notification/NotificationContainer.java
@@ -0,0 +1,283 @@
+/*
+ * Copyright (C) 2021 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.notification;
+
+import static com.android.launcher3.anim.Interpolators.scrollInterpolatorForVelocity;
+import static com.android.launcher3.touch.SingleAxisSwipeDetector.HORIZONTAL;
+
+import android.animation.Animator;
+import android.animation.AnimatorSet;
+import android.animation.ObjectAnimator;
+import android.content.Context;
+import android.graphics.Rect;
+import android.util.AttributeSet;
+import android.util.FloatProperty;
+import android.view.MotionEvent;
+import android.view.View;
+import android.widget.FrameLayout;
+
+import com.android.launcher3.R;
+import com.android.launcher3.anim.AnimationSuccessListener;
+import com.android.launcher3.popup.PopupContainerWithArrow;
+import com.android.launcher3.touch.BaseSwipeDetector;
+import com.android.launcher3.touch.OverScroll;
+import com.android.launcher3.touch.SingleAxisSwipeDetector;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * Class to manage the notification UI in a {@link PopupContainerWithArrow}.
+ *
+ * - Has two {@link NotificationMainView} that represent the top two notifications
+ * - Handles dismissing a notification
+ */
+public class NotificationContainer extends FrameLayout implements SingleAxisSwipeDetector.Listener {
+
+    private static final FloatProperty<NotificationContainer> DRAG_TRANSLATION_X =
+            new FloatProperty<NotificationContainer>("notificationProgress") {
+                @Override
+                public void setValue(NotificationContainer view, float transX) {
+                    view.setDragTranslationX(transX);
+                }
+
+                @Override
+                public Float get(NotificationContainer view) {
+                    return view.mDragTranslationX;
+                }
+            };
+
+    private static final Rect sTempRect = new Rect();
+
+    private final SingleAxisSwipeDetector mSwipeDetector;
+    private final List<NotificationInfo> mNotificationInfos = new ArrayList<>();
+    private boolean mIgnoreTouch = false;
+
+    private final ObjectAnimator mContentTranslateAnimator;
+    private float mDragTranslationX = 0;
+
+    private final NotificationMainView mPrimaryView;
+    private final NotificationMainView mSecondaryView;
+    private PopupContainerWithArrow mPopupContainer;
+
+    public NotificationContainer(Context context) {
+        this(context, null, 0);
+    }
+
+    public NotificationContainer(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public NotificationContainer(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        mSwipeDetector = new SingleAxisSwipeDetector(getContext(), this, HORIZONTAL);
+        mSwipeDetector.setDetectableScrollConditions(SingleAxisSwipeDetector.DIRECTION_BOTH, false);
+        mContentTranslateAnimator = ObjectAnimator.ofFloat(this, DRAG_TRANSLATION_X, 0);
+
+        mPrimaryView = (NotificationMainView) View.inflate(getContext(),
+                R.layout.notification_content, null);
+        mSecondaryView = (NotificationMainView) View.inflate(getContext(),
+                R.layout.notification_content, null);
+        mSecondaryView.setAlpha(0);
+
+        addView(mSecondaryView);
+        addView(mPrimaryView);
+
+    }
+
+    public void setPopupView(PopupContainerWithArrow popupView) {
+        mPopupContainer = popupView;
+    }
+
+    /**
+     * Returns true if we should intercept the swipe.
+     */
+    public boolean onInterceptSwipeEvent(MotionEvent ev) {
+        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
+            sTempRect.set(getLeft(), getTop(), getRight(), getBottom());
+            mIgnoreTouch = !sTempRect.contains((int) ev.getX(), (int) ev.getY());
+            if (!mIgnoreTouch) {
+                mPopupContainer.getParent().requestDisallowInterceptTouchEvent(true);
+            }
+        }
+        if (mIgnoreTouch) {
+            return false;
+        }
+        if (mPrimaryView.getNotificationInfo() == null) {
+            // The notification hasn't been populated yet.
+            return false;
+        }
+
+        mSwipeDetector.onTouchEvent(ev);
+        return mSwipeDetector.isDraggingOrSettling();
+    }
+
+    /**
+     * Returns true when we should handle the swipe.
+     */
+    public boolean onSwipeEvent(MotionEvent ev) {
+        if (mIgnoreTouch) {
+            return false;
+        }
+        if (mPrimaryView.getNotificationInfo() == null) {
+            // The notification hasn't been populated yet.
+            return false;
+        }
+        return mSwipeDetector.onTouchEvent(ev);
+    }
+
+    /**
+     * Applies the list of @param notificationInfos to this container.
+     */
+    public void applyNotificationInfos(final List<NotificationInfo> notificationInfos) {
+        mNotificationInfos.clear();
+        if (notificationInfos.isEmpty()) {
+            mPrimaryView.applyNotificationInfo(null);
+            mSecondaryView.applyNotificationInfo(null);
+            return;
+        }
+        mNotificationInfos.addAll(notificationInfos);
+
+        NotificationInfo mainNotification = notificationInfos.get(0);
+        mPrimaryView.applyNotificationInfo(mainNotification);
+        mSecondaryView.applyNotificationInfo(notificationInfos.size() > 1
+                ? notificationInfos.get(1)
