diff --git a/go/quickstep/res/layout/icon_recents_root_view.xml b/go/quickstep/res/layout/icon_recents_root_view.xml
index 122fadf..82d5890 100644
--- a/go/quickstep/res/layout/icon_recents_root_view.xml
+++ b/go/quickstep/res/layout/icon_recents_root_view.xml
@@ -14,11 +14,17 @@
      See the License for the specific language governing permissions and
      limitations under the License.
 -->
-<!-- TODO(114136250): Remove this temporary placeholder view for Go recents -->
-<TextView
+<com.android.quickstep.views.IconRecentsView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:gravity="center"
-    android:text="Stub!"
-    android:textSize="40sp"/>
\ No newline at end of file
+    android:gravity="center">
+    <!-- TODO(114136250): Remove this temporary placeholder view for Go recents -->
+    <TextView
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:text="Stub!"
+        android:textSize="40sp"/>
+</com.android.quickstep.views.IconRecentsView>
\ No newline at end of file
diff --git a/go/quickstep/src/com/android/launcher3/uioverrides/PortraitOverviewStateTouchHelper.java b/go/quickstep/src/com/android/launcher3/uioverrides/PortraitOverviewStateTouchHelper.java
new file mode 100644
index 0000000..a3b41b0
--- /dev/null
+++ b/go/quickstep/src/com/android/launcher3/uioverrides/PortraitOverviewStateTouchHelper.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.uioverrides;
+
+import android.view.MotionEvent;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.util.PendingAnimation;
+
+/**
+ * Helper class for {@link PortraitStatesTouchController} that determines swipeable regions and
+ * animations on the overview state that depend on the recents implementation.
+ */
+public final class PortraitOverviewStateTouchHelper {
+
+    public PortraitOverviewStateTouchHelper(Launcher launcher) {}
+
+    /**
+     * Whether or not {@link PortraitStatesTouchController} should intercept the touch when on the
+     * overview state.
+     *
+     * @param ev the motion event
+     * @return true if we should intercept the motion event
+     */
+    boolean canInterceptTouch(MotionEvent ev) {
+        // Go does not support swiping to all-apps from recents.
+        return false;
+    }
+
+    /**
+     * Whether or not swiping down to leave overview state should return to the currently running
+     * task app.
+     *
+     * @return true if going back should take the user to the currently running task
+     */
+    boolean shouldSwipeDownReturnToApp() {
+        // Go does not support swiping tasks down to launch tasks from recents.
+        return false;
+    }
+
+    /**
+     * Create the animation for going from overview to the task app via swiping.
+     *
+     * @param duration how long the animation should be
+     * @return the animation
+     */
+    PendingAnimation createSwipeDownToTaskAppAnimation(long duration) {
+        // Go does not support swiping tasks down to launch tasks from recents.
+        return null;
+    }
+}
diff --git a/go/quickstep/src/com/android/launcher3/uioverrides/RecentsUiFactory.java b/go/quickstep/src/com/android/launcher3/uioverrides/RecentsUiFactory.java
index f2c9455..d0c255c 100644
--- a/go/quickstep/src/com/android/launcher3/uioverrides/RecentsUiFactory.java
+++ b/go/quickstep/src/com/android/launcher3/uioverrides/RecentsUiFactory.java
@@ -23,9 +23,7 @@
 import android.view.View;
 
 import com.android.launcher3.Launcher;
-import com.android.launcher3.LauncherStateManager;
 import com.android.launcher3.LauncherStateManager.StateHandler;
-import com.android.launcher3.uioverrides.RecentsViewStateController;
 import com.android.launcher3.util.TouchController;
 
 /**
@@ -56,7 +54,6 @@
      * @return state handler for recents
      */
     public static StateHandler createRecentsViewStateController(Launcher launcher) {
-        //TODO Override RecentsViewStateController on low RAM.
         return new RecentsViewStateController(launcher);
     }
 
