diff --git a/SharedLibWrapper/build.gradle b/SharedLibWrapper/build.gradle
new file mode 100644
index 0000000..674e38a
--- /dev/null
+++ b/SharedLibWrapper/build.gradle
@@ -0,0 +1,17 @@
+apply plugin: 'java'
+
+final String ANDROID_TOP = "${rootDir}/../../.."
+final String FRAMEWORK_PREBUILTS_DIR = "${ANDROID_TOP}/prebuilts/framework_intermediates/"
+
+sourceSets {
+    main {
+        java.srcDirs = ["${ANDROID_TOP}/frameworks/lib/systemui/SharedLibWrapper/src"]
+    }
+}
+
+sourceCompatibility = 1.8
+
+dependencies {
+    implementation fileTree(dir: "${FRAMEWORK_PREBUILTS_DIR}/quickstep/libs", include: 'sysui_shared.jar')
+    compileOnly fileTree(dir: "$ANDROID_TOP/prebuilts/fullsdk-${org.gradle.internal.os.OperatingSystem.current().isMacOsX() ? "darwin" : "linux"}/platforms/${COMPILE_SDK}", include: 'android.jar')
+}
diff --git a/build.gradle b/build.gradle
index e296455..534ca65 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,6 +2,7 @@
     repositories {
         mavenCentral()
         google()
+        jcenter()
     }
     dependencies {
         classpath GRADLE_CLASS_PATH
@@ -62,12 +63,6 @@
             minSdkVersion 28
         }
 
-        withQuickstepIconRecents {
-            dimension "recents"
-
-            minSdkVersion 28
-        }
-
         withoutQuickstep {
             dimension "recents"
         }
@@ -78,11 +73,6 @@
         if (variant.buildType.name.endsWith('release')) {
             variant.setIgnore(true)
         }
-
-        // Icon recents is Go only
-        if (name.contains("WithQuickstepIconRecents") && !name.contains("l3go")) {
-            variant.setIgnore(true)
-        }
     }
 
     sourceSets {
@@ -96,10 +86,6 @@
             }
         }
 
-        debug {
-            manifest.srcFile "AndroidManifest.xml"
-        }
-
         androidTest {
             res.srcDirs = ['tests/res']
             java.srcDirs = ['tests/src', 'tests/tapl']
@@ -112,15 +98,30 @@
 
         aosp {
             java.srcDirs = ['src_flags', 'src_shortcuts_overrides']
+        }
+
+        aospWithoutQuickstep {
             manifest.srcFile "AndroidManifest.xml"
         }
 
+        aospWithQuickstep {
+            manifest.srcFile "quickstep/AndroidManifest-launcher.xml"
+        }
+
         l3go {
             res.srcDirs = ['go/res']
             java.srcDirs = ['go/src']
             manifest.srcFile "go/AndroidManifest.xml"
         }
 
+        l3goWithoutQuickstepDebug {
+            manifest.srcFile "AndroidManifest.xml"
+        }
+
+        l3goWithQuickstepDebug {
+            manifest.srcFile "quickstep/AndroidManifest-launcher.xml"
+        }
+
         withoutQuickstep {
             java.srcDirs = ['src_ui_overrides']
         }
@@ -130,20 +131,17 @@
             java.srcDirs = ['quickstep/src', 'quickstep/recents_ui_overrides/src']
             manifest.srcFile "quickstep/AndroidManifest.xml"
         }
-
-        withQuickstepIconRecents {
-            res.srcDirs = ['quickstep/res', 'go/quickstep/res']
-            java.srcDirs = ['quickstep/src', 'go/quickstep/src']
-            manifest.srcFile "quickstep/AndroidManifest.xml"
-        }
     }
 }
 
-repositories {
-    maven { url "../../../prebuilts/fullsdk-darwin/extras/android/m2repository" }
-    maven { url "../../../prebuilts/fullsdk-linux/extras/android/m2repository" }
-    mavenCentral()
-    google()
+allprojects {
+    repositories {
+        maven { url "../../../prebuilts/sdk/current/androidx/m2repository" }
+        maven { url "../../../prebuilts/fullsdk-darwin/extras/android/m2repository" }
+        maven { url "../../../prebuilts/fullsdk-linux/extras/android/m2repository" }
+        mavenCentral()
+        google()
+    }
 }
 
 dependencies {
@@ -151,14 +149,12 @@
     implementation "androidx.recyclerview:recyclerview:${ANDROID_X_VERSION}"
     implementation "androidx.preference:preference:${ANDROID_X_VERSION}"
     implementation project(':IconLoader')
+    withQuickstepImplementation project(':SharedLibWrapper')
     implementation fileTree(dir: "${FRAMEWORK_PREBUILTS_DIR}/libs", include: 'launcher_protos.jar')
 
     // Recents lib dependency
     withQuickstepImplementation fileTree(dir: "${FRAMEWORK_PREBUILTS_DIR}/quickstep/libs", include: 'sysui_shared.jar')
 
-    // Recents lib dependency for Go
-    withQuickstepIconRecentsImplementation fileTree(dir: "${FRAMEWORK_PREBUILTS_DIR}/quickstep/libs", include: 'sysui_shared.jar')
-
     // Required for AOSP to compile. This is already included in the sysui_shared.jar
     withoutQuickstepImplementation fileTree(dir: "${FRAMEWORK_PREBUILTS_DIR}/libs", include: 'plugin_core.jar')
 
@@ -175,7 +171,7 @@
 protobuf {
     // Configure the protoc executable
     protoc {
-        artifact = 'com.google.protobuf:protoc:3.0.0-alpha-3'
+        artifact = 'com.google.protobuf:protoc:3.0.0'
 
         generateProtoTasks {
             all().each { task ->
diff --git a/gradle.properties b/gradle.properties
index a77f52a..7a51375 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -2,11 +2,11 @@
 android.useAndroidX = true
 android.enableJetifier = true
 
-ANDROID_X_VERSION=1.0.0-beta01
+ANDROID_X_VERSION=1+
 
-GRADLE_CLASS_PATH=com.android.tools.build:gradle:3.3.0
+GRADLE_CLASS_PATH=com.android.tools.build:gradle:3.5.1
 
-PROTOBUF_CLASS_PATH=com.google.protobuf:protobuf-gradle-plugin:0.8.6
+PROTOBUF_CLASS_PATH=com.google.protobuf:protobuf-gradle-plugin:0.8.8
 PROTOBUF_DEPENDENCY=com.google.protobuf.nano:protobuf-javanano:3.0.0-alpha-7
 
 BUILD_TOOLS_VERSION=28.0.3
diff --git a/iconloaderlib/build.gradle b/iconloaderlib/build.gradle
index 8a4d2b7..d7a62e1 100644
--- a/iconloaderlib/build.gradle
+++ b/iconloaderlib/build.gradle
@@ -3,7 +3,6 @@
 android {
     compileSdkVersion COMPILE_SDK
     buildToolsVersion BUILD_TOOLS_VERSION
-    publishNonDefault true
 
     defaultConfig {
         minSdkVersion 25
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/NoButtonQuickSwitchTouchController.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/NoButtonQuickSwitchTouchController.java
index 613386e..4e08df9 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/NoButtonQuickSwitchTouchController.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/NoButtonQuickSwitchTouchController.java
@@ -98,6 +98,7 @@
     private final float mYRange;
     private final MotionPauseDetector mMotionPauseDetector;
     private final float mMotionPauseMinDisplacement;
+    private final LauncherRecentsView mRecentsView;
 
     private boolean mNoIntercept;
     private LauncherState mStartState;
@@ -119,6 +120,7 @@
         mMotionPauseDetector = new MotionPauseDetector(mLauncher);
         mMotionPauseMinDisplacement = mLauncher.getResources().getDimension(
                 R.dimen.motion_pause_detector_min_displacement_from_app);
+        mRecentsView = mLauncher.getOverviewPanel();
     }
 
     @Override
@@ -208,6 +210,15 @@
         updateNonOverviewAnim(QUICK_SWITCH, nonOverviewBuilder, ANIM_ALL);
         mNonOverviewAnim.dispatchOnStart();
 
+        if (mRecentsView.getTaskViewCount() == 0) {
+            mRecentsView.setOnEmptyMessageUpdatedListener(isEmpty -> {
+                if (!isEmpty && mSwipeDetector.isDraggingState()) {
+                    // We have loaded tasks, update the animators to start at the correct scale etc.
+                    setupOverviewAnimators();
+                }
+            });
+        }
+
         setupOverviewAnimators();
     }
 
@@ -228,25 +239,25 @@
         LauncherState.ScaleAndTranslation toScaleAndTranslation = toState
                 .getOverviewScaleAndTranslation(mLauncher);
         // Update RecentView's translationX to have it start offscreen.
-        LauncherRecentsView recentsView = mLauncher.getOverviewPanel();
         float startScale = Utilities.mapRange(
                 SCALE_DOWN_INTERPOLATOR.getInterpolation(Y_ANIM_MIN_PROGRESS),
                 fromScaleAndTranslation.scale,
                 toScaleAndTranslation.scale);
-        fromScaleAndTranslation.translationX = recentsView.getOffscreenTranslationX(startScale);
+        fromScaleAndTranslation.translationX = mRecentsView.getOffscreenTranslationX(startScale);
 
         // Set RecentView's initial properties.
-        recentsView.setScaleX(fromScaleAndTranslation.scale);
-        recentsView.setScaleY(fromScaleAndTranslation.scale);
-        recentsView.setTranslationX(fromScaleAndTranslation.translationX);
-        recentsView.setTranslationY(fromScaleAndTranslation.translationY);
-        recentsView.setContentAlpha(1);
+        mRecentsView.setScaleX(fromScaleAndTranslation.scale);
+        mRecentsView.setScaleY(fromScaleAndTranslation.scale);
+        mRecentsView.setTranslationX(fromScaleAndTranslation.translationX);
+        mRecentsView.setTranslationY(fromScaleAndTranslation.translationY);
+        mRecentsView.setContentAlpha(1);
+        mRecentsView.setFullscreenProgress(fromState.getOverviewFullscreenProgress());
 
         // As we drag right, animate the following properties:
         //   - RecentsView translationX
         //   - OverviewScrim
         AnimatorSet xOverviewAnim = new AnimatorSet();
-        xOverviewAnim.play(ObjectAnimator.ofFloat(recentsView, View.TRANSLATION_X,
+        xOverviewAnim.play(ObjectAnimator.ofFloat(mRecentsView, View.TRANSLATION_X,
                 toScaleAndTranslation.translationX));
         xOverviewAnim.play(ObjectAnimator.ofFloat(
                 mLauncher.getDragLayer().getOverviewScrim(), OverviewScrim.SCRIM_PROGRESS,
@@ -261,11 +272,11 @@
         //   - RecentsView scale
         //   - RecentsView fullscreenProgress
         AnimatorSet yAnimation = new AnimatorSet();
-        Animator translateYAnim = ObjectAnimator.ofFloat(recentsView, View.TRANSLATION_Y,
+        Animator translateYAnim = ObjectAnimator.ofFloat(mRecentsView, View.TRANSLATION_Y,
                 toScaleAndTranslation.translationY);
-        Animator scaleAnim = ObjectAnimator.ofFloat(recentsView, SCALE_PROPERTY,
+        Animator scaleAnim = ObjectAnimator.ofFloat(mRecentsView, SCALE_PROPERTY,
                 toScaleAndTranslation.scale);
-        Animator fullscreenProgressAnim = ObjectAnimator.ofFloat(recentsView, FULLSCREEN_PROGRESS,
+        Animator fullscreenProgressAnim = ObjectAnimator.ofFloat(mRecentsView, FULLSCREEN_PROGRESS,
                 fromState.getOverviewFullscreenProgress(), toState.getOverviewFullscreenProgress());
         scaleAnim.setInterpolator(SCALE_DOWN_INTERPOLATOR);
         fullscreenProgressAnim.setInterpolator(SCALE_DOWN_INTERPOLATOR);
@@ -466,5 +477,6 @@
         mYOverviewAnim = null;
         mIsHomeScreenVisible = true;
         mSwipeDetector.finishedScrolling();
+        mRecentsView.setOnEmptyMessageUpdatedListener(null);
     }
 }
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/fallback/FallbackNavBarTouchController.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/fallback/FallbackNavBarTouchController.java
new file mode 100644
index 0000000..6f919c1
--- /dev/null
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/fallback/FallbackNavBarTouchController.java
@@ -0,0 +1,78 @@
+/*
+ * 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.fallback;
+
+import android.view.MotionEvent;
+
+import androidx.annotation.Nullable;
+
+import com.android.launcher3.Utilities;
+import com.android.launcher3.util.DefaultDisplay;
+import com.android.launcher3.util.TouchController;
+import com.android.quickstep.RecentsActivity;
+import com.android.quickstep.SysUINavigationMode;
+import com.android.quickstep.util.NavBarPosition;
+import com.android.quickstep.util.TriggerSwipeUpTouchTracker;
+
+/**
+ * In 0-button mode, intercepts swipe up from the nav bar on FallbackRecentsView to go home.
+ */
+public class FallbackNavBarTouchController implements TouchController {
+
+    private final RecentsActivity mActivity;
+    @Nullable
+    private final TriggerSwipeUpTouchTracker mTriggerSwipeUpTracker;
+
+    public FallbackNavBarTouchController(RecentsActivity activity) {
+        mActivity = activity;
+        SysUINavigationMode.Mode sysUINavigationMode = SysUINavigationMode.getMode(mActivity);
+        if (sysUINavigationMode == SysUINavigationMode.Mode.NO_BUTTON) {
+            NavBarPosition navBarPosition = new NavBarPosition(sysUINavigationMode,
+                    DefaultDisplay.INSTANCE.get(mActivity).getInfo());
+            mTriggerSwipeUpTracker = new TriggerSwipeUpTouchTracker(mActivity,
+                    true /* disableHorizontalSwipe */, navBarPosition,
+                    null /* onInterceptTouch */, this::onSwipeUp);
+        } else {
+            mTriggerSwipeUpTracker = null;
+        }
+    }
+
+    @Override
+    public boolean onControllerInterceptTouchEvent(MotionEvent ev) {
+        boolean cameFromNavBar = (ev.getEdgeFlags() & Utilities.EDGE_NAV_BAR) != 0;
+        if (cameFromNavBar && mTriggerSwipeUpTracker != null) {
+            if (ev.getAction() == MotionEvent.ACTION_DOWN) {
+                mTriggerSwipeUpTracker.init();
+            }
+            onControllerTouchEvent(ev);
+            return mTriggerSwipeUpTracker.interceptedTouch();
+        }
+        return false;
+    }
+
+    @Override
+    public boolean onControllerTouchEvent(MotionEvent ev) {
+        if (mTriggerSwipeUpTracker != null) {
+            mTriggerSwipeUpTracker.onMotionEvent(ev);
+            return true;
+        }
+        return false;
+    }
+
+    private void onSwipeUp(boolean wasFling) {
+        mActivity.<FallbackRecentsView>getOverviewPanel().startHome();
+    }
+}
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/fallback/RecentsRootView.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/fallback/RecentsRootView.java
index 1820729..de5fd7c 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/fallback/RecentsRootView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/fallback/RecentsRootView.java
@@ -48,7 +48,10 @@
     }
 
     public void setup() {
-        mControllers = new TouchController[] { new RecentsTaskController(mActivity) };
+        mControllers = new TouchController[] {
+                new RecentsTaskController(mActivity),
+                new FallbackNavBarTouchController(mActivity),
+        };
     }
 
