diff --git a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
index 097609f..0f3474e 100644
--- a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
+++ b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
@@ -42,7 +42,6 @@
 import static com.android.launcher3.config.FeatureFlags.ENABLE_SCRIM_FOR_APP_LAUNCH;
 import static com.android.launcher3.config.FeatureFlags.KEYGUARD_ANIMATION;
 import static com.android.launcher3.config.FeatureFlags.SEPARATE_RECENTS_ACTIVITY;
-import static com.android.launcher3.dragndrop.DragLayer.ALPHA_INDEX_TRANSITIONS;
 import static com.android.launcher3.model.data.ItemInfo.NO_MATCHING_ID;
 import static com.android.launcher3.statehandlers.DepthController.DEPTH;
 import static com.android.launcher3.testing.TestProtocol.BAD_STATE;
@@ -105,7 +104,6 @@
 import com.android.launcher3.touch.PagedOrientationHandler;
 import com.android.launcher3.util.ActivityOptionsWrapper;
 import com.android.launcher3.util.DynamicResource;
-import com.android.launcher3.util.MultiValueAlpha.AlphaProperty;
 import com.android.launcher3.util.ObjectWrapper;
 import com.android.launcher3.util.RunnableList;
 import com.android.launcher3.util.Themes;
@@ -195,9 +193,7 @@
     private static final int WIDGET_CROSSFADE_DURATION_MILLIS = 125;
 
     protected final BaseQuickstepLauncher mLauncher;
-
     private final DragLayer mDragLayer;
-    private final AlphaProperty mDragLayerAlpha;
 
     final Handler mHandler;
 
@@ -241,7 +237,6 @@
     public QuickstepTransitionManager(Context context) {
         mLauncher = Launcher.cast(Launcher.getLauncher(context));
         mDragLayer = mLauncher.getDragLayer();
-        mDragLayerAlpha = mDragLayer.getAlphaProperty(ALPHA_INDEX_TRANSITIONS);
         mHandler = new Handler(Looper.getMainLooper());
         mDeviceProfile = mLauncher.getDeviceProfile();
         mBackAnimationController = new LauncherBackAnimationController(mLauncher, this);
diff --git a/quickstep/src/com/android/launcher3/taskbar/StashedHandleViewController.java b/quickstep/src/com/android/launcher3/taskbar/StashedHandleViewController.java
index a9ae7bd..b797807 100644
--- a/quickstep/src/com/android/launcher3/taskbar/StashedHandleViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/StashedHandleViewController.java
@@ -176,7 +176,8 @@
         return revealAnim;
     }
 
-    public void onIsStashed(boolean isStashed) {
+    /** Called when taskbar is stashed or unstashed. */
+    public void onIsStashedChanged(boolean isStashed) {
         mRegionSamplingHelper.setWindowVisible(isStashed);
         if (isStashed) {
             mStashedHandleView.updateSampledRegion(mStashedHandleBounds);
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index 9561b74..b349637 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -559,7 +559,7 @@
             }
         }
         mWindowLayoutParams.height = height;
-        mControllers.taskbarInsetsController.onTaskbarWindowHeightChanged();
+        mControllers.taskbarInsetsController.onTaskbarWindowHeightOrInsetsChanged();
         mWindowManager.updateViewLayout(mDragLayer, mWindowLayoutParams);
     }
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
index 5d3a152..ff08e3d 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
@@ -160,6 +160,7 @@
         taskbarForceVisibleImmersiveController.onDestroy();
         taskbarAllAppsController.onDestroy();
         navButtonController.onDestroy();
+        taskbarInsetsController.onDestroy();
 
         mControllersToLog = null;
     }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
index 089c26d..c1a6185 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
@@ -83,7 +83,6 @@
     private void onComputeTaskbarInsets(InsetsInfo insetsInfo) {
         if (mControllerCallbacks != null) {
             mControllerCallbacks.updateInsetsTouchability(insetsInfo);
-            mControllerCallbacks.updateContentInsets(insetsInfo.contentInsets);
         }
     }
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java
index 307f674..3e2695c 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java
@@ -164,16 +164,6 @@
         }
 
         /**
-         * Called to update the {@link InsetsInfo#contentInsets}. This is reported to apps but our
-         * internal launcher will ignore these insets.
-         */
-        public void updateContentInsets(Rect outContentInsets) {
-            int contentHeight = mControllers.taskbarStashController
-                    .getContentHeightToReportToApps();
-            outContentInsets.top = mTaskbarDragLayer.getHeight() - contentHeight;
-        }
-
-        /**
          * Called when a child is removed from TaskbarDragLayer.
          */
         public void onDragLayerViewRemoved() {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarInsetsController.kt b/quickstep/src/com/android/launcher3/taskbar/TaskbarInsetsController.kt
index a2ff780..9870a2e 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarInsetsController.kt
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarInsetsController.kt
@@ -18,6 +18,7 @@
 import android.graphics.Insets
 import android.view.WindowManager
 import com.android.launcher3.AbstractFloatingView
+import com.android.launcher3.AbstractFloatingView.TYPE_TASKBAR_ALL_APPS
 import com.android.launcher3.R
 import com.android.launcher3.anim.AlphaUpdateListener
 import com.android.launcher3.taskbar.TaskbarControllers.LoggableTaskbarController
@@ -53,20 +54,40 @@
             )
         )
 
+        windowLayoutParams.providedInternalInsets = arrayOfNulls<Insets>(ITYPE_SIZE)
         windowLayoutParams.providedInternalImeInsets = arrayOfNulls<Insets>(ITYPE_SIZE)
 
