diff --git a/quickstep/AndroidManifest.xml b/quickstep/AndroidManifest.xml
index b43d8d1..dc92731 100644
--- a/quickstep/AndroidManifest.xml
+++ b/quickstep/AndroidManifest.xml
@@ -22,11 +22,6 @@
      xmlns:tools="http://schemas.android.com/tools"
      package="com.android.launcher3">
 
-     <permission
-        android:name="${packageName}.permission.HOTSEAT_EDU"
-        android:permissionGroup="android.permission-group.SYSTEM_TOOLS"
-        android:protectionLevel="signatureOrSystem" />
-
     <uses-permission android:name="android.permission.BROADCAST_CLOSE_SYSTEM_DIALOGS" />
     <uses-permission android:name="android.permission.CONTROL_REMOTE_APP_TRANSITION_ANIMATIONS"/>
     <uses-permission android:name="android.permission.VIBRATE"/>
@@ -41,7 +36,6 @@
     <uses-permission android:name="android.permission.MANAGE_ACCESSIBILITY"/>
     <uses-permission android:name="android.permission.MONITOR_INPUT"/>
 
-    <uses-permission android:name="${packageName}.permission.HOTSEAT_EDU" />
     <uses-permission android:name="android.permission.SYSTEM_APPLICATION_OVERLAY" />
 
     <application android:backupAgent="com.android.launcher3.LauncherBackupAgent"
@@ -133,20 +127,6 @@
             </intent-filter>
         </activity>
 
-        <activity
-            android:name=".hybridhotseat.HotseatEduActivity"
-            android:theme="@android:style/Theme.NoDisplay"
-            android:noHistory="true"
-            android:launchMode="singleTask"
-            android:clearTaskOnLaunch="true"
-            android:permission="${packageName}.permission.HOTSEAT_EDU"
-            android:exported="true">
-            <intent-filter>
-                <action android:name="com.android.launcher3.action.SHOW_HYBRID_HOTSEAT_EDU"/>
-                <category android:name="android.intent.category.DEFAULT" />
-            </intent-filter>
-        </activity>
-
     </application>
 
 </manifest>
diff --git a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
index f06447b..494b953 100644
--- a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
+++ b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
@@ -1124,6 +1124,7 @@
             if (target.mode == mode && target.taskInfo != null
                     // Compare component name instead of task-id because transitions will promote
                     // the target up to the root task while getTaskId returns the leaf.
+                    && target.taskInfo.topActivity != null
                     && target.taskInfo.topActivity.equals(mLauncher.getComponentName())) {
                 return true;
             }
diff --git a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduActivity.java b/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduActivity.java
deleted file mode 100644
index 3a7d821..0000000
--- a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduActivity.java
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.launcher3.hybridhotseat;
-
-import android.app.Activity;
-import android.content.Intent;
-import android.os.Bundle;
-
-import com.android.launcher3.BaseActivity;
-import com.android.launcher3.Launcher;
-import com.android.launcher3.uioverrides.QuickstepLauncher;
-import com.android.launcher3.util.ActivityTracker;
-
-/**
- * Proxy activity to return user to home screen and show halfsheet education
- */
-public class HotseatEduActivity extends Activity {
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
-        Intent homeIntent = new Intent(Intent.ACTION_MAIN)
-                .addCategory(Intent.CATEGORY_HOME)
-                .setPackage(getPackageName())
-                .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-
-        Launcher.ACTIVITY_TRACKER.registerCallback(new HotseatActivityTracker());
-        startActivity(homeIntent);
-        finish();
-    }
-
-    static class HotseatActivityTracker<T extends QuickstepLauncher> implements
-            ActivityTracker.SchedulerCallback {
-
-        @Override
-        public boolean init(BaseActivity activity, boolean alreadyOnHome) {
-            QuickstepLauncher launcher = (QuickstepLauncher) activity;
-            if (launcher != null) {
-                launcher.getHotseatPredictionController().showEdu();
-            }
-            return false;
-        }
-
-    }
-}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
index 5144d9a..59393d7 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
@@ -243,7 +243,19 @@
         if (!mTouchEnabled) {
             return true;
         }
-        mControllerCallbacks.onTouchEvent(event);
+        if (mIconLayoutBounds.contains((int) event.getX(), (int) event.getY())) {
+            // Don't allow long pressing between icons.
+            return true;
+        }
+        if (mControllerCallbacks.onTouchEvent(event)) {
+            int oldAction = event.getAction();
+            try {
+                event.setAction(MotionEvent.ACTION_CANCEL);
+                return super.onTouchEvent(event);
+            } finally {
+                event.setAction(oldAction);
+            }
+        }
         return super.onTouchEvent(event);
     }
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
index 40b0e18..f1748af 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
@@ -223,7 +223,11 @@
             return view -> mControllers.taskbarStashController.updateAndAnimateIsStashedInApp(true);
         }
 
-        public void onTouchEvent(MotionEvent motionEvent) {
+        /**
+         * Get the first chance to handle TaskbarView#onTouchEvent, and return whether we want to
+         * consume the touch so TaskbarView treats it as an ACTION_CANCEL.
+         */
+        public boolean onTouchEvent(MotionEvent motionEvent) {
             final float x = motionEvent.getRawX();
             final float y = motionEvent.getRawY();
             switch (motionEvent.getAction()) {
@@ -239,6 +243,7 @@
                         mControllers.taskbarStashController.startStashHint(
                                 /* animateForward= */ false);
                         mCanceledStashHint = true;
+                        return true;
                     }
                     break;
                 case MotionEvent.ACTION_UP:
@@ -249,6 +254,7 @@
                     }
                     break;
             }
+            return false;
         }
     }
 }
diff --git a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
index 0d83510..be0c980 100644
--- a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
+++ b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
@@ -805,7 +805,9 @@
         mActivityInitListener.unregister();
         mStateCallback.setStateOnUiThread(STATE_GESTURE_CANCELLED | STATE_HANDLER_INVALIDATED);
 
-        TaskViewUtils.setDividerBarShown(mRecentsAnimationTargets.nonApps, true);
+        if (mRecentsAnimationTargets != null) {
+            TaskViewUtils.setDividerBarShown(mRecentsAnimationTargets.nonApps, true);
+        }
 
         // Defer clearing the controller and the targets until after we've updated the state
         mRecentsAnimationController = null;
diff --git a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
index 780032e..0efe666 100644
--- a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
+++ b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
@@ -33,11 +33,8 @@
 import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
-import android.os.SystemClock;
-import android.util.Log;
 import android.util.SparseIntArray;
 