     @Override
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OverviewWithoutFocusInputConsumer.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OverviewWithoutFocusInputConsumer.java
index 875ec29..ca15ca1 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OverviewWithoutFocusInputConsumer.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OverviewWithoutFocusInputConsumer.java
@@ -15,23 +15,12 @@
  */
 package com.android.quickstep.inputconsumers;
 
-import static android.view.MotionEvent.ACTION_CANCEL;
-import static android.view.MotionEvent.ACTION_DOWN;
-import static android.view.MotionEvent.ACTION_MOVE;
-import static android.view.MotionEvent.ACTION_UP;
-
-import static com.android.launcher3.Utilities.squaredHypot;
-
 import android.content.Context;
 import android.content.Intent;
-import android.graphics.PointF;
 import android.view.MotionEvent;
-import android.view.VelocityTracker;
-import android.view.ViewConfiguration;
 
 import com.android.launcher3.BaseActivity;
 import com.android.launcher3.BaseDraggingActivity;
-import com.android.launcher3.Utilities;
 import com.android.launcher3.logging.StatsLogUtils;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Direction;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Touch;
@@ -39,31 +28,22 @@
 import com.android.quickstep.InputConsumer;
 import com.android.quickstep.RecentsAnimationDeviceState;
 import com.android.quickstep.util.ActiveGestureLog;
+import com.android.quickstep.util.TriggerSwipeUpTouchTracker;
 import com.android.systemui.shared.system.InputMonitorCompat;
 
 public class OverviewWithoutFocusInputConsumer implements InputConsumer {
 
     private final Context mContext;
-    private final RecentsAnimationDeviceState mDeviceState;
-    private final GestureState mGestureState;
     private final InputMonitorCompat mInputMonitor;
-    private final boolean mDisableHorizontalSwipe;
-    private final PointF mDownPos = new PointF();
-    private final float mSquaredTouchSlop;
-
-    private boolean mInterceptedTouch;
-    private VelocityTracker mVelocityTracker;
+    private final TriggerSwipeUpTouchTracker mTriggerSwipeUpTracker;
 
     public OverviewWithoutFocusInputConsumer(Context context,
             RecentsAnimationDeviceState deviceState, GestureState gestureState,
             InputMonitorCompat inputMonitor, boolean disableHorizontalSwipe) {
         mContext = context;
-        mDeviceState = deviceState;
-        mGestureState = gestureState;
         mInputMonitor = inputMonitor;
-        mDisableHorizontalSwipe = disableHorizontalSwipe;
-        mSquaredTouchSlop = Utilities.squaredTouchSlop(context);
-        mVelocityTracker = VelocityTracker.obtain();
+        mTriggerSwipeUpTracker = new TriggerSwipeUpTouchTracker(context, disableHorizontalSwipe,
+                deviceState.getNavBarPosition(), this::onInterceptTouch, this::onSwipeUp);
     }
 
     @Override
@@ -73,97 +53,31 @@
 
     @Override
     public boolean allowInterceptByParent() {
-        return !mInterceptedTouch;
-    }
-
-    private void endTouchTracking() {
-        if (mVelocityTracker != null) {
-            mVelocityTracker.recycle();
-            mVelocityTracker = null;
-        }
+        return !mTriggerSwipeUpTracker.interceptedTouch();
     }
 
     @Override
     public void onMotionEvent(MotionEvent ev) {
-        if (mVelocityTracker == null) {
-            return;
-        }
+        mTriggerSwipeUpTracker.onMotionEvent(ev);
+    }
 
-        mVelocityTracker.addMovement(ev);
-        switch (ev.getActionMasked()) {
-            case ACTION_DOWN: {
-                mDownPos.set(ev.getX(), ev.getY());
-                break;
-            }
-            case ACTION_MOVE: {
-                if (!mInterceptedTouch) {
-                    float displacementX = ev.getX() - mDownPos.x;
-                    float displacementY = ev.getY() - mDownPos.y;
-                    if (squaredHypot(displacementX, displacementY) >= mSquaredTouchSlop) {
-                        if (mDisableHorizontalSwipe
-                                && Math.abs(displacementX) > Math.abs(displacementY)) {
-                            // Horizontal gesture is not allowed in this region
-                            endTouchTracking();
-                            break;
-                        }
-
-                        mInterceptedTouch = true;
-
-                        if (mInputMonitor != null) {
-                            mInputMonitor.pilferPointers();
-                        }
-                    }
-                }
-                break;
-            }
-
-            case ACTION_CANCEL:
-                endTouchTracking();
-                break;
-
-            case ACTION_UP: {
-                finishTouchTracking(ev);
-                endTouchTracking();
-                break;
-            }
+    private void onInterceptTouch() {
+        if (mInputMonitor != null) {
+            mInputMonitor.pilferPointers();
         }
     }
 
-    private void finishTouchTracking(MotionEvent ev) {
-        mVelocityTracker.computeCurrentVelocity(100);
-        float velocityX = mVelocityTracker.getXVelocity();
-        float velocityY = mVelocityTracker.getYVelocity();
-        float velocity = mDeviceState.getNavBarPosition().isRightEdge()
-                ? -velocityX
-                : mDeviceState.getNavBarPosition().isLeftEdge()
-                        ? velocityX
-                        : -velocityY;
-
-        final boolean triggerQuickstep;
-        int touch = Touch.FLING;
-        if (Math.abs(velocity) >= ViewConfiguration.get(mContext).getScaledMinimumFlingVelocity()) {
-            triggerQuickstep = velocity > 0;
-        } else {
-            float displacementX = mDisableHorizontalSwipe ? 0 : (ev.getX() - mDownPos.x);
-            float displacementY = ev.getY() - mDownPos.y;
-            triggerQuickstep = squaredHypot(displacementX, displacementY) >= mSquaredTouchSlop;
-            touch = Touch.SWIPE;
-        }
-
-        if (triggerQuickstep) {
-            mContext.startActivity(new Intent(Intent.ACTION_MAIN)
-                    .addCategory(Intent.CATEGORY_HOME)
-                    .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
-            ActiveGestureLog.INSTANCE.addLog("startQuickstep");
-            BaseActivity activity = BaseDraggingActivity.fromContext(mContext);
-            int pageIndex = -1; // This number doesn't reflect workspace page index.
-                                // It only indicates that launcher client screen was shown.
-            int containerType = StatsLogUtils.getContainerTypeFromState(activity.getCurrentState());
-            activity.getUserEventDispatcher().logActionOnContainer(
-                    touch, Direction.UP, containerType, pageIndex);
-            activity.getUserEventDispatcher().setPreviousHomeGesture(true);
-        } else {
-            // ignore
-        }
+    private void onSwipeUp(boolean wasFling) {
+        mContext.startActivity(new Intent(Intent.ACTION_MAIN)
+                .addCategory(Intent.CATEGORY_HOME)
+                .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
+        ActiveGestureLog.INSTANCE.addLog("startQuickstep");
+        BaseActivity activity = BaseDraggingActivity.fromContext(mContext);
+        int pageIndex = -1; // This number doesn't reflect workspace page index.
+                            // It only indicates that launcher client screen was shown.
+        int containerType = StatsLogUtils.getContainerTypeFromState(activity.getCurrentState());
+        activity.getUserEventDispatcher().logActionOnContainer(
+                wasFling ? Touch.FLING : Touch.SWIPE, Direction.UP, containerType, pageIndex);
+        activity.getUserEventDispatcher().setPreviousHomeGesture(true);
     }
 }
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/TriggerSwipeUpTouchTracker.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/TriggerSwipeUpTouchTracker.java
new file mode 100644
index 0000000..c71258b
--- /dev/null
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/TriggerSwipeUpTouchTracker.java
@@ -0,0 +1,167 @@
+/*
+ * 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.util;
+
+import static android.view.MotionEvent.ACTION_CANCEL;
+import static android.view.MotionEvent.ACTION_DOWN;
+import static android.view.MotionEvent.ACTION_MOVE;
+import static android.view.MotionEvent.ACTION_UP;
+
+import static com.android.launcher3.Utilities.squaredHypot;
+
+import android.content.Context;
+import android.graphics.PointF;
+import android.view.MotionEvent;
+import android.view.VelocityTracker;
+import android.view.ViewConfiguration;
+
+import com.android.launcher3.Utilities;
+
+/**
+ * Tracks motion events to determine whether a gesture on the nav bar is a swipe up.
+ */
+public class TriggerSwipeUpTouchTracker {
+
+    private final PointF mDownPos = new PointF();
+    private final float mSquaredTouchSlop;
+    private final float mMinFlingVelocity;
+    private final boolean mDisableHorizontalSwipe;
+    private final NavBarPosition mNavBarPosition;
+    private final Runnable mOnInterceptTouch;
+    private final OnSwipeUpListener mOnSwipeUp;
+
+    private boolean mInterceptedTouch;
+    private VelocityTracker mVelocityTracker;
+
+    public TriggerSwipeUpTouchTracker(Context context, boolean disableHorizontalSwipe,
+            NavBarPosition navBarPosition, Runnable onInterceptTouch,
+            OnSwipeUpListener onSwipeUp) {
+        mSquaredTouchSlop = Utilities.squaredTouchSlop(context);
+        mMinFlingVelocity = ViewConfiguration.get(context).getScaledMinimumFlingVelocity();
+        mNavBarPosition = navBarPosition;
+        mDisableHorizontalSwipe = disableHorizontalSwipe;
+        mOnInterceptTouch = onInterceptTouch;
+        mOnSwipeUp = onSwipeUp;
+
+        init();
+    }
+
+    /**
+     * Reset some initial values to prepare for the next gesture.
+     */
+    public void init() {
+        mInterceptedTouch = false;
+        mVelocityTracker = VelocityTracker.obtain();
+    }
+
+    /**
+     * @return Whether we have passed the touch slop and are still tracking the gesture.
+     */
+    public boolean interceptedTouch() {
+        return mInterceptedTouch;
+    }
+
+    /**
+     * Track motion events to determine whether an atomic swipe up has occurred.
+     */
+    public void onMotionEvent(MotionEvent ev) {
+        if (mVelocityTracker == null) {
+            return;
+        }
+
+        mVelocityTracker.addMovement(ev);
+        switch (ev.getActionMasked()) {
+            case ACTION_DOWN: {
+                mDownPos.set(ev.getX(), ev.getY());
+                break;
+            }
+            case ACTION_MOVE: {
+                if (!mInterceptedTouch) {
+                    float displacementX = ev.getX() - mDownPos.x;
+                    float displacementY = ev.getY() - mDownPos.y;
+                    if (squaredHypot(displacementX, displacementY) >= mSquaredTouchSlop) {
+                        if (mDisableHorizontalSwipe
+                                && Math.abs(displacementX) > Math.abs(displacementY)) {
+                            // Horizontal gesture is not allowed in this region
+                            endTouchTracking();
+                            break;
+                        }
+
+                        mInterceptedTouch = true;
+
+                        if (mOnInterceptTouch != null) {
+                            mOnInterceptTouch.run();
+                        }
+                    }
+                }
+                break;
+            }
+
+            case ACTION_CANCEL:
+                endTouchTracking();
+                break;
+
+            case ACTION_UP: {
+                onGestureEnd(ev);
+                endTouchTracking();
+                break;
+            }
+        }
+    }
+
+    private void endTouchTracking() {
+        if (mVelocityTracker != null) {
+            mVelocityTracker.recycle();
+            mVelocityTracker = null;
+        }
+    }
+
+    private void onGestureEnd(MotionEvent ev) {
+        mVelocityTracker.computeCurrentVelocity(1000);
+        float velocityX = mVelocityTracker.getXVelocity();
+        float velocityY = mVelocityTracker.getYVelocity();
+        float velocity = mNavBarPosition.isRightEdge()
+                ? -velocityX
+                : mNavBarPosition.isLeftEdge()
+                        ? velocityX
+                        : -velocityY;
+
+        final boolean wasFling = Math.abs(velocity) >= mMinFlingVelocity;
+        final boolean isSwipeUp;
+        if (wasFling) {
+            isSwipeUp = velocity > 0;
+        } else {
+            float displacementX = mDisableHorizontalSwipe ? 0 : (ev.getX() - mDownPos.x);
+            float displacementY = ev.getY() - mDownPos.y;
+            isSwipeUp = squaredHypot(displacementX, displacementY) >= mSquaredTouchSlop;
+        }
+
+        if (isSwipeUp && mOnSwipeUp != null) {
+            mOnSwipeUp.onSwipeUp(wasFling);
+        }
+    }
+
+    /**
+     * Callback when the gesture ends and was determined to be a swipe from the nav bar.
+     */
+    public interface OnSwipeUpListener {
+        /**
+         * Called on touch up if a swipe up was detected.
+         * @param wasFling Whether the swipe was a fling, or just passed touch slop at low velocity.
+         */
+        void onSwipeUp(boolean wasFling);
+    }
+}
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 c836791..cb20ed0 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
@@ -309,6 +309,7 @@
     private final Point mLastMeasureSize = new Point();
     private final int mEmptyMessagePadding;
     private boolean mShowEmptyMessage;
+    private OnEmptyMessageUpdatedListener mOnEmptyMessageUpdatedListener;
     private Layout mEmptyTextLayout;
     private boolean mLiveTileOverlayAttached;
 