-        onTaskbarWindowHeightChanged()
+        onTaskbarWindowHeightOrInsetsChanged()
 
         windowLayoutParams.insetsRoundedCornerFrame = true
     }
 
-    fun onTaskbarWindowHeightChanged() {
-        val reducingSize = Insets.of(0, windowLayoutParams.height - taskbarHeightForIme, 0, 0)
+    fun onDestroy() {}
+
+    fun onTaskbarWindowHeightOrInsetsChanged() {
+        var reducingSize = getReducingInsetsForTaskbarInsetsHeight(
+            controllers.taskbarStashController.contentHeightToReportToApps)
+        windowLayoutParams.providedInternalInsets[ITYPE_EXTRA_NAVIGATION_BAR] = reducingSize
+        reducingSize = getReducingInsetsForTaskbarInsetsHeight(
+            controllers.taskbarStashController.tappableHeightToReportToApps)
+        windowLayoutParams.providedInternalInsets[ITYPE_BOTTOM_TAPPABLE_ELEMENT] = reducingSize
+
+        reducingSize = getReducingInsetsForTaskbarInsetsHeight(taskbarHeightForIme)
         windowLayoutParams.providedInternalImeInsets[ITYPE_EXTRA_NAVIGATION_BAR] = reducingSize
         windowLayoutParams.providedInternalImeInsets[ITYPE_BOTTOM_TAPPABLE_ELEMENT] = reducingSize
     }
 
     /**
+     * WindowLayoutParams.providedInternal*Insets expects Insets that subtract from the window frame
+     * height (i.e. WindowLayoutParams#height). So for Taskbar to report bottom insets to apps, it
+     * actually provides insets from the top of its window frame.
+     * @param height The number of pixels from the bottom of the screen that Taskbar insets.
+     */
+    private fun getReducingInsetsForTaskbarInsetsHeight(height: Int): Insets {
+        return Insets.of(0, windowLayoutParams.height - height, 0, 0)
+    }
+
+    /**
      * Called to update the touchable insets.
      * @see InsetsInfo.setTouchableInsets
      */
@@ -88,18 +109,11 @@
         } else if (controllers.taskbarDragController.isSystemDragInProgress) {
             // Let touches pass through us.
             insetsInfo.setTouchableInsets(InsetsInfo.TOUCHABLE_INSETS_REGION)
-        } else if (AbstractFloatingView.getOpenView<AbstractFloatingView?>(
-                context,
-                AbstractFloatingView.TYPE_TASKBAR_ALL_APPS
-            ) != null
-        ) {
+        } else if (AbstractFloatingView.hasOpenView(context, TYPE_TASKBAR_ALL_APPS)) {
             // Let touches pass through us.
             insetsInfo.setTouchableInsets(InsetsInfo.TOUCHABLE_INSETS_REGION)
         } else if (controllers.taskbarViewController.areIconsVisible()
-            || AbstractFloatingView.getOpenView<AbstractFloatingView?>(
-                context,
-                AbstractFloatingView.TYPE_ALL
-            ) != null
+            || AbstractFloatingView.hasOpenView(context, AbstractFloatingView.TYPE_ALL)
             || context.isNavBarKidsModeActive
         ) {
             // Taskbar has some touchable elements, take over the full taskbar area
@@ -120,6 +134,10 @@
     override fun dumpLogs(prefix: String, pw: PrintWriter) {
         pw.println(prefix + "TaskbarInsetsController:")
         pw.println("$prefix\twindowHeight=${windowLayoutParams.height}")
+        pw.println("$prefix\tprovidedInternalInsets[ITYPE_EXTRA_NAVIGATION_BAR]=" +
+                "${windowLayoutParams.providedInternalInsets[ITYPE_EXTRA_NAVIGATION_BAR]}")
+        pw.println("$prefix\tprovidedInternalInsets[ITYPE_BOTTOM_TAPPABLE_ELEMENT]=" +
+                "${windowLayoutParams.providedInternalInsets[ITYPE_BOTTOM_TAPPABLE_ELEMENT]}")
         pw.println("$prefix\tprovidedInternalImeInsets[ITYPE_EXTRA_NAVIGATION_BAR]=" +
                 "${windowLayoutParams.providedInternalImeInsets[ITYPE_EXTRA_NAVIGATION_BAR]}")
         pw.println("$prefix\tprovidedInternalImeInsets[ITYPE_BOTTOM_TAPPABLE_ELEMENT]=" +
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
index be67136..f34759d 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
@@ -30,6 +30,7 @@
 import android.content.SharedPreferences;
 import android.util.Log;
 import android.view.ViewConfiguration;
+import android.view.WindowInsets;
 
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Utilities;
@@ -280,6 +281,8 @@
 
     /**
      * Returns the height that taskbar will inset when inside apps.
+     * @see WindowInsets.Type#navigationBars()
+     * @see WindowInsets.Type#systemBars()
      */
     public int getContentHeightToReportToApps() {
         if (supportsVisualStashing() && hasAnyFlag(FLAGS_REPORT_STASHED_INSETS_TO_APP)) {
@@ -304,6 +307,15 @@
         return mUnstashedHeight;
     }
 
+    /**
+     * Returns the height that taskbar will inset when inside apps.
+     * @see WindowInsets.Type#tappableElement()
+     */
+    public int getTappableHeightToReportToApps() {
+        int contentHeight = getContentHeightToReportToApps();
+        return contentHeight <= mStashedHeight ? 0 : contentHeight;
+    }
+
     public int getStashedHeight() {
         return mStashedHeight;
     }
@@ -442,7 +454,7 @@
             @Override
             public void onAnimationStart(Animator animation) {
                 mIsStashed = isStashed;
-                onIsStashed(mIsStashed);
+                onIsStashedChanged(mIsStashed);
             }
 
             @Override
@@ -489,8 +501,11 @@
                 .setDuration(TASKBAR_HINT_STASH_DURATION).start();
     }
 