-import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.tracing.OverviewComponentObserverProto;
 import com.android.launcher3.tracing.TouchInteractionServiceProto;
 import com.android.launcher3.util.SimpleBroadcastReceiver;
@@ -132,16 +129,6 @@
     private void updateOverviewTargets() {
         ComponentName defaultHome = PackageManagerWrapper.getInstance()
                 .getHomeActivities(new ArrayList<>());
-        if (TestProtocol.sDebugTracing && defaultHome == null) {
-            Log.d(TestProtocol.THIRD_PARTY_LAUNCHER_NOT_SET, "getHomeActivities returned null");
-            while ((defaultHome =
-                    PackageManagerWrapper.getInstance().getHomeActivities(new ArrayList<>()))
-                    == null) {
-                SystemClock.sleep(10);
-            }
-            Log.d(TestProtocol.THIRD_PARTY_LAUNCHER_NOT_SET,
-                    "getHomeActivities returned non-null: " + defaultHome);
-        }
 
         mIsHomeDisabled = mDeviceState.isHomeDisabled();
         mIsDefaultHome = Objects.equals(mMyHomeIntent.getComponent(), defaultHome);
diff --git a/quickstep/src/com/android/quickstep/TaskOverlayFactory.java b/quickstep/src/com/android/quickstep/TaskOverlayFactory.java
index eb5c43f..978fb57 100644
--- a/quickstep/src/com/android/quickstep/TaskOverlayFactory.java
+++ b/quickstep/src/com/android/quickstep/TaskOverlayFactory.java
@@ -107,6 +107,13 @@
 
     public static void addSplitOptions(List<SystemShortcut> outShortcuts,
             BaseDraggingActivity activity, TaskView taskView, DeviceProfile deviceProfile) {
+        int[] taskViewTaskIds = taskView.getTaskIds();
+        boolean alreadyHasMultipleTasks = taskViewTaskIds[0] != -1 &&
+                taskViewTaskIds[1] != -1;
+        if (alreadyHasMultipleTasks) {
+            return;
+        }
+
         PagedOrientationHandler orientationHandler =
                 taskView.getRecentsView().getPagedOrientationHandler();
         List<SplitPositionOption> positions =
diff --git a/quickstep/src/com/android/quickstep/views/OverviewActionsView.java b/quickstep/src/com/android/quickstep/views/OverviewActionsView.java
index 5d1c202..1b28c53 100644
--- a/quickstep/src/com/android/quickstep/views/OverviewActionsView.java
+++ b/quickstep/src/com/android/quickstep/views/OverviewActionsView.java
@@ -223,7 +223,6 @@
         mDp = dp;
         updateVerticalMargin(SysUINavigationMode.getMode(getContext()));
         requestLayout();
-        setSplitButtonVisible(mDp.isTablet);
     }
 
     public void setSplitButtonVisible(boolean visible) {
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index c6e2a5d..78b3d4f 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -1351,23 +1351,29 @@
                 }
                 Log.d(TASK_VIEW_ID_CRASH, "taskViewCount: " + getTaskViewCount()
                         + " " + sb.toString());
+                mRunningTaskViewId = -1;
+            } else {
+                mRunningTaskViewId = newRunningTaskView.getTaskViewId();
             }
-            mRunningTaskViewId = newRunningTaskView.getTaskViewId();
         }
 
+        int targetPage = -1;
         if (mNextPage == INVALID_PAGE) {
             // Set the current page to the running task, but not if settling on new task.
             if (runningTaskId != -1) {
-                setCurrentPage(indexOfChild(newRunningTaskView));
+                targetPage = indexOfChild(newRunningTaskView);
             } else if (getTaskViewCount() > 0) {
-                setCurrentPage(indexOfChild(getTaskViewAt(0)));
+                targetPage = indexOfChild(getTaskViewAt(0));
             }
         } else if (currentTaskId != -1) {
             currentTaskView = getTaskViewByTaskId(currentTaskId);
             if (currentTaskView != null) {
-                setCurrentPage(indexOfChild(currentTaskView));
+                targetPage = indexOfChild(currentTaskView);
             }
         }
+        if (targetPage != -1 && mCurrentPage != targetPage) {
+            setCurrentPage(targetPage);
+        }
 
         if (mIgnoreResetTaskId != -1 &&
                 getTaskViewByTaskId(mIgnoreResetTaskId) != ignoreResetTaskView) {
@@ -1500,7 +1506,7 @@
         mActionsView.setDp(dp);
         mOrientationState.setDeviceProfile(dp);
 
-        // Update RecentsView adn TaskView's DeviceProfile dependent layout.
+        // Update RecentsView and TaskView's DeviceProfile dependent layout.
         updateOrientationHandler();
     }
 
@@ -2596,7 +2602,6 @@
         mFirstFloatingTaskView.setAlpha(1);
         mFirstFloatingTaskView.addAnimation(anim, startingTaskRect,
                 mTempRect, mSplitHiddenTaskView, true /*fadeWithThumbnail*/);
-        anim.addEndListener(aBoolean -> mActionsView.setSplitButtonVisible(false));
     }
 
     /**
@@ -2936,6 +2941,7 @@
                         dispatchScrollChanged();
                     }
                 }
+                updateFocusedSplitButtonVisibility();
                 onDismissAnimationEnds();
                 mPendingAnimation = null;
             }
@@ -2944,6 +2950,19 @@
     }
 
     /**
+     * Shows split button if
+     * * We're in large screen
+     * * We're not already in split
+     * * There are at least 2 tasks to invoke split
+     */
+    private void updateFocusedSplitButtonVisibility() {
+        mActionsView.setSplitButtonVisible(mActivity.getDeviceProfile().isTablet &&
+                !(getRunningTaskView() instanceof GroupedTaskView) &&
+                getTaskViewCount() > 1
+        );
+    }
+
+    /**
      * Returns all the tasks in the top row, without the focused task
      */
     private IntArray getTopRowIdArray() {
@@ -3748,7 +3767,6 @@
             mSecondSplitHiddenTaskView.setVisibility(VISIBLE);
             mSecondSplitHiddenTaskView = null;
         }
-        mActionsView.setSplitButtonVisible(true);
     }
 
     private void updateDeadZoneRects() {
@@ -3963,6 +3981,7 @@
     @Override
     protected void notifyPageSwitchListener(int prevPage) {
         super.notifyPageSwitchListener(prevPage);
+        updateFocusedSplitButtonVisibility();
         loadVisibleTaskData(TaskView.FLAG_UPDATE_ALL);
         updateEnabledOverlays();
     }
diff --git a/res/drawable/padded_rounded_action_button.xml b/res/drawable/padded_rounded_action_button.xml
index 6432efd..6863f92 100644
--- a/res/drawable/padded_rounded_action_button.xml
+++ b/res/drawable/padded_rounded_action_button.xml
@@ -14,18 +14,11 @@
   ~ limitations under the License.
   -->
 