@@ -1456,6 +1457,10 @@
         return null;
     }
 
+    public void setOnEmptyMessageUpdatedListener(OnEmptyMessageUpdatedListener listener) {
+        mOnEmptyMessageUpdatedListener = listener;
+    }
+
     public void updateEmptyMessage() {
         boolean isEmpty = getTaskViewCount() == 0;
         boolean hasSizeChanged = mLastMeasureSize.x != getWidth()
@@ -1467,6 +1472,10 @@
         mShowEmptyMessage = isEmpty;
         updateEmptyStateUi(hasSizeChanged);
         invalidate();
+
+        if (mOnEmptyMessageUpdatedListener != null) {
+            mOnEmptyMessageUpdatedListener.onEmptyMessageUpdated(mShowEmptyMessage);
+        }
     }
 
     @Override
@@ -1927,4 +1936,15 @@
         return !(view instanceof TaskView) && !(view instanceof ClearAllButton)
                 && index <= mTaskViewStartIndex;
     }
+
+    /**
+     * Used to register callbacks for when our empty message state changes.
+     *
+     * @see #setOnEmptyMessageUpdatedListener(OnEmptyMessageUpdatedListener)
+     * @see #updateEmptyMessage()
+     */
+    public interface OnEmptyMessageUpdatedListener {
+        /** @param isEmpty Whether RecentsView is empty (i.e. has no children) */
+        void onEmptyMessageUpdated(boolean isEmpty);
+    }
 }
diff --git a/quickstep/src/com/android/launcher3/QuickstepAppTransitionManagerImpl.java b/quickstep/src/com/android/launcher3/QuickstepAppTransitionManagerImpl.java
index d4db05a..1e01709 100644
--- a/quickstep/src/com/android/launcher3/QuickstepAppTransitionManagerImpl.java
+++ b/quickstep/src/com/android/launcher3/QuickstepAppTransitionManagerImpl.java
@@ -69,9 +69,9 @@
 import com.android.launcher3.util.MultiValueAlpha;
 import com.android.launcher3.util.MultiValueAlpha.AlphaProperty;
 import com.android.launcher3.views.FloatingIconView;
+import com.android.quickstep.RemoteAnimationTargets;
 import com.android.quickstep.util.MultiValueUpdateListener;
 import com.android.quickstep.util.RemoteAnimationProvider;
-import com.android.quickstep.RemoteAnimationTargets;
 import com.android.systemui.shared.system.ActivityCompat;
 import com.android.systemui.shared.system.ActivityOptionsCompat;
 import com.android.systemui.shared.system.QuickStepContract;
@@ -83,6 +83,8 @@
 import com.android.systemui.shared.system.SyncRtSurfaceTransactionApplierCompat.SurfaceParams;
 import com.android.systemui.shared.system.WindowManagerWrapper;
 
+import java.lang.ref.WeakReference;
+
 /**
  * {@link LauncherAppTransitionManager} with Quickstep-specific app transitions for launching from
  * home and/or all-apps.
@@ -149,6 +151,7 @@
     private DeviceProfile mDeviceProfile;
 
     private RemoteAnimationProvider mRemoteAnimationProvider;
+    private WrappedAnimationRunnerImpl mWallpaperOpenRunner;
 
     private final AnimatorListenerAdapter mForceInvisibleListener = new AnimatorListenerAdapter() {
         @Override
@@ -176,7 +179,6 @@
         mClosingWindowTransY = res.getDimensionPixelSize(R.dimen.closing_window_trans_y);
 
         mLauncher.addOnDeviceProfileChangeListener(this);
-        registerRemoteAnimations();
     }
 
     @Override
@@ -598,18 +600,36 @@
     /**
      * Registers remote animations used when closing apps to home screen.
      */
-    private void registerRemoteAnimations() {
-        // Unregister this
+    @Override
+    public void registerRemoteAnimations() {
         if (hasControlRemoteAppTransitionPermission()) {
+            mWallpaperOpenRunner = createWallpaperOpenRunner(false /* fromUnlock */);
+
             RemoteAnimationDefinitionCompat definition = new RemoteAnimationDefinitionCompat();
             definition.addRemoteAnimation(WindowManagerWrapper.TRANSIT_WALLPAPER_OPEN,
                     WindowManagerWrapper.ACTIVITY_TYPE_STANDARD,
-                    new RemoteAnimationAdapterCompat(getWallpaperOpenRunner(false /* fromUnlock */),
+                    new RemoteAnimationAdapterCompat(
+                            new WrappedLauncherAnimationRunner<>(mWallpaperOpenRunner,
+                                    false /* startAtFrontOfQueue */),
                             CLOSING_TRANSITION_DURATION_MS, 0 /* statusBarTransitionDelay */));
             new ActivityCompat(mLauncher).registerRemoteAnimations(definition);
         }
     }
 
+    /**
+     * Unregisters all remote animations.
+     */
+    @Override
+    public void unregisterRemoteAnimations() {
+        if (hasControlRemoteAppTransitionPermission()) {
+            new ActivityCompat(mLauncher).unregisterRemoteAnimations();
+
+            // Also clear strong references to the runners registered with the remote animation
+            // definition so we don't have to wait for the system gc
+            mWallpaperOpenRunner = null;
+        }
+    }
+
     private boolean launcherIsATargetWithMode(RemoteAnimationTargetCompat[] targets, int mode) {
         return taskIsATargetWithMode(targets, mLauncher.getTaskId(), mode);
     }
@@ -618,9 +638,8 @@
      * @return Runner that plays when user goes to Launcher
      *         ie. pressing home, swiping up from nav bar.
      */
-    RemoteAnimationRunnerCompat getWallpaperOpenRunner(boolean fromUnlock) {
-        return new WallpaperOpenLauncherAnimationRunner(mHandler, false /* startAtFrontOfQueue */,
-                fromUnlock);
+    WrappedAnimationRunnerImpl createWallpaperOpenRunner(boolean fromUnlock) {
+        return new WallpaperOpenLauncherAnimationRunner(mHandler, fromUnlock);
     }
 
     /**
@@ -701,7 +720,8 @@
     }
 
     /**
-     * Creates an animator that modifies Launcher as a result from {@link #getWallpaperOpenRunner}.
+     * Creates an animator that modifies Launcher as a result from 
+     * {@link #createWallpaperOpenRunner}.
      */
     private void createLauncherResumeAnimation(AnimatorSet anim) {
         if (mLauncher.isInState(LauncherState.ALL_APPS)) {
@@ -761,18 +781,70 @@
     }
 
     /**
+     * Used with WrappedLauncherAnimationRunner as an interface for the runner to call back to the
+     * implementation.
+     */
+    protected interface WrappedAnimationRunnerImpl {
+        Handler getHandler();
+        void onCreateAnimation(RemoteAnimationTargetCompat[] appTargets,
+                RemoteAnimationTargetCompat[] wallpaperTargets,
+                LauncherAnimationRunner.AnimationResult result);
+    }
+
+    /**
+     * This class is needed to wrap any animation runner that is a part of the
+     * RemoteAnimationDefinition:
+     * - Launcher creates a new instance of the LauncherAppTransitionManagerImpl whenever it is
+     *   created, which in turn registers a new definition
+     * - When the definition is registered, window manager retains a strong binder reference to the
+     *   runner passed in
+     * - If the Launcher activity is recreated, the new definition registered will replace the old
+     *   reference in the system's activity record, but until the system server is GC'd, the binder
+     *   reference will still exist, which references the runner in the Launcher process, which
+     *   references the (old) Launcher activity through this class
+     *
+     * Instead we make the runner provided to the definition static only holding a weak reference to
+     * the runner implementation.  When this animation manager is destroyed, we remove the Launcher
+     * reference to the runner, leaving only the weak ref from the runner.
+     */
+    protected static class WrappedLauncherAnimationRunner<R extends WrappedAnimationRunnerImpl>
+            extends LauncherAnimationRunner {
+        private WeakReference<R> mImpl;
+
+        public WrappedLauncherAnimationRunner(R animationRunnerImpl, boolean startAtFrontOfQueue) {
+            super(animationRunnerImpl.getHandler(), startAtFrontOfQueue);
+            mImpl = new WeakReference<>(animationRunnerImpl);
+        }
+
+        @Override
+        public void onCreateAnimation(RemoteAnimationTargetCompat[] appTargets,
+                RemoteAnimationTargetCompat[] wallpaperTargets, AnimationResult result) {
+            R animationRunnerImpl = mImpl.get();
+            if (animationRunnerImpl != null) {
+                animationRunnerImpl.onCreateAnimation(appTargets, wallpaperTargets, result);
+            }
+        }
+    }
+
+    /**
      * Remote animation runner for animation from the app to Launcher, including recents.
      */
-    class WallpaperOpenLauncherAnimationRunner extends LauncherAnimationRunner {
+    protected class WallpaperOpenLauncherAnimationRunner implements WrappedAnimationRunnerImpl {
+
+        private final Handler mHandler;
         private final boolean mFromUnlock;
 
-        public WallpaperOpenLauncherAnimationRunner(Handler handler, boolean startAtFrontOfQueue,
-                boolean fromUnlock) {
-            super(handler, startAtFrontOfQueue);
+        public WallpaperOpenLauncherAnimationRunner(Handler handler, boolean fromUnlock) {
+            mHandler = handler;
             mFromUnlock = fromUnlock;
         }
 
         @Override
+        public Handler getHandler() {
+            return mHandler;
+        }
+
+        @Override
         public void onCreateAnimation(RemoteAnimationTargetCompat[] appTargets,
                 RemoteAnimationTargetCompat[] wallpaperTargets,
                 LauncherAnimationRunner.AnimationResult result) {
diff --git a/quickstep/tests/src/com/android/quickstep/TaplTestsQuickstep.java b/quickstep/tests/src/com/android/quickstep/TaplTestsQuickstep.java
index 428e647..71d77fc 100644
--- a/quickstep/tests/src/com/android/quickstep/TaplTestsQuickstep.java
+++ b/quickstep/tests/src/com/android/quickstep/TaplTestsQuickstep.java
@@ -43,6 +43,7 @@
 import com.android.quickstep.NavigationModeSwitchRule.NavigationModeSwitch;
 import com.android.quickstep.views.RecentsView;
 
+import org.junit.After;
 import org.junit.Before;
 import org.junit.Ignore;
 import org.junit.Test;
@@ -51,10 +52,18 @@
 @LargeTest
 @RunWith(AndroidJUnit4.class)
 public class TaplTestsQuickstep extends AbstractQuickStepTest {
+    private int mLauncherPid;
+
     @Before
     public void setUp() throws Exception {
         super.setUp();
         TaplTestsLauncher3.initialize(this);
+        mLauncherPid = mLauncher.getPid();
+    }
+
+    @After
+    public void teardown() {
+        assertEquals("Launcher crashed, pid mismatch:", mLauncherPid, mLauncher.getPid());
     }
 
     private void startTestApps() throws Exception {
@@ -100,6 +109,7 @@
     @PortraitLandscape
     public void testOverview() throws Exception {
         startTestApps();
+        // mLauncher.pressHome() also tests an important case of pressing home while in background.
         Overview overview = mLauncher.pressHome().switchToOverview();
         assertTrue("Launcher internal state didn't switch to Overview",
                 isInState(LauncherState.OVERVIEW));
diff --git a/robolectric_tests/src/com/android/launcher3/model/BackupRestoreTest.java b/robolectric_tests/src/com/android/launcher3/model/BackupRestoreTest.java
new file mode 100644
index 0000000..6223760
--- /dev/null
+++ b/robolectric_tests/src/com/android/launcher3/model/BackupRestoreTest.java
@@ -0,0 +1,57 @@
+/*
+ * 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.model;
+
+import static com.android.launcher3.LauncherSettings.Favorites.BACKUP_TABLE_NAME;
+import static com.android.launcher3.provider.LauncherDbUtils.tableExists;
+
+import static org.junit.Assert.assertTrue;
+
+import android.database.sqlite.SQLiteDatabase;
+
+import com.android.launcher3.provider.RestoreDbTask;
+import com.android.launcher3.util.LauncherModelHelper;
+import com.android.launcher3.util.LauncherRoboTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.LooperMode;
+
+/**
+ * Tests to verify backup and restore flow.
+ */
+@RunWith(LauncherRoboTestRunner.class)
+@LooperMode(LooperMode.Mode.PAUSED)
+public class BackupRestoreTest {
+
+    private LauncherModelHelper mModelHelper;
+    private SQLiteDatabase mDb;
+
+    @Before
+    public void setUp() {
+        mModelHelper = new LauncherModelHelper();
+        RestoreDbTask.setPending(RuntimeEnvironment.application, true);
+        mDb = mModelHelper.provider.getDb();
+    }
+
+    @Test
+    public void testOnCreateDbIfNotExists_CreatesBackup() {
+        assertTrue(tableExists(mDb, BACKUP_TABLE_NAME));
+    }
+}
diff --git a/robolectric_tests/src/com/android/launcher3/util/LauncherModelHelper.java b/robolectric_tests/src/com/android/launcher3/util/LauncherModelHelper.java
index 655055c..e8b7157 100644
--- a/robolectric_tests/src/com/android/launcher3/util/LauncherModelHelper.java
+++ b/robolectric_tests/src/com/android/launcher3/util/LauncherModelHelper.java
@@ -28,6 +28,7 @@
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.pm.PackageManager.NameNotFoundException;
+import android.database.sqlite.SQLiteDatabase;
 import android.net.Uri;
 import android.provider.Settings;
 