-    private void onIsStashed(boolean isStashed) {
-        mControllers.stashedHandleViewController.onIsStashed(isStashed);
+    private void onIsStashedChanged(boolean isStashed) {
+        mControllers.runAfterInit(() -> {
+            mControllers.stashedHandleViewController.onIsStashedChanged(isStashed);
+            mControllers.taskbarInsetsController.onTaskbarWindowHeightOrInsetsChanged();
+        });
     }
 
     public void applyState() {
diff --git a/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java b/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java
index 947d3e2..86f26c3 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java
@@ -107,7 +107,6 @@
      */
     private void handleSplitSelectionState(@NonNull LauncherState toState,
             @Nullable PendingAnimation builder) {
-        LauncherState currentState = mLauncher.getStateManager().getState();
         boolean animate = builder != null;
         PagedOrientationHandler orientationHandler =
                 ((RecentsView) mLauncher.getOverviewPanel()).getPagedOrientationHandler();
@@ -116,7 +115,7 @@
                         TASK_PRIMARY_SPLIT_TRANSLATION, TASK_SECONDARY_SPLIT_TRANSLATION,
                         mLauncher.getDeviceProfile());
 
-        if (isSplitSelectionState(currentState, toState)) {
+        if (toState == OVERVIEW_SPLIT_SELECT) {
             // Animation to "dismiss" selected taskView
             PendingAnimation splitSelectInitAnimation = mRecentsView.createSplitSelectInitAnimation(
                     toState.getTransitionDuration(mLauncher));
@@ -125,30 +124,18 @@
                     toState.getSplitSelectTranslation(mLauncher), LINEAR);
             splitSelectInitAnimation.setFloat(mRecentsView, taskViewsFloat.second, 0, LINEAR);
 
-            if (!animate && isSplitSelectionState(currentState, toState)) {
+            if (!animate) {
                 splitSelectInitAnimation.buildAnim().start();
-            } else if (animate &&
-                    isSplitSelectionState(currentState, toState)) {
+            } else {
                 builder.add(splitSelectInitAnimation.buildAnim());
             }
-        }
 
-        if (isSplitSelectionState(currentState, toState)) {
             mRecentsView.applySplitPrimaryScrollOffset();
         } else {
             mRecentsView.resetSplitPrimaryScrollOffset();
         }
     }
 
-    /**
-     * @return true if {@param toState} is {@link LauncherState#OVERVIEW_SPLIT_SELECT}
-     *          and {@param fromState} is not {@link LauncherState#OVERVIEW_SPLIT_SELECT}
-     */
-    private boolean isSplitSelectionState(@NonNull LauncherState fromState,
-            @NonNull LauncherState toState) {
-        return fromState != OVERVIEW_SPLIT_SELECT && toState == OVERVIEW_SPLIT_SELECT;
-    }
-
     private void setAlphas(PropertySetter propertySetter, StateAnimationConfig config,
             LauncherState state) {
         float clearAllButtonAlpha = state.areElementsVisible(mLauncher, CLEAR_ALL_BUTTON) ? 1 : 0;
diff --git a/quickstep/src/com/android/launcher3/uioverrides/touchcontrollers/NavBarToHomeTouchController.java b/quickstep/src/com/android/launcher3/uioverrides/touchcontrollers/NavBarToHomeTouchController.java
index 7bfb76a..34a6821 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/touchcontrollers/NavBarToHomeTouchController.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/touchcontrollers/NavBarToHomeTouchController.java
@@ -21,7 +21,8 @@
 import static com.android.launcher3.LauncherAnimUtils.newCancelListener;
 import static com.android.launcher3.LauncherState.ALL_APPS;
 import static com.android.launcher3.LauncherState.NORMAL;
-import static com.android.launcher3.allapps.AllAppsTransitionController.ALL_APPS_PULL_BACK_PROGRESS;
+import static com.android.launcher3.allapps.AllAppsTransitionController.ALL_APPS_PULL_BACK_ALPHA;
+import static com.android.launcher3.allapps.AllAppsTransitionController.ALL_APPS_PULL_BACK_TRANSLATION;
 import static com.android.launcher3.anim.AnimatorListeners.forSuccessCallback;
 import static com.android.launcher3.anim.Interpolators.DEACCEL_3;
 import static com.android.launcher3.config.FeatureFlags.ENABLE_ALL_APPS_EDU;
@@ -40,11 +41,9 @@
 import com.android.launcher3.Utilities;
 import com.android.launcher3.allapps.AllAppsTransitionController;
 import com.android.launcher3.anim.AnimatorPlaybackController;
-import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.compat.AccessibilityManagerCompat;
 import com.android.launcher3.config.FeatureFlags;
-import com.android.launcher3.states.StateAnimationConfig;
 import com.android.launcher3.touch.SingleAxisSwipeDetector;
 import com.android.launcher3.util.TouchController;
 import com.android.quickstep.TaskUtils;
@@ -148,16 +147,10 @@
             AbstractFloatingView.closeOpenContainer(mLauncher, AbstractFloatingView.TYPE_TASK_MENU);
         } else if (mStartState == ALL_APPS) {
             AllAppsTransitionController allAppsController = mLauncher.getAllAppsController();
-            builder.setFloat(allAppsController, ALL_APPS_PULL_BACK_PROGRESS,
-                    -mPullbackDistance / allAppsController.getShiftRange(), PULLBACK_INTERPOLATOR);
-
-            // Slightly fade out all apps content to further distinguish from scrolling.
-            StateAnimationConfig config = new StateAnimationConfig();
-            config.duration = accuracy;
-            config.setInterpolator(StateAnimationConfig.ANIM_ALL_APPS_FADE, Interpolators
-                    .mapToProgress(PULLBACK_INTERPOLATOR, 0, 0.5f));
-
-            allAppsController.setAlphas(mEndState, config, builder);
+            builder.setFloat(allAppsController, ALL_APPS_PULL_BACK_TRANSLATION,
+                    -mPullbackDistance, PULLBACK_INTERPOLATOR);
+            builder.setFloat(allAppsController, ALL_APPS_PULL_BACK_ALPHA,
+                    0.5f, PULLBACK_INTERPOLATOR);
         }
         AbstractFloatingView topView = AbstractFloatingView.getTopOpenView(mLauncher);
         if (topView != null) {
diff --git a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
index b073b90..b90e820 100644
--- a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
+++ b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
@@ -1013,19 +1013,19 @@
             return RECENTS;
         }
         final GestureEndTarget endTarget;
-        final boolean goingToNewTask;
+        final boolean canGoToNewTask;
         if (mRecentsView != null) {
             if (!hasTargets()) {
                 // If there are no running tasks, then we can assume that this is a continuation of
                 // the last gesture, but after the recents animation has finished
-                goingToNewTask = true;
+                canGoToNewTask = true;
             } else {
                 final int runningTaskIndex = mRecentsView.getRunningTaskIndex();
                 final int taskToLaunch = mRecentsView.getNextPage();
-                goingToNewTask = runningTaskIndex >= 0 && taskToLaunch != runningTaskIndex;
+                canGoToNewTask = runningTaskIndex >= 0 && taskToLaunch != runningTaskIndex;
             }
         } else {
-            goingToNewTask = false;
+            canGoToNewTask = false;
         }
         final boolean reachedOverviewThreshold = mCurrentShift.value >= MIN_PROGRESS_FOR_OVERVIEW;
         final boolean isFlingX = Math.abs(velocity.x) > mContext.getResources()
@@ -1034,13 +1034,13 @@
             if (isCancel) {
                 endTarget = LAST_TASK;
             } else if (mDeviceState.isFullyGesturalNavMode()) {
-                if (goingToNewTask && isFlingX) {
+                if (canGoToNewTask && isFlingX) {
                     // Flinging towards new task takes precedence over mIsMotionPaused (which only
                     // checks y-velocity).
                     endTarget = NEW_TASK;
                 } else if (mIsMotionPaused) {
                     endTarget = RECENTS;
-                } else if (goingToNewTask) {
+                } else if (canGoToNewTask) {
                     endTarget = NEW_TASK;
                 } else {
                     endTarget = !reachedOverviewThreshold ? LAST_TASK : HOME;
@@ -1048,26 +1048,22 @@
             } else {
                 endTarget = reachedOverviewThreshold && mGestureStarted
                         ? RECENTS
-                        : goingToNewTask
+                        : canGoToNewTask
                                 ? NEW_TASK
                                 : LAST_TASK;
             }
         } else {
             // If swiping at a diagonal, base end target on the faster velocity.
             boolean isSwipeUp = endVelocity < 0;
-            boolean willGoToNewTaskOnSwipeUp =
-                    goingToNewTask && Math.abs(velocity.x) > Math.abs(endVelocity);
+            boolean willGoToNewTask =
+                    canGoToNewTask && Math.abs(velocity.x) > Math.abs(endVelocity);
 