diff --git a/go/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java b/go/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java
new file mode 100644
index 0000000..f1cb75b
--- /dev/null
+++ b/go/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.uioverrides;
+
+import static com.android.quickstep.views.IconRecentsView.CONTENT_ALPHA;
+import static com.android.quickstep.views.IconRecentsView.TRANSLATION_Y_FACTOR;
+
+import android.util.FloatProperty;
+
+import androidx.annotation.NonNull;
+
+import com.android.launcher3.Launcher;
+import com.android.quickstep.views.IconRecentsView;
+
+/**
+ * State handler for Go's {@link IconRecentsView}.
+ */
+public final class RecentsViewStateController extends
+        BaseRecentsViewStateController<IconRecentsView> {
+
+    public RecentsViewStateController(@NonNull Launcher launcher) {
+        super(launcher);
+    }
+
+    @Override
+    FloatProperty<IconRecentsView> getTranslationYFactorProperty() {
+        return TRANSLATION_Y_FACTOR;
+    }
+
+    @Override
+    FloatProperty<IconRecentsView> getContentAlphaProperty() {
+        return CONTENT_ALPHA;
+    }
+}
diff --git a/go/quickstep/src/com/android/quickstep/views/IconRecentsView.java b/go/quickstep/src/com/android/quickstep/views/IconRecentsView.java
new file mode 100644
index 0000000..e4741e9
--- /dev/null
+++ b/go/quickstep/src/com/android/quickstep/views/IconRecentsView.java
@@ -0,0 +1,75 @@
+/*
+ * 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.views;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.util.FloatProperty;
+import android.view.ViewDebug;
+import android.widget.FrameLayout;
+
+/**
+ * Root view for the icon recents view.
+ */
+public final class IconRecentsView extends FrameLayout {
+
+    public static final FloatProperty<IconRecentsView> TRANSLATION_Y_FACTOR =
+            new FloatProperty<IconRecentsView>("translationYFactor") {
+
+                @Override
+                public void setValue(IconRecentsView view, float v) {
+                    view.setTranslationYFactor(v);
+                }
+
+                @Override
+                public Float get(IconRecentsView view) {
+                    return view.mTranslationYFactor;
+                }
+            };
+
+    public static final FloatProperty<IconRecentsView> CONTENT_ALPHA =
+            new FloatProperty<IconRecentsView>("contentAlpha") {
+                @Override
+                public void setValue(IconRecentsView view, float v) {
+                    ALPHA.set(view, v);
+                }
+
+                @Override
+                public Float get(IconRecentsView view) {
+                    return ALPHA.get(view);
+                }
+            };
+
+    /**
+     * A ratio representing the view's relative placement within its padded space. For example, 0
+     * is top aligned and 0.5 is centered vertically.
+     */
+    @ViewDebug.ExportedProperty(category = "launcher")
+    private float mTranslationYFactor;
+
+    public IconRecentsView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public void setTranslationYFactor(float translationFactor) {
+        mTranslationYFactor = translationFactor;
+        setTranslationY(computeTranslationYForFactor(mTranslationYFactor));
+    }
+
+    private float computeTranslationYForFactor(float translationYFactor) {
+        return translationYFactor * (getPaddingBottom() - getPaddingTop());
+    }
+}
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/PortraitOverviewStateTouchHelper.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/PortraitOverviewStateTouchHelper.java
new file mode 100644
index 0000000..eead4c8
--- /dev/null
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/PortraitOverviewStateTouchHelper.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.uioverrides;
+
+import static com.android.launcher3.uioverrides.PortraitStatesTouchController.isTouchOverHotseat;
+
+import android.view.MotionEvent;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.util.PendingAnimation;
+import com.android.quickstep.views.RecentsView;
+import com.android.quickstep.views.TaskView;
+
+/**
+ * Helper class for {@link PortraitStatesTouchController} that determines swipeable regions and
+ * animations on the overview state that depend on the recents implementation.
+ */
+public final class PortraitOverviewStateTouchHelper {
+
+    RecentsView mRecentsView;
+    Launcher mLauncher;
+
+    public PortraitOverviewStateTouchHelper(Launcher launcher) {
+        mLauncher = launcher;
+        mRecentsView = launcher.getOverviewPanel();
+    }
+
+    /**
+     * Whether or not {@link PortraitStatesTouchController} should intercept the touch when on the
+     * overview state.
+     *
+     * @param ev the motion event
+     * @return true if we should intercept the motion event
+     */
+    boolean canInterceptTouch(MotionEvent ev) {
+        if (mRecentsView.getChildCount() > 0) {
+            // Allow swiping up in the gap between the hotseat and overview.
+            return ev.getY() >= mRecentsView.getChildAt(0).getBottom();
+        } else {
+            // If there are no tasks, we only intercept if we're below the hotseat height.
+            return isTouchOverHotseat(mLauncher, ev);
+        }
+    }
+
+    /**
+     * Whether or not swiping down to leave overview state should return to the currently running
+     * task app.
+     *
+     * @return true if going back should take the user to the currently running task
+     */
+    boolean shouldSwipeDownReturnToApp() {
+        TaskView taskView = mRecentsView.getTaskViewAt(mRecentsView.getNextPage());
+        return taskView != null && mRecentsView.shouldSwipeDownLaunchApp();
+    }
+
+    /**
+     * Create the animation for going from overview to the task app via swiping. Should only be
+     * called when {@link #shouldSwipeDownReturnToApp()} returns true.
+     *
+     * @param duration how long the animation should be
+     * @return the animation
+     */
+    PendingAnimation createSwipeDownToTaskAppAnimation(long duration) {
+        TaskView taskView = mRecentsView.getTaskViewAt(mRecentsView.getNextPage());
+        if (taskView == null) {
+            throw new IllegalStateException("There is no task view to animate to.");
+        }
+        return mRecentsView.createTaskLauncherAnimation(taskView, duration);
+    }
+}
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/RecentsViewStateController.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/RecentsViewStateController.java
new file mode 100644
index 0000000..7d7946d
--- /dev/null
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/RecentsViewStateController.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.uioverrides;
+
+import static com.android.launcher3.LauncherState.FAST_OVERVIEW;
+import static com.android.launcher3.LauncherState.OVERVIEW;
+import static com.android.quickstep.QuickScrubController.QUICK_SCRUB_START_INTERPOLATOR;
+import static com.android.quickstep.QuickScrubController.QUICK_SCRUB_TRANSLATION_Y_FACTOR;
+import static com.android.quickstep.views.LauncherRecentsView.TRANSLATION_Y_FACTOR;
+import static com.android.quickstep.views.RecentsView.CONTENT_ALPHA;
+
+import android.animation.ValueAnimator;
+import android.annotation.TargetApi;
+import android.os.Build;
+import android.util.FloatProperty;
+import android.view.animation.Interpolator;
+
+import androidx.annotation.NonNull;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherState;
+import com.android.launcher3.LauncherStateManager.AnimationConfig;
+import com.android.launcher3.anim.AnimatorSetBuilder;
+import com.android.launcher3.anim.Interpolators;
+import com.android.quickstep.views.LauncherRecentsView;
+import com.android.quickstep.views.RecentsView;
+
+/**
+ * State handler for handling UI changes for {@link LauncherRecentsView}. In addition to managing
+ * the basic view properties, this class also manages changes in the task visuals.
+ */
+@TargetApi(Build.VERSION_CODES.O)
+public final class RecentsViewStateController extends
+        BaseRecentsViewStateController<LauncherRecentsView> {
+
+    public RecentsViewStateController(Launcher launcher) {
+        super(launcher);
+    }
+
+    @Override
+    public void setState(@NonNull LauncherState state) {
+        super.setState(state);
+        if (state.overviewUi) {
+            mRecentsView.updateEmptyMessage();
+            mRecentsView.resetTaskVisuals();
+        }
+    }
+
+    @Override
+    void setStateWithAnimationInternal(@NonNull final LauncherState toState,
+            @NonNull AnimatorSetBuilder builder, @NonNull AnimationConfig config) {
+        super.setStateWithAnimationInternal(toState, builder, config);
+
+        if (!toState.overviewUi) {
+            builder.addOnFinishRunnable(mRecentsView::resetTaskVisuals);
+        }
+
+        if (toState.overviewUi) {
+            ValueAnimator updateAnim = ValueAnimator.ofFloat(0, 1);
+            updateAnim.addUpdateListener(valueAnimator -> {
+                // While animating into recents, update the visible task data as needed
+                mRecentsView.loadVisibleTaskData();
+            });
+            updateAnim.setDuration(config.duration);
+            builder.play(updateAnim);
+            mRecentsView.updateEmptyMessage();
+        }
+    }
+
+    @Override
+    Interpolator getScaleAndTransYInterpolator(@NonNull LauncherState toState,
+            @NonNull AnimatorSetBuilder builder) {
+        if (mLauncher.getStateManager().getState() == OVERVIEW && toState == FAST_OVERVIEW) {
+            return Interpolators.clampToProgress(QUICK_SCRUB_START_INTERPOLATOR, 0,
+                    QUICK_SCRUB_TRANSLATION_Y_FACTOR);
+        }
+        return super.getScaleAndTransYInterpolator(toState, builder);
+    }
+
+    @Override
+    FloatProperty<LauncherRecentsView> getTranslationYFactorProperty() {
+        return TRANSLATION_Y_FACTOR;
+    }
+
+    @Override
+    FloatProperty<RecentsView> getContentAlphaProperty() {
+        return CONTENT_ALPHA;
+    }
+}
diff --git a/quickstep/res/drawable/bg_wellbeing_toast.xml b/quickstep/res/drawable/bg_wellbeing_toast.xml
new file mode 100644
index 0000000..22d6f8a
--- /dev/null
+++ b/quickstep/res/drawable/bg_wellbeing_toast.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- 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.
+-->
+<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+    <solid android:color="#E61A73E8" />
+    <corners android:radius="@dimen/task_corner_radius" />
+</shape>
\ No newline at end of file
diff --git a/quickstep/res/drawable/hourglass_bottom.xml b/quickstep/res/drawable/hourglass_bottom.xml
new file mode 100644
index 0000000..b5ef008
--- /dev/null
+++ b/quickstep/res/drawable/hourglass_bottom.xml
@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24"
+        android:viewportHeight="24">
+    <group>
+        <clip-path android:pathData="M0,0H24V24H0Z M 0,0"/>
+        <path
+            android:fillColor="#FFFFFFFF"
+            android:pathData="M6,2V8H6l4,4L6,16H6v6H18V16h0l-4,-4,4,-4h0V2Zm6,9.5,-4,-4V4h8V7.5Z"/>
+    </group>
+</vector>
diff --git a/quickstep/res/drawable/hourglass_top.xml b/quickstep/res/drawable/hourglass_top.xml
new file mode 100644
index 0000000..7fc77d3
--- /dev/null
+++ b/quickstep/res/drawable/hourglass_top.xml
@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24"
+        android:viewportHeight="24">
+    <group>
+        <clip-path android:pathData="M0,0H24V24H0Z M 0,0"/>
+        <path
+            android:fillColor="#FFFFFFFF"
+            android:pathData="M6,2V8H6l4,4L6,16H6v6H18V16h0l-4,-4,4,-4h0V2ZM16,16.5V20H8V16.5l4,-4Z"/>
+    </group>
+</vector>
diff --git a/quickstep/res/layout/task.xml b/quickstep/res/layout/task.xml
index 8f43192..f96a66f 100644
--- a/quickstep/res/layout/task.xml
+++ b/quickstep/res/layout/task.xml
@@ -38,12 +38,26 @@
     <com.android.quickstep.views.DigitalWellBeingToast
         android:id="@+id/digital_well_being_toast"
         android:layout_width="match_parent"
-        android:layout_height="100dp"
+        android:layout_height="48dp"
         android:importantForAccessibility="noHideDescendants"
-        android:background="#800000FF"
+        android:background="@drawable/bg_wellbeing_toast"
         android:layout_gravity="bottom"
         android:gravity="center"
-        android:textColor="@android:color/white"
-        android:visibility="gone"
+        android:visibility="gone">
+        <ImageView
+            android:id="@+id/digital_well_being_hourglass"
+            android:layout_width="24dp"
+            android:layout_height="24dp"
+            android:layout_marginEnd="8dp"
         />
+        <TextView
+            android:id="@+id/digital_well_being_remaining_time"
+            android:layout_width="wrap_content"
+            android:layout_height="24dp"
+            android:fontFamily="sans-serif"
+            android:textSize="14sp"
+            android:textColor="@android:color/white"
+            android:gravity="center_vertical"
+        />
+    </com.android.quickstep.views.DigitalWellBeingToast>
 </com.android.quickstep.views.TaskView>
\ No newline at end of file
diff --git a/quickstep/res/values/strings.xml b/quickstep/res/values/strings.xml
index 08132aa..7c47956 100644
--- a/quickstep/res/values/strings.xml
+++ b/quickstep/res/values/strings.xml
@@ -16,7 +16,7 @@
 * limitations under the License.
 */
 -->
-<resources>
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
 
     <!-- Application name -->
     <string name="derived_app_name" translatable="false">Quickstep</string>
@@ -46,4 +46,24 @@
 
     <!-- Accessibility title for the list of recent apps [CHAR_LIMIT=none] -->
     <string name="accessibility_recent_apps">Recent apps</string>
+
+    <!-- Accessibility title for an app card in Recents for apps that have time limit set
+     [CHAR_LIMIT=none] -->
+    <string name="task_contents_description_with_remaining_time"><xliff:g id="task_description" example="GMail">%1$s</xliff:g>, <xliff:g id="remaining_time" example="7 minutes left today">%2$s</xliff:g></string>
+
+    <!-- Text to show total app usage per day if it is less than 1 minute ("&lt;" is the
+     escaped form of '<'). [CHAR LIMIT=10] -->
+    <string name="shorter_duration_less_than_one_minute">&lt; 1 minute</string>
+
+    <!-- Annotation shown on an app card in Recents, telling that the app was switched to a
+    grayscale because it ran over its time limit [CHAR LIMIT=25] -->
+    <string name="app_in_grayscale">App in grayscale</string>
+
+    <!-- Annotation shown on an app card in Recents, telling that the app has a usage limit set by
+    the user, and a given time is left for it today [CHAR LIMIT=20] -->
+    <string name="time_left_for_app"><xliff:g id="time" example="7 minutes">%1$s</xliff:g> left today</string>
+
+    <!-- Annotation shown on an app card in Recents, telling that the app is in a group that has a
+    usage limit set by the user, and a given time is left for the group today [CHAR LIMIT=20] -->
+    <string name="time_left_for_group"><xliff:g id="time" example="1 hour">%1$s</xliff:g> left for group</string>
 </resources>
\ No newline at end of file
diff --git a/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java b/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java
index cb5152a..264ad5a 100644
--- a/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java
+++ b/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java
@@ -429,10 +429,7 @@
             mLauncher.getWorkspace().getPageIndicator().pauseAnimations();
             mDragLayer.setLayerType(View.LAYER_TYPE_HARDWARE, null);
 