+                : null);
+    }
+
+    /**
+     * Trims the notifications.
+     * @param notificationKeys List of all valid notification keys.
+     */
+    public void trimNotifications(final List<String> notificationKeys) {
+        Iterator<NotificationInfo> iterator = mNotificationInfos.iterator();
+        while (iterator.hasNext()) {
+            if (!notificationKeys.contains(iterator.next().notificationKey)) {
+                iterator.remove();
+            }
+        }
+
+        NotificationInfo primaryInfo = mNotificationInfos.size() > 0
+                ? mNotificationInfos.get(0)
+                : null;
+        NotificationInfo secondaryInfo = mNotificationInfos.size() > 1
+                ? mNotificationInfos.get(1)
+                : null;
+
+        mPrimaryView.applyNotificationInfo(primaryInfo);
+        mSecondaryView.applyNotificationInfo(secondaryInfo);
+
+        mPrimaryView.onPrimaryDrag(0);
+        mSecondaryView.onSecondaryDrag(0);
+    }
+
+    private void setDragTranslationX(float translationX) {
+        mDragTranslationX = translationX;
+
+        float progress = translationX / getWidth();
+        mPrimaryView.onPrimaryDrag(progress);
+        if (mSecondaryView.getNotificationInfo() == null) {
+            mSecondaryView.setAlpha(0f);
+        } else {
+            mSecondaryView.onSecondaryDrag(progress);
+        }
+    }
+
+    // SingleAxisSwipeDetector.Listener's
+    @Override
+    public void onDragStart(boolean start, float startDisplacement) {
+        mPopupContainer.showArrow(false);
+    }
+
+    @Override
+    public boolean onDrag(float displacement) {
+        if (!mPrimaryView.canChildBeDismissed()) {
+            displacement = OverScroll.dampedScroll(displacement, getWidth());
+        }
+
+        float progress = displacement / getWidth();
+        mPrimaryView.onPrimaryDrag(progress);
+        if (mSecondaryView.getNotificationInfo() == null) {
+            mSecondaryView.setAlpha(0f);
+        } else {
+            mSecondaryView.onSecondaryDrag(progress);
+        }
+        mContentTranslateAnimator.cancel();
+        return true;
+    }
+
+    @Override
+    public void onDragEnd(float velocity) {
+        final boolean willExit;
+        final float endTranslation;
+        final float startTranslation = mPrimaryView.getTranslationX();
+        final float width = getWidth();
+
+        if (!mPrimaryView.canChildBeDismissed()) {
+            willExit = false;
+            endTranslation = 0;
+        } else if (mSwipeDetector.isFling(velocity)) {
+            willExit = true;
+            endTranslation = velocity < 0 ? -width : width;
+        } else if (Math.abs(startTranslation) > width / 2f) {
+            willExit = true;
+            endTranslation = (startTranslation < 0 ? -width : width);
+        } else {
+            willExit = false;
+            endTranslation = 0;
+        }
+
+        long duration = BaseSwipeDetector.calculateDuration(velocity,
+                (endTranslation - startTranslation) / width);
+
+        mContentTranslateAnimator.removeAllListeners();
+        mContentTranslateAnimator.setDuration(duration)
+                .setInterpolator(scrollInterpolatorForVelocity(velocity));
+        mContentTranslateAnimator.setFloatValues(startTranslation, endTranslation);
+
+        NotificationMainView current = mPrimaryView;
+        mContentTranslateAnimator.addListener(new AnimationSuccessListener() {
+            @Override
+            public void onAnimationSuccess(Animator animator) {
+                mSwipeDetector.finishedScrolling();
+                if (willExit) {
+                    current.onChildDismissed();
+                }
+                mPopupContainer.showArrow(true);
+            }
+        });
+        mContentTranslateAnimator.start();
+    }
+
+    /**
+     * Animates the background color to a new color.
+     * @param color The color to change to.
+     * @param animatorSetOut The AnimatorSet where we add the color animator to.
+     */
+    public void updateBackgroundColor(int color, AnimatorSet animatorSetOut) {
+        mPrimaryView.updateBackgroundColor(color, animatorSetOut);
+        mSecondaryView.updateBackgroundColor(color, animatorSetOut);
+    }
+
+    /**
+     * Updates the header with a new @param notificationCount.
+     */
+    public void updateHeader(int notificationCount) {
+        mPrimaryView.updateHeader(notificationCount);
+        mSecondaryView.updateHeader(notificationCount - 1);
+    }
+}
diff --git a/src/com/android/launcher3/notification/NotificationItemView.java b/src/com/android/launcher3/notification/NotificationItemView.java
deleted file mode 100644
index af943a6..0000000
--- a/src/com/android/launcher3/notification/NotificationItemView.java
+++ /dev/null
@@ -1,179 +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.notification;
-
-import android.animation.AnimatorSet;
-import android.content.Context;
-import android.graphics.Outline;
-import android.graphics.Rect;
-import android.view.MotionEvent;
-import android.view.View;
-import android.view.ViewGroup;
-import android.view.ViewGroup.MarginLayoutParams;
-import android.view.ViewOutlineProvider;
-import android.widget.TextView;
-
-import com.android.launcher3.R;
-import com.android.launcher3.popup.PopupContainerWithArrow;
-import com.android.launcher3.util.Themes;
-