-            if (mDeviceState.isFullyGesturalNavMode() && isSwipeUp && !willGoToNewTaskOnSwipeUp) {
-                endTarget = HOME;
-            } else if (mDeviceState.isFullyGesturalNavMode() && isSwipeUp) {
-                // If swiping at a diagonal, base end target on the faster velocity.
-                endTarget = NEW_TASK;
+            if (mDeviceState.isFullyGesturalNavMode() && isSwipeUp) {
+                endTarget = willGoToNewTask ? NEW_TASK : HOME;
             } else if (isSwipeUp) {
-                endTarget = !reachedOverviewThreshold && willGoToNewTaskOnSwipeUp
-                        ? NEW_TASK : RECENTS;
+                endTarget = (!reachedOverviewThreshold && willGoToNewTask) ? NEW_TASK : RECENTS;
             } else {
-                endTarget = goingToNewTask ? NEW_TASK : LAST_TASK;
+                endTarget = willGoToNewTask ? NEW_TASK : LAST_TASK; // Swipe is downward.
             }
         }
 
@@ -1145,6 +1141,8 @@
                     duration = Math.max(duration, mRecentsView.getScroller().getDuration());
                 }
             }
+        } else if (endTarget == LAST_TASK && mRecentsView != null) {
+            mRecentsView.snapToPage(mRecentsView.getCurrentPage(), Math.toIntExact(duration));
         }
 
         // Let RecentsView handle the scrolling to the task, which we launch in startNewTask()
diff --git a/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialController.java b/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialController.java
index b686505..9ba5577 100644
--- a/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialController.java
+++ b/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialController.java
@@ -117,7 +117,22 @@
                 mTutorialFragment.closeTutorial();
             }
         } else if (mTutorialType == BACK_NAVIGATION) {
-            showFeedback(R.string.back_gesture_feedback_swipe_in_nav_bar);
+            switch (result) {
+                case HOME_NOT_STARTED_TOO_FAR_FROM_EDGE:
+                case OVERVIEW_NOT_STARTED_TOO_FAR_FROM_EDGE:
+                case HOME_OR_OVERVIEW_CANCELLED:
+                    showFeedback(R.string.back_gesture_feedback_swipe_too_far_from_edge);
+                    break;
+                case HOME_GESTURE_COMPLETED:
+                case OVERVIEW_GESTURE_COMPLETED:
+                case HOME_OR_OVERVIEW_NOT_STARTED_WRONG_SWIPE_DIRECTION:
+                case ASSISTANT_COMPLETED:
+                case ASSISTANT_NOT_STARTED_BAD_ANGLE:
+                case ASSISTANT_NOT_STARTED_SWIPE_TOO_SHORT:
+                default:
+                    showFeedback(R.string.back_gesture_feedback_swipe_in_nav_bar);
+
+            }
         }
     }
 }
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index 5f715f8..49bf827 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -1396,6 +1396,9 @@
         if (taskGroups == null || taskGroups.isEmpty()) {
             removeTasksViewsAndClearAllButton();
             onTaskStackUpdated();
+            // With all tasks removed, touch handling in PagedView is disabled and we need to reset
+            // touch state or otherwise values will be obsolete.
+            resetTouchState();
             return;
         }
 