-            endListener = () -> {
-                resetContentView();
-                mDragLayer.getScrim().hideSysUiScrim(false);
-            };
+            endListener = this::resetContentView;
         }
         return new Pair<>(launcherAnimator, endListener);
     }
@@ -877,6 +874,8 @@
             workspaceAnimator.setDuration(333);
             workspaceAnimator.setInterpolator(Interpolators.DEACCEL_1_7);
 
+            mDragLayer.getScrim().hideSysUiScrim(true);
+
             // Pause page indicator animations as they lead to layer trashing.
             mLauncher.getWorkspace().getPageIndicator().pauseAnimations();
             mDragLayer.setLayerType(View.LAYER_TYPE_HARDWARE, null);
@@ -896,6 +895,7 @@
         mDragLayerAlpha.setValue(1f);
         mDragLayer.setLayerType(View.LAYER_TYPE_NONE, null);
         mDragLayer.setTranslationY(0f);
+        mDragLayer.getScrim().hideSysUiScrim(false);
     }
 
     private boolean hasControlRemoteAppTransitionPermission() {
diff --git a/quickstep/src/com/android/launcher3/uioverrides/BaseRecentsViewStateController.java b/quickstep/src/com/android/launcher3/uioverrides/BaseRecentsViewStateController.java
new file mode 100644
index 0000000..df9dbe4
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/uioverrides/BaseRecentsViewStateController.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.uioverrides;
+
+import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
+import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_OVERVIEW_FADE;
+import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_OVERVIEW_SCALE;
+import static com.android.launcher3.anim.Interpolators.AGGRESSIVE_EASE_IN_OUT;
+import static com.android.launcher3.anim.Interpolators.LINEAR;
+
+import android.util.FloatProperty;
+import android.view.View;
+import android.view.animation.Interpolator;
+
+import androidx.annotation.NonNull;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherState;
+import com.android.launcher3.LauncherStateManager.AnimationConfig;
+import com.android.launcher3.LauncherStateManager.StateHandler;
+import com.android.launcher3.anim.AnimatorSetBuilder;
+import com.android.launcher3.anim.PropertySetter;
+
+/**
+ * State handler for recents view. Manages UI changes and animations for recents view based off the
+ * current {@link LauncherState}.
+ *
+ * @param <T> the recents view
+ */
+public abstract class BaseRecentsViewStateController<T extends View>
+        implements StateHandler {
+    protected final T mRecentsView;
+    protected final Launcher mLauncher;
+
+    public BaseRecentsViewStateController(@NonNull Launcher launcher) {
+        mLauncher = launcher;
+        mRecentsView = launcher.getOverviewPanel();
+    }
+
+    @Override
+    public void setState(@NonNull LauncherState state) {
+        float[] scaleTranslationYFactor = state.getOverviewScaleAndTranslationYFactor(mLauncher);
+        SCALE_PROPERTY.set(mRecentsView, scaleTranslationYFactor[0]);
+        getTranslationYFactorProperty().set(mRecentsView, scaleTranslationYFactor[1]);
+        getContentAlphaProperty().set(mRecentsView, state.overviewUi ? 1f : 0);
+    }
+
+    @Override
+    public final void setStateWithAnimation(@NonNull final LauncherState toState,
+            @NonNull AnimatorSetBuilder builder, @NonNull AnimationConfig config) {
+        if (!config.playAtomicComponent()) {
+            // The entire recents animation is played atomically.
+            return;
+        }
+        setStateWithAnimationInternal(toState, builder, config);
+    }
+
+    /**
+     * Core logic for animating the recents view UI.
+     *
+     * @param toState state to animate to
+     * @param builder animator set builder
+     * @param config current animation config
+     */
+    void setStateWithAnimationInternal(@NonNull final LauncherState toState,
+            @NonNull AnimatorSetBuilder builder, @NonNull AnimationConfig config) {
+        PropertySetter setter = config.getPropertySetter(builder);
+        float[] scaleTranslationYFactor = toState.getOverviewScaleAndTranslationYFactor(mLauncher);
+        Interpolator scaleAndTransYInterpolator = getScaleAndTransYInterpolator(toState, builder);
+        setter.setFloat(mRecentsView, SCALE_PROPERTY, scaleTranslationYFactor[0],
+                scaleAndTransYInterpolator);
+        setter.setFloat(mRecentsView, getTranslationYFactorProperty(), scaleTranslationYFactor[1],
+                scaleAndTransYInterpolator);
+        setter.setFloat(mRecentsView, getContentAlphaProperty(), toState.overviewUi ? 1 : 0,
+                builder.getInterpolator(ANIM_OVERVIEW_FADE, AGGRESSIVE_EASE_IN_OUT));
+    }
+
+    /**
+     * Get the interpolator to use for the scale and translation Y animation for the view.
+     *
+     * @param toState state to animate to
+     * @param builder animator set builder
+     * @return interpolator for scale and trans Y recents view animation
+     */
+    Interpolator getScaleAndTransYInterpolator(@NonNull final LauncherState toState,
+            @NonNull AnimatorSetBuilder builder) {
+        return builder.getInterpolator(ANIM_OVERVIEW_SCALE, LINEAR);
+    }
+
+    /**
+     * Get property for translation Y factor for the recents view.
+     *
+     * @return the float property for the recents view
+     */
+    abstract FloatProperty getTranslationYFactorProperty();
+
+    /**
+     * Get property for content alpha for the recents view.
+     *
+     * @return the float property for the view's content alpha
+     */
+    abstract FloatProperty getContentAlphaProperty();
+}
diff --git a/quickstep/src/com/android/launcher3/uioverrides/PortraitStatesTouchController.java b/quickstep/src/com/android/launcher3/uioverrides/PortraitStatesTouchController.java
index 330dc87..ea0e552 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/PortraitStatesTouchController.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/PortraitStatesTouchController.java
@@ -47,8 +47,6 @@
 import com.android.quickstep.RecentsModel;
 import com.android.quickstep.TouchInteractionService;
 import com.android.quickstep.util.LayoutUtils;
-import com.android.quickstep.views.RecentsView;
-import com.android.quickstep.views.TaskView;
 
 /**
  * Touch controller for handling various state transitions in portrait UI.
@@ -67,14 +65,16 @@
      */
     private static final float RECENTS_FADE_THRESHOLD = 0.88f;
 
+    private final PortraitOverviewStateTouchHelper mOverviewPortraitStateTouchHelper;
+
     private InterpolatorWrapper mAllAppsInterpolatorWrapper = new InterpolatorWrapper();
 
     // If true, we will finish the current animation instantly on second touch.
     private boolean mFinishFastOnSecondTouch;
 
-
     public PortraitStatesTouchController(Launcher l) {
         super(l, SwipeDetector.VERTICAL);
+        mOverviewPortraitStateTouchHelper = new PortraitOverviewStateTouchHelper(l);
     }
 
     @Override
@@ -98,22 +98,18 @@
             }
             return false;
         }
-        RecentsView recentsView = mLauncher.getOverviewPanel();
         if (mLauncher.isInState(ALL_APPS)) {
             // In all-apps only listen if the container cannot scroll itself
             if (!mLauncher.getAppsView().shouldContainerScroll(ev)) {
                 return false;
             }
-        } else if (mLauncher.isInState(OVERVIEW) && recentsView.getChildCount() > 0) {
-            // Allow swiping up in the gap between the hotseat and overview.
-            if (ev.getY() < recentsView.getChildAt(0).getBottom()) {
+        } else if (mLauncher.isInState(OVERVIEW)) {
+            if (!mOverviewPortraitStateTouchHelper.canInterceptTouch(ev)) {
                 return false;
             }
         } else {
             // For all other states, only listen if the event originated below the hotseat height
-            DeviceProfile dp = mLauncher.getDeviceProfile();
-            int hotseatHeight = dp.hotseatBarSizePx + dp.getInsets().bottom;
-            if (ev.getY() < (mLauncher.getDragLayer().getHeight() - hotseatHeight)) {
+            if (!isTouchOverHotseat(mLauncher, ev)) {
                 return false;
             }
         }
@@ -197,13 +193,12 @@
 
         cancelPendingAnim();
 