@@ -276,6 +277,8 @@
         Context context = RuntimeEnvironment.application;
         LauncherSettings.Settings.call(context.getContentResolver(),
                 LauncherSettings.Settings.METHOD_CREATE_EMPTY_DB);
+        LauncherSettings.Settings.call(context.getContentResolver(),
+                LauncherSettings.Settings.METHOD_CLEAR_EMPTY_DB_FLAG);
         int[][][] ids = new int[typeArray.length][][];
 
         for (int i = 0; i < typeArray.length; i++) {
@@ -312,7 +315,6 @@
         idp.numRows = idp.numColumns = idp.numHotseatIcons = DEFAULT_GRID_SIZE;
         idp.iconBitmapSize = DEFAULT_BITMAP_SIZE;
 
-        provider.setAllowLoadDefaultFavorites(true);
         Settings.Secure.putString(context.getContentResolver(),
                 "launcher3.layout.provider", TEST_PROVIDER_AUTHORITY);
 
@@ -340,4 +342,20 @@
         filter.addCategory(Intent.CATEGORY_DEFAULT);
         spm.addIntentFilterForActivity(cn, filter);
     }
+
+    /**
+     * An extension of LauncherProvider backed up by in-memory database.
+     */
+    public static class TestLauncherProvider extends LauncherProvider {
+
+        @Override
+        public boolean onCreate() {
+            return true;
+        }
+
+        public SQLiteDatabase getDb() {
+            createDbIfNotExists();
+            return mOpenHelper.getWritableDatabase();
+        }
+    }
 }
diff --git a/robolectric_tests/src/com/android/launcher3/util/TestLauncherProvider.java b/robolectric_tests/src/com/android/launcher3/util/TestLauncherProvider.java
deleted file mode 100644
index 7e873e8..0000000
--- a/robolectric_tests/src/com/android/launcher3/util/TestLauncherProvider.java
+++ /dev/null
@@ -1,61 +0,0 @@
-package com.android.launcher3.util;
-
-import android.content.Context;
-import android.database.sqlite.SQLiteDatabase;
-
-import com.android.launcher3.LauncherProvider;
-
-/**
- * An extension of LauncherProvider backed up by in-memory database.
- */
-public class TestLauncherProvider extends LauncherProvider {
-
-    private boolean mAllowLoadDefaultFavorites;
-
-    @Override
-    public boolean onCreate() {
-        return true;
-    }
-
-    @Override
-    protected synchronized void createDbIfNotExists() {
-        if (mOpenHelper == null) {
-            mOpenHelper = new MyDatabaseHelper(getContext(), mAllowLoadDefaultFavorites);
-        }
-    }
-
-    public void setAllowLoadDefaultFavorites(boolean allowLoadDefaultFavorites) {
-        mAllowLoadDefaultFavorites = allowLoadDefaultFavorites;
-    }
-
-    public SQLiteDatabase getDb() {
-        createDbIfNotExists();
-        return mOpenHelper.getWritableDatabase();
-    }
-
-    private static class MyDatabaseHelper extends DatabaseHelper {
-
-        private final boolean mAllowLoadDefaultFavorites;
-
-        MyDatabaseHelper(Context context, boolean allowLoadDefaultFavorites) {
-            super(context, null);
-            mAllowLoadDefaultFavorites = allowLoadDefaultFavorites;
-            initIds();
-        }
-
-        @Override
-        public long getDefaultUserSerial() {
-            return 0;
-        }
-
-        @Override
-        protected void onEmptyDbCreated() {
-            if (mAllowLoadDefaultFavorites) {
-                super.onEmptyDbCreated();
-            }
-        }
-
-        @Override
-        protected void handleOneTimeDataUpgrade(SQLiteDatabase db) { }
-    }
-}
diff --git a/settings.gradle b/settings.gradle
index b52bd4f..ce13bfb 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1,2 +1,5 @@
 include ':IconLoader'
 project(':IconLoader').projectDir = new File(rootDir, 'iconloaderlib')
+
+include ':SharedLibWrapper'
+project(':SharedLibWrapper').projectDir = new File(rootDir, 'SharedLibWrapper')
diff --git a/src/com/android/launcher3/BaseActivity.java b/src/com/android/launcher3/BaseActivity.java
index ea63fa7..3ca4f59 100644
--- a/src/com/android/launcher3/BaseActivity.java
+++ b/src/com/android/launcher3/BaseActivity.java
@@ -286,7 +286,7 @@
     /**
      * Used to set the override visibility state, used only to handle the transition home with the
      * recents animation.
-     * @see QuickstepAppTransitionManagerImpl#getWallpaperOpenRunner
+     * @see QuickstepAppTransitionManagerImpl#createWallpaperOpenRunner
      */
     public void addForceInvisibleFlag(@InvisibilityFlags int flag) {
         mForceInvisible |= flag;
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index f5fafbf..8066d38 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -373,6 +373,7 @@
         mPopupDataProvider = new PopupDataProvider(this);
 
         mAppTransitionManager = LauncherAppTransitionManager.newInstance(this);
+        mAppTransitionManager.registerRemoteAnimations();
 
         boolean internalStateHandled = ACTIVITY_TRACKER.handleCreate(this);
         if (internalStateHandled) {
@@ -1545,6 +1546,7 @@
         LauncherAppState.getIDP(this).removeOnChangeListener(this);
 
         mOverlayManager.onActivityDestroyed(this);
+        mAppTransitionManager.unregisterRemoteAnimations();
     }
 
     public LauncherAccessibilityDelegate getAccessibilityDelegate() {
diff --git a/src/com/android/launcher3/LauncherAppTransitionManager.java b/src/com/android/launcher3/LauncherAppTransitionManager.java
index c55c120..9148c2f 100644
--- a/src/com/android/launcher3/LauncherAppTransitionManager.java
+++ b/src/com/android/launcher3/LauncherAppTransitionManager.java
@@ -67,4 +67,18 @@
     public Animator createStateElementAnimation(int index, float... values) {
         throw new RuntimeException("Unknown gesture animation " + index);
     }
+
+    /**
+     * Registers remote animations for certain system transitions.
+     */
+    public void registerRemoteAnimations() {
+        // Do nothing
+    }
+
+    /**
+     * Unregisters all remote animations.
+     */
+    public void unregisterRemoteAnimations() {
+        // Do nothing
+    }
 }
diff --git a/src/com/android/launcher3/LauncherProvider.java b/src/com/android/launcher3/LauncherProvider.java
index 900c966..b0ab35c 100644
--- a/src/com/android/launcher3/LauncherProvider.java
+++ b/src/com/android/launcher3/LauncherProvider.java
@@ -18,6 +18,7 @@
 
 import static com.android.launcher3.provider.LauncherDbUtils.dropTable;
 import static com.android.launcher3.provider.LauncherDbUtils.tableExists;
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
 
 import android.annotation.TargetApi;
 import android.app.backup.BackupManager;
@@ -45,6 +46,7 @@
 import android.os.Binder;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.Handler;
 import android.os.Process;
 import android.os.UserHandle;
 import android.os.UserManager;
@@ -87,6 +89,8 @@
     private static final boolean LOGD = false;
 
     private static final String DOWNGRADE_SCHEMA_FILE = "downgrade_schema.json";
+    private static final String TOKEN_RESTORE_BACKUP_TABLE = "restore_backup_table";
+    private static final long RESTORE_BACKUP_TABLE_DELAY = 60000;
 
     /**
      * Represents the schema of the database. Changes in scheme need not be backwards compatible.
@@ -387,6 +391,14 @@
                         tableExists(mOpenHelper.getReadableDatabase(), Favorites.BACKUP_TABLE_NAME);
                 return null;
             }
+            case LauncherSettings.Settings.METHOD_RESTORE_BACKUP_TABLE: {
+                final Handler handler = MODEL_EXECUTOR.getHandler();
+                handler.removeCallbacksAndMessages(TOKEN_RESTORE_BACKUP_TABLE);
+                handler.postDelayed(() -> RestoreDbTask.restoreIfPossible(
+                        getContext(), mOpenHelper, new BackupManager(getContext())),
+                        TOKEN_RESTORE_BACKUP_TABLE, RESTORE_BACKUP_TABLE_DELAY);
+                return null;
+            }
         }
         return null;
     }
diff --git a/src/com/android/launcher3/LauncherSettings.java b/src/com/android/launcher3/LauncherSettings.java
index ec307db..4c5c61c 100644
--- a/src/com/android/launcher3/LauncherSettings.java
+++ b/src/com/android/launcher3/LauncherSettings.java
@@ -300,6 +300,8 @@
 
         public static final String METHOD_REFRESH_BACKUP_TABLE = "refresh_backup_table";
 
+        public static final String METHOD_RESTORE_BACKUP_TABLE = "restore_backup_table";
+
         public static final String EXTRA_VALUE = "value";
 
         public static Bundle call(ContentResolver cr, String method) {
diff --git a/src/com/android/launcher3/SessionCommitReceiver.java b/src/com/android/launcher3/SessionCommitReceiver.java
index f0bae02..89f0a3d 100644
--- a/src/com/android/launcher3/SessionCommitReceiver.java
+++ b/src/com/android/launcher3/SessionCommitReceiver.java
@@ -78,6 +78,7 @@
         }
 
         InstallSessionHelper packageInstallerCompat = InstallSessionHelper.INSTANCE.get(context);
+        packageInstallerCompat.restoreDbIfApplicable(info);
         if (TextUtils.isEmpty(info.getAppPackageName())
                 || info.getInstallReason() != PackageManager.INSTALL_REASON_USER
                 || packageInstallerCompat.promiseIconAddedForId(info.getSessionId())) {
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index 81dcba3..75609fe 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -136,6 +136,10 @@
     public static final TogglableFlag ENABLE_OVERVIEW_ACTIONS = new TogglableFlag(
             "ENABLE_OVERVIEW_ACTIONS", false, "Show app actions in Overview");
 
+    public static final TogglableFlag ENABLE_DATABASE_RESTORE = new TogglableFlag(
+            "ENABLE_DATABASE_RESTORE", true,
+            "Enable database restore when new restore session is created");
+
     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/model/GridBackupTable.java b/src/com/android/launcher3/model/GridBackupTable.java
index 11d4edd..fc9948e 100644
--- a/src/com/android/launcher3/model/GridBackupTable.java
+++ b/src/com/android/launcher3/model/GridBackupTable.java
@@ -27,6 +27,8 @@
 import android.os.Process;
 import android.util.Log;
 
+import androidx.annotation.IntDef;
+
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.LauncherSettings.Settings;
 import com.android.launcher3.pm.UserCache;
@@ -45,6 +47,19 @@
     private static final String KEY_GRID_Y_SIZE = Favorites.SPANY;
     private static final String KEY_DB_VERSION = Favorites.RANK;
 
+    public static final int OPTION_REQUIRES_SANITIZATION = 1;
+
+    /** STATE_NOT_FOUND indicates backup doesn't exist in the db. */
+    private static final int STATE_NOT_FOUND = 0;
+    /**
+     *  STATE_RAW indicates the backup has not yet been sanitized. This implies it might still
+     *  posses app info that doesn't exist in the workspace and needed to be sanitized before
+     *  put into use.
+     */
+    private static final int STATE_RAW = 1;
+    /** STATE_SANITIZED indicates the backup has already been sanitized, thus can be used as-is. */
+    private static final int STATE_SANITIZED = 2;
+
     private final Context mContext;
     private final SQLiteDatabase mDb;
 
@@ -56,6 +71,9 @@
     private int mRestoredGridX;
     private int mRestoredGridY;
 
+    @IntDef({STATE_NOT_FOUND, STATE_RAW, STATE_SANITIZED})
+    private @interface BackupState { }
+
     public GridBackupTable(Context context, SQLiteDatabase db,
             int hotseatSize, int gridX, int gridY) {
         mContext = context;
@@ -66,6 +84,10 @@
         mOldGridY = gridY;
     }
 
+    /**
+     * Create a backup from current workspace layout if one isn't created already (Note backup
+     * created this way is always sanitized). Otherwise restore from the backup instead.
+     */
     public boolean backupOrRestoreAsNeeded() {
         // Check if backup table exists
         if (!tableExists(mDb, BACKUP_TABLE_NAME)) {
@@ -74,16 +96,16 @@
                 // No need to copy if empty DB was created.
                 return false;
             }
-
-            copyTable(Favorites.TABLE_NAME, BACKUP_TABLE_NAME);
-            encodeDBProperties();
+            doBackup(UserCache.INSTANCE.get(mContext).getSerialNumberForUser(
+                    Process.myUserHandle()), 0);
             return false;
         }
-
-        if (!loadDbProperties()) {
+        if (loadDBProperties() != STATE_SANITIZED) {
             return false;
         }
-        copyTable(BACKUP_TABLE_NAME, Favorites.TABLE_NAME);
+        long userSerial = UserCache.INSTANCE.get(mContext).getSerialNumberForUser(
+                Process.myUserHandle());
+        copyTable(BACKUP_TABLE_NAME, Favorites.TABLE_NAME, userSerial);
         Log.d(TAG, "Backup table found");
         return true;
     }
@@ -93,43 +115,84 @@
         return mRestoredHotseatSize;
     }
 
-    private void copyTable(String from, String to) {
-        long userSerial = UserCache.INSTANCE.get(mContext).getSerialNumberForUser(
-                Process.myUserHandle());
+    /**
+     * Copy valid grid entries from one table to another.
+     */
+    private void copyTable(String from, String to, long userSerial) {
         dropTable(mDb, to);
         Favorites.addTableToDb(mDb, userSerial, false, to);
         mDb.execSQL("INSERT INTO " + to + " SELECT * FROM " + from + " where _id > " + ID_PROPERTY);
     }
 
-    private void encodeDBProperties() {
+    private void encodeDBProperties(int options) {
         ContentValues values = new ContentValues();
         values.put(Favorites._ID, ID_PROPERTY);
         values.put(KEY_DB_VERSION, mDb.getVersion());
         values.put(KEY_GRID_X_SIZE, mOldGridX);
         values.put(KEY_GRID_Y_SIZE, mOldGridY);
         values.put(KEY_HOTSEAT_SIZE, mOldHotseatSize);
+        values.put(Favorites.OPTIONS, options);
         mDb.insert(BACKUP_TABLE_NAME, null, values);
     }
 