diff --git a/src/com/android/launcher3/AbstractFloatingView.java b/src/com/android/launcher3/AbstractFloatingView.java
index 4386f41..90869c2 100644
--- a/src/com/android/launcher3/AbstractFloatingView.java
+++ b/src/com/android/launcher3/AbstractFloatingView.java
@@ -208,6 +208,13 @@
     }
 
     /**
+     * Returns whether there is at least one view of the given type where {@link #isOpen()} == true.
+     */
+    public static boolean hasOpenView(ActivityContext activity, @FloatingViewType int type) {
+        return getOpenView(activity, type) != null;
+    }
+
+    /**
      * Returns a view matching FloatingViewType, and {@link #isOpen()} may be false (if animating
      * closed).
      */
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index b6a05b0..4b42ecb 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -42,7 +42,6 @@
 import static com.android.launcher3.LauncherState.SPRING_LOADED;
 import static com.android.launcher3.Utilities.postAsyncCallback;
 import static com.android.launcher3.accessibility.LauncherAccessibilityDelegate.getSupportedActions;
-import static com.android.launcher3.dragndrop.DragLayer.ALPHA_INDEX_LAUNCHER_LOAD;
 import static com.android.launcher3.logging.StatsLogManager.EventEnum;
 import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_BACKGROUND;
 import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_HOME;
@@ -65,7 +64,6 @@
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
-import android.animation.ObjectAnimator;
 import android.animation.ValueAnimator;
 import android.annotation.TargetApi;
 import android.app.Notification;
@@ -109,7 +107,7 @@
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
-import android.view.ViewTreeObserver;
+import android.view.ViewTreeObserver.OnPreDrawListener;
 import android.view.WindowManager.LayoutParams;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.animation.OvershootInterpolator;
@@ -130,7 +128,6 @@
 import com.android.launcher3.allapps.AllAppsTransitionController;
 import com.android.launcher3.allapps.BaseAllAppsContainerView;
 import com.android.launcher3.allapps.DiscoveryBounce;
-import com.android.launcher3.anim.AnimatorListeners;
 import com.android.launcher3.anim.PropertyListBuilder;
 import com.android.launcher3.compat.AccessibilityManagerCompat;
 import com.android.launcher3.config.FeatureFlags;
@@ -186,8 +183,6 @@
 import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.ItemInfoMatcher;
-import com.android.launcher3.util.MultiValueAlpha;
-import com.android.launcher3.util.MultiValueAlpha.AlphaProperty;
 import com.android.launcher3.util.OnboardingPrefs;
 import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.PackageUserKey;
@@ -341,6 +336,7 @@
     private Runnable mOnDeferredActivityLaunchCallback;
 
     private ViewOnDrawExecutor mPendingExecutor;
+    private OnPreDrawListener mOnInitialBindListener;
 
     private LauncherModel mModel;
     private ModelWriter mModelWriter;
@@ -503,11 +499,10 @@
 
         if (!mModel.addCallbacksAndLoad(this)) {
             if (!internalStateHandled) {
-                Log.d(BAD_STATE, "Launcher onCreate not binding sync, setting DragLayer alpha "
-                        + "ALPHA_INDEX_LAUNCHER_LOAD to 0");
-                // If we are not binding synchronously, show a fade in animation when
-                // the first page bind completes.
-                mDragLayer.getAlphaProperty(ALPHA_INDEX_LAUNCHER_LOAD).setValue(0);
+                Log.d(BAD_STATE, "Launcher onCreate not binding sync, prevent drawing");
+                // If we are not binding synchronously, pause drawing until initial bind complete,
+                // so that the system could continue to show the device loading prompt
+                mOnInitialBindListener = Boolean.FALSE::booleanValue;
             }
         }
 
@@ -515,25 +510,9 @@
         setDefaultKeyMode(DEFAULT_KEYS_SEARCH_LOCAL);
 
         setContentView(getRootView());
-        getRootView().getViewTreeObserver().addOnPreDrawListener(
-                new ViewTreeObserver.OnPreDrawListener() {
-                    @Override
-                    public boolean onPreDraw() {
-                        // Checks the status of fade in animation.
-                        final AlphaProperty property =
-                                mDragLayer.getAlphaProperty(ALPHA_INDEX_LAUNCHER_LOAD);
-                        if (property.getValue() == 0) {
-                            Log.d(BAD_STATE, "Launcher onPreDraw ALPHA_INDEX_LAUNCHER_LOAD not"
-                                    + " started yet, cancelling draw.");
-                            // Animation haven't started yet; suspend.
-                            return false;
-                        } else {
-                            // The animation is started; start drawing.
-                            getRootView().getViewTreeObserver().removeOnPreDrawListener(this);
-                            return true;
-                        }
-                    }
-                });
+        if (mOnInitialBindListener != null) {
+            getRootView().getViewTreeObserver().addOnPreDrawListener(mOnInitialBindListener);
+        }
         getRootView().dispatchInsets();
 
         // Listen for broadcasts
@@ -2692,36 +2671,12 @@
                     AllAppsStore.DEFER_UPDATES_NEXT_DRAW));
         }
 