-        RecentsView recentsView = mLauncher.getOverviewPanel();
-        TaskView taskView = recentsView.getTaskViewAt(recentsView.getNextPage());
-        if (recentsView.shouldSwipeDownLaunchApp() && mFromState == OVERVIEW && mToState == NORMAL
-                && taskView != null) {
+        if (mFromState == OVERVIEW && mToState == NORMAL
+                && mOverviewPortraitStateTouchHelper.shouldSwipeDownReturnToApp()) {
             // Reset the state manager, when changing the interaction mode
             mLauncher.getStateManager().goToState(OVERVIEW, false /* animate */);
-            mPendingAnimation = recentsView.createTaskLauncherAnimation(taskView, maxAccuracy);
+            mPendingAnimation = mOverviewPortraitStateTouchHelper
+                    .createSwipeDownToTaskAppAnimation(maxAccuracy);
             mPendingAnimation.anim.setInterpolator(Interpolators.LINEAR);
 
             Runnable onCancelRunnable = () -> {
@@ -269,6 +264,19 @@
         }
     }
 
+    /**
+     * Whether the motion event is over the hotseat.
+     *
+     * @param launcher the launcher activity
+     * @param ev the event to check
+     * @return true if the event is over the hotseat
+     */
+    static boolean isTouchOverHotseat(Launcher launcher, MotionEvent ev) {
+        DeviceProfile dp = launcher.getDeviceProfile();
+        int hotseatHeight = dp.hotseatBarSizePx + dp.getInsets().bottom;
+        return (ev.getY() >= (launcher.getDragLayer().getHeight() - hotseatHeight));
+    }
+
     private static class InterpolatorWrapper implements Interpolator {
 
         public TimeInterpolator baseInterpolator = LINEAR;
diff --git a/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java b/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java
deleted file mode 100644
index abd2846..0000000
--- a/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.launcher3.uioverrides;
-
-import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
-import static com.android.launcher3.LauncherState.FAST_OVERVIEW;
-import static com.android.launcher3.LauncherState.OVERVIEW;
-import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_OVERVIEW_FADE;
-import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_OVERVIEW_SCALE;
-import static com.android.launcher3.anim.Interpolators.AGGRESSIVE_EASE_IN_OUT;
-import static com.android.launcher3.anim.Interpolators.LINEAR;
-import static com.android.quickstep.QuickScrubController.QUICK_SCRUB_START_INTERPOLATOR;
-import static com.android.quickstep.QuickScrubController.QUICK_SCRUB_TRANSLATION_Y_FACTOR;
-import static com.android.quickstep.views.LauncherRecentsView.TRANSLATION_Y_FACTOR;
-import static com.android.quickstep.views.RecentsView.CONTENT_ALPHA;
-
-import android.animation.ValueAnimator;
-import android.annotation.TargetApi;
-import android.os.Build;
-import android.view.animation.Interpolator;
-
-import com.android.launcher3.Launcher;
-import com.android.launcher3.LauncherState;
-import com.android.launcher3.LauncherStateManager.AnimationConfig;
-import com.android.launcher3.LauncherStateManager.StateHandler;
-import com.android.launcher3.anim.AnimatorSetBuilder;
-import com.android.launcher3.anim.Interpolators;
-import com.android.launcher3.anim.PropertySetter;
-import com.android.quickstep.views.LauncherRecentsView;
-
-@TargetApi(Build.VERSION_CODES.O)
-public class RecentsViewStateController implements StateHandler {
-
-    private final Launcher mLauncher;
-    private final LauncherRecentsView mRecentsView;
-
-    public RecentsViewStateController(Launcher launcher) {
-        mLauncher = launcher;
-        mRecentsView = launcher.getOverviewPanel();
-    }
-
-    @Override
-    public void setState(LauncherState state) {
-        mRecentsView.setContentAlpha(state.overviewUi ? 1 : 0);
-        float[] scaleTranslationYFactor = state.getOverviewScaleAndTranslationYFactor(mLauncher);
-        SCALE_PROPERTY.set(mRecentsView, scaleTranslationYFactor[0]);
-        mRecentsView.setTranslationYFactor(scaleTranslationYFactor[1]);
-        if (state.overviewUi) {
-            mRecentsView.updateEmptyMessage();
-            mRecentsView.resetTaskVisuals();
-        }
-    }
-
-    @Override
-    public void setStateWithAnimation(final LauncherState toState,
-            AnimatorSetBuilder builder, AnimationConfig config) {
-        if (!config.playAtomicComponent()) {
-            // The entire recents animation is played atomically.
-            return;
-        }
-        PropertySetter setter = config.getPropertySetter(builder);
-        float[] scaleTranslationYFactor = toState.getOverviewScaleAndTranslationYFactor(mLauncher);
-        Interpolator scaleAndTransYInterpolator = builder.getInterpolator(
-                ANIM_OVERVIEW_SCALE, LINEAR);
-        if (mLauncher.getStateManager().getState() == OVERVIEW && toState == FAST_OVERVIEW) {
-            scaleAndTransYInterpolator = Interpolators.clampToProgress(
-                    QUICK_SCRUB_START_INTERPOLATOR, 0, QUICK_SCRUB_TRANSLATION_Y_FACTOR);
-        }
-        setter.setFloat(mRecentsView, SCALE_PROPERTY, scaleTranslationYFactor[0],
-                scaleAndTransYInterpolator);
-        setter.setFloat(mRecentsView, TRANSLATION_Y_FACTOR, scaleTranslationYFactor[1],
-                scaleAndTransYInterpolator);
-        setter.setFloat(mRecentsView, CONTENT_ALPHA, toState.overviewUi ? 1 : 0,
-                builder.getInterpolator(ANIM_OVERVIEW_FADE, AGGRESSIVE_EASE_IN_OUT));
-
-        if (!toState.overviewUi) {
-            builder.addOnFinishRunnable(mRecentsView::resetTaskVisuals);
-        }
-
-        if (toState.overviewUi) {
-            ValueAnimator updateAnim = ValueAnimator.ofFloat(0, 1);
-            updateAnim.addUpdateListener(valueAnimator -> {
-                // While animating into recents, update the visible task data as needed
-                mRecentsView.loadVisibleTaskData();
-            });
-            updateAnim.setDuration(config.duration);
-            builder.play(updateAnim);
-            mRecentsView.updateEmptyMessage();
-        }
-    }
-}
diff --git a/quickstep/src/com/android/quickstep/ActivityControlHelper.java b/quickstep/src/com/android/quickstep/ActivityControlHelper.java
index 1678f06..c3df9c7 100644
--- a/quickstep/src/com/android/quickstep/ActivityControlHelper.java
+++ b/quickstep/src/com/android/quickstep/ActivityControlHelper.java
@@ -21,6 +21,7 @@
 import static com.android.launcher3.LauncherState.BACKGROUND_APP;
 import static com.android.launcher3.LauncherState.FAST_OVERVIEW;
 import static com.android.launcher3.LauncherState.OVERVIEW;
+import static com.android.launcher3.allapps.AllAppsTransitionController.ALL_APPS_PROGRESS_SPRING;
 import static com.android.launcher3.anim.Interpolators.LINEAR;
 import static com.android.launcher3.states.RotationHelper.REQUEST_LOCK;
 import static com.android.quickstep.TouchConsumer.INTERACTION_NORMAL;
@@ -295,7 +296,8 @@
 
             AnimatorSet anim = new AnimatorSet();
             if (!activity.getDeviceProfile().isVerticalBarLayout()) {
-                Animator shiftAnim = new SpringObjectAnimator(activity.getAllAppsController(),
+                Animator shiftAnim = new SpringObjectAnimator<>(activity.getAllAppsController(),
+                        ALL_APPS_PROGRESS_SPRING, "allAppsSpringFromACH",
                         activity.getAllAppsController().getShiftRange(),
                         fromState.getVerticalProgress(activity),
                         endState.getVerticalProgress(activity));
diff --git a/quickstep/src/com/android/quickstep/views/DigitalWellBeingToast.java b/quickstep/src/com/android/quickstep/views/DigitalWellBeingToast.java
index b34d2bf..aafd725 100644
--- a/quickstep/src/com/android/quickstep/views/DigitalWellBeingToast.java
+++ b/quickstep/src/com/android/quickstep/views/DigitalWellBeingToast.java
@@ -20,19 +20,33 @@
 import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.Intent;
+import android.content.pm.LauncherApps;
+import android.content.res.Resources;
+import android.icu.text.MeasureFormat;
+import android.icu.text.MeasureFormat.FormatWidth;
+import android.icu.util.Measure;
+import android.icu.util.MeasureUnit;
+import android.os.UserHandle;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.View;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
 import android.widget.TextView;
 
+import androidx.annotation.StringRes;
+
 import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.userevent.nano.LauncherLogProto;
 import com.android.systemui.shared.recents.model.Task;
 
-public final class DigitalWellBeingToast extends TextView {
+import java.lang.reflect.Method;
+import java.time.Duration;
+import java.util.Locale;
 