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Utility class to manage notification UI
- */
-public class NotificationItemView {
-
-    private static final Rect sTempRect = new Rect();
-
-    private final Context mContext;
-    private final PopupContainerWithArrow mPopupContainer;
-    private final ViewGroup mRootView;
-
-    private final TextView mHeaderCount;
-    private final NotificationMainView mMainView;
-
-    private final View mHeader;
-
-    private View mGutter;
-
-    private boolean mIgnoreTouch = false;
-    private List<NotificationInfo> mNotificationInfos = new ArrayList<>();
-
-    public NotificationItemView(PopupContainerWithArrow container, ViewGroup rootView) {
-        mPopupContainer = container;
-        mRootView = rootView;
-        mContext = container.getContext();
-
-        mHeaderCount = container.findViewById(R.id.notification_count);
-        mMainView = container.findViewById(R.id.main_view);
-
-        mHeader = container.findViewById(R.id.header);
-
-        float radius = Themes.getDialogCornerRadius(mContext);
-        rootView.setClipToOutline(true);
-        rootView.setOutlineProvider(new ViewOutlineProvider() {
-            @Override
-            public void getOutline(View view, Outline outline) {
-                outline.setRoundRect(0, 0, view.getWidth(), view.getHeight(), radius);
-            }
-        });
-    }
-
-    /**
-     * Animates the background color to a new color.
-     * @param color The color to change to.
-     * @param animatorSetOut The AnimatorSet where we add the color animator to.
-     */
-    public void updateBackgroundColor(int color, AnimatorSet animatorSetOut) {
-        mMainView.updateBackgroundColor(color, animatorSetOut);
-    }
-
-    public void addGutter() {
-        if (mGutter == null) {
-            mGutter = mPopupContainer.inflateAndAdd(R.layout.notification_gutter, mRootView);
-        }
-    }
-
-    public void inverseGutterMargin() {
-        MarginLayoutParams lp = (MarginLayoutParams) mGutter.getLayoutParams();
-        int top = lp.topMargin;
-        lp.topMargin = lp.bottomMargin;
-        lp.bottomMargin = top;
-    }
-
-    public void removeAllViews() {
-        mRootView.removeView(mMainView);
-        mRootView.removeView(mHeader);
-        if (mGutter != null) {
-            mRootView.removeView(mGutter);
-        }
-    }
-
-    /**
-     * Updates the header text.
-     * @param notificationCount The number of notifications.
-     */
-    public void updateHeader(int notificationCount) {
-        final String text;
-        final int visibility;
-        if (notificationCount <= 1) {
-            text = "";
-            visibility = View.INVISIBLE;
-        } else {
-            text = String.valueOf(notificationCount);
-            visibility = View.VISIBLE;
-
-        }
-        mHeaderCount.setText(text);
-        mHeaderCount.setVisibility(visibility);
-    }
-
-    public boolean onInterceptTouchEvent(MotionEvent ev) {
-        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
-            sTempRect.set(mRootView.getLeft(), mRootView.getTop(),
-                    mRootView.getRight(), mRootView.getBottom());
-            mIgnoreTouch = !sTempRect.contains((int) ev.getX(), (int) ev.getY());
-            if (!mIgnoreTouch) {
-                mPopupContainer.getParent().requestDisallowInterceptTouchEvent(true);
-            }
-        }
-        if (mIgnoreTouch) {
-            return false;
-        }
-        if (mMainView.getNotificationInfo() == null) {
-            // The notification hasn't been populated yet.
-            return false;
-        }
-
-        return false;
-    }
-
-    public void applyNotificationInfos(final List<NotificationInfo> notificationInfos) {
-        mNotificationInfos.clear();
-        if (notificationInfos.isEmpty()) {
-            return;
-        }
-        mNotificationInfos.addAll(notificationInfos);
-
-        NotificationInfo mainNotification = notificationInfos.get(0);
-        mMainView.applyNotificationInfo(mainNotification, false);
-    }
-
-    public void trimNotifications(final List<String> notificationKeys) {
-        NotificationInfo currentMainNotificationInfo = mMainView.getNotificationInfo();
-        boolean shouldUpdateMainNotification = !notificationKeys.contains(
-                currentMainNotificationInfo.notificationKey);
-
-        if (shouldUpdateMainNotification) {
-            int size = notificationKeys.size();
-            NotificationInfo nextNotification = null;
-            // We get the latest notification by finding the notification after the one that was
-            // just dismissed.
-            for (int i = 0; i < size; ++i) {
-                if (currentMainNotificationInfo == mNotificationInfos.get(i) && i + 1 < size) {
-                    nextNotification = mNotificationInfos.get(i + 1);
-                    break;
-                }
-            }
-            if (nextNotification != null) {
-                mMainView.applyNotificationInfo(nextNotification, true);
-            }
-        }
-    }
-}
diff --git a/src/com/android/launcher3/notification/NotificationMainView.java b/src/com/android/launcher3/notification/NotificationMainView.java
index b8aa824..f9ff8a6 100644
--- a/src/com/android/launcher3/notification/NotificationMainView.java
+++ b/src/com/android/launcher3/notification/NotificationMainView.java
@@ -16,62 +16,70 @@
 