-<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:androidprv="http://schemas.android.com/apk/prv/res/android">
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item
+        android:drawable="@drawable/rounded_action_button"
         android:left="@dimen/padded_rounded_button_padding"
         android:top="@dimen/padded_rounded_button_padding"
         android:right="@dimen/padded_rounded_button_padding"
-        android:bottom="@dimen/padded_rounded_button_padding">
-        <shape android:shape="rectangle">
-            <corners android:radius="@dimen/rounded_button_radius" />
-            <stroke android:width="1dp"
-                android:color="?androidprv:attr/colorAccentPrimaryVariant" />
-        </shape>
-    </item>
+        android:bottom="@dimen/padded_rounded_button_padding" />
 </layer-list>
-
diff --git a/res/drawable/rounded_action_button.xml b/res/drawable/rounded_action_button.xml
index f043893..b9942c0 100644
--- a/res/drawable/rounded_action_button.xml
+++ b/res/drawable/rounded_action_button.xml
@@ -19,7 +19,9 @@
     xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
     android:shape="rectangle">
     <corners android:radius="@dimen/rounded_button_radius" />
-    <stroke android:width="1dp" android:color="@color/all_apps_tab_background_selected" />
+    <stroke
+        android:width="1dp"
+        android:color="?androidprv:attr/colorAccentPrimaryVariant" />
     <padding
         android:left="@dimen/rounded_button_padding"
         android:right="@dimen/rounded_button_padding" />
diff --git a/res/layout/arrow_toast.xml b/res/layout/arrow_toast.xml
index 9a6f8c3..88a92eb 100644
--- a/res/layout/arrow_toast.xml
+++ b/res/layout/arrow_toast.xml
@@ -27,15 +27,13 @@
         android:gravity="center"
         android:padding="16dp"
         android:background="@drawable/arrow_toast_rounded_background"
-        android:elevation="2dp"
-        android:outlineProvider="none"
+        android:elevation="@dimen/arrow_toast_elevation"
         android:textColor="@color/arrow_tip_view_content"
         android:textSize="14sp"/>
 
     <View
         android:id="@+id/arrow"
-        android:elevation="2dp"
-        android:outlineProvider="none"
+        android:elevation="@dimen/arrow_toast_elevation"
         android:layout_width="@dimen/arrow_toast_arrow_width"
         android:layout_height="10dp"/>
 </merge>
diff --git a/res/layout/notification_content.xml b/res/layout/notification_content.xml
index 84822a6..91897e9 100644
--- a/res/layout/notification_content.xml
+++ b/res/layout/notification_content.xml
@@ -14,10 +14,11 @@
      limitations under the License.
 -->
 
-<merge
+<com.android.launcher3.notification.NotificationMainView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content">
+    android:layout_height="wrap_content"
+    android:orientation="vertical">
 
     <!-- header -->
     <FrameLayout
@@ -49,7 +50,7 @@
     </FrameLayout>
 
     <!-- Main view -->
-    <com.android.launcher3.notification.NotificationMainView
+    <FrameLayout
         android:id="@+id/main_view"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -59,7 +60,6 @@
             android:id="@+id/text_and_background"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:background="?attr/popupColorPrimary"
             android:gravity="center_vertical"
             android:orientation="vertical"
             android:paddingTop="@dimen/notification_padding"
@@ -95,5 +95,5 @@
             android:layout_marginTop="@dimen/notification_padding"
             android:layout_marginStart="@dimen/notification_icon_padding" />
 
-    </com.android.launcher3.notification.NotificationMainView>
-</merge>
\ No newline at end of file
+    </FrameLayout>
+</com.android.launcher3.notification.NotificationMainView>
\ No newline at end of file
diff --git a/res/layout/popup_container.xml b/res/layout/popup_container.xml
index 18014bb..9327287 100644
--- a/res/layout/popup_container.xml
+++ b/res/layout/popup_container.xml
@@ -31,12 +31,9 @@
         android:elevation="@dimen/deep_shortcuts_elevation"
         android:orientation="vertical"/>
 
-    <LinearLayout
+    <com.android.launcher3.notification.NotificationContainer
         android:id="@+id/notification_container"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:visibility="gone"
-        android:background="?attr/popupColorPrimary"
-        android:elevation="@dimen/deep_shortcuts_elevation"
-        android:orientation="vertical"/>
+        android:visibility="gone"/>
 </com.android.launcher3.popup.PopupContainerWithArrow>
\ No newline at end of file
diff --git a/res/layout/system_shortcut.xml b/res/layout/system_shortcut.xml
index 89895e5..21d532e 100644
--- a/res/layout/system_shortcut.xml
+++ b/res/layout/system_shortcut.xml
@@ -17,7 +17,8 @@
 <com.android.launcher3.shortcuts.DeepShortcutView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="@dimen/bg_popup_item_width"
-    android:layout_height="@dimen/bg_popup_item_height"
+    android:layout_height="wrap_content"
+    android:minHeight="@dimen/bg_popup_item_height"
     android:elevation="@dimen/deep_shortcuts_elevation"
     android:background="@drawable/middle_item_primary"
     android:theme="@style/PopupItem" >
diff --git a/res/layout/system_shortcut_content.xml b/res/layout/system_shortcut_content.xml
index 8b39202..3ef0b94 100644
--- a/res/layout/system_shortcut_content.xml
+++ b/res/layout/system_shortcut_content.xml
@@ -22,6 +22,9 @@
         android:id="@+id/bubble_text"
         android:background="?android:attr/selectableItemBackground"
         android:gravity="start|center_vertical"
+        android:paddingTop="@dimen/bg_popup_item_vertical_padding"
+        android:paddingBottom="@dimen/bg_popup_item_vertical_padding"
+        android:minHeight="@dimen/bg_popup_item_height"
         android:textAlignment="viewStart"
         android:paddingStart="@dimen/deep_shortcuts_text_padding_start"
         android:paddingEnd="@dimen/popup_padding_end"
diff --git a/res/layout/work_apps_paused.xml b/res/layout/work_apps_paused.xml
index ec34b47..79bce70 100644
--- a/res/layout/work_apps_paused.xml
+++ b/res/layout/work_apps_paused.xml
@@ -28,7 +28,7 @@
         android:layout_marginTop="40dp"
         android:text="@string/work_apps_paused_title"
         android:textAlignment="center"
-        android:textSize="22sp" />
+        android:textSize="18sp" />
 
     <TextView
         android:layout_width="wrap_content"
diff --git a/res/values/config.xml b/res/values/config.xml
index 04c359e..72959b2 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -34,6 +34,9 @@
     <!-- View tag key used to determine if we should fade in the child views.. -->
     <string name="popup_container_iterate_children" translatable="false">popup_container_iterate_children</string>
 