+public final class DigitalWellBeingToast extends LinearLayout {
     public interface InitializeCallback {
         void call(float saturation, String contentDescription);
     }
@@ -40,41 +54,144 @@
     private static final String TAG = DigitalWellBeingToast.class.getSimpleName();
 
     private Task mTask;
+    private ImageView mImage;
+    private TextView mText;
 
     public DigitalWellBeingToast(Context context, AttributeSet attrs) {
         super(context, attrs);
         setLayoutDirection(Utilities.isRtl(getResources()) ?
                 View.LAYOUT_DIRECTION_RTL : View.LAYOUT_DIRECTION_LTR);
         setOnClickListener((view) -> openAppUsageSettings());
+    }
 
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+
+        mText = findViewById(R.id.digital_well_being_remaining_time);
+        mImage = findViewById(R.id.digital_well_being_hourglass);
     }
 
     public void initialize(Task task, InitializeCallback callback) {
         mTask = task;
         Utilities.THREAD_POOL_EXECUTOR.execute(() -> {
-            final long appUsageLimitTimeMs = -1;
-            final long appRemainingTimeMs = -1;
-            final boolean isGroupLimit = true;
+            long appUsageLimitTimeMs = -1;
+            long appRemainingTimeMs = -1;
+            boolean isGroupLimit = true;
+
+            try {
+                final Method getAppUsageLimit = LauncherApps.class.getMethod(
+                        "getAppUsageLimit",
+                        String.class,
+                        UserHandle.class);
+                final Object usageLimit = getAppUsageLimit.invoke(
+                        getContext().getSystemService(LauncherApps.class),
+                        task.getTopComponent().getPackageName(),
+                        UserHandle.of(task.key.userId));
+
+                if (usageLimit != null) {
+                    final Class appUsageLimitClass = usageLimit.getClass();
+                    appUsageLimitTimeMs = (long) appUsageLimitClass.getMethod("getTotalUsageLimit").
+                            invoke(usageLimit);
+                    appRemainingTimeMs = (long) appUsageLimitClass.getMethod("getUsageRemaining").
+                            invoke(usageLimit);
+                    isGroupLimit = (boolean) appUsageLimitClass.getMethod("isGroupLimit").
+                            invoke(usageLimit);
+                }
+            } catch (Exception e) {
+                // Do nothing
+            }
+
+            final long appUsageLimitTimeMsFinal = appUsageLimitTimeMs;
+            final long appRemainingTimeMsFinal = appRemainingTimeMs;
+            final boolean isGroupLimitFinal = isGroupLimit;
+
             post(() -> {
-                if (appUsageLimitTimeMs < 0) {
+                if (appUsageLimitTimeMsFinal < 0) {
                     setVisibility(GONE);
                 } else {
                     setVisibility(VISIBLE);
-                    setText(getText(appRemainingTimeMs, isGroupLimit));
+                    mText.setText(getText(appRemainingTimeMsFinal, isGroupLimitFinal));
+                    mImage.setImageResource(appRemainingTimeMsFinal > 0 ?
+                            R.drawable.hourglass_top : R.drawable.hourglass_bottom);
                 }
 
                 callback.call(
-                        appUsageLimitTimeMs >= 0 && appRemainingTimeMs < 0 ? 0 : 1,
-                        getContentDescriptionForTask(task, appRemainingTimeMs, isGroupLimit));
+                        appUsageLimitTimeMsFinal >= 0 && appRemainingTimeMsFinal <= 0 ? 0 : 1,
+                        getContentDescriptionForTask(
+                                task, appUsageLimitTimeMsFinal,
+                                appRemainingTimeMsFinal,
+                                isGroupLimitFinal));
             });
         });
     }
 
-    public static String getText(long remainingTime, boolean isGroupLimit) {
-        return remainingTime < 0 ?
-                "Grayed" :
-                "Remaining time:" + (remainingTime + 59999) / 60000
-                        + " min " + (isGroupLimit ? "for group" : "for the app");
+    private String getReadableDuration(
+            Duration duration,
+            FormatWidth formatWidthHourAndMinute,
+            @StringRes int durationLessThanOneMinuteStringId,
+            boolean forceFormatWidth) {
+        int hours = Math.toIntExact(duration.toHours());
+        int minutes = Math.toIntExact(duration.minusHours(hours).toMinutes());
+
+        // Apply formatWidthHourAndMinute if both the hour part and the minute part are non-zero.
+        if (hours > 0 && minutes > 0) {
+            return MeasureFormat.getInstance(Locale.getDefault(), formatWidthHourAndMinute)
+                    .formatMeasures(
+                            new Measure(hours, MeasureUnit.HOUR),
+                            new Measure(minutes, MeasureUnit.MINUTE));
+        }
+
+        // Apply formatWidthHourOrMinute if only the hour part is non-zero (unless forced).
+        if (hours > 0) {
+            return MeasureFormat.getInstance(
+                    Locale.getDefault(),
+                    forceFormatWidth ? formatWidthHourAndMinute : FormatWidth.WIDE)
+                    .formatMeasures(new Measure(hours, MeasureUnit.HOUR));
+        }
+
+        // Apply formatWidthHourOrMinute if only the minute part is non-zero (unless forced).
+        if (minutes > 0) {
+            return MeasureFormat.getInstance(
+                    Locale.getDefault()
+                    , forceFormatWidth ? formatWidthHourAndMinute : FormatWidth.WIDE)
+                    .formatMeasures(new Measure(minutes, MeasureUnit.MINUTE));
+        }
+
+        // Use a specific string for usage less than one minute but non-zero.
+        if (duration.compareTo(Duration.ZERO) > 0) {
+            return getResources().getString(durationLessThanOneMinuteStringId);
+        }
+
+        // Otherwise, return 0-minute string.
+        return MeasureFormat.getInstance(
+                Locale.getDefault(), forceFormatWidth ? formatWidthHourAndMinute : FormatWidth.WIDE)
+                .formatMeasures(new Measure(0, MeasureUnit.MINUTE));
+    }
+
+    private String getReadableDuration(
+            Duration duration,
+            FormatWidth formatWidthHourAndMinute,
+            @StringRes int durationLessThanOneMinuteStringId) {
+        return getReadableDuration(
+                duration,
+                formatWidthHourAndMinute,
+                durationLessThanOneMinuteStringId,
+                /* forceFormatWidth= */ false);
+    }
+
+    private String getShorterReadableDuration(Duration duration) {
+        return getReadableDuration(
+                duration, FormatWidth.NARROW, R.string.shorter_duration_less_than_one_minute);
+    }
+
+    private String getText(long remainingTime, boolean isGroupLimit) {
+        final Resources resources = getResources();
+        return (remainingTime <= 0) ?
+                resources.getString(R.string.app_in_grayscale) :
+                resources.getString(
+                        isGroupLimit ? R.string.time_left_for_group : R.string.time_left_for_app,
+                        getShorterReadableDuration(Duration.ofMillis(remainingTime)));
     }
 
     public void openAppUsageSettings() {
@@ -97,8 +214,8 @@
     }
 
     private String getContentDescriptionForTask(
-            Task task, long appRemainingTimeMs, boolean isGroupLimit) {
-        return appRemainingTimeMs > 0 ?
+            Task task, long appUsageLimitTimeMs, long appRemainingTimeMs, boolean isGroupLimit) {
+        return appUsageLimitTimeMs >= 0 ?
                 getResources().getString(
                         R.string.task_contents_description_with_remaining_time,
                         task.titleDescription,
diff --git a/quickstep/src/com/android/quickstep/views/LauncherRecentsView.java b/quickstep/src/com/android/quickstep/views/LauncherRecentsView.java
index 7389d65..722c721 100644
--- a/quickstep/src/com/android/quickstep/views/LauncherRecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/LauncherRecentsView.java
@@ -67,6 +67,10 @@
                 }
             };
 
+    /**
+     * A ratio representing the view's relative placement within its padded space. For example, 0
+     * is top aligned and 0.5 is centered vertically.
+     */
     @ViewDebug.ExportedProperty(category = "launcher")
     private float mTranslationYFactor;
 
diff --git a/quickstep/tests/src/com/android/quickstep/TaplTests.java b/quickstep/tests/src/com/android/quickstep/TaplTests.java
index 6a1123e..347b7ac 100644
--- a/quickstep/tests/src/com/android/quickstep/TaplTests.java
+++ b/quickstep/tests/src/com/android/quickstep/TaplTests.java
@@ -104,7 +104,7 @@
 
         clearLauncherData();
 
-        mDevice.pressHome();
+        mLauncher.pressHome();
         waitForState("Launcher internal state didn't switch to Home", LauncherState.NORMAL);
         waitForResumed("Launcher internal state is still Background");
     }
@@ -424,7 +424,7 @@
         executeOnLauncher(launcher -> assertTrue("Flinging backward didn't scroll widgets",
                 getWidgetsScroll(launcher) < flingForwardY));
 
-        mDevice.pressHome();
+        mLauncher.pressHome();
         waitForLauncherCondition("Widgets were not closed",
                 launcher -> getWidgetsView(launcher) == null);
     }
diff --git a/res/values/strings.xml b/res/values/strings.xml
index a1089c6..51350c0 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -336,6 +336,4 @@
 