 package com.android.launcher3.notification;
 
+import static com.android.launcher3.Utilities.mapToRange;
+import static com.android.launcher3.anim.Interpolators.LINEAR;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_NOTIFICATION_DISMISSED;
 
 import android.animation.AnimatorSet;
-import android.animation.ObjectAnimator;
 import android.animation.ValueAnimator;
 import android.annotation.TargetApi;
 import android.content.Context;
-import android.graphics.Color;
-import android.graphics.drawable.ColorDrawable;
+import android.graphics.Outline;
+import android.graphics.Rect;
+import android.graphics.drawable.GradientDrawable;
 import android.os.Build;
 import android.text.TextUtils;
 import android.util.AttributeSet;
-import android.util.FloatProperty;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.FrameLayout;
+import android.view.ViewOutlineProvider;
+import android.widget.LinearLayout;
 import android.widget.TextView;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
 import com.android.launcher3.model.data.ItemInfo;
-import com.android.launcher3.touch.SingleAxisSwipeDetector;
+import com.android.launcher3.util.Themes;
 
 /**
  * A {@link android.widget.FrameLayout} that contains a single notification,
  * e.g. icon + title + text.
  */
 @TargetApi(Build.VERSION_CODES.N)
-public class NotificationMainView extends FrameLayout {
-
-    private static final FloatProperty<NotificationMainView> CONTENT_TRANSLATION =
-            new FloatProperty<NotificationMainView>("contentTranslation") {
-        @Override
-        public void setValue(NotificationMainView view, float v) {
-            view.setContentTranslation(v);
-        }
-
-        @Override
-        public Float get(NotificationMainView view) {
-            return view.mTextAndBackground.getTranslationX();
-        }
-    };
+public class NotificationMainView extends LinearLayout {
 
     // This is used only to track the notification view, so that it can be properly logged.
     public static final ItemInfo NOTIFICATION_ITEM_INFO = new ItemInfo();
 
+    // Value when the primary notification main view will be gone (zero alpha).
+    private static final float PRIMARY_GONE_PROGRESS = 0.7f;
+    private static final float PRIMARY_MIN_PROGRESS = 0.40f;
+    private static final float PRIMARY_MAX_PROGRESS = 0.60f;
+    private static final float SECONDARY_MIN_PROGRESS = 0.30f;
+    private static final float SECONDARY_MAX_PROGRESS = 0.50f;
+    private static final float SECONDARY_CONTENT_MAX_PROGRESS = 0.6f;
+
     private NotificationInfo mNotificationInfo;
-    private ViewGroup mTextAndBackground;
     private int mBackgroundColor;
     private TextView mTitleView;
     private TextView mTextView;
     private View mIconView;
 
-    private SingleAxisSwipeDetector mSwipeDetector;
+    private View mHeader;
+    private View mMainView;
 
-    private final ColorDrawable mColorDrawable;
+    private TextView mHeaderCount;
+    private final Rect mOutline = new Rect();
+
+    // Space between notifications during swipe
+    private final int mNotificationSpace;
+    private final int mMaxTransX;
+    private final int mMaxElevation;
+
+    private final GradientDrawable mBackground;
 
     public NotificationMainView(Context context) {
         this(context, null, 0);
@@ -82,28 +90,77 @@
     }
 
     public NotificationMainView(Context context, AttributeSet attrs, int defStyle) {
-        super(context, attrs, defStyle);
+        this(context, attrs, defStyle, 0);
+    }
 