+    <!-- config used to determine if header protection is supported in AllApps -->
+    <bool name="config_header_protection_supported">false</bool>
+
     <!-- Workspace -->
     <!-- The duration (in ms) of the fade animation on the object outlines, used when
          we are dragging objects around on the home screen. -->
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 86b4e71..5fc0480 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -110,6 +110,7 @@
     <dimen name="all_apps_tip_bottom_margin">8dp</dimen>
     <!-- The size of corner radius of the arrow in the arrow toast. -->
     <dimen name="arrow_toast_corner_radius">2dp</dimen>
+    <dimen name="arrow_toast_elevation">2dp</dimen>
     <dimen name="arrow_toast_arrow_width">10dp</dimen>
 
 <!-- Search bar in All Apps -->
@@ -240,6 +241,7 @@
     <dimen name="bg_popup_padding">2dp</dimen>
     <dimen name="bg_popup_item_width">216dp</dimen>
     <dimen name="bg_popup_item_height">56dp</dimen>
+    <dimen name="bg_popup_item_vertical_padding">12dp</dimen>
     <dimen name="pre_drag_view_scale">6dp</dimen>
     <!-- an icon with shortcuts must be dragged this far before the container is removed. -->
     <dimen name="deep_shortcuts_start_drag_threshold">16dp</dimen>
@@ -270,6 +272,8 @@
 
 <!-- Notifications -->
     <dimen name="bg_round_rect_radius">8dp</dimen>
+    <dimen name="notification_max_trans">8dp</dimen>
+    <dimen name="notification_space">8dp</dimen>
     <dimen name="notification_padding">16dp</dimen>
     <dimen name="notification_padding_top">18dp</dimen>
     <dimen name="notification_header_text_size">14sp</dimen>
@@ -346,4 +350,5 @@
     <dimen name="search_row_icon_size">48dp</dimen>
     <dimen name="search_row_small_icon_size">32dp</dimen>
     <dimen name="padded_rounded_button_padding">8dp</dimen>
+
 </resources>
diff --git a/src/com/android/launcher3/BubbleTextView.java b/src/com/android/launcher3/BubbleTextView.java
index 02ec5e8..e52d1be 100644
--- a/src/com/android/launcher3/BubbleTextView.java
+++ b/src/com/android/launcher3/BubbleTextView.java
@@ -409,6 +409,10 @@
      * Returns true if the touch down at the provided position be ignored
      */
     protected boolean shouldIgnoreTouchDown(float x, float y) {
+        if (mDisplay == DISPLAY_TASKBAR) {
+            // Allow touching within padding on taskbar, given icon sizes are smaller.
+            return false;
+        }
         return y < getPaddingTop()
                 || x < getPaddingLeft()
                 || y > getHeight() - getPaddingBottom()
diff --git a/src/com/android/launcher3/DropTargetBar.java b/src/com/android/launcher3/DropTargetBar.java
index 88f6c49..eb42a65 100644
--- a/src/com/android/launcher3/DropTargetBar.java
+++ b/src/com/android/launcher3/DropTargetBar.java
@@ -25,6 +25,7 @@
 import android.content.Context;
 import android.graphics.Rect;
 import android.util.AttributeSet;
+import android.util.Log;
 import android.util.TypedValue;
 import android.view.Gravity;
 import android.view.View;
@@ -32,10 +33,13 @@
 import android.view.ViewPropertyAnimator;
 import android.widget.FrameLayout;
 
+import androidx.annotation.NonNull;
+
 import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.dragndrop.DragController;
 import com.android.launcher3.dragndrop.DragController.DragListener;
 import com.android.launcher3.dragndrop.DragOptions;
+import com.android.launcher3.testing.TestProtocol;
 
 /*
  * The top bar containing various drop targets: Delete/App Info/Uninstall.
@@ -212,6 +216,9 @@
     }
 
     public void animateToVisibility(boolean isVisible) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "8");
+        }
         if (mVisible != isVisible) {
             mVisible = isVisible;
 
@@ -238,6 +245,9 @@
      */
     @Override
     public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "7");
+        }
         animateToVisibility(true);
     }
 
@@ -261,4 +271,12 @@
     public ButtonDropTarget[] getDropTargets() {
         return mDropTargets;
     }
+
+    @Override
+    protected void onVisibilityChanged(@NonNull View changedView, int visibility) {
+        super.onVisibilityChanged(changedView, visibility);
+        if (TestProtocol.sDebugTracing && visibility == VISIBLE) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "9");
+        }
+    }
 }
diff --git a/src/com/android/launcher3/ExtendedEditText.java b/src/com/android/launcher3/ExtendedEditText.java
index a4e1af6..21bc479 100644
--- a/src/com/android/launcher3/ExtendedEditText.java
+++ b/src/com/android/launcher3/ExtendedEditText.java
@@ -99,8 +99,18 @@
         }
     }
 
-    // inherited class can override to change the appearance of the edit text.
-    public void show() {}
+    /**
+     * Sets whether EditText background should be visible
+     * @param maxAlpha defines the maximum alpha the background should animates to
+     */
+    public void setBackgroundVisibility(boolean visible, float maxAlpha) {}
+
+    /**
+     * Returns whether a visible background is set on EditText
+     */
+    public boolean getBackgroundVisibility() {
+        return getBackground() != null;
+    }
 
     public void showKeyboard() {
         mShowImeAfterFirstLayout = !showSoftInput();
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 3754dc1..94dbe00 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -555,6 +555,14 @@
     }
 
     @Override
+    public void onMultiWindowModeChanged(boolean isInMultiWindowMode, Configuration newConfig) {
+        super.onMultiWindowModeChanged(isInMultiWindowMode, newConfig);
+        // Always update device profile when multi window mode changed.
+        initDeviceProfile(mDeviceProfile.inv);
+        dispatchDeviceProfileChanged();
+    }
+
+    @Override
     public void onConfigurationChanged(Configuration newConfig) {
         int diff = newConfig.diff(mOldConfig);
         if ((diff & (CONFIG_ORIENTATION | CONFIG_SCREEN_SIZE)) != 0) {
@@ -592,11 +600,9 @@
 
     private void initDeviceProfile(InvariantDeviceProfile idp) {
         // Load configuration-specific DeviceProfile
-        mDeviceProfile = idp.getDeviceProfile(this);
-        if (isInMultiWindowMode()) {
-            mDeviceProfile = mDeviceProfile.getMultiWindowProfile(
-                    this, getMultiWindowDisplaySize());
-        }
+        mDeviceProfile = isInMultiWindowMode()
+                ? mDeviceProfile.getMultiWindowProfile(this, getMultiWindowDisplaySize())
+                : idp.getDeviceProfile(this);
 
         onDeviceProfileInitiated();
         mModelWriter = mModel.getWriter(getDeviceProfile().isVerticalBarLayout(), true, this);
@@ -1195,7 +1201,7 @@
         // Until the workspace is bound, ensure that we keep the wallpaper offset locked to the
         // default state, otherwise we will update to the wrong offsets in RTL
         mWorkspace.lockWallpaperToDefaultPage();
-        mWorkspace.bindAndInitFirstWorkspaceScreen(null /* recycled qsb */);
+        mWorkspace.bindAndInitFirstWorkspaceScreen();
         mDragController.addDragListener(mWorkspace);
 