     <!-- Failed action error message: e.g. Failed: Pause -->
     <string name="remote_action_failed">Failed: <xliff:g id="what" example="Pause">%1$s</xliff:g></string>
-
-    <string name="task_contents_description_with_remaining_time" translatable="false"><xliff:g id="task_description" example="GMail">%1$s</xliff:g>, <xliff:g id="remaining_time" example="7 minutes">%2$s</xliff:g></string>
 </resources>
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 16909f0..b8b1181 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -1383,6 +1383,11 @@
     }
 
     private void setWorkspaceLoading(boolean value) {
+        if (com.android.launcher3.Utilities.IS_RUNNING_IN_TEST_HARNESS
+                && com.android.launcher3.Utilities.IS_DEBUG_DEVICE) {
+            android.util.Log.d("b/117332845", "setWorkspaceLoading " + value + " @ " +
+                    android.util.Log.getStackTraceString(new Throwable()));
+        }
         mWorkspaceLoading = value;
     }
 
diff --git a/src/com/android/launcher3/ProgressInterface.java b/src/com/android/launcher3/ProgressInterface.java
new file mode 100644
index 0000000..663d8ba
--- /dev/null
+++ b/src/com/android/launcher3/ProgressInterface.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3;
+
+/**
+ * Progress is defined as a value with range [0, 1], and is specific to each implementor.
+ * It is used when there is a transition from one state of the UI to another.
+ */
+public interface ProgressInterface {
+    void setProgress(float progress);
+    float getProgress();
+}
\ No newline at end of file
diff --git a/src/com/android/launcher3/allapps/AllAppsTransitionController.java b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
index 962c25b..e8e93fe 100644
--- a/src/com/android/launcher3/allapps/AllAppsTransitionController.java
+++ b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
@@ -23,17 +23,16 @@
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.LauncherStateManager.AnimationConfig;
 import com.android.launcher3.LauncherStateManager.StateHandler;
+import com.android.launcher3.ProgressInterface;
 import com.android.launcher3.R;
 import com.android.launcher3.anim.AnimationSuccessListener;
 import com.android.launcher3.anim.AnimatorSetBuilder;
 import com.android.launcher3.anim.SpringObjectAnimator;
 import com.android.launcher3.anim.PropertySetter;
-import com.android.launcher3.anim.SpringObjectAnimator.SpringProperty;
 import com.android.launcher3.util.Themes;
 import com.android.launcher3.views.ScrimView;
 
 import androidx.dynamicanimation.animation.FloatPropertyCompat;
-import androidx.dynamicanimation.animation.SpringAnimation;
 
 /**
  * Handles AllApps view transition.
@@ -45,7 +44,8 @@
  * If release velocity < THRES1, snap according to either top or bottom depending on whether it's
  * closer to top or closer to the page indicator.
  */
-public class AllAppsTransitionController implements StateHandler, OnDeviceProfileChangeListener {
+public class AllAppsTransitionController implements StateHandler, OnDeviceProfileChangeListener,
+        ProgressInterface {
 
     public static final Property<AllAppsTransitionController, Float> ALL_APPS_PROGRESS =
             new Property<AllAppsTransitionController, Float>(Float.class, "allAppsProgress") {
@@ -74,40 +74,6 @@
         }
     };
 
-    /**
-     * Property that either sets the progress directly or animates the progress via a spring.
-     */
-    public static class AllAppsSpringProperty extends
-            SpringProperty<AllAppsTransitionController, Float> {
-
-        SpringAnimation mSpring;
-        boolean useSpring = false;
-
-        public AllAppsSpringProperty(SpringAnimation spring) {
-            super(Float.class, "allAppsSpringProperty");
-            mSpring = spring;
-        }
-
-        @Override
-        public Float get(AllAppsTransitionController controller) {
-            return controller.getProgress();
-        }
-
-        @Override
-        public void set(AllAppsTransitionController controller, Float progress) {
-            if (useSpring) {
-                mSpring.animateToFinalPosition(progress);
-            } else {
-                controller.setProgress(progress);
-            }
-        }
-
-        @Override
-        public void switchToSpring() {
-            useSpring = true;
-        }
-    }
-
     private AllAppsContainerView mAppsView;
     private ScrimView mScrimView;
 
@@ -161,6 +127,7 @@
      * @see #setState(LauncherState)
      * @see #setStateWithAnimation(LauncherState, AnimatorSetBuilder, AnimationConfig)
      */
+    @Override
     public void setProgress(float progress) {
         mProgress = progress;
         mScrimView.setProgress(progress);
@@ -185,6 +152,7 @@
         }
     }
 
+    @Override
     public float getProgress() {
         return mProgress;
     }
@@ -223,8 +191,8 @@
         Interpolator interpolator = config.userControlled ? LINEAR : toState == OVERVIEW
                 ? builder.getInterpolator(ANIM_OVERVIEW_SCALE, FAST_OUT_SLOW_IN)
                 : FAST_OUT_SLOW_IN;
-        Animator anim = new SpringObjectAnimator(this, 1f / mShiftRange, mProgress,
-                targetProgress);
+        Animator anim = new SpringObjectAnimator<>(this, ALL_APPS_PROGRESS_SPRING,
+                "allAppsSpringFromAATC", 1f / mShiftRange, mProgress, targetProgress);
         anim.setDuration(config.duration);
         anim.setInterpolator(builder.getInterpolator(ANIM_VERTICAL_PROGRESS, interpolator));
         anim.addListener(getProgressAnimatorListener());
diff --git a/src/com/android/launcher3/anim/SpringObjectAnimator.java b/src/com/android/launcher3/anim/SpringObjectAnimator.java
index 4f037ef..4ece909 100644
--- a/src/com/android/launcher3/anim/SpringObjectAnimator.java
+++ b/src/com/android/launcher3/anim/SpringObjectAnimator.java
@@ -23,12 +23,12 @@
 import android.util.Log;
 import android.util.Property;
 
-import com.android.launcher3.allapps.AllAppsTransitionController;
-import com.android.launcher3.allapps.AllAppsTransitionController.AllAppsSpringProperty;
+import com.android.launcher3.ProgressInterface;
 
 import java.util.ArrayList;
 
 import androidx.dynamicanimation.animation.DynamicAnimation.OnAnimationEndListener;
+import androidx.dynamicanimation.animation.FloatPropertyCompat;
 import androidx.dynamicanimation.animation.SpringAnimation;
 import androidx.dynamicanimation.animation.SpringForce;
 
@@ -38,17 +38,17 @@
  * This animator allows for an object's property to be be controlled by an {@link ObjectAnimator} or
  * a {@link SpringAnimation}. It extends ValueAnimator so it can be used in an AnimatorSet.
  */
-public class SpringObjectAnimator extends ValueAnimator {
+public class SpringObjectAnimator<T extends ProgressInterface> extends ValueAnimator {
 
     private static final String TAG = "SpringObjectAnimator";
     private static boolean DEBUG = false;
 
-    private AllAppsTransitionController mObject;
+    private T mObject;
     private ObjectAnimator mObjectAnimator;
     private float[] mValues;
 
     private SpringAnimation mSpring;
-    private AllAppsSpringProperty mProperty;
+    private SpringProperty<T> mProperty;
 
     private ArrayList<AnimatorListener> mListeners;
     private boolean mSpringEnded = false;
@@ -58,16 +58,16 @@
     private static final float SPRING_DAMPING_RATIO = 0.9f;
     private static final float SPRING_STIFFNESS = 600f;
 
-    public SpringObjectAnimator(AllAppsTransitionController object, float minimumVisibleChange,
-            float... values) {
+    public SpringObjectAnimator(T object, FloatPropertyCompat<T> floatProperty,
+            String name, float minimumVisibleChange, float... values) {
         mObject = object;
-        mSpring = new SpringAnimation(object, AllAppsTransitionController.ALL_APPS_PROGRESS_SPRING);
+        mSpring = new SpringAnimation(object, floatProperty);
         mSpring.setMinimumVisibleChange(minimumVisibleChange);
         mSpring.setSpring(new SpringForce(0)
                 .setDampingRatio(SPRING_DAMPING_RATIO)
                 .setStiffness(SPRING_STIFFNESS));
         mSpring.setStartVelocity(0.01f);
-        mProperty = new AllAppsSpringProperty(mSpring);
+        mProperty = new SpringProperty<T>(name, mSpring);
         mObjectAnimator = ObjectAnimator.ofFloat(object, mProperty, values);
         mValues = values;
         mListeners = new ArrayList<>();
@@ -261,13 +261,32 @@
         mObjectAnimator.setCurrentPlayTime(playTime);
     }
 
-    public static abstract class SpringProperty<T, V> extends Property<T, V> {
+    public static class SpringProperty<T extends ProgressInterface> extends Property<T, Float> {
 
-        public SpringProperty(Class<V> type, String name) {
-            super(type, name);
+        boolean useSpring = false;
+        final SpringAnimation mSpring;
+
+        public SpringProperty(String name, SpringAnimation spring) {
+            super(Float.class, name);
+            mSpring = spring;
         }
 
-        abstract public void switchToSpring();
-    }
+        public void switchToSpring() {
+            useSpring = true;
+        }
 