-        mColorDrawable = new ColorDrawable(Color.TRANSPARENT);
+    public NotificationMainView(Context context, AttributeSet attrs, int defStyle, int defStylRes) {
+        super(context, attrs, defStyle, defStylRes);
+
+        float outlineRadius = Themes.getDialogCornerRadius(context);
+
+        mBackground = new GradientDrawable();
+        mBackground.setColor(Themes.getAttrColor(context, R.attr.popupColorPrimary));
+        mBackground.setCornerRadius(outlineRadius);
+        setBackground(mBackground);
+
+        mMaxElevation = getResources().getDimensionPixelSize(R.dimen.deep_shortcuts_elevation);
+        setElevation(mMaxElevation);
+
+        mMaxTransX = getResources().getDimensionPixelSize(R.dimen.notification_max_trans);
+        mNotificationSpace = getResources().getDimensionPixelSize(R.dimen.notification_space);
+
+        setClipToOutline(true);
+        setOutlineProvider(new ViewOutlineProvider() {
+            @Override
+            public void getOutline(View view, Outline outline) {
+                outline.setRoundRect(mOutline, outlineRadius);
+            }
+        });
+    }
+
+    /**
+     * Updates the header text.
+     * @param notificationCount The number of notifications.
+     */
+    public void updateHeader(int notificationCount) {
+        final String text;
+        final int visibility;
+        if (notificationCount <= 1) {
+            text = "";
+            visibility = View.INVISIBLE;
+        } else {
+            text = String.valueOf(notificationCount);
+            visibility = View.VISIBLE;
+
+        }
+        mHeaderCount.setText(text);
+        mHeaderCount.setVisibility(visibility);
     }
 
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
 
-        mTextAndBackground = findViewById(R.id.text_and_background);
-        mTitleView = mTextAndBackground.findViewById(R.id.title);
-        mTextView = mTextAndBackground.findViewById(R.id.text);
+        ViewGroup textAndBackground = findViewById(R.id.text_and_background);
+        mTitleView = textAndBackground.findViewById(R.id.title);
+        mTextView = textAndBackground.findViewById(R.id.text);
         mIconView = findViewById(R.id.popup_item_icon);
+        mHeaderCount = findViewById(R.id.notification_count);
 
-        ColorDrawable colorBackground = (ColorDrawable) mTextAndBackground.getBackground();
-        updateBackgroundColor(colorBackground.getColor());
+        mHeader = findViewById(R.id.header);
+        mMainView = findViewById(R.id.main_view);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        mOutline.set(0, 0, getWidth(), getHeight());
+        invalidateOutline();
     }
 
     private void updateBackgroundColor(int color) {
         mBackgroundColor = color;
-        mColorDrawable.setColor(color);
-        mTextAndBackground.setBackground(mColorDrawable);
+        mBackground.setColor(color);
         if (mNotificationInfo != null) {
             mIconView.setBackground(mNotificationInfo.getIconForBackground(getContext(),
                     mBackgroundColor));
@@ -128,8 +185,11 @@
     /**
      * Sets the content of this view, animating it after a new icon shifts up if necessary.
      */
-    public void applyNotificationInfo(NotificationInfo mainNotification, boolean animate) {
-        mNotificationInfo = mainNotification;
+    public void applyNotificationInfo(NotificationInfo notificationInfo) {
+        mNotificationInfo = notificationInfo;
+        if (notificationInfo == null) {
+            return;
+        }
         NotificationListener listener = NotificationListener.getInstanceIfConnected();
         if (listener != null) {
             listener.setNotificationsShown(new String[] {mNotificationInfo.notificationKey});
@@ -149,25 +209,112 @@
         if (mNotificationInfo.intent != null) {
             setOnClickListener(mNotificationInfo);
         }
-        setContentTranslation(0);
+
         // Add a stub ItemInfo so that logging populates the correct container and item types
         // instead of DEFAULT_CONTAINERTYPE and DEFAULT_ITEMTYPE, respectively.
         setTag(NOTIFICATION_ITEM_INFO);
-        if (animate) {
-            ObjectAnimator.ofFloat(mTextAndBackground, ALPHA, 0, 1).setDuration(150).start();
+    }
+
+    /**
+     * Sets the alpha of only the child views.
+     */
+    public void setContentAlpha(float alpha) {
+        mHeader.setAlpha(alpha);
+        mMainView.setAlpha(alpha);
+    }
+
+    /**
+     * Sets the translation of only the child views.
+     */
+    public void setContentTranslationX(float transX) {
+        mHeader.setTranslationX(transX);
+        mMainView.setTranslationX(transX);
+    }
+
+    /**
+     * Updates the alpha, content alpha, and elevation of this view.
+     *
+     * @param progress Range from [0, 1] or [-1, 0]
+     *                 When 0: Full alpha
+     *                 When 1/-1: zero alpha
+     */
+    public void onPrimaryDrag(float progress) {
+        float absProgress = Math.abs(progress);
+        final int width = getWidth();
+
+        float min = PRIMARY_MIN_PROGRESS;
+        float max = PRIMARY_MAX_PROGRESS;
+
+        if (absProgress < min) {
+            setAlpha(1f);
+            setContentAlpha(1);
+            setElevation(mMaxElevation);
+        } else if (absProgress < max) {
+            setAlpha(1f);
+            setContentAlpha(mapToRange(absProgress, min, max, 1f, 0f, LINEAR));
+            setElevation(Utilities.mapToRange(absProgress, min, max, mMaxElevation, 0, LINEAR));
+        } else {
+            setAlpha(mapToRange(absProgress, max, PRIMARY_GONE_PROGRESS, 1f, 0f, LINEAR));
+            setContentAlpha(0f);
+            setElevation(0f);
         }
+
+        setTranslationX(width * progress);
     }
 