         // Get the search/delete/uninstall bar
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index 696e897..2f9b5af 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -1046,7 +1046,7 @@
     /**
      * If being flinged and user touches the screen, initiate drag; otherwise don't.
      */
-    private void updateIsBeingDraggedOnTouchDown(MotionEvent ev) {
+    protected void updateIsBeingDraggedOnTouchDown(MotionEvent ev) {
         // mScroller.isFinished should be false when being flinged.
         final int xDist = Math.abs(mScroller.getFinalX() - mScroller.getCurrX());
         final boolean finishedScrolling = (mScroller.isFinished() || xDist < mPageSlop / 3);
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 94ec903..b197e1c 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -223,6 +223,9 @@
     // Variables relating to touch disambiguation (scrolling workspace vs. scrolling a widget)
     private float mXDown;
     private float mYDown;
+    private View mQsb;
+    private boolean mIsEventOverQsb;
+
     final static float START_DAMPING_TOUCH_SLOP_ANGLE = (float) Math.PI / 6;
     final static float MAX_SWIPE_ANGLE = (float) Math.PI / 3;
     final static float TOUCH_SLOP_DAMPING_FACTOR = 4;
@@ -548,9 +551,8 @@
 
     /**
      * Initializes and binds the first page
-     * @param qsb an existing qsb to recycle or null.
      */
-    public void bindAndInitFirstWorkspaceScreen(View qsb) {
+    public void bindAndInitFirstWorkspaceScreen() {
         if (!FeatureFlags.QSB_ON_FIRST_SCREEN) {
             return;
         }
@@ -558,10 +560,10 @@
         // Add the first page
         CellLayout firstPage = insertNewWorkspaceScreen(Workspace.FIRST_SCREEN_ID, getChildCount());
         // Always add a QSB on the first screen.
-        if (qsb == null) {
+        if (mQsb == null) {
             // In transposed layout, we add the QSB in the Grid. As workspace does not touch the
             // edges, we do not need a full width QSB.
-            qsb = LayoutInflater.from(getContext())
+            mQsb = LayoutInflater.from(getContext())
                     .inflate(R.layout.search_container_workspace, firstPage, false);
         }
 
@@ -570,8 +572,9 @@
         CellLayout.LayoutParams lp = new CellLayout.LayoutParams(0, 0, firstPage.getCountX(),
                 cellVSpan);
         lp.canReorder = false;
-        if (!firstPage.addViewToCellLayout(qsb, 0, R.id.search_container_workspace, lp, true)) {
+        if (!firstPage.addViewToCellLayout(mQsb, 0, R.id.search_container_workspace, lp, true)) {
             Log.e(TAG, "Failed to add to item at (0, 0) to CellLayout");
+            mQsb = null;
         }
     }
 
@@ -581,9 +584,8 @@
         disableLayoutTransitions();
 
         // Recycle the QSB widget
-        View qsb = findViewById(R.id.search_container_workspace);
-        if (qsb != null) {
-            ((ViewGroup) qsb.getParent()).removeView(qsb);
+        if (mQsb != null) {
+            ((ViewGroup) mQsb.getParent()).removeView(mQsb);
         }
 
         // Remove the pages and clear the screen models
@@ -596,7 +598,7 @@
         mLauncher.mHandler.removeCallbacksAndMessages(DeferredWidgetRefresh.class);
 
         // Ensure that the first page is always present
-        bindAndInitFirstWorkspaceScreen(qsb);
+        bindAndInitFirstWorkspaceScreen();
 
         // Re-enable the layout transitions
         enableLayoutTransitions();
@@ -922,17 +924,25 @@
     }
 
     @Override
-    public boolean onInterceptTouchEvent(MotionEvent ev) {
-        if (ev.getActionMasked() == MotionEvent.ACTION_DOWN) {
-            mXDown = ev.getX();
-            mYDown = ev.getY();
+    protected void updateIsBeingDraggedOnTouchDown(MotionEvent ev) {
+        super.updateIsBeingDraggedOnTouchDown(ev);
+
+        mXDown = ev.getX();
+        mYDown = ev.getY();
+        if (mQsb != null) {
+            mTempFXY[0] = mXDown + getScrollX();
+            mTempFXY[1] = mYDown + getScrollY();
+            Utilities.mapCoordInSelfToDescendant(mQsb, this, mTempFXY);
+            mIsEventOverQsb = mQsb.getLeft() <= mTempFXY[0] && mQsb.getRight() >= mTempFXY[0]
+                    && mQsb.getTop() <= mTempFXY[1] && mQsb.getBottom() >= mTempFXY[1];
+        } else {
+            mIsEventOverQsb = false;
         }
-        return super.onInterceptTouchEvent(ev);
     }
 
     @Override
     protected void determineScrollingStart(MotionEvent ev) {
-        if (!isFinishedSwitchingState()) return;
+        if (!isFinishedSwitchingState() || mIsEventOverQsb) return;
 
         float deltaX = ev.getX() - mXDown;
         float absDeltaX = Math.abs(deltaX);
diff --git a/src/com/android/launcher3/allapps/AllAppsContainerView.java b/src/com/android/launcher3/allapps/AllAppsContainerView.java
index 9c61c1b..57a3e1c 100644
--- a/src/com/android/launcher3/allapps/AllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsContainerView.java
@@ -59,6 +59,7 @@
 import com.android.launcher3.DeviceProfile.OnDeviceProfileChangeListener;
 import com.android.launcher3.DragSource;
 import com.android.launcher3.DropTarget.DragObject;
+import com.android.launcher3.ExtendedEditText;
 import com.android.launcher3.Insettable;
 import com.android.launcher3.InsettableFrameLayout;
 import com.android.launcher3.R;
@@ -118,7 +119,7 @@
     private SpannableStringBuilder mSearchQueryBuilder = null;
 
     protected boolean mUsingTabs;
-    private boolean mSearchModeWhileUsingTabs = false;
+    private boolean mIsSearching;
 
     protected RecyclerViewFastScroller mTouchHandler;
     protected final Point mFastScrollerOffset = new Point();
@@ -132,6 +133,7 @@
     private final float mHeaderThreshold;
     private ScrimView mScrimView;
     private int mHeaderColor;
+    private int mTabsProtectionAlpha;
 
     public AllAppsContainerView(Context context) {
         this(context, null);
@@ -625,18 +627,19 @@
         for (int i = 0; i < mAH.length; i++) {
             mAH[i].adapter.setLastSearchQuery(query);
         }
+        mIsSearching = true;
         if (mUsingTabs) {
-            mSearchModeWhileUsingTabs = true;
             rebindAdapters(false); // hide tabs
         }
         mHeader.setCollapsed(true);
     }
 