+        @Override
+        public Float get(T object) {
+            return object.getProgress();
+        }
+
+        @Override
+        public void set(T object, Float progress) {
+            if (useSpring) {
+                mSpring.animateToFinalPosition(progress);
+            } else {
+                object.setProgress(progress);
+            }
+        }
+    }
 }
diff --git a/src/com/android/launcher3/compat/AlphabeticIndexCompat.java b/src/com/android/launcher3/compat/AlphabeticIndexCompat.java
index 84e82e3..a7c0a47 100644
--- a/src/com/android/launcher3/compat/AlphabeticIndexCompat.java
+++ b/src/com/android/launcher3/compat/AlphabeticIndexCompat.java
@@ -12,6 +12,8 @@
 import java.lang.reflect.Method;
 import java.util.Locale;
 
+import androidx.annotation.NonNull;
+
 public class AlphabeticIndexCompat {
     private static final String TAG = "AlphabeticIndexCompat";
 
@@ -53,7 +55,7 @@
     /**
      * Computes the section name for an given string {@param s}.
      */
-    public String computeSectionName(CharSequence cs) {
+    public String computeSectionName(@NonNull CharSequence cs) {
         String s = Utilities.trim(cs);
         String sectionName = mBaseIndex.getBucketLabel(mBaseIndex.getBucketIndex(s));
         if (Utilities.trim(sectionName).isEmpty() && s.length() > 0) {
@@ -89,7 +91,7 @@
         /**
          * Returns the index of the bucket in which the given string should appear.
          */
-        protected int getBucketIndex(String s) {
+        protected int getBucketIndex(@NonNull String s) {
             if (s.isEmpty()) {
                 return UNKNOWN_BUCKET_INDEX;
             }
diff --git a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
index e52fe66..837749d 100644
--- a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
+++ b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
@@ -21,6 +21,7 @@
 
 import android.annotation.TargetApi;
 import android.app.Fragment;
+import android.app.WallpaperManager;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.TypedArray;
@@ -29,6 +30,7 @@
 import android.graphics.Color;
 import android.graphics.Rect;
 import android.graphics.drawable.AdaptiveIconDrawable;
+import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.ColorDrawable;
 import android.os.Build;
 import android.os.Handler;
@@ -281,7 +283,6 @@
             // Additional measure for views which use auto text size API
             measureView(mRootView, mDp.widthPx, mDp.heightPx);
 
-            canvas.drawColor(Color.GRAY);
             mRootView.draw(canvas);
             dispatchVisibilityAggregated(mRootView, false);
         }
diff --git a/src/com/android/launcher3/util/RaceConditionTracker.java b/src/com/android/launcher3/util/RaceConditionTracker.java
index 8b06787..6954d0e 100644
--- a/src/com/android/launcher3/util/RaceConditionTracker.java
+++ b/src/com/android/launcher3/util/RaceConditionTracker.java
@@ -24,6 +24,8 @@
 public class RaceConditionTracker {
     public final static boolean ENTER = true;
     public final static boolean EXIT = false;
+    static final String ENTER_POSTFIX = "enter";
+    static final String EXIT_POSTFIX = "exit";
 
     public interface EventProcessor {
         void onEvent(String eventName);
@@ -46,7 +48,7 @@
     }
 
     public static String enterExitEvt(String eventName, boolean isEnter) {
-        return eventName + ":" + (isEnter ? "enter" : "exit");
+        return eventName + ":" + (isEnter ? ENTER_POSTFIX : EXIT_POSTFIX);
     }
 
     public static String enterEvt(String eventName) {
diff --git a/src_shortcuts_overrides/com/android/launcher3/model/WidgetsModel.java b/src_shortcuts_overrides/com/android/launcher3/model/WidgetsModel.java
index 9a17ec6..7a7f828 100644
--- a/src_shortcuts_overrides/com/android/launcher3/model/WidgetsModel.java
+++ b/src_shortcuts_overrides/com/android/launcher3/model/WidgetsModel.java
@@ -69,7 +69,8 @@
         WidgetItemComparator widgetComparator = new WidgetItemComparator();
         for (Map.Entry<PackageItemInfo, ArrayList<WidgetItem>> entry : mWidgetsList.entrySet()) {
             WidgetListRowEntry row = new WidgetListRowEntry(entry.getKey(), entry.getValue());
-            row.titleSectionName = indexer.computeSectionName(row.pkgItem.title);
+            row.titleSectionName = (row.pkgItem.title == null) ? "" :
+                    indexer.computeSectionName(row.pkgItem.title);
             Collections.sort(row.widgets, widgetComparator);
             result.add(row);
         }
diff --git a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
index 8c03e4b..1b34598 100644
--- a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
+++ b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
@@ -123,7 +123,7 @@
                 public void evaluate() throws Throwable {
                     try {
                         // Create launcher activity if necessary and bring it to the front.
-                        mDevice.pressHome();
+                        mLauncher.pressHome();
                         waitForLauncherCondition("Launcher activity wasn't created",
                                 launcher -> launcher != null);
 
diff --git a/tests/src/com/android/launcher3/ui/AllAppsIconToHomeTest.java b/tests/src/com/android/launcher3/ui/AllAppsIconToHomeTest.java
index 9354862..fdf87be 100644
--- a/tests/src/com/android/launcher3/ui/AllAppsIconToHomeTest.java
+++ b/tests/src/com/android/launcher3/ui/AllAppsIconToHomeTest.java
@@ -21,14 +21,12 @@
         LauncherActivityInfo settingsApp = getSettingsApp();
 
         clearHomescreen();
-        mDevice.pressHome();
-        mDevice.waitForIdle();
 
         final String appName = settingsApp.getLabel().toString();
         // 1. Open all apps and wait for load complete.
         // 2. Drag icon to homescreen.
         // 3. Verify that the icon works on homescreen.
-        mLauncher.getWorkspace().
+        mLauncher.pressHome().
                 switchToAllApps().
                 getAppIcon(appName).
                 dragToWorkspace().
diff --git a/tests/src/com/android/launcher3/util/RaceConditionReproducer.java b/tests/src/com/android/launcher3/util/RaceConditionReproducer.java
index 316e40d..0235f95 100644
--- a/tests/src/com/android/launcher3/util/RaceConditionReproducer.java
+++ b/tests/src/com/android/launcher3/util/RaceConditionReproducer.java
@@ -16,6 +16,9 @@
 
 package com.android.launcher3.util;
 
+import static com.android.launcher3.util.RaceConditionTracker.ENTER_POSTFIX;
+import static com.android.launcher3.util.RaceConditionTracker.EXIT_POSTFIX;
+
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
@@ -46,7 +49,7 @@
  * If an event A occurs before event B in the sequence, this is how execution order looks like:
  * Events: ... A ... B ...
  * Events and instructions, guaranteed order:
- *   (instructions executed prior to A) A ... B (instructions executed after B)
+ * (instructions executed prior to A) A ... B (instructions executed after B)
  *
  * Each iteration has 3 parts (phases).
  * Phase 1. Picking a previously seen event subsequence that we believe can have previously unseen
@@ -58,6 +61,8 @@
  * Phase 3. Releasing all threads and letting the test iteration run till its end.
  *
  * The iterations end when all seen paths have been declared “uncontinuable”.
+ *
+ * When we register event XXX:enter, we hold all other events until we register XXX:exit.
  */
 public class RaceConditionReproducer implements RaceConditionTracker.EventProcessor {
     private static final String TAG = "RaceConditionReproducer";
@@ -81,7 +86,7 @@
         private final Map<String, EventNode> mNextEvents = new HashMap<>();
         // Whether we believe that further iterations will not be able to add more events to
         // mNextEvents.
-        private boolean mStoppedAddingChildren = false;
+        private boolean mStoppedAddingChildren = true;
 
         private void debugDump(StringBuilder sb, int indent, String name) {
             for (int i = 0; i < indent; ++i) sb.append('.');
@@ -134,6 +139,8 @@
                 }
             }
             if (!mStoppedAddingChildren) {
+                // Mark that we have finished adding children. It will remain true if no new
+                // children are added, or will be set to false upon adding a new child.
                 mStoppedAddingChildren = true;
                 return true;
             }
@@ -216,6 +223,7 @@
         RaceConditionTracker.setEventProcessor(null);
         runResumeAllEventsCallbackLocked();
         assertTrue("Non-empty postponed events", mPostponedEvents.isEmpty());
+        assertTrue("Last registered event is :enter", lastEventAsEnter() == null);
 
         // No events came after mLastRegisteredEvent. It doesn't make sense to come to it again
         // because we won't see new continuations.
@@ -246,12 +254,36 @@
     }
 