-        AlphaProperty property = mDragLayer.getAlphaProperty(ALPHA_INDEX_LAUNCHER_LOAD);
-        if (property.getValue() < 1) {
-            ObjectAnimator anim = ObjectAnimator.ofFloat(property, MultiValueAlpha.VALUE, 1);
-
-            Log.d(BAD_STATE, "Launcher onInitialBindComplete toAlpha=" + 1);
-            anim.addListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationStart(Animator animation) {
-                    Log.d(BAD_STATE, "Launcher onInitialBindComplete onStart");
-                }
-
-                @Override
-                public void onAnimationCancel(Animator animation) {
-                    float alpha = mDragLayer == null
-                            ? -1
-                            : mDragLayer.getAlphaProperty(ALPHA_INDEX_LAUNCHER_LOAD).getValue();
-                    Log.d(BAD_STATE, "Launcher onInitialBindComplete onCancel, alpha=" + alpha);
-                }
-
-                @Override
-                public void onAnimationEnd(Animator animation) {
-                    Log.d(BAD_STATE, "Launcher onInitialBindComplete onEnd");
-                }
-            });
-
-            anim.addListener(AnimatorListeners.forEndCallback(executor::onLoadAnimationCompleted));
-            anim.start();
-        } else {
-            executor.onLoadAnimationCompleted();
+        if (mOnInitialBindListener != null) {
+            getRootView().getViewTreeObserver().removeOnPreDrawListener(mOnInitialBindListener);
+            mOnInitialBindListener = null;
         }
+
+        executor.onLoadAnimationCompleted();
         executor.attachTo(this);
         if (Utilities.ATLEAST_S) {
             Trace.endAsyncSection(DISPLAY_WORKSPACE_TRACE_METHOD_NAME,
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index f5ac359..0a1d25c 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -1440,7 +1440,7 @@
         return Math.abs(velocity) > threshold;
     }
 
-    private void resetTouchState() {
+    protected void resetTouchState() {
         releaseVelocityTracker();
         mIsBeingDragged = false;
         mActivePointerId = INVALID_POINTER;
diff --git a/src/com/android/launcher3/allapps/AllAppsTransitionController.java b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
index 8662d00..637a418 100644
--- a/src/com/android/launcher3/allapps/AllAppsTransitionController.java
+++ b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
@@ -44,6 +44,8 @@
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.statemanager.StateManager.StateHandler;
 import com.android.launcher3.states.StateAnimationConfig;
+import com.android.launcher3.util.MultiAdditivePropertyFactory;
+import com.android.launcher3.util.MultiValueAlpha;
 import com.android.launcher3.util.UiThreadHelper;
 import com.android.launcher3.views.ScrimView;
 
@@ -76,20 +78,56 @@
                 }
             };
 
-    public static final FloatProperty<AllAppsTransitionController> ALL_APPS_PULL_BACK_PROGRESS =
-            new FloatProperty<AllAppsTransitionController>("allAppsPullBackProgress") {
+    public static final FloatProperty<AllAppsTransitionController> ALL_APPS_PULL_BACK_TRANSLATION =
+            new FloatProperty<AllAppsTransitionController>("allAppsPullBackTranslation") {
 
                 @Override
                 public Float get(AllAppsTransitionController controller) {
-                    return controller.mPullBackProgress;
+                    if (controller.mIsTablet) {
+                        return controller.mAppsView.getRecyclerViewContainer().getTranslationY();
+                    } else {
+                        return controller.getAppsViewPullbackTranslationY().get(
+                                controller.mAppsView);
+                    }
                 }
 
                 @Override
-                public void setValue(AllAppsTransitionController controller, float progress) {
-                    controller.setPullBackProgress(progress);
+                public void setValue(AllAppsTransitionController controller, float translation) {
+                    if (controller.mIsTablet) {
+                        controller.mAppsView.getRecyclerViewContainer().setTranslationY(
+                                translation);
+                    } else {
+                        controller.getAppsViewPullbackTranslationY().set(controller.mAppsView,
+                                translation);
+                    }
                 }
             };
 
+    public static final FloatProperty<AllAppsTransitionController> ALL_APPS_PULL_BACK_ALPHA =
+            new FloatProperty<AllAppsTransitionController>("allAppsPullBackAlpha") {
+
+                @Override
+                public Float get(AllAppsTransitionController controller) {
+                    if (controller.mIsTablet) {
+                        return controller.mAppsView.getRecyclerViewContainer().getAlpha();
+                    } else {
+                        return controller.getAppsViewPullbackAlpha().getValue();
+                    }
+                }
+
+                @Override
+                public void setValue(AllAppsTransitionController controller, float alpha) {
+                    if (controller.mIsTablet) {
+                        controller.mAppsView.getRecyclerViewContainer().setAlpha(alpha);
+                    } else {
+                        controller.getAppsViewPullbackAlpha().setValue(alpha);
+                    }
+                }
+            };
+
+    private static final int INDEX_APPS_VIEW_PROGRESS = 0;
+    private static final int INDEX_APPS_VIEW_PULLBACK = 1;
+    private static final int APPS_VIEW_INDEX_COUNT = 2;
 
     private ActivityAllAppsContainerView<Launcher> mAppsView;
 