     public void onClearSearchResult() {
-        if (mSearchModeWhileUsingTabs) {
+        if (mUsingTabs) {
             rebindAdapters(true); // show tabs
-            mSearchModeWhileUsingTabs = false;
         }
+        mIsSearching = false;
+        getActiveRecyclerView().scrollToTop();
     }
 
     public void onSearchResultsChanged() {
@@ -710,13 +713,12 @@
         mHeaderPaint.setColor(mHeaderColor);
         mHeaderPaint.setAlpha((int) (getAlpha() * Color.alpha(mHeaderColor)));
         if (mHeaderPaint.getColor() != mScrimColor && mHeaderPaint.getColor() != 0) {
-            int bottom = mUsingTabs && mHeader.mHeaderCollapsed ? mHeader.getVisibleBottomBound()
-                    : mSearchContainer.getBottom();
-            canvas.drawRect(0, 0, canvas.getWidth(), bottom + getTranslationY(),
-                    mHeaderPaint);
-
-            if (FeatureFlags.ENABLE_DEVICE_SEARCH.get() && getTranslationY() == 0) {
-                mSearchUiManager.getEditText().setBackground(null);
+            int bottom = (int) (mSearchContainer.getBottom() + getTranslationY());
+            canvas.drawRect(0, 0, canvas.getWidth(), bottom, mHeaderPaint);
+            int tabsHeight = getFloatingHeaderView().getPeripheralProtectionHeight();
+            if (mTabsProtectionAlpha > 0 && tabsHeight != 0) {
+                mHeaderPaint.setAlpha((int) (getAlpha() * mTabsProtectionAlpha));
+                canvas.drawRect(0, bottom, canvas.getWidth(), bottom + tabsHeight, mHeaderPaint);
             }
         }
     }
@@ -796,18 +798,29 @@
 
 
     protected void updateHeaderScroll(int scrolledOffset) {
-        float prog = Math.max(0, Math.min(1, (float) scrolledOffset / mHeaderThreshold));
+
+        float prog = Utilities.boundToRange((float) scrolledOffset / mHeaderThreshold, 0f, 1f);
         int viewBG = ColorUtils.blendARGB(mScrimColor, mHeaderProtectionColor, prog);
         int headerColor = ColorUtils.setAlphaComponent(viewBG,
                 (int) (getSearchView().getAlpha() * 255));
-        if (headerColor != mHeaderColor) {
+        int tabsAlpha = mHeader.getPeripheralProtectionHeight() == 0 ? 0
+                : (int) (Utilities.boundToRange(
+                        (scrolledOffset + mHeader.mSnappedScrolledY) / mHeaderThreshold, 0f, 1f)
+                        * 255);
+        if (headerColor != mHeaderColor || mTabsProtectionAlpha != tabsAlpha) {
             mHeaderColor = headerColor;
-            getSearchView().setBackgroundColor(viewBG);
-            getFloatingHeaderView().setHeaderColor(viewBG);
+            mTabsProtectionAlpha = tabsAlpha;
             invalidateHeader();
-            if (scrolledOffset == 0 && mSearchUiManager.getEditText() != null) {
-                mSearchUiManager.getEditText().show();
+        }
+        if (mSearchUiManager.getEditText() != null) {
+            ExtendedEditText editText = mSearchUiManager.getEditText();
+            boolean bgVisible = editText.getBackgroundVisibility();
+            if (scrolledOffset == 0 && !mIsSearching) {
+                bgVisible = true;
+            } else if (scrolledOffset > mHeaderThreshold) {
+                bgVisible = false;
             }
+            editText.setBackgroundVisibility(bgVisible, 1 - prog);
         }
     }
 
@@ -815,7 +828,7 @@
      * redraws header protection
      */
     public void invalidateHeader() {
-        if (mScrimView != null && FeatureFlags.ENABLE_DEVICE_SEARCH.get()) {
+        if (mScrimView != null && mHeader.isHeaderProtectionSupported()) {
             mScrimView.invalidate();
         }
     }
diff --git a/src/com/android/launcher3/allapps/FloatingHeaderView.java b/src/com/android/launcher3/allapps/FloatingHeaderView.java
index 8ea83d5..debb5b2 100644
--- a/src/com/android/launcher3/allapps/FloatingHeaderView.java
+++ b/src/com/android/launcher3/allapps/FloatingHeaderView.java
@@ -17,9 +17,6 @@
 
 import android.animation.ValueAnimator;
 import android.content.Context;
-import android.graphics.Canvas;
-import android.graphics.Color;
-import android.graphics.Paint;
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.util.ArrayMap;
@@ -50,11 +47,10 @@
         ValueAnimator.AnimatorUpdateListener, PluginListener<AllAppsRow>, Insettable,
         OnHeightUpdatedListener {
 
-    private final Rect mClip = new Rect(0, 0, Integer.MAX_VALUE, Integer.MAX_VALUE);
+    private final Rect mRVClip = new Rect(0, 0, Integer.MAX_VALUE, Integer.MAX_VALUE);
+    private final Rect mHeaderClip = new Rect(0, 0, Integer.MAX_VALUE, Integer.MAX_VALUE);
     private final ValueAnimator mAnimator = ValueAnimator.ofInt(0, 0);
-    private final ValueAnimator mHeaderAnimator = ValueAnimator.ofInt(0, 1).setDuration(100);
     private final Point mTempOffset = new Point();
-    private final Paint mBGPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
     private final RecyclerView.OnScrollListener mOnScrollListener =
             new RecyclerView.OnScrollListener() {
                 @Override
@@ -82,19 +78,19 @@
                 }
             };
 
-    private final int mHeaderTopPadding;
-
     protected final Map<AllAppsRow, PluginHeaderRow> mPluginRows = new ArrayMap<>();
 
+    private final int mHeaderTopPadding;
+    private final boolean mHeaderProtectionSupported;
+
     protected ViewGroup mTabLayout;
     private AllAppsRecyclerView mMainRV;
     private AllAppsRecyclerView mWorkRV;
     private AllAppsRecyclerView mCurrentRV;
     private ViewGroup mParent;
     public boolean mHeaderCollapsed;
-    private int mSnappedScrolledY;
+    protected int mSnappedScrolledY;
     private int mTranslationY;
-    private int mHeaderColor;
 
     private boolean mForwardToRecyclerView;
 
@@ -120,6 +116,8 @@
         super(context, attrs);
         mHeaderTopPadding = context.getResources()
                 .getDimensionPixelSize(R.dimen.all_apps_header_top_padding);
+        mHeaderProtectionSupported = context.getResources().getBoolean(
+                R.bool.config_header_protection_supported);
     }
 