-    private boolean loadDbProperties() {
+    /**
+     * Load DB properties from grid backup table.
+     */
+    public @BackupState int loadDBProperties() {
         try (Cursor c = mDb.query(BACKUP_TABLE_NAME, new String[] {
-                        KEY_DB_VERSION,     // 0
-                        KEY_GRID_X_SIZE,    // 1
-                        KEY_GRID_Y_SIZE,    // 2
-                        KEY_HOTSEAT_SIZE},  // 3
+                KEY_DB_VERSION,     // 0
+                KEY_GRID_X_SIZE,    // 1
+                KEY_GRID_Y_SIZE,    // 2
+                KEY_HOTSEAT_SIZE,   // 3
+                Favorites.OPTIONS}, // 4
                 "_id=" + ID_PROPERTY, null, null, null, null)) {
             if (!c.moveToNext()) {
                 Log.e(TAG, "Meta data not found in backup table");
-                return false;
+                return STATE_NOT_FOUND;
             }
-            if (mDb.getVersion() != c.getInt(0)) {
-                return false;
+            if (!validateDBVersion(mDb.getVersion(), c.getInt(0))) {
+                return STATE_NOT_FOUND;
             }
 
             mRestoredGridX = c.getInt(1);
             mRestoredGridY = c.getInt(2);
             mRestoredHotseatSize = c.getInt(3);
-            return true;
+            boolean isSanitized = (c.getInt(4) & OPTION_REQUIRES_SANITIZATION) == 0;
+            return isSanitized ? STATE_SANITIZED : STATE_RAW;
         }
     }
+
+    /**
+     * Restore workspace from raw backup if available.
+     */
+    public boolean restoreFromRawBackupIfAvailable(long oldProfileId) {
+        if (!tableExists(mDb, Favorites.BACKUP_TABLE_NAME)
+                || loadDBProperties() != STATE_RAW
+                || mOldHotseatSize != mRestoredHotseatSize
+                || mOldGridX != mRestoredGridX
+                || mOldGridY != mRestoredGridY) {
+            // skip restore if dimensions in backup table differs from current setup.
+            return false;
+        }
+        copyTable(Favorites.BACKUP_TABLE_NAME, Favorites.TABLE_NAME, oldProfileId);
+        Log.d(TAG, "Backup restored");
+        return true;
+    }
+
+    /**
+     * Performs a backup on the workspace layout.
+     */
+    public void doBackup(long profileId, int options) {
+        copyTable(Favorites.TABLE_NAME, Favorites.BACKUP_TABLE_NAME, profileId);
+        encodeDBProperties(options);
+    }
+
+    private static boolean validateDBVersion(int expected, int actual) {
+        if (expected != actual) {
+            Log.e(TAG, String.format("Launcher.db version mismatch, expecting %d but %d was found",
+                    expected, actual));
+            return false;
+        }
+        return true;
+    }
 }
diff --git a/src/com/android/launcher3/pm/InstallSessionHelper.java b/src/com/android/launcher3/pm/InstallSessionHelper.java
index 186293f..976d7ba 100644
--- a/src/com/android/launcher3/pm/InstallSessionHelper.java
+++ b/src/com/android/launcher3/pm/InstallSessionHelper.java
@@ -29,6 +29,10 @@
 import android.os.UserHandle;
 import android.text.TextUtils;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.RequiresApi;
+
+import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.SessionCommitReceiver;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.config.FeatureFlags;
@@ -52,6 +56,8 @@
     // Set<String> of session ids of promise icons that have been added to the home screen
     // as FLAG_PROMISE_NEW_INSTALLS.
     protected static final String PROMISE_ICON_IDS = "promise_icon_ids";
+    public static final String KEY_INSTALL_SESSION_CREATED_TIMESTAMP =
+            "key_install_session_created_timestamp";
 
     private static final boolean DEBUG = false;
 
@@ -159,6 +165,34 @@
         return list;
     }
 
+    /**
+     * Attempt to restore workspace layout if the session is triggered due to device restore and it
+     * has a newer timestamp.
+     */
+    public boolean restoreDbIfApplicable(@NonNull final SessionInfo info) {
+        if (!Utilities.ATLEAST_OREO || !FeatureFlags.ENABLE_DATABASE_RESTORE.get()) {
+            return false;
+        }
+        if (isRestore(info) && hasNewerTimestamp(mAppContext, info)) {
+            LauncherSettings.Settings.call(mAppContext.getContentResolver(),
+                    LauncherSettings.Settings.METHOD_RESTORE_BACKUP_TABLE);
+            return true;
+        }
+        return false;
+    }
+
+    @RequiresApi(26)
+    private static boolean isRestore(@NonNull final SessionInfo info) {
+        return info.getInstallReason() == PackageManager.INSTALL_REASON_DEVICE_RESTORE;
+    }
+
+    private static boolean hasNewerTimestamp(
+            @NonNull final Context context, @NonNull final SessionInfo info) {
+        return PackageManagerHelper.getSessionCreatedTimeInMillis(info)
+                > Utilities.getDevicePrefs(context).getLong(
+                        KEY_INSTALL_SESSION_CREATED_TIMESTAMP, 0);
+    }
+
     public boolean promiseIconAddedForId(int sessionId) {
         return mPromiseIconIds.contains(sessionId);
     }
diff --git a/src/com/android/launcher3/popup/PopupContainerWithArrow.java b/src/com/android/launcher3/popup/PopupContainerWithArrow.java
index 72c95c4..b764a07 100644
--- a/src/com/android/launcher3/popup/PopupContainerWithArrow.java
+++ b/src/com/android/launcher3/popup/PopupContainerWithArrow.java
@@ -351,7 +351,9 @@
     }
 
     public void applyNotificationInfos(List<NotificationInfo> notificationInfos) {
-        mNotificationItemView.applyNotificationInfos(notificationInfos);
+        if (mNotificationItemView != null) {
+            mNotificationItemView.applyNotificationInfos(notificationInfos);
+        }
     }
 
     private void updateHiddenShortcuts() {
diff --git a/src/com/android/launcher3/provider/RestoreDbTask.java b/src/com/android/launcher3/provider/RestoreDbTask.java
index 9987994..407ff31 100644
--- a/src/com/android/launcher3/provider/RestoreDbTask.java
+++ b/src/com/android/launcher3/provider/RestoreDbTask.java
@@ -16,6 +16,7 @@
 
 package com.android.launcher3.provider;
 
+import static com.android.launcher3.pm.InstallSessionHelper.KEY_INSTALL_SESSION_CREATED_TIMESTAMP;
 import static com.android.launcher3.provider.LauncherDbUtils.dropTable;
 
 import android.app.backup.BackupManager;
@@ -25,23 +26,28 @@
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.os.UserHandle;
+import android.text.TextUtils;
 import android.util.LongSparseArray;
 import android.util.SparseLongArray;
 
 import androidx.annotation.NonNull;
 
 import com.android.launcher3.AppWidgetsRestoredReceiver;
+import com.android.launcher3.InvariantDeviceProfile;
+import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherAppWidgetInfo;
 import com.android.launcher3.LauncherProvider.DatabaseHelper;
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.logging.FileLog;
+import com.android.launcher3.model.GridBackupTable;
 import com.android.launcher3.provider.LauncherDbUtils.SQLiteTransaction;
 import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.LogConfig;
 
 import java.io.InvalidObjectException;
+import java.util.Arrays;
 
 /**
  * Utility class to update DB schema after it has been restored.
@@ -65,6 +71,7 @@
         SQLiteDatabase db = helper.getWritableDatabase();
         try (SQLiteTransaction t = new SQLiteTransaction(db)) {
             RestoreDbTask task = new RestoreDbTask();
+            task.backupWorkspace(context, db);
             task.sanitizeDB(helper, db, backupManager);
             task.restoreAppWidgetIdsIfExists(context);
             t.commit();
@@ -76,6 +83,47 @@
     }
 
     /**
+     * Restore the workspace if backup is available.
+     */
+    public static boolean restoreIfPossible(@NonNull Context context,
+            @NonNull DatabaseHelper helper, @NonNull BackupManager backupManager) {
+        Utilities.getDevicePrefs(context).edit().putLong(
+                KEY_INSTALL_SESSION_CREATED_TIMESTAMP, System.currentTimeMillis()).apply();
+        final SQLiteDatabase db = helper.getWritableDatabase();
+        try (SQLiteTransaction t = new SQLiteTransaction(db)) {
+            RestoreDbTask task = new RestoreDbTask();
+            task.restoreWorkspace(context, db, helper, backupManager);
+            task.restoreAppWidgetIdsIfExists(context);
+            t.commit();
+            return true;
+        } catch (Exception e) {
+            FileLog.e(TAG, "Failed to restore db", e);
+            return false;
+        }
+    }
+
+    /**
+     * Backup the workspace so that if things go south in restore, we can recover these entries.
+     */
+    private void backupWorkspace(Context context, SQLiteDatabase db) throws Exception {
+        InvariantDeviceProfile idp = LauncherAppState.getIDP(context);
+        new GridBackupTable(context, db, idp.numHotseatIcons, idp.numColumns, idp.numRows)
+                .doBackup(getDefaultProfileId(db), GridBackupTable.OPTION_REQUIRES_SANITIZATION);
+    }
+
+    private void restoreWorkspace(@NonNull Context context, @NonNull SQLiteDatabase db,
+            @NonNull DatabaseHelper helper, @NonNull BackupManager backupManager)
+            throws Exception {
+        final InvariantDeviceProfile idp = LauncherAppState.getIDP(context);
+        GridBackupTable backupTable = new GridBackupTable(context, db,
+                idp.numHotseatIcons, idp.numColumns, idp.numRows);
+        if (backupTable.restoreFromRawBackupIfAvailable(getDefaultProfileId(db))) {
+            sanitizeDB(helper, db, backupManager);
+            LauncherAppState.getInstance(context).getModel().forceReload();
+        }
+    }
+
+    /**
      * Makes the following changes in the provider DB.
      *   1. Removes all entries belonging to any profiles that were not restored.
      *   2. Marks all entries as restored. The flags are updated during first load or as
@@ -107,22 +155,14 @@
         int numProfiles = profileMapping.size();
         String[] profileIds = new String[numProfiles];
         profileIds[0] = Long.toString(oldProfileId);
-        StringBuilder whereClause = new StringBuilder("profileId != ?");
-        for (int i = profileMapping.size() - 1; i >= 1; --i) {
-            whereClause.append(" AND profileId != ?");
+        for (int i = numProfiles - 1; i >= 1; --i) {
             profileIds[i] = Long.toString(profileMapping.keyAt(i));
         }
-        try {
-            int itemsDeleted = db.delete(Favorites.TABLE_NAME, whereClause.toString(), profileIds);
-            FileLog.d(TAG, itemsDeleted + " items from unrestored user(s) were deleted");
-        } catch (IllegalArgumentException exception) {
-            // b/147114476
-            FileLog.e(TAG, new StringBuilder("Failed to execute delete, where clause: '")
-                    .append(whereClause).append("', profile Id size:").append(profileIds.length)
-                    .append("profileIds: ").append(String.join(", ", profileIds)).toString()
-            );
-            throw exception;
-        }
+        final String[] args = new String[profileIds.length];
+        Arrays.fill(args, "?");
+        final String where = "profileId NOT IN (" + TextUtils.join(", ", Arrays.asList(args)) + ")";
+        int itemsDeleted = db.delete(Favorites.TABLE_NAME, where, profileIds);
+        FileLog.d(TAG, itemsDeleted + " items from unrestored user(s) were deleted");
 
         // Mark all items as restored.
         boolean keepAllIcons = Utilities.isPropertyEnabled(LogConfig.KEEP_ALL_ICONS);
@@ -132,15 +172,16 @@
         db.update(Favorites.TABLE_NAME, values, null, null);
 
         // Mark widgets with appropriate restore flag.
-        values.put(Favorites.RESTORED,  LauncherAppWidgetInfo.FLAG_ID_NOT_VALID |
-                LauncherAppWidgetInfo.FLAG_PROVIDER_NOT_READY |
-                LauncherAppWidgetInfo.FLAG_UI_NOT_READY |
-                (keepAllIcons ? LauncherAppWidgetInfo.FLAG_RESTORE_STARTED : 0));
+        values.put(Favorites.RESTORED,  LauncherAppWidgetInfo.FLAG_ID_NOT_VALID
+                | LauncherAppWidgetInfo.FLAG_PROVIDER_NOT_READY
+                | LauncherAppWidgetInfo.FLAG_UI_NOT_READY
+                | (keepAllIcons ? LauncherAppWidgetInfo.FLAG_RESTORE_STARTED : 0));
         db.update(Favorites.TABLE_NAME, values, "itemType = ?",
                 new String[]{Integer.toString(Favorites.ITEM_TYPE_APPWIDGET)});
 