-    public void setContentTranslation(float translation) {
-        mTextAndBackground.setTranslationX(translation);
-        mIconView.setTranslationX(translation);
+    /**
+     * Updates the alpha, content alpha, elevation, and clipping of this view.
+     * @param progress Range from [0, 1] or [-1, 0]
+      *                 When 0: Smallest clipping, zero alpha
+      *                 When 1/-1: Full clip, full alpha
+     */
+    public void onSecondaryDrag(float progress) {
+        final float absProgress = Math.abs(progress);
+
+        float min = SECONDARY_MIN_PROGRESS;
+        float max = SECONDARY_MAX_PROGRESS;
+        float contentMax = SECONDARY_CONTENT_MAX_PROGRESS;
+
+        if (absProgress < min) {
+            setAlpha(0f);
+            setContentAlpha(0);
+            setElevation(0f);
+        } else if (absProgress < max) {
+            setAlpha(mapToRange(absProgress, min, max, 0, 1f, LINEAR));
+            setContentAlpha(0f);
+            setElevation(0f);
+        } else {
+            setAlpha(1f);
+            setContentAlpha(absProgress > contentMax
+                    ? 1f
+                    : mapToRange(absProgress, max, contentMax, 0, 1f, LINEAR));
+            setElevation(Utilities.mapToRange(absProgress, max, 1, 0, mMaxElevation, LINEAR));
+        }
+
+        final int width = getWidth();
+        int crop = (int) (width * absProgress);
+        int space = (int) (absProgress > PRIMARY_GONE_PROGRESS
+                ? mapToRange(absProgress, PRIMARY_GONE_PROGRESS, 1f, mNotificationSpace, 0, LINEAR)
+                : mNotificationSpace);
+        if (progress < 0) {
+            mOutline.left = Math.max(0, getWidth() - crop + space);
+            mOutline.right = getWidth();
+        } else {
+            mOutline.right = Math.min(getWidth(), crop - space);
+            mOutline.left = 0;
+        }
+
+        float contentTransX = mMaxTransX * (1f - absProgress);
+        setContentTranslationX(progress < 0
+                ? contentTransX
+                : -contentTransX);
+        invalidateOutline();
     }
 
-    public NotificationInfo getNotificationInfo() {
+    public @Nullable NotificationInfo getNotificationInfo() {
         return mNotificationInfo;
     }
 
-
     public boolean canChildBeDismissed() {
         return mNotificationInfo != null && mNotificationInfo.dismissable;
     }
diff --git a/src/com/android/launcher3/popup/ArrowPopup.java b/src/com/android/launcher3/popup/ArrowPopup.java
index 3bb49f5..112a24e 100644
--- a/src/com/android/launcher3/popup/ArrowPopup.java
+++ b/src/com/android/launcher3/popup/ArrowPopup.java
@@ -467,6 +467,13 @@
         return getMeasuredWidth() - mArrowOffsetHorizontal - mArrowWidth;
     }
 
+    /**
+     * @param show If true, shows arrow (when applicable), otherwise hides arrow.
+     */
+    public void showArrow(boolean show) {
+        mArrow.setVisibility(show && shouldAddArrow() ? VISIBLE : INVISIBLE);
+    }
+
     private void addArrow() {
         getPopupContainer().addView(mArrow);
         mArrow.setX(getX() + getArrowLeft());
diff --git a/src/com/android/launcher3/popup/PopupContainerWithArrow.java b/src/com/android/launcher3/popup/PopupContainerWithArrow.java
index 18f263a..bc3419a 100644
--- a/src/com/android/launcher3/popup/PopupContainerWithArrow.java
+++ b/src/com/android/launcher3/popup/PopupContainerWithArrow.java
@@ -58,8 +58,8 @@
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.ItemInfoWithIcon;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
+import com.android.launcher3.notification.NotificationContainer;
 import com.android.launcher3.notification.NotificationInfo;
-import com.android.launcher3.notification.NotificationItemView;
 import com.android.launcher3.notification.NotificationKeyData;
 import com.android.launcher3.popup.PopupDataProvider.PopupDataChangeListener;
 import com.android.launcher3.shortcuts.DeepShortcutView;
@@ -92,9 +92,8 @@
     private final int mStartDragThreshold;
 
     private BubbleTextView mOriginalIcon;
-    private NotificationItemView mNotificationItemView;
     private int mNumNotifications;
-    private ViewGroup mNotificationContainer;
+    private NotificationContainer mNotificationContainer;
 
     private ViewGroup mWidgetContainer;
 