     @Override
@@ -138,7 +136,6 @@
         }
         mFixedRows = rows.toArray(new FloatingHeaderRow[rows.size()]);
         mAllRows = mFixedRows;
-        mHeaderAnimator.addUpdateListener(valueAnimator -> invalidate());
     }
 
     @Override
@@ -285,7 +282,7 @@
                 mHeaderCollapsed = false;
             }
             mTranslationY = currentScrollY;
-        } else if (!mHeaderCollapsed) {
+        } else {
             mTranslationY = currentScrollY - mSnappedScrolledY - mMaxTranslation;
 
             // update state vars
@@ -295,31 +292,10 @@
             } else if (mTranslationY <= -mMaxTranslation) { // hide or stay hidden
                 mHeaderCollapsed = true;
                 mSnappedScrolledY = -mMaxTranslation;
-                mHeaderAnimator.setCurrentFraction(0);
-                mHeaderAnimator.start();
             }
         }
     }
 
-    /**
-     * Set current header protection background color
-     */
-    public void setHeaderColor(int color) {
-        mHeaderColor = color;
-        invalidate();
-    }
-
-    @Override
-    protected void dispatchDraw(Canvas canvas) {
-        if (mHeaderCollapsed && !mCollapsed && mTabLayout.getVisibility() == VISIBLE
-                && mHeaderColor != Color.TRANSPARENT && FeatureFlags.ENABLE_DEVICE_SEARCH.get()) {
-            mBGPaint.setColor(mHeaderColor);
-            mBGPaint.setAlpha((int) (255 * mHeaderAnimator.getAnimatedFraction()));
-            canvas.drawRect(0, 0, getWidth(), getHeight() + mTranslationY, mBGPaint);
-        }
-        super.dispatchDraw(canvas);
-    }
-
     protected void applyVerticalMove() {
         int uncappedTranslationY = mTranslationY;
         mTranslationY = Math.max(mTranslationY, -mMaxTranslation);
@@ -336,11 +312,15 @@
         }
 
         mTabLayout.setTranslationY(mTranslationY);
-        mClip.top = mMaxTranslation + mTranslationY;
+
+        int clipHeight = mHeaderTopPadding - getPaddingBottom();
+        mRVClip.top = mTabsHidden ? clipHeight : 0;
+        mHeaderClip.top = clipHeight;
         // clipping on a draw might cause additional redraw
-        mMainRV.setClipBounds(mClip);
+        setClipBounds(mHeaderClip);
+        mMainRV.setClipBounds(mRVClip);
         if (mWorkRV != null) {
-            mWorkRV.setClipBounds(mClip);
+            mWorkRV.setClipBounds(mRVClip);
         }
     }
 
@@ -421,6 +401,10 @@
         return false;
     }
 
+    public boolean isHeaderProtectionSupported() {
+        return mHeaderProtectionSupported;
+    }
+
     @Override
     public boolean hasOverlappingRendering() {
         return false;
@@ -444,10 +428,19 @@
     }
 
     /**
-     * Returns visible height of FloatingHeaderView contents
+     * Returns visible height of FloatingHeaderView contents requiring header protection
      */
-    public int getVisibleBottomBound() {
-        return getBottom() + mTranslationY;
+    public int getPeripheralProtectionHeight() {
+        if (!mHeaderProtectionSupported) {
+            return 0;
+        }
+
+        // we only want to show protection when work tab is available and header is either
+        // collapsed or animating to/from collapsed state
+        if (mTabsHidden || !mHeaderCollapsed) {
+            return 0;
+        }
+        return Math.max(getHeight() - getPaddingTop() + mTranslationY, 0);
     }
 }
 
diff --git a/src/com/android/launcher3/dragndrop/DragController.java b/src/com/android/launcher3/dragndrop/DragController.java
index 1e0edac..fdb2799 100644
--- a/src/com/android/launcher3/dragndrop/DragController.java
+++ b/src/com/android/launcher3/dragndrop/DragController.java
@@ -22,6 +22,7 @@
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.util.Log;
 import android.view.DragEvent;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
@@ -34,6 +35,7 @@
 import com.android.launcher3.logging.InstanceId;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.TouchController;
 import com.android.launcher3.views.ActivityContext;
@@ -146,6 +148,9 @@
             float initialDragViewScale,
             float dragViewScaleOnDrop,
             DragOptions options) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "4");
+        }
         return startDrag(drawable, /* view= */ null, originalView, dragLayerX, dragLayerY,
                 source, dragInfo, dragOffset, dragRegion, initialDragViewScale, dragViewScaleOnDrop,
                 options);
@@ -203,6 +208,9 @@
             DragOptions options);
 
     protected void callOnDragStart() {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "6");
+        }
         if (mOptions.preDragCondition != null) {
             mOptions.preDragCondition.onPreDragEnd(mDragObject, true /* dragStarted*/);
         }
diff --git a/src/com/android/launcher3/dragndrop/LauncherDragController.java b/src/com/android/launcher3/dragndrop/LauncherDragController.java
index 0e8b0a5..dcbfa50 100644
--- a/src/com/android/launcher3/dragndrop/LauncherDragController.java
+++ b/src/com/android/launcher3/dragndrop/LauncherDragController.java
@@ -24,6 +24,7 @@
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.util.Log;
 import android.view.HapticFeedbackConstants;
 import android.view.View;
 
@@ -36,6 +37,7 @@
 import com.android.launcher3.R;
 import com.android.launcher3.accessibility.DragViewStateAnnouncer;
 import com.android.launcher3.model.data.ItemInfo;
+import com.android.launcher3.testing.TestProtocol;
 