-        // Migrate ids. To avoid any overlap, we initially move conflicting ids to a temp location.
-        // Using Long.MIN_VALUE since profile ids can not be negative, so there will be no overlap.
+        // Migrate ids. To avoid any overlap, we initially move conflicting ids to a temp
+        // location. Using Long.MIN_VALUE since profile ids can not be negative, so there will
+        // be no overlap.
         final long tempLocationOffset = Long.MIN_VALUE;
         SparseLongArray tempMigratedIds = new SparseLongArray(profileMapping.size());
         int numTempMigrations = 0;
@@ -198,10 +239,10 @@
     private LongSparseArray<Long> getManagedProfileIds(SQLiteDatabase db, long defaultProfileId) {
         LongSparseArray<Long> ids = new LongSparseArray<>();
         try (Cursor c = db.rawQuery("SELECT profileId from favorites WHERE profileId != ? "
-                + "GROUP BY profileId", new String[] {Long.toString(defaultProfileId)})){
-                while (c.moveToNext()) {
-                    ids.put(c.getLong(c.getColumnIndex(Favorites.PROFILE_ID)), null);
-                }
+                + "GROUP BY profileId", new String[] {Long.toString(defaultProfileId)})) {
+            while (c.moveToNext()) {
+                ids.put(c.getLong(c.getColumnIndex(Favorites.PROFILE_ID)), null);
+            }
         }
         return ids;
     }
@@ -222,7 +263,7 @@
      * Returns the profile id used in the favorites table of the provided db.
      */
     protected long getDefaultProfileId(SQLiteDatabase db) throws Exception {
-        try (Cursor c = db.rawQuery("PRAGMA table_info (favorites)", null)){
+        try (Cursor c = db.rawQuery("PRAGMA table_info (favorites)", null)) {
             int nameIndex = c.getColumnIndex(INFO_COLUMN_NAME);
             while (c.moveToNext()) {
                 if (Favorites.PROFILE_ID.equals(c.getString(nameIndex))) {
diff --git a/src/com/android/launcher3/testing/TestInformationHandler.java b/src/com/android/launcher3/testing/TestInformationHandler.java
index ecfc77c..506830d 100644
--- a/src/com/android/launcher3/testing/TestInformationHandler.java
+++ b/src/com/android/launcher3/testing/TestInformationHandler.java
@@ -126,11 +126,11 @@
 
             case TestProtocol.REQUEST_APPS_LIST_SCROLL_Y: {
                 try {
-                    final int deferUpdatesFlags = MAIN_EXECUTOR.submit(() ->
+                    final int scroll = MAIN_EXECUTOR.submit(() ->
                             mLauncher.getAppsView().getActiveRecyclerView().getCurrentScrollY())
                             .get();
                     response.putInt(TestProtocol.TEST_INFO_RESPONSE_FIELD,
-                            deferUpdatesFlags);
+                            scroll);
                 } catch (ExecutionException | InterruptedException e) {
                     throw new RuntimeException(e);
                 }
diff --git a/src/com/android/launcher3/testing/TestLogging.java b/src/com/android/launcher3/testing/TestLogging.java
new file mode 100644
index 0000000..fd066c1
--- /dev/null
+++ b/src/com/android/launcher3/testing/TestLogging.java
@@ -0,0 +1,29 @@
+/*
+ * 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.testing;
+
+import android.util.Log;
+
+import com.android.launcher3.Utilities;
+
+public final class TestLogging {
+    public static void recordEvent(String event) {
+        if (Utilities.IS_RUNNING_IN_TEST_HARNESS) {
+            Log.d(TestProtocol.TAPL_EVENTS_TAG, event);
+        }
+    }
+}
diff --git a/src/com/android/launcher3/testing/TestProtocol.java b/src/com/android/launcher3/testing/TestProtocol.java
index 929315a..01c207f 100644
--- a/src/com/android/launcher3/testing/TestProtocol.java
+++ b/src/com/android/launcher3/testing/TestProtocol.java
@@ -31,6 +31,7 @@
     public static final int QUICK_SWITCH_STATE_ORDINAL = 4;
     public static final int ALL_APPS_STATE_ORDINAL = 5;
     public static final int BACKGROUND_APP_STATE_ORDINAL = 6;
+    public static final String TAPL_EVENTS_TAG = "TaplEvents";
 
     public static String stateOrdinalToString(int ordinal) {
         switch (ordinal) {
diff --git a/src/com/android/launcher3/touch/AbstractStateChangeTouchController.java b/src/com/android/launcher3/touch/AbstractStateChangeTouchController.java
index f470edb..d193bef 100644
--- a/src/com/android/launcher3/touch/AbstractStateChangeTouchController.java
+++ b/src/com/android/launcher3/touch/AbstractStateChangeTouchController.java
@@ -508,7 +508,7 @@
             mAtomicComponentsController.getAnimationPlayer().end();
             mAtomicComponentsController = null;
         }
-        cancelAnimationControllers();
+        clearState();
         boolean shouldGoToTargetState = true;
         if (mPendingAnimation != null) {
             boolean reachedTarget = mToState == targetState;
@@ -546,13 +546,13 @@
             mAtomicAnim = null;
         }
         mScheduleResumeAtomicComponent = false;
+        mDetector.finishedScrolling();
+        mDetector.setDetectableScrollConditions(0, false);
     }
 
     private void cancelAnimationControllers() {
         mCurrentAnimation = null;
         cancelAtomicComponentsController();
-        mDetector.finishedScrolling();
-        mDetector.setDetectableScrollConditions(0, false);
     }
 
     private void cancelAtomicComponentsController() {
diff --git a/src/com/android/launcher3/touch/BaseSwipeDetector.java b/src/com/android/launcher3/touch/BaseSwipeDetector.java
index 12ca5ee..30283da 100644
--- a/src/com/android/launcher3/touch/BaseSwipeDetector.java
+++ b/src/com/android/launcher3/touch/BaseSwipeDetector.java
@@ -24,6 +24,10 @@
 import android.view.ViewConfiguration;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
+
+import java.util.LinkedList;
+import java.util.Queue;
 
 /**
  * Scroll/drag/swipe gesture detector.
@@ -49,13 +53,15 @@
     protected final boolean mIsRtl;
     protected final float mTouchSlop;
     protected final float mMaxVelocity;
+    private final Queue<Runnable> mSetStateQueue = new LinkedList<>();
 
     private int mActivePointerId = INVALID_POINTER_ID;
     private VelocityTracker mVelocityTracker;
     private PointF mLastDisplacement = new PointF();
     private PointF mDisplacement = new PointF();
     protected PointF mSubtractDisplacement = new PointF();
-    private ScrollState mState = ScrollState.IDLE;
+    @VisibleForTesting ScrollState mState = ScrollState.IDLE;
+    private boolean mIsSettingState;
 
     protected boolean mIgnoreSlopWhenSettling;
 
@@ -195,6 +201,12 @@
     // SETTLING -> (View settled) -> IDLE
 
     private void setState(ScrollState newState) {
+        if (mIsSettingState) {
+            mSetStateQueue.add(() -> setState(newState));
+            return;
+        }
+        mIsSettingState = true;
+
         if (DBG) {
             Log.d(TAG, "setState:" + mState + "->" + newState);
         }
@@ -212,6 +224,10 @@
         }
 
         mState = newState;
+        mIsSettingState = false;
+        if (!mSetStateQueue.isEmpty()) {
+            mSetStateQueue.remove().run();
+        }
     }
 
     private void initializeDragging() {
diff --git a/src/com/android/launcher3/touch/WorkspaceTouchListener.java b/src/com/android/launcher3/touch/WorkspaceTouchListener.java
index 66fdc94..310d598 100644
--- a/src/com/android/launcher3/touch/WorkspaceTouchListener.java
+++ b/src/com/android/launcher3/touch/WorkspaceTouchListener.java
@@ -25,7 +25,6 @@
 
 import android.graphics.PointF;
 import android.graphics.Rect;
-import android.util.Log;
 import android.view.GestureDetector;
 import android.view.HapticFeedbackConstants;
 import android.view.MotionEvent;
@@ -37,10 +36,8 @@
 import com.android.launcher3.CellLayout;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Launcher;
-import com.android.launcher3.Utilities;
 import com.android.launcher3.Workspace;
 import com.android.launcher3.dragndrop.DragLayer;
-import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.views.OptionsPopupView;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action;
 import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
@@ -178,9 +175,6 @@
                 mLauncher.getUserEventDispatcher().logActionOnContainer(Action.Touch.LONGPRESS,
                         Action.Direction.NONE, ContainerType.WORKSPACE,
                         mWorkspace.getCurrentPage());
-                if (Utilities.IS_RUNNING_IN_TEST_HARNESS) {
-                    Log.d(TestProtocol.PERMANENT_DIAG_TAG, "Opening options popup on long press");
-                }
                 OptionsPopupView.showDefaultOptions(mLauncher, mTouchDownPoint.x, mTouchDownPoint.y);
             } else {
                 cancelLongPress();
diff --git a/src/com/android/launcher3/util/PackageManagerHelper.java b/src/com/android/launcher3/util/PackageManagerHelper.java
index 8b2ee36..6c18747 100644
--- a/src/com/android/launcher3/util/PackageManagerHelper.java
+++ b/src/com/android/launcher3/util/PackageManagerHelper.java
@@ -16,6 +16,7 @@
 
 package com.android.launcher3.util;
 
+import static android.content.pm.PackageInstaller.SessionInfo;
 import static android.content.pm.PackageManager.MATCH_SYSTEM_ONLY;
 
 import android.app.AppOpsManager;
@@ -44,6 +45,8 @@
 import android.util.Pair;
 import android.widget.Toast;
 
+import androidx.annotation.NonNull;
+
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.LauncherAppWidgetInfo;
@@ -345,4 +348,15 @@
         }
         return false;
     }
+
+    /**
+     * Returns the created time in millis of given session info. Returns 0 if not available.
+     */
+    public static long getSessionCreatedTimeInMillis(@NonNull final SessionInfo info) {
+        try {
+            return (long) SessionInfo.class.getDeclaredMethod("getCreatedMillis").invoke(info);
+        } catch (Exception e) {
+            return 0;
+        }
+    }
 }
diff --git a/tests/src/com/android/launcher3/touch/SingleAxisSwipeDetectorTest.java b/tests/src/com/android/launcher3/touch/SingleAxisSwipeDetectorTest.java
index 5174e4d..6d463b5 100644
--- a/tests/src/com/android/launcher3/touch/SingleAxisSwipeDetectorTest.java
+++ b/tests/src/com/android/launcher3/touch/SingleAxisSwipeDetectorTest.java
@@ -21,9 +21,11 @@
 import static com.android.launcher3.touch.SingleAxisSwipeDetector.HORIZONTAL;
 import static com.android.launcher3.touch.SingleAxisSwipeDetector.VERTICAL;
 
+import static org.junit.Assert.assertTrue;
 import static org.mockito.Matchers.anyBoolean;
 import static org.mockito.Matchers.anyFloat;
 import static org.mockito.Matchers.anyObject;
+import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.verify;
@@ -168,4 +170,21 @@
         // TODO: actually calculate the following parameters and do exact value checks.
         verify(mMockListener).onDragEnd(anyFloat());
     }
+
+    @Test
+    public void testInterleavedSetState() {
+        doAnswer(invocationOnMock -> {
+            // Sets state to IDLE. (Normally onDragEnd() will have state SETTLING.)
+            mDetector.finishedScrolling();
+            return null;
+        }).when(mMockListener).onDragEnd(anyFloat());
+
+        mGenerator.put(0, 100, 100);
+        mGenerator.move(0, 100, 100 + mTouchSlop);
+        mGenerator.move(0, 100, 100 + mTouchSlop * 2);
+        mGenerator.lift(0);
+        verify(mMockListener).onDragEnd(anyFloat());
+        assertTrue("SwipeDetector should be IDLE but was " + mDetector.mState,
+                mDetector.isIdleState());
+    }
 }
diff --git a/tests/tapl/com/android/launcher3/tapl/AddToHomeScreenPrompt.java b/tests/tapl/com/android/launcher3/tapl/AddToHomeScreenPrompt.java
index 03d1600..afb50e0 100644
--- a/tests/tapl/com/android/launcher3/tapl/AddToHomeScreenPrompt.java
+++ b/tests/tapl/com/android/launcher3/tapl/AddToHomeScreenPrompt.java
@@ -37,8 +37,10 @@
     }
 
     public void addAutomatically() {
-        mLauncher.waitForObjectInContainer(
-                mWidgetCell.getParent().getParent().getParent().getParent(),
-                By.text(ADD_AUTOMATICALLY)).click();
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+            mLauncher.waitForObjectInContainer(
+                    mWidgetCell.getParent().getParent().getParent().getParent(),
+                    By.text(ADD_AUTOMATICALLY)).click();
+        }
     }
 }
diff --git a/tests/tapl/com/android/launcher3/tapl/AllApps.java b/tests/tapl/com/android/launcher3/tapl/AllApps.java
index 3bdeb14..4a2d699 100644
--- a/tests/tapl/com/android/launcher3/tapl/AllApps.java
+++ b/tests/tapl/com/android/launcher3/tapl/AllApps.java
@@ -99,8 +99,9 @@
      */
     @NonNull
     public AppIcon getAppIcon(String appName) {
-        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
-                "getting app icon " + appName + " on all apps")) {
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                     "getting app icon " + appName + " on all apps")) {
             final UiObject2 allAppsContainer = verifyActiveContainer();
             final UiObject2 appListRecycler = mLauncher.waitForObjectInContainer(allAppsContainer,
                     "apps_list_view");
@@ -130,6 +131,9 @@
                                 searchBox.getVisibleBounds().bottom
                                         - allAppsContainer.getVisibleBounds().top);
                         final int newScroll = getAllAppsScroll();
+                        mLauncher.assertTrue(
+                                "Scrolled in a wrong direction in AllApps: from " + scroll + " to "
+                                        + newScroll, newScroll >= scroll);
                         if (newScroll == scroll) break;
 
                         mLauncher.assertTrue(
@@ -197,7 +201,8 @@
      * Flings forward (down) and waits the fling's end.
      */
     public void flingForward() {
-        try (LauncherInstrumentation.Closable c =
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c =
                      mLauncher.addContextLayer("want to fling forward in all apps")) {
             final UiObject2 allAppsContainer = verifyActiveContainer();
             // Start the gesture in the center to avoid starting at elements near the top.
@@ -211,7 +216,8 @@
      * Flings backward (up) and waits the fling's end.
      */
     public void flingBackward() {
-        try (LauncherInstrumentation.Closable c =
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c =
                      mLauncher.addContextLayer("want to fling backward in all apps")) {
             final UiObject2 allAppsContainer = verifyActiveContainer();
             // Start the gesture in the center, for symmetry with forward.
diff --git a/tests/tapl/com/android/launcher3/tapl/AllAppsFromOverview.java b/tests/tapl/com/android/launcher3/tapl/AllAppsFromOverview.java
index f48d4dd..8f9fec9 100644
--- a/tests/tapl/com/android/launcher3/tapl/AllAppsFromOverview.java
+++ b/tests/tapl/com/android/launcher3/tapl/AllAppsFromOverview.java
@@ -42,8 +42,9 @@
      */
     @NonNull
     public Overview switchBackToOverview() {
-        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
-                "want to switch back from all apps to overview")) {
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                     "want to switch back from all apps to overview")) {
             final UiObject2 allAppsContainer = verifyActiveContainer();
             // Swipe from the search box to the bottom.
             final UiObject2 qsb = mLauncher.waitForObjectInContainer(
diff --git a/tests/tapl/com/android/launcher3/tapl/AppIcon.java b/tests/tapl/com/android/launcher3/tapl/AppIcon.java
index 2da6344..0a6ed7f 100644
--- a/tests/tapl/com/android/launcher3/tapl/AppIcon.java
+++ b/tests/tapl/com/android/launcher3/tapl/AppIcon.java
@@ -26,6 +26,7 @@
  * App icon, whether in all apps or in workspace/
  */
 public final class AppIcon extends Launchable {
+
     AppIcon(LauncherInstrumentation launcher, UiObject2 icon) {
         super(launcher, icon);
     }
@@ -38,8 +39,10 @@
      * Long-clicks the icon to open its menu.
      */
     public AppIconMenu openMenu() {
-        return new AppIconMenu(mLauncher, mLauncher.clickAndGet(
-                mObject, "deep_shortcuts_container"));
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+            return new AppIconMenu(mLauncher, mLauncher.clickAndGet(
+                    mObject, "deep_shortcuts_container"));
+        }
     }
 