@@ -128,8 +127,8 @@
         if (ev.getAction() == MotionEvent.ACTION_DOWN) {
             mInterceptTouchDown.set(ev.getX(), ev.getY());
         }
-        if (mNotificationItemView != null
-                && mNotificationItemView.onInterceptTouchEvent(ev)) {
+        if (mNotificationContainer != null
+                && mNotificationContainer.onInterceptSwipeEvent(ev)) {
             return true;
         }
         // Stop sending touch events to deep shortcut views if user moved beyond touch slop.
@@ -138,6 +137,14 @@
     }
 
     @Override
+    public boolean onTouchEvent(MotionEvent ev) {
+        if (mNotificationContainer != null) {
+            return mNotificationContainer.onSwipeEvent(ev) || super.onTouchEvent(ev);
+        }
+        return super.onTouchEvent(ev);
+    }
+
+    @Override
     protected boolean isOfType(int type) {
         return (type & TYPE_ACTION_POPUP) != 0;
     }
@@ -172,8 +179,8 @@
     @Override
     protected void setChildColor(View view, int color, AnimatorSet animatorSetOut) {
         super.setChildColor(view, color, animatorSetOut);
-        if (view.getId() == R.id.notification_container && mNotificationItemView != null) {
-            mNotificationItemView.updateBackgroundColor(color, animatorSetOut);
+        if (view.getId() == R.id.notification_container && mNotificationContainer != null) {
+            mNotificationContainer.updateBackgroundColor(color, animatorSetOut);
         }
     }
 
@@ -232,13 +239,6 @@
                 mNotificationContainer);
     }
 
-    @Override
-    protected void onInflationComplete(boolean isReversed) {
-        if (isReversed && mNotificationItemView != null) {
-            mNotificationItemView.inverseGutterMargin();
-        }
-    }
-
     @TargetApi(Build.VERSION_CODES.P)
     public void populateAndShow(final BubbleTextView originalIcon, int shortcutCount,
             final List<NotificationKeyData> notificationKeys, List<SystemShortcut> systemShortcuts) {
@@ -261,9 +261,10 @@
             if (mNotificationContainer == null) {
                 mNotificationContainer = findViewById(R.id.notification_container);
                 mNotificationContainer.setVisibility(VISIBLE);
+                mNotificationContainer.setPopupView(this);
+            } else {
+                mNotificationContainer.setVisibility(GONE);
             }
-            View.inflate(getContext(), R.layout.notification_content, mNotificationContainer);
-            mNotificationItemView = new NotificationItemView(this, mNotificationContainer);
             updateNotificationHeader();
         }
         int viewsToFlip = getChildCount();
@@ -274,10 +275,6 @@
         if (hasDeepShortcuts) {
             mDeepShortcutContainer.setVisibility(View.VISIBLE);
 
-            if (mNotificationItemView != null) {
-                mNotificationItemView.addGutter();
-            }
-
             for (int i = shortcutCount; i > 0; i--) {
                 DeepShortcutView v = inflateAndAdd(R.layout.deep_shortcut, mDeepShortcutContainer);
                 v.getLayoutParams().width = containerWidth;
@@ -309,10 +306,6 @@
         } else {
             mDeepShortcutContainer.setVisibility(View.GONE);
             if (!systemShortcuts.isEmpty()) {
-                if (mNotificationItemView != null) {
-                    mNotificationItemView.addGutter();
-                }
-
                 for (SystemShortcut shortcut : systemShortcuts) {
                     initializeSystemShortcut(R.layout.system_shortcut, this, shortcut);
                 }
@@ -355,13 +348,13 @@
     }
 
     public void applyNotificationInfos(List<NotificationInfo> notificationInfos) {
-        if (mNotificationItemView != null) {
-            mNotificationItemView.applyNotificationInfos(notificationInfos);
+        if (mNotificationContainer != null) {
+            mNotificationContainer.applyNotificationInfos(notificationInfos);
         }
     }
 
     private void updateHiddenShortcuts() {
-        int allowedCount = mNotificationItemView != null
+        int allowedCount = mNotificationContainer != null
                 ? MAX_SHORTCUTS_IF_NOTIFICATIONS : MAX_SHORTCUTS;
 
         int total = mShortcuts.size();
@@ -447,8 +440,8 @@
     private void updateNotificationHeader() {
         ItemInfoWithIcon itemInfo = (ItemInfoWithIcon) mOriginalIcon.getTag();
         DotInfo dotInfo = mLauncher.getDotInfoForItem(itemInfo);
-        if (mNotificationItemView != null && dotInfo != null) {
-            mNotificationItemView.updateHeader(dotInfo.getNotificationCount());
+        if (mNotificationContainer != null && dotInfo != null) {
+            mNotificationContainer.updateHeader(dotInfo.getNotificationCount());
         }
     }
 