     /**
+     * Returns whether the last event was not an XXX:enter, or this event is a matching XXX:exit.
+     */
+    private boolean canRegisterEventNowLocked(String event) {
+        final String lastEventAsEnter = lastEventAsEnter();
+        final String thisEventAsExit = eventAsExit(event);
+
+        if (lastEventAsEnter != null) {
+            if (!lastEventAsEnter.equals(thisEventAsExit)) {
+                assertTrue("YYY:exit after XXX:enter", thisEventAsExit == null);
+                // Last event was :enter, but this event is not :exit.
+                return false;
+            }
+        } else {
+            // Previous event was not :enter.
+            assertTrue(":exit after a non-enter event", thisEventAsExit == null);
+        }
+        return true;
+    }
+
+    /**
      * Registers an event issued by the app and returns null or decides that the event must be
      * postponed, and returns an object to wait on.
      */
     private synchronized Semaphore tryRegisterEvent(String event) {
         Log.d(TAG, "Event issued by the app: " + event);
 
+        if (!canRegisterEventNowLocked(event)) {
+            return createWaitObjectForPostponedEventLocked(event);
+        }
+
         if (mRegisteredEventCount < mSequenceToFollow.size()) {
             // We are in the first part of the iteration. We only register events that follow the
             // mSequenceToFollow and postponing all other events.
@@ -288,9 +320,14 @@
                 return createWaitObjectForPostponedEventLocked(event);
             }
         } else {
-            // The second phase of the iteration. We are past the growth point and register
+            // The third phase of the iteration. We are past the growth point and register
             // everything that comes.
             registerEventLocked(event);
+            // Register events that may have been postponed while waiting for an :exit event
+            // during the third phase. We don't do this if just registered event is :enter.
+            if (eventAsEnter(event) == null && mRegisteredEventCount > mSequenceToFollow.size()) {
+                registerPostponedEventsLocked(new HashSet<>(mPostponedEvents.keySet()));
+            }
         }
         return null;
     }
@@ -347,6 +384,11 @@
     private void registerPostponedEventsLocked(Collection<String> events) {
         for (String event : events) {
             registerPostponedEventLocked(event);
+            if (eventAsEnter(event) != null) {
+                // Once :enter is registered, switch to waiting for :exit to come. Won't register
+                // other postponed events.
+                break;
+            }
         }
     }
 
@@ -355,14 +397,51 @@
         registerEventLocked(event);
     }
 
+    /**
+     * If the last registered event was XXX:enter, returns XXX, otherwise, null.
+     */
+    private String lastEventAsEnter() {
+        return eventAsEnter(mCurrentSequence.substring(mCurrentSequence.lastIndexOf("|") + 1));
+    }
+
+    /**
+     * If the event is XXX:postfix, returns XXX, otherwise, null.
+     */
+    private static String prefixFromPostfixedEvent(String event, String postfix) {
+        final int columnPos = event.indexOf(':');
+        if (columnPos != -1 && postfix.equals(event.substring(columnPos + 1))) {
+            return event.substring(0, columnPos);
+        }
+        return null;
+    }
+
+    /**
+     * If the event is XXX:enter, returns XXX, otherwise, null.
+     */
+    private static String eventAsEnter(String event) {
+        return prefixFromPostfixedEvent(event, ENTER_POSTFIX);
+    }
+
+    /**
+     * If the event is XXX:exit, returns XXX, otherwise, null.
+     */
+    private static String eventAsExit(String event) {
+        return prefixFromPostfixedEvent(event, EXIT_POSTFIX);
+    }
+
     private void registerEventLocked(String event) {
+        assertTrue(canRegisterEventNowLocked(event));
+
         Log.d(TAG, "Actually registering event: " + event);
         EventNode next = mLastRegisteredEvent.mNextEvents.get(event);
         if (next == null) {
             // This event wasn't seen after mLastRegisteredEvent.
             next = new EventNode();
             mLastRegisteredEvent.mNextEvents.put(event, next);
-            mLastRegisteredEvent.mStoppedAddingChildren = false;
+            // The fact that we've added a new event after the previous one means that the
+            // previous event is still a growth point, unless this event is :exit, which means
+            // that the previous event is :enter.
+            mLastRegisteredEvent.mStoppedAddingChildren = eventAsExit(event) != null;
         }
 
         mLastRegisteredEvent = next;
@@ -371,12 +450,6 @@
         if (mCurrentSequence.length() > 0) mCurrentSequence.append("|");
         mCurrentSequence.append(event);
         Log.d(TAG, "Repro sequence: " + mCurrentSequence);
-
-        if (mRegisteredEventCount == mSequenceToFollow.size() + 1) {
-            // We just entered the third phase of the iteration, i.e. registered an event after
-            // the growth point. Now we can let go of all postponed events.
-            runResumeAllEventsCallbackLocked();
-        }
     }
 
     private void runResumeAllEventsCallbackLocked() {
diff --git a/tests/src/com/android/launcher3/util/RaceConditionReproducerTest.java b/tests/src/com/android/launcher3/util/RaceConditionReproducerTest.java
index 7dde5cc..3fc268e 100644
--- a/tests/src/com/android/launcher3/util/RaceConditionReproducerTest.java
+++ b/tests/src/com/android/launcher3/util/RaceConditionReproducerTest.java
@@ -77,6 +77,46 @@
     }
 
     @Test
+    @Ignore // The test is too long for continuous testing.
+    // 2 threads, 3 events, including enter-exit pairs each.
+    public void test3_3_enter_exit() throws Exception {
+        final RaceConditionReproducer eventProcessor = new RaceConditionReproducer();
+        boolean sawTheValidSequence = false;
+
+        for (; ; ) {
+            eventProcessor.startIteration();
+            Thread tb = new Thread(() -> {
+                RaceConditionTracker.onEvent("B1:enter");
+                RaceConditionTracker.onEvent("B1:exit");
+                RaceConditionTracker.onEvent("B2");
+                RaceConditionTracker.onEvent("B3:enter");
+                RaceConditionTracker.onEvent("B3:exit");
+            });
+            tb.start();
+
+            RaceConditionTracker.onEvent("A1");
+            RaceConditionTracker.onEvent("A2:enter");
+            RaceConditionTracker.onEvent("A2:exit");
+            RaceConditionTracker.onEvent("A3:enter");
+            RaceConditionTracker.onEvent("A3:exit");
+
+            tb.join();
+            final boolean needMoreIterations = eventProcessor.finishIteration();
+
+            sawTheValidSequence = sawTheValidSequence ||
+                    "B1:enter|B1:exit|A1|A2:enter|A2:exit|B2|A3:enter|A3:exit|B3:enter|B3:exit".
+                            equals(eventProcessor.getCurrentSequenceString());
+
+            if (!needMoreIterations) break;
+        }
+
+        assertEquals("Wrong number of leaf nodes",
+                factorial(3 + 3) / (factorial(3) * factorial(3)),
+                eventProcessor.numberOfLeafNodes());
+        assertTrue(sawTheValidSequence);
+    }
+
+    @Test
     // 2 threads, 3 events each; reproducing a particular event sequence.
     public void test3_3_ReproMode() throws Exception {
         final RaceConditionReproducer eventProcessor = new RaceConditionReproducer(
@@ -122,4 +162,42 @@
                 factorial(2 + 2 + 1) / (factorial(2) * factorial(2) * factorial(1)),
                 eventProcessor.numberOfLeafNodes());
     }
+
+    @Test
+    @Ignore // The test is too long for continuous testing.
+    // 2 threads with 2 events; 1 thread with 1 event. Includes enter-exit pairs.
+    public void test2_1_2_enter_exit() throws Exception {
+        final RaceConditionReproducer eventProcessor = new RaceConditionReproducer();
+
+        for (; ; ) {
+            eventProcessor.startIteration();
+            Thread tb = new Thread(() -> {
+                RaceConditionTracker.onEvent("B1:enter");
+                RaceConditionTracker.onEvent("B1:exit");
+                RaceConditionTracker.onEvent("B2:enter");
+                RaceConditionTracker.onEvent("B2:exit");
+            });
+            tb.start();
+
+            Thread tc = new Thread(() -> {
+                RaceConditionTracker.onEvent("C1:enter");
+                RaceConditionTracker.onEvent("C1:exit");
+            });
+            tc.start();
+
+            RaceConditionTracker.onEvent("A1:enter");
+            RaceConditionTracker.onEvent("A1:exit");
+            RaceConditionTracker.onEvent("A2:enter");
+            RaceConditionTracker.onEvent("A2:exit");
+
+            tb.join();
+            tc.join();
+
+            if (!eventProcessor.finishIteration()) break;
+        }
+
+        assertEquals("Wrong number of leaf nodes",
+                factorial(2 + 2 + 1) / (factorial(2) * factorial(2) * factorial(1)),
+                eventProcessor.numberOfLeafNodes());
+    }
 }
diff --git a/tests/tapl/com/android/launcher3/tapl/Background.java b/tests/tapl/com/android/launcher3/tapl/Background.java
index 27e0954..08d2889 100644
--- a/tests/tapl/com/android/launcher3/tapl/Background.java
+++ b/tests/tapl/com/android/launcher3/tapl/Background.java
@@ -64,7 +64,7 @@
 
             mLauncher.swipe(
                     navBar.getVisibleBounds().centerX(), navBar.getVisibleBounds().centerY(),
-                    navBar.getVisibleBounds().centerX(), height - 300);
+                    navBar.getVisibleBounds().centerX(), height - 400);
         } else {
             mLauncher.getSystemUiObject("recent_apps").click();
         }