     @Override
diff --git a/tests/tapl/com/android/launcher3/tapl/Background.java b/tests/tapl/com/android/launcher3/tapl/Background.java
index d9ae778..50bdf5c 100644
--- a/tests/tapl/com/android/launcher3/tapl/Background.java
+++ b/tests/tapl/com/android/launcher3/tapl/Background.java
@@ -52,8 +52,9 @@
      */
     @NonNull
     public BaseOverview switchToOverview() {
-        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
-                "want to switch from background to overview")) {
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                     "want to switch from background to overview")) {
             verifyActiveContainer();
             goToOverviewUnchecked();
             return mLauncher.isFallbackOverview() ?
@@ -124,8 +125,9 @@
      * Swipes right or double presses the square button to switch to the previous app.
      */
     public Background quickSwitchToPreviousApp() {
-        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
-                "want to quick switch to the previous app")) {
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                     "want to quick switch to the previous app")) {
             verifyActiveContainer();
             quickSwitchToPreviousApp(getExpectedStateForQuickSwitch());
             return new Background(mLauncher);
diff --git a/tests/tapl/com/android/launcher3/tapl/BaseOverview.java b/tests/tapl/com/android/launcher3/tapl/BaseOverview.java
index 339e14f..e13ea52 100644
--- a/tests/tapl/com/android/launcher3/tapl/BaseOverview.java
+++ b/tests/tapl/com/android/launcher3/tapl/BaseOverview.java
@@ -48,6 +48,12 @@
      * Flings forward (left) and waits the fling's end.
      */
     public void flingForward() {
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+            flingForwardImpl();
+        }
+    }
+
+    private void flingForwardImpl() {
         try (LauncherInstrumentation.Closable c =
                      mLauncher.addContextLayer("want to fling forward in overview")) {
             LauncherInstrumentation.log("Overview.flingForward before fling");
@@ -65,14 +71,15 @@
      * Dismissed all tasks by scrolling to Clear-all button and pressing it.
      */
     public void dismissAllTasks() {
-        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
-                "dismissing all tasks")) {
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                     "dismissing all tasks")) {
             final BySelector clearAllSelector = mLauncher.getOverviewObjectSelector("clear_all");
             for (int i = 0;
                     i < FLINGS_FOR_DISMISS_LIMIT
                             && !verifyActiveContainer().hasObject(clearAllSelector);
                     ++i) {
-                flingForward();
+                flingForwardImpl();
             }
 
             mLauncher.waitForObjectInContainer(verifyActiveContainer(), clearAllSelector).click();
@@ -83,7 +90,8 @@
      * Flings backward (right) and waits the fling's end.
      */
     public void flingBackward() {
-        try (LauncherInstrumentation.Closable c =
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c =
                      mLauncher.addContextLayer("want to fling backward in overview")) {
             LauncherInstrumentation.log("Overview.flingBackward before fling");
             final UiObject2 overview = verifyActiveContainer();
diff --git a/tests/tapl/com/android/launcher3/tapl/Home.java b/tests/tapl/com/android/launcher3/tapl/Home.java
index 1e4d937..1a0fe3d 100644
--- a/tests/tapl/com/android/launcher3/tapl/Home.java
+++ b/tests/tapl/com/android/launcher3/tapl/Home.java
@@ -48,8 +48,9 @@
     @NonNull
     @Override
     public Overview switchToOverview() {
-        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
-                "want to switch from home to overview")) {
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                     "want to switch from home to overview")) {
             verifyActiveContainer();
             goToOverviewUnchecked();
             try (LauncherInstrumentation.Closable c1 = mLauncher.addContextLayer(
diff --git a/tests/tapl/com/android/launcher3/tapl/Launchable.java b/tests/tapl/com/android/launcher3/tapl/Launchable.java
index 6881197..f88a616 100644
--- a/tests/tapl/com/android/launcher3/tapl/Launchable.java
+++ b/tests/tapl/com/android/launcher3/tapl/Launchable.java
@@ -46,7 +46,9 @@
      * Clicks the object to launch its app.
      */
     public Background launch(String expectedPackageName) {
-        return launch(By.pkg(expectedPackageName));
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+            return launch(By.pkg(expectedPackageName));
+        }
     }
 
     private Background launch(BySelector selector) {
@@ -69,17 +71,20 @@
      * Drags an object to the center of homescreen.
      */
     public void dragToWorkspace() {
-        final Point launchableCenter = getObject().getVisibleCenter();
-        final Point displaySize = mLauncher.getRealDisplaySize();
-        final int width = displaySize.x / 2;
-        Workspace.dragIconToWorkspace(
-                mLauncher,
-                this,
-                new Point(
-                        launchableCenter.x >= width ?
-                                launchableCenter.x - width / 2 : launchableCenter.x + width / 2,
-                        displaySize.y / 2),
-                getLongPressIndicator());
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+            final Point launchableCenter = getObject().getVisibleCenter();
+            final Point displaySize = mLauncher.getRealDisplaySize();
+            final int width = displaySize.x / 2;
+            Workspace.dragIconToWorkspace(
+                    mLauncher,
+                    this,
+                    new Point(
+                            launchableCenter.x >= width
+                                    ? launchableCenter.x - width / 2
+                                    : launchableCenter.x + width / 2,
+                            displaySize.y / 2),
+                    getLongPressIndicator());
+        }
     }
 
     protected abstract String getLongPressIndicator();
diff --git a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
index 95c4997..6df8790 100644
--- a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
+++ b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
@@ -79,6 +79,8 @@
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Supplier;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
 /**
@@ -92,6 +94,13 @@
     private static final int GESTURE_STEP_MS = 16;
     private static long START_TIME = System.currentTimeMillis();
 
+    static final Pattern LOG_TIME = Pattern.compile(
+            "[0-9][0-9]-[0-9][0-9] [0-9][0-9]:[0-9][0-9]:[0-9][0-9]\\.[0-9][0-9][0-9]");
+
+    static final Pattern EVENT_LOG_ENTRY = Pattern.compile(
+            "(?<time>[0-9][0-9]-[0-9][0-9] [0-9][0-9]:[0-9][0-9]:[0-9][0-9]\\.[0-9][0-9][0-9])"
+                    + ".*" + TestProtocol.TAPL_EVENTS_TAG + ": (?<event>.*)");
+
     // Types for launcher containers that the user is interacting with. "Background" is a
     // pseudo-container corresponding to inactive launcher covered by another app.
     public enum ContainerType {
@@ -146,6 +155,11 @@
 
     private Consumer<ContainerType> mOnSettledStateAction;
 
+    // Not null when we are collecting expected events to compare with actual ones.
+    private List<Pattern> mExpectedEvents;
+
+    private String mTimeBeforeFirstLogEvent;
+
     /**
      * Constructs the root of TAPL hierarchy. You get all other objects from it.
      */
@@ -299,8 +313,11 @@
     public void checkForAnomaly() {
         final String anomalyMessage = getAnomalyMessage();
         if (anomalyMessage != null) {
-            failWithSystemHealth(
-                    "Tests are broken by a non-Launcher system error: " + anomalyMessage);
+            String message = "Tests are broken by a non-Launcher system error: " + anomalyMessage;
+            log("Hierarchy dump for: " + message);
+            dumpViewHierarchy();
+
+            Assert.fail(formatSystemHealthMessage(message));
         }
     }
 
@@ -339,7 +356,7 @@
         mOnSettledStateAction = onSettledStateAction;
     }
 
-    private String getSystemHealthMessage() {
+    private String formatSystemHealthMessage(String message) {
         final String testPackage = getContext().getPackageName();
 
         mInstrumentation.getUiAutomation().grantRuntimePermission(
@@ -347,30 +364,34 @@
         mInstrumentation.getUiAutomation().grantRuntimePermission(
                 testPackage, "android.permission.PACKAGE_USAGE_STATS");
 
-        return mSystemHealthSupplier != null
+        final String systemHealth = mSystemHealthSupplier != null
                 ? mSystemHealthSupplier.apply(START_TIME)
                 : TestHelpers.getSystemHealthMessage(getContext(), START_TIME);
+
+        if (systemHealth != null) {
+            return message
+                    + ",\nperhaps linked to system health problems:\n<<<<<<<<<<<<<<<<<<\n"
+                    + systemHealth + "\n>>>>>>>>>>>>>>>>>>";
+        }
+
+        return message;
     }
 
     private void fail(String message) {
         checkForAnomaly();
 
-        failWithSystemHealth("http://go/tapl : " + getContextDescription() + message +
-                " (visible state: " + getVisibleStateMessage() + ")");
-    }
-
-    private void failWithSystemHealth(String message) {
-        final String systemHealth = getSystemHealthMessage();
-        if (systemHealth != null) {
-            message = message
-                    + ", perhaps because of system health problems:\n<<<<<<<<<<<<<<<<<<\n"
-                    + systemHealth + "\n>>>>>>>>>>>>>>>>>>";
-        }
-
+        message = "http://go/tapl : " + getContextDescription() + message
+                + " (visible state: " + getVisibleStateMessage() + ")";
         log("Hierarchy dump for: " + message);
         dumpViewHierarchy();
 
-        Assert.fail(message);
+        final String eventMismatch = getEventMismatchMessage();
+
+        if (eventMismatch != null) {
+            message = message + ",\nhaving produced wrong events:\n    " + eventMismatch;
+        }
+
+        Assert.fail(formatSystemHealthMessage(message));
     }
 
     private String getContextDescription() {
@@ -539,61 +560,63 @@
      * @return the Workspace object.
      */
     public Workspace pressHome() {
-        // Click home, then wait for any accessibility event, then wait until accessibility events
-        // stop.
-        // We need waiting for any accessibility event generated after pressing Home because
-        // otherwise waitForIdle may return immediately in case when there was a big enough pause in
-        // accessibility events prior to pressing Home.
-        final String action;
-        if (getNavigationModel() == NavigationModel.ZERO_BUTTON) {
-            checkForAnomaly();
+        try (LauncherInstrumentation.Closable e = eventsCheck()) {
+            // Click home, then wait for any accessibility event, then wait until accessibility
+            // events stop.
+            // We need waiting for any accessibility event generated after pressing Home because
+            // otherwise waitForIdle may return immediately in case when there was a big enough
+            // pause in accessibility events prior to pressing Home.
+            final String action;
+            if (getNavigationModel() == NavigationModel.ZERO_BUTTON) {
+                checkForAnomaly();
 
-            final Point displaySize = getRealDisplaySize();
+                final Point displaySize = getRealDisplaySize();
 
-            if (hasLauncherObject(CONTEXT_MENU_RES_ID)) {
-                linearGesture(
-                        displaySize.x / 2, displaySize.y - 1,
-                        displaySize.x / 2, 0,
-                        ZERO_BUTTON_STEPS_FROM_BACKGROUND_TO_HOME,
-                        false);
-                try (LauncherInstrumentation.Closable c = addContextLayer(
-                        "Swiped up from context menu to home")) {
-                    waitUntilGone(CONTEXT_MENU_RES_ID);
-                }
-            }
-            if (hasLauncherObject(WORKSPACE_RES_ID)) {
-                log(action = "already at home");
-            } else {
-                log("Hierarchy before swiping up to home:");
-                dumpViewHierarchy();
-                log(action = "swiping up to home from " + getVisibleStateMessage());
-
-                try (LauncherInstrumentation.Closable c = addContextLayer(action)) {
-                    swipeToState(
+                if (hasLauncherObject(CONTEXT_MENU_RES_ID)) {
+                    linearGesture(
                             displaySize.x / 2, displaySize.y - 1,
                             displaySize.x / 2, 0,
-                            ZERO_BUTTON_STEPS_FROM_BACKGROUND_TO_HOME, NORMAL_STATE_ORDINAL);
+                            ZERO_BUTTON_STEPS_FROM_BACKGROUND_TO_HOME,
+                            false);
+                    try (LauncherInstrumentation.Closable c = addContextLayer(
+                            "Swiped up from context menu to home")) {
+                        waitUntilGone(CONTEXT_MENU_RES_ID);
+                    }
+                }
+                if (hasLauncherObject(WORKSPACE_RES_ID)) {
+                    log(action = "already at home");
+                } else {
+                    log("Hierarchy before swiping up to home:");
+                    dumpViewHierarchy();
+                    log(action = "swiping up to home from " + getVisibleStateMessage());
+
+                    try (LauncherInstrumentation.Closable c = addContextLayer(action)) {
+                        swipeToState(
+                                displaySize.x / 2, displaySize.y - 1,
+                                displaySize.x / 2, 0,
+                                ZERO_BUTTON_STEPS_FROM_BACKGROUND_TO_HOME, NORMAL_STATE_ORDINAL);
+                    }
+                }
+            } else {
+                log("Hierarchy before clicking home:");
+                dumpViewHierarchy();
+                log(action = "clicking home button from " + getVisibleStateMessage());
+                try (LauncherInstrumentation.Closable c = addContextLayer(action)) {
+                    mDevice.waitForIdle();
+                    runToState(
+                            waitForSystemUiObject("home")::click,
+                            NORMAL_STATE_ORDINAL,
+                            !hasLauncherObject(WORKSPACE_RES_ID)
+                                    && (hasLauncherObject(APPS_RES_ID)
+                                    || hasLauncherObject(OVERVIEW_RES_ID)));
+                    mDevice.waitForIdle();
                 }
             }
-        } else {
-            log("Hierarchy before clicking home:");
-            dumpViewHierarchy();
-            log(action = "clicking home button from " + getVisibleStateMessage());
-            try (LauncherInstrumentation.Closable c = addContextLayer(action)) {
-                mDevice.waitForIdle();
-                runToState(
-                        () -> waitForSystemUiObject("home").click(),
-                        NORMAL_STATE_ORDINAL,
-                        !hasLauncherObject(WORKSPACE_RES_ID)
-                                && (hasLauncherObject(APPS_RES_ID)
-                                || hasLauncherObject(OVERVIEW_RES_ID)));
-                mDevice.waitForIdle();
+            try (LauncherInstrumentation.Closable c = addContextLayer(
+                    "performed action to switch to Home - " + action)) {
+                return getWorkspace();
             }
         }
-        try (LauncherInstrumentation.Closable c = addContextLayer(
-                "performed action to switch to Home - " + action)) {
-            return getWorkspace();
-        }
     }
 