@@ -104,18 +142,23 @@
     // When {@link mProgress} is 1, all apps container is pulled down.
     private float mShiftRange;      // changes depending on the orientation
     private float mProgress;        // [0, 1], mShiftRange * mProgress = shiftCurrent
-    private float mPullBackProgress;  // [0, 1], mShiftRange * mPullBackProgress = shiftCurrent
 
     private ScrimView mScrimView;
-    private View mPullBackView;
+
+    private final MultiAdditivePropertyFactory<View>
+            mAppsViewTranslationYPropertyFactory = new MultiAdditivePropertyFactory<>(
+            "appsViewTranslationY", View.TRANSLATION_Y);
+    private MultiValueAlpha mAppsViewAlpha;
+
+    private boolean mIsTablet;
 
     public AllAppsTransitionController(Launcher l) {
         mLauncher = l;
         DeviceProfile dp = mLauncher.getDeviceProfile();
         setShiftRange(dp.allAppsShiftRange);
         mProgress = 1f;
-        mPullBackProgress = 1f;
         mIsVerticalLayout = dp.isVerticalBarLayout();
+        mIsTablet = dp.isTablet;
         mLauncher.addOnDeviceProfileChangeListener(this);
     }
 
@@ -133,7 +176,7 @@
             mLauncher.getWorkspace().getPageIndicator().setTranslationY(0);
         }
 
-        mPullBackView = dp.isTablet ? mAppsView.getRecyclerViewContainer() : mAppsView;
+        mIsTablet = dp.isTablet;
     }
 
     /**
@@ -146,16 +189,27 @@
      */
     public void setProgress(float progress) {
         mProgress = progress;
-        mAppsView.setTranslationY(mProgress * mShiftRange);
+        getAppsViewProgressTranslationY().set(mAppsView, mProgress * mShiftRange);
     }
 
     public float getProgress() {
         return mProgress;
     }
 
-    private void setPullBackProgress(float progress) {
-        mPullBackProgress = progress;
-        mPullBackView.setTranslationY(mPullBackProgress * mShiftRange);
+    private FloatProperty<View> getAppsViewProgressTranslationY() {
+        return mAppsViewTranslationYPropertyFactory.get(INDEX_APPS_VIEW_PROGRESS);
+    }
+
+    private FloatProperty<View> getAppsViewPullbackTranslationY() {
+        return mAppsViewTranslationYPropertyFactory.get(INDEX_APPS_VIEW_PULLBACK);
+    }
+
+    private MultiValueAlpha.AlphaProperty getAppsViewProgressAlpha() {
+        return mAppsViewAlpha.getProperty(INDEX_APPS_VIEW_PROGRESS);
+    }
+
+    private MultiValueAlpha.AlphaProperty getAppsViewPullbackAlpha() {
+        return mAppsViewAlpha.getProperty(INDEX_APPS_VIEW_PULLBACK);
     }
 
     /**
@@ -164,8 +218,6 @@
      */
     @Override
     public void setState(LauncherState state) {
-        // Always reset pull back progress when switching states.
-        setPullBackProgress(0f);
         setProgress(state.getVerticalProgress(mLauncher));
         setAlphas(state, new StateAnimationConfig(), NO_ANIM_PROPERTY_SETTER);
         onProgressAnimationEnd();
@@ -180,10 +232,13 @@
             StateAnimationConfig config, PendingAnimation builder) {
         if (NORMAL.equals(toState) && mLauncher.isInState(ALL_APPS)) {
             UiThreadHelper.hideKeyboardAsync(mLauncher, mLauncher.getAppsView().getWindowToken());
+            builder.addEndListener(success -> {
+                // Reset pull back progress and alpha after switching states.
+                ALL_APPS_PULL_BACK_TRANSLATION.set(this, 0f);
+                ALL_APPS_PULL_BACK_ALPHA.set(this, 1f);
+            });
         }
 
-        // Always reset pull back progress when switching states.
-        setPullBackProgress(0f);
         float targetProgress = toState.getVerticalProgress(mLauncher);
         if (Float.compare(mProgress, targetProgress) == 0) {
             setAlphas(toState, config, builder);
@@ -222,7 +277,8 @@
         boolean hasAllAppsContent = (visibleElements & ALL_APPS_CONTENT) != 0;
 
         Interpolator allAppsFade = config.getInterpolator(ANIM_ALL_APPS_FADE, LINEAR);
-        setter.setViewAlpha(mAppsView, hasAllAppsContent ? 1 : 0, allAppsFade);
+        setter.setFloat(getAppsViewProgressAlpha(), MultiValueAlpha.VALUE,
+                hasAllAppsContent ? 1 : 0, allAppsFade);
 
         boolean shouldProtectHeader =
                 ALL_APPS == state || mLauncher.getStateManager().getState() == ALL_APPS;
@@ -245,8 +301,8 @@
                             | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
         }
         mAppsView.setScrimView(scrimView);
-        mPullBackView = mLauncher.getDeviceProfile().isTablet
-                ? mAppsView.getRecyclerViewContainer() : mAppsView;
+        mAppsViewAlpha = new MultiValueAlpha(mAppsView, APPS_VIEW_INDEX_COUNT);
+        mAppsViewAlpha.setUpdateVisibility(true);
     }
 
     /**
diff --git a/src/com/android/launcher3/dragndrop/DragLayer.java b/src/com/android/launcher3/dragndrop/DragLayer.java
index 14e10918..8eeca7d 100644
--- a/src/com/android/launcher3/dragndrop/DragLayer.java
+++ b/src/com/android/launcher3/dragndrop/DragLayer.java
@@ -65,9 +65,7 @@
 public class DragLayer extends BaseDragLayer<Launcher> {
 
     public static final int ALPHA_INDEX_OVERLAY = 0;
-    public static final int ALPHA_INDEX_LAUNCHER_LOAD = 1;
-    public static final int ALPHA_INDEX_TRANSITIONS = 2;
-    private static final int ALPHA_CHANNEL_COUNT = 3;
+    private static final int ALPHA_CHANNEL_COUNT = 1;
 