@@ -590,20 +583,18 @@
 
         @Override
         public void trimNotifications(Map<PackageUserKey, DotInfo> updatedDots) {
-            if (mNotificationItemView == null) {
+            if (mNotificationContainer == null) {
                 return;
             }
             ItemInfo originalInfo = (ItemInfo) mOriginalIcon.getTag();
             DotInfo dotInfo = updatedDots.get(PackageUserKey.fromItemInfo(originalInfo));
             if (dotInfo == null || dotInfo.getNotificationKeys().size() == 0) {
                 // No more notifications, remove the notification views and expand all shortcuts.
-                mNotificationItemView.removeAllViews();
-                mNotificationItemView = null;
                 mNotificationContainer.setVisibility(GONE);
                 updateHiddenShortcuts();
                 assignMarginsAndBackgrounds(PopupContainerWithArrow.this);
             } else {
-                mNotificationItemView.trimNotifications(
+                mNotificationContainer.trimNotifications(
                         NotificationKeyData.extractKeysOnly(dotInfo.getNotificationKeys()));
             }
         }
diff --git a/src/com/android/launcher3/testing/TestProtocol.java b/src/com/android/launcher3/testing/TestProtocol.java
index c484811..ed52e20 100644
--- a/src/com/android/launcher3/testing/TestProtocol.java
+++ b/src/com/android/launcher3/testing/TestProtocol.java
@@ -117,7 +117,7 @@
     public static final String PERMANENT_DIAG_TAG = "TaplTarget";
     public static final String WORK_PROFILE_REMOVED = "b/159671700";
     public static final String FALLBACK_ACTIVITY_NO_SET = "b/181019015";
-    public static final String THIRD_PARTY_LAUNCHER_NOT_SET = "b/187080582";
     public static final String TASK_VIEW_ID_CRASH = "b/195430732";
     public static final String L3_SWIPE_TO_HOME = "b/192018189";
+    public static final String NO_DROP_TARGET = "b/195031154";
 }
diff --git a/src/com/android/launcher3/widget/BaseWidgetSheet.java b/src/com/android/launcher3/widget/BaseWidgetSheet.java
index b6cec12..00a0050 100644
--- a/src/com/android/launcher3/widget/BaseWidgetSheet.java
+++ b/src/com/android/launcher3/widget/BaseWidgetSheet.java
@@ -19,6 +19,7 @@
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.util.AttributeSet;
+import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnLongClickListener;
@@ -108,6 +109,9 @@
 
     @Override
     public boolean onLongClick(View v) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "1");
+        }
         TestLogging.recordEvent(TestProtocol.SEQUENCE_MAIN, "Widgets.onLongClick");
         v.cancelLongPress();
         if (!ItemLongClickListener.canStartDrag(mActivityContext)) return false;
@@ -178,6 +182,9 @@
     }
 
     private boolean beginDraggingWidget(WidgetCell v) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "2");
+        }
         // Get the widget preview as the drag representation
         WidgetImageView image = v.getWidgetView();
 
diff --git a/src/com/android/launcher3/widget/PendingItemDragHelper.java b/src/com/android/launcher3/widget/PendingItemDragHelper.java
index 2347d28..463f4ac 100644
--- a/src/com/android/launcher3/widget/PendingItemDragHelper.java
+++ b/src/com/android/launcher3/widget/PendingItemDragHelper.java
@@ -22,6 +22,7 @@
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.util.Log;
 import android.util.Size;
 import android.view.View;
 import android.view.View.MeasureSpec;
@@ -41,6 +42,7 @@
 import com.android.launcher3.icons.FastBitmapDrawable;
 import com.android.launcher3.icons.LauncherIcons;
 import com.android.launcher3.icons.RoundDrawableWrapper;
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.widget.dragndrop.AppWidgetHostViewDragListener;
 import com.android.launcher3.widget.util.WidgetSizes;
 
@@ -94,6 +96,9 @@
      */
     public void startDrag(Rect previewBounds, int previewBitmapWidth, int previewViewWidth,
             Point screenPos, DragSource source, DragOptions options) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "3");
+        }
         final Launcher launcher = Launcher.getLauncher(mView.getContext());
         LauncherAppState app = LauncherAppState.getInstance(launcher);