     /**
@@ -1099,4 +1122,104 @@
         }
         return tasks;
     }
+
+    private List<String> getEvents() {
+        final ArrayList<String> events = new ArrayList<>();
+        try {
+            final String logcatTimeParameter =
+                    mTimeBeforeFirstLogEvent != null ? " -t " + mTimeBeforeFirstLogEvent : "";
+            final String logcatEvents = mDevice.executeShellCommand(
+                    "logcat -d --pid=" + getPid() + logcatTimeParameter
+                            + " -s " + TestProtocol.TAPL_EVENTS_TAG);
+            final Matcher matcher = EVENT_LOG_ENTRY.matcher(logcatEvents);
+            while (matcher.find()) {
+                final String eventTime = matcher.group("time");
+                if (eventTime.equals(mTimeBeforeFirstLogEvent)) continue;
+
+                events.add(matcher.group("event"));
+            }
+            return events;
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private void startRecordingEvents() {
+        Assert.assertTrue("Already recording events", mExpectedEvents == null);
+        mExpectedEvents = new ArrayList<>();
+
+        try {
+            final String lastLogLine =
+                    mDevice.executeShellCommand("logcat -d --pid=" + getPid() + " -t 1");
+            final Matcher matcher = LOG_TIME.matcher(lastLogLine);
+            mTimeBeforeFirstLogEvent = matcher.find() ? matcher.group().replaceAll(" ", "") : null;
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private void stopRecordingEvents() {
+        mExpectedEvents = null;
+    }
+
+    Closable eventsCheck() {
+        // Entering events check block.
+        startRecordingEvents();
+
+        return () -> {
+            // Leaving events check block.
+            if (mExpectedEvents == null) {
+                return; // There was a failure. Noo need to report another one.
+            }
+
+            // Wait until Launcher generates expected number of events.
+            final long endTime = SystemClock.uptimeMillis() + WAIT_TIME_MS;
+            while (SystemClock.uptimeMillis() < endTime
+                    && getEvents().size() < mExpectedEvents.size()) {
+                SystemClock.sleep(100);
+            }
+
+            final String message = getEventMismatchMessage();
+            if (message != null) {
+                Assert.fail(formatSystemHealthMessage(
+                        "http://go/tapl : unexpected event sequence: " + message));
+            }
+        };
+    }
+
+    void expectEvent(Pattern expected) {
+        if (mExpectedEvents != null) mExpectedEvents.add(expected);
+    }
+
+    private String getEventMismatchMessage() {
+        if (mExpectedEvents == null) return null;
+
+        try {
+            final List<String> actual = getEvents();
+
+            for (int i = 0; i < mExpectedEvents.size(); ++i) {
+                if (i >= actual.size()) {
+                    return formatEventMismatchMessage("too few actual events", actual, i);
+                }
+                if (!mExpectedEvents.get(i).matcher(actual.get(i)).find()) {
+                    return formatEventMismatchMessage("mismatched event", actual, i);
+                }
+            }
+
+            if (actual.size() > mExpectedEvents.size()) {
+                return formatEventMismatchMessage(
+                        "too many actual events", actual, mExpectedEvents.size());
+            }
+        } finally {
+            stopRecordingEvents();
+        }
+
+        return null;
+    }
+
+    private String formatEventMismatchMessage(String message, List<String> actual, int position) {
+        return message + ", pos=" + position
+                + ", expected=" + mExpectedEvents
+                + ", actual=" + actual;
+    }
 }
\ No newline at end of file
diff --git a/tests/tapl/com/android/launcher3/tapl/OptionsPopupMenuItem.java b/tests/tapl/com/android/launcher3/tapl/OptionsPopupMenuItem.java
index 8527d05..461610d 100644
--- a/tests/tapl/com/android/launcher3/tapl/OptionsPopupMenuItem.java
+++ b/tests/tapl/com/android/launcher3/tapl/OptionsPopupMenuItem.java
@@ -35,12 +35,14 @@
      */
     @NonNull
     public void launch(@NonNull String expectedPackageName) {
-        LauncherInstrumentation.log("OptionsPopupMenuItem before click "
-                + mObject.getVisibleCenter() + " in " + mObject.getVisibleBounds());
-        mObject.click();
-        mLauncher.assertTrue(
-                "App didn't start: " + By.pkg(expectedPackageName),
-                mLauncher.getDevice().wait(Until.hasObject(By.pkg(expectedPackageName)),
-                        LauncherInstrumentation.WAIT_TIME_MS));
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+            LauncherInstrumentation.log("OptionsPopupMenuItem before click "
+                    + mObject.getVisibleCenter() + " in " + mObject.getVisibleBounds());
+            mObject.click();
+            mLauncher.assertTrue(
+                    "App didn't start: " + By.pkg(expectedPackageName),
+                    mLauncher.getDevice().wait(Until.hasObject(By.pkg(expectedPackageName)),
+                            LauncherInstrumentation.WAIT_TIME_MS));
+        }
     }
 }
diff --git a/tests/tapl/com/android/launcher3/tapl/Overview.java b/tests/tapl/com/android/launcher3/tapl/Overview.java
index 16a64a7..6622c6e 100644
--- a/tests/tapl/com/android/launcher3/tapl/Overview.java
+++ b/tests/tapl/com/android/launcher3/tapl/Overview.java
@@ -45,8 +45,9 @@
      */
     @NonNull
     public AllAppsFromOverview switchToAllApps() {
-        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
-                "want to switch from overview to all apps")) {
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                     "want to switch from overview to all apps")) {
             verifyActiveContainer();
 
             // Swipe from an app icon to the top.
diff --git a/tests/tapl/com/android/launcher3/tapl/OverviewTask.java b/tests/tapl/com/android/launcher3/tapl/OverviewTask.java
index 46f8ba5..0d93cbc 100644
--- a/tests/tapl/com/android/launcher3/tapl/OverviewTask.java
+++ b/tests/tapl/com/android/launcher3/tapl/OverviewTask.java
@@ -45,8 +45,9 @@
      * Swipes the task up.
      */
     public void dismiss() {
-        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
-                "want to dismiss a task")) {
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                     "want to dismiss a task")) {
             verifyActiveContainer();
             // Dismiss the task via flinging it up.
             final Rect taskBounds = mTask.getVisibleBounds();
@@ -61,15 +62,17 @@
      * Clicks at the task.
      */
     public Background open() {
-        verifyActiveContainer();
-        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
-                "clicking an overview task")) {
-            mLauncher.executeAndWaitForEvent(
-                    () -> mTask.click(),
-                    event -> event.getEventType() == TYPE_WINDOW_STATE_CHANGED,
-                    () -> "Launching task didn't open a new window: "
-                            + mTask.getParent().getContentDescription());
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+            verifyActiveContainer();
+            try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                    "clicking an overview task")) {
+                mLauncher.executeAndWaitForEvent(
+                        () -> mTask.click(),
+                        event -> event.getEventType() == TYPE_WINDOW_STATE_CHANGED,
+                        () -> "Launching task didn't open a new window: "
+                                + mTask.getParent().getContentDescription());
+            }
+            return new Background(mLauncher);
         }
-        return new Background(mLauncher);
     }
 }
diff --git a/tests/tapl/com/android/launcher3/tapl/Widget.java b/tests/tapl/com/android/launcher3/tapl/Widget.java
index 1b6d8c4..dfd74ed 100644
--- a/tests/tapl/com/android/launcher3/tapl/Widget.java
+++ b/tests/tapl/com/android/launcher3/tapl/Widget.java
@@ -22,6 +22,7 @@
  * Widget in workspace or a widget list.
  */
 public final class Widget extends Launchable {
+
     Widget(LauncherInstrumentation launcher, UiObject2 icon) {
         super(launcher, icon);
     }
diff --git a/tests/tapl/com/android/launcher3/tapl/Widgets.java b/tests/tapl/com/android/launcher3/tapl/Widgets.java
index d208c66..ede5bd9 100644
--- a/tests/tapl/com/android/launcher3/tapl/Widgets.java
+++ b/tests/tapl/com/android/launcher3/tapl/Widgets.java
@@ -41,8 +41,9 @@
      * Flings forward (down) and waits the fling's end.
      */
     public void flingForward() {
-        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
-                "want to fling forward in widgets")) {
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                     "want to fling forward in widgets")) {
             LauncherInstrumentation.log("Widgets.flingForward enter");
             final UiObject2 widgetsContainer = verifyActiveContainer();
             mLauncher.scroll(
@@ -62,8 +63,9 @@
      * Flings backward (up) and waits the fling's end.
      */
     public void flingBackward() {
-        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
-                "want to fling backwards in widgets")) {
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                     "want to fling backwards in widgets")) {
             LauncherInstrumentation.log("Widgets.flingBackward enter");
             final UiObject2 widgetsContainer = verifyActiveContainer();
             mLauncher.scroll(
diff --git a/tests/tapl/com/android/launcher3/tapl/Workspace.java b/tests/tapl/com/android/launcher3/tapl/Workspace.java
index af7e552..1d2c821 100644
--- a/tests/tapl/com/android/launcher3/tapl/Workspace.java
+++ b/tests/tapl/com/android/launcher3/tapl/Workspace.java
@@ -85,7 +85,8 @@
      */
     @NonNull
     public AllApps switchToAllApps() {
-        try (LauncherInstrumentation.Closable c =
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c =
                      mLauncher.addContextLayer("want to switch from workspace to all apps")) {
             verifyActiveContainer();
             final int deviceHeight = mLauncher.getDevice().getDisplayHeight();
@@ -156,21 +157,23 @@
      * second screen.
      */
     public void ensureWorkspaceIsScrollable() {
-        final UiObject2 workspace = verifyActiveContainer();
-        if (!isWorkspaceScrollable(workspace)) {
-            try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
-                    "dragging icon to a second page of workspace to make it scrollable")) {
-                dragIconToWorkspace(
-                        mLauncher,
-                        getHotseatAppIcon("Chrome"),
-                        new Point(mLauncher.getDevice().getDisplayWidth(),
-                                workspace.getVisibleBounds().centerY()),
-                        "deep_shortcuts_container");
-                verifyActiveContainer();
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+            final UiObject2 workspace = verifyActiveContainer();
+            if (!isWorkspaceScrollable(workspace)) {
+                try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                        "dragging icon to a second page of workspace to make it scrollable")) {
+                    dragIconToWorkspace(
+                            mLauncher,
+                            getHotseatAppIcon("Chrome"),
+                            new Point(mLauncher.getDevice().getDisplayWidth(),
+                                    workspace.getVisibleBounds().centerY()),
+                            "deep_shortcuts_container");
+                    verifyActiveContainer();
+                }
             }
+            assertTrue("Home screen workspace didn't become scrollable",
+                    isWorkspaceScrollable(workspace));
         }
-        assertTrue("Home screen workspace didn't become scrollable",
-                isWorkspaceScrollable(workspace));
     }
 
     private boolean isWorkspaceScrollable(UiObject2 workspace) {
@@ -213,11 +216,13 @@
      * recoil to complete.
      */
     public void flingForward() {
-        final UiObject2 workspace = verifyActiveContainer();
-        mLauncher.scroll(workspace, Direction.RIGHT,
-                new Rect(0, 0, mLauncher.getEdgeSensitivityWidth() + 1, 0),
-                FLING_STEPS, false);
-        verifyActiveContainer();
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+            final UiObject2 workspace = verifyActiveContainer();
+            mLauncher.scroll(workspace, Direction.RIGHT,
+                    new Rect(0, 0, mLauncher.getEdgeSensitivityWidth() + 1, 0),
+                    FLING_STEPS, false);
+            verifyActiveContainer();
+        }
     }
 
     /**
@@ -225,11 +230,13 @@
      * recoil to complete.
      */
     public void flingBackward() {
-        final UiObject2 workspace = verifyActiveContainer();
-        mLauncher.scroll(workspace, Direction.LEFT,
-                new Rect(mLauncher.getEdgeSensitivityWidth() + 1, 0, 0, 0),
-                FLING_STEPS, false);
-        verifyActiveContainer();
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+            final UiObject2 workspace = verifyActiveContainer();
+            mLauncher.scroll(workspace, Direction.LEFT,
+                    new Rect(mLauncher.getEdgeSensitivityWidth() + 1, 0, 0, 0),
+                    FLING_STEPS, false);
+            verifyActiveContainer();
+        }
     }
 
     /**
@@ -239,10 +246,12 @@
      */
     @NonNull
     public Widgets openAllWidgets() {
-        verifyActiveContainer();
-        mLauncher.getDevice().pressKeyCode(KeyEvent.KEYCODE_W, KeyEvent.META_CTRL_ON);
-        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer("pressed Ctrl+W")) {
-            return new Widgets(mLauncher);
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+            verifyActiveContainer();
+            mLauncher.getDevice().pressKeyCode(KeyEvent.KEYCODE_W, KeyEvent.META_CTRL_ON);
+            try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer("pressed Ctrl+W")) {
+                return new Widgets(mLauncher);
+            }
         }
     }