     public static final int ANIMATION_END_DISAPPEAR = 0;
     public static final int ANIMATION_END_REMAIN_VISIBLE = 2;
diff --git a/src/com/android/launcher3/util/MultiAdditivePropertyFactory.java b/src/com/android/launcher3/util/MultiAdditivePropertyFactory.java
new file mode 100644
index 0000000..50f7027
--- /dev/null
+++ b/src/com/android/launcher3/util/MultiAdditivePropertyFactory.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.util;
+
+import android.util.ArrayMap;
+import android.util.FloatProperty;
+import android.util.Log;
+import android.util.Property;
+import android.view.View;
+
+/**
+ * Allows to combine multiple values set by several sources.
+ *
+ * The various sources are meant to use [set], providing different `setterIndex` params. When it is
+ * not set, 0 is used. This is meant to cover the case multiple animations are going on at the same
+ * time.
+ *
+ * This class behaves similarly to [MultiValueAlpha], but is meant to be more abstract and reusable.
+ * It sets the addition of all values.
+ *
+ * @param <T> Type where to apply the property.
+ */
+public class MultiAdditivePropertyFactory<T extends View> {
+
+    private static final boolean DEBUG = false;
+    private static final String TAG = "MultiAdditivePropertyFactory";
+    private final String mName;
+    private final ArrayMap<Integer, MultiAdditiveProperty> mProperties =
+            new ArrayMap<>();
+
+    // This is an optimization for cases when set is called repeatedly with the same setterIndex.
+    private float mAggregationOfOthers = 0f;
+    private Integer mLastIndexSet = -1;
+    private final Property<View, Float> mProperty;
+
+    public MultiAdditivePropertyFactory(String name, Property<View, Float> property) {
+        mName = name;
+        mProperty = property;
+    }
+
+    /** Returns the [MultiFloatProperty] associated with [inx], creating it if not present. */
+    public MultiAdditiveProperty get(Integer index) {
+        return mProperties.computeIfAbsent(index,
+                (k) -> new MultiAdditiveProperty(index, mName + "_" + index));
+    }
+
+    /**
+     * Each [setValue] will be aggregated with the other properties values created by the
+     * corresponding factory.
+     */
+    class MultiAdditiveProperty extends FloatProperty<T> {
+        private final int mInx;
+        private float mValue = 0f;
+
+        MultiAdditiveProperty(int inx, String name) {
+            super(name);
+            mInx = inx;
+        }
+
+        @Override
+        public void setValue(T obj, float newValue) {
+            if (mLastIndexSet != mInx) {
+                mAggregationOfOthers = 0f;
+                mProperties.forEach((key, property) -> {
+                    if (key != mInx) {
+                        mAggregationOfOthers += property.mValue;
+                    }
+                });
+                mLastIndexSet = mInx;
+            }
+            float lastAggregatedValue = mAggregationOfOthers + newValue;
+            mValue = newValue;
+            apply(obj, lastAggregatedValue);
+
+            if (DEBUG) {
+                Log.d(TAG, "name=" + mName
+                        + " newValue=" + newValue + " mInx=" + mInx
+                        + " aggregated=" + lastAggregatedValue + " others= " + mProperties);
+            }
+        }
+
+        @Override
+        public Float get(T view) {
+            // The scale of the view should match mLastAggregatedValue. Still, if it has been
+            // changed without using this property, it can differ. As this get method is usually
+            // used to set the starting point on an animation, this would result in some jumps
+            // when the view scale is different than the last aggregated value. To stay on the
+            // safe side, let's return the real view scale.
+            return mProperty.get(view);
+        }
+
+        @Override
+        public String toString() {
+            return String.valueOf(mValue);
+        }
+    }
+
+    protected void apply(View view, float value) {
+        mProperty.set(view, value);
+    }
+}
diff --git a/tests/src/com/android/launcher3/util/MultiAdditivePropertyTest.kt b/tests/src/com/android/launcher3/util/MultiAdditivePropertyTest.kt
new file mode 100644
index 0000000..309d055
--- /dev/null
+++ b/tests/src/com/android/launcher3/util/MultiAdditivePropertyTest.kt
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.util
+
+import android.view.View
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+import org.junit.runner.RunWith
+
+/** Unit tests for [MultiAdditivePropertyFactory] */
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class MultiAdditivePropertyTest {
+
+    private val received = mutableListOf<Float>()
+
+    private val factory =
+        object : MultiAdditivePropertyFactory<View?>("Test", View.TRANSLATION_X) {
+            override fun apply(obj: View?, value: Float) {
+                received.add(value)
+            }
+        }
+
+    private val p1 = factory.get(1)
+    private val p2 = factory.get(2)
+    private val p3 = factory.get(3)
+
+    @Test
+    fun set_sameIndexes_allApplied() {
+        val v1 = 50f
+        val v2 = 100f
+        p1.set(null, v1)
+        p1.set(null, v1)
+        p1.set(null, v2)
+
+        assertThat(received).containsExactly(v1, v1, v2)
+    }
+
+    @Test
+    fun set_differentIndexes_aggregationApplied() {
+        val v1 = 50f
+        val v2 = 100f
+        val v3 = 150f
+        p1.set(null, v1)
+        p2.set(null, v2)
+        p3.set(null, v3)
+
+        assertThat(received).containsExactly(v1, v1 + v2, v1 + v2 + v3)
+    }
+}
diff --git a/tests/src/com/android/launcher3/util/MultiScalePropertyTest.kt b/tests/src/com/android/launcher3/util/MultiScalePropertyTest.kt
index 6099987..7d92214 100644
--- a/tests/src/com/android/launcher3/util/MultiScalePropertyTest.kt
+++ b/tests/src/com/android/launcher3/util/MultiScalePropertyTest.kt
@@ -1,3 +1,19 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package com.android.launcher3.util
 
 import android.view.View