 /**
  * Drag controller for Launcher activity
@@ -65,6 +67,9 @@
             float initialDragViewScale,
             float dragViewScaleOnDrop,
             DragOptions options) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "5");
+        }
         if (PROFILE_DRAWING_DURING_DRAG) {
             android.os.Debug.startMethodTracing("Launcher");
         }
diff --git a/src/com/android/launcher3/notification/NotificationContainer.java b/src/com/android/launcher3/notification/NotificationContainer.java
new file mode 100644
index 0000000..9eb05cd
--- /dev/null
+++ b/src/com/android/launcher3/notification/NotificationContainer.java
@@ -0,0 +1,283 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.notification;
+
+import static com.android.launcher3.anim.Interpolators.scrollInterpolatorForVelocity;
+import static com.android.launcher3.touch.SingleAxisSwipeDetector.HORIZONTAL;
+
+import android.animation.Animator;
+import android.animation.AnimatorSet;
+import android.animation.ObjectAnimator;
+import android.content.Context;
+import android.graphics.Rect;
+import android.util.AttributeSet;
+import android.util.FloatProperty;
+import android.view.MotionEvent;
+import android.view.View;
+import android.widget.FrameLayout;
+
+import com.android.launcher3.R;
+import com.android.launcher3.anim.AnimationSuccessListener;
+import com.android.launcher3.popup.PopupContainerWithArrow;
+import com.android.launcher3.touch.BaseSwipeDetector;
+import com.android.launcher3.touch.OverScroll;
+import com.android.launcher3.touch.SingleAxisSwipeDetector;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * Class to manage the notification UI in a {@link PopupContainerWithArrow}.
+ *
+ * - Has two {@link NotificationMainView} that represent the top two notifications
+ * - Handles dismissing a notification
+ */
+public class NotificationContainer extends FrameLayout implements SingleAxisSwipeDetector.Listener {
+
+    private static final FloatProperty<NotificationContainer> DRAG_TRANSLATION_X =
+            new FloatProperty<NotificationContainer>("notificationProgress") {
+                @Override
+                public void setValue(NotificationContainer view, float transX) {
+                    view.setDragTranslationX(transX);
+                }
+
+                @Override
+                public Float get(NotificationContainer view) {
+                    return view.mDragTranslationX;
+                }
+            };
+
+    private static final Rect sTempRect = new Rect();
+
+    private final SingleAxisSwipeDetector mSwipeDetector;
+    private final List<NotificationInfo> mNotificationInfos = new ArrayList<>();
+    private boolean mIgnoreTouch = false;
+
+    private final ObjectAnimator mContentTranslateAnimator;
+    private float mDragTranslationX = 0;
+
+    private final NotificationMainView mPrimaryView;
+    private final NotificationMainView mSecondaryView;
+    private PopupContainerWithArrow mPopupContainer;
+
+    public NotificationContainer(Context context) {
+        this(context, null, 0);
+    }
+
+    public NotificationContainer(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public NotificationContainer(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        mSwipeDetector = new SingleAxisSwipeDetector(getContext(), this, HORIZONTAL);
+        mSwipeDetector.setDetectableScrollConditions(SingleAxisSwipeDetector.DIRECTION_BOTH, false);
+        mContentTranslateAnimator = ObjectAnimator.ofFloat(this, DRAG_TRANSLATION_X, 0);
+
+        mPrimaryView = (NotificationMainView) View.inflate(getContext(),
+                R.layout.notification_content, null);
+        mSecondaryView = (NotificationMainView) View.inflate(getContext(),
+                R.layout.notification_content, null);
+        mSecondaryView.setAlpha(0);
+
+        addView(mSecondaryView);
+        addView(mPrimaryView);
+
+    }
+
+    public void setPopupView(PopupContainerWithArrow popupView) {
+        mPopupContainer = popupView;
+    }
+
+    /**
+     * Returns true if we should intercept the swipe.
+     */
+    public boolean onInterceptSwipeEvent(MotionEvent ev) {
+        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
+            sTempRect.set(getLeft(), getTop(), getRight(), getBottom());
+            mIgnoreTouch = !sTempRect.contains((int) ev.getX(), (int) ev.getY());
+            if (!mIgnoreTouch) {
+                mPopupContainer.getParent().requestDisallowInterceptTouchEvent(true);
+            }
+        }
+        if (mIgnoreTouch) {
+            return false;
+        }
+        if (mPrimaryView.getNotificationInfo() == null) {
+            // The notification hasn't been populated yet.
+            return false;
+        }
+
+        mSwipeDetector.onTouchEvent(ev);
+        return mSwipeDetector.isDraggingOrSettling();
+    }
+
+    /**
+     * Returns true when we should handle the swipe.
+     */
+    public boolean onSwipeEvent(MotionEvent ev) {
+        if (mIgnoreTouch) {
+            return false;
+        }
+        if (mPrimaryView.getNotificationInfo() == null) {
+            // The notification hasn't been populated yet.
+            return false;
+        }
+        return mSwipeDetector.onTouchEvent(ev);
+    }
+
+    /**
+     * Applies the list of @param notificationInfos to this container.
+     */
+    public void applyNotificationInfos(final List<NotificationInfo> notificationInfos) {
+        mNotificationInfos.clear();
+        if (notificationInfos.isEmpty()) {
+            mPrimaryView.applyNotificationInfo(null);
+            mSecondaryView.applyNotificationInfo(null);
+            return;
+        }
+        mNotificationInfos.addAll(notificationInfos);
+
+        NotificationInfo mainNotification = notificationInfos.get(0);
+        mPrimaryView.applyNotificationInfo(mainNotification);
+        mSecondaryView.applyNotificationInfo(notificationInfos.size() > 1
+                ? notificationInfos.get(1)
+                : null);
+    }
+
+    /**
+     * Trims the notifications.
+     * @param notificationKeys List of all valid notification keys.
+     */
+    public void trimNotifications(final List<String> notificationKeys) {
+        Iterator<NotificationInfo> iterator = mNotificationInfos.iterator();
+        while (iterator.hasNext()) {
+            if (!notificationKeys.contains(iterator.next().notificationKey)) {
+                iterator.remove();
+            }
+        }
+
+        NotificationInfo primaryInfo = mNotificationInfos.size() > 0
+                ? mNotificationInfos.get(0)
+                : null;
+        NotificationInfo secondaryInfo = mNotificationInfos.size() > 1
+                ? mNotificationInfos.get(1)
+                : null;
+
+        mPrimaryView.applyNotificationInfo(primaryInfo);
+        mSecondaryView.applyNotificationInfo(secondaryInfo);
+
+        mPrimaryView.onPrimaryDrag(0);
+        mSecondaryView.onSecondaryDrag(0);
+    }
+
+    private void setDragTranslationX(float translationX) {
+        mDragTranslationX = translationX;
+
+        float progress = translationX / getWidth();
+        mPrimaryView.onPrimaryDrag(progress);
+        if (mSecondaryView.getNotificationInfo() == null) {
+            mSecondaryView.setAlpha(0f);
+        } else {
+            mSecondaryView.onSecondaryDrag(progress);
+        }
+    }
+
+    // SingleAxisSwipeDetector.Listener's
+    @Override
+    public void onDragStart(boolean start, float startDisplacement) {
+        mPopupContainer.showArrow(false);
+    }
+
+    @Override
+    public boolean onDrag(float displacement) {
+        if (!mPrimaryView.canChildBeDismissed()) {
+            displacement = OverScroll.dampedScroll(displacement, getWidth());
+        }
+
+        float progress = displacement / getWidth();
+        mPrimaryView.onPrimaryDrag(progress);
+        if (mSecondaryView.getNotificationInfo() == null) {
+            mSecondaryView.setAlpha(0f);
+        } else {
+            mSecondaryView.onSecondaryDrag(progress);
+        }
+        mContentTranslateAnimator.cancel();
+        return true;
+    }
+
+    @Override
+    public void onDragEnd(float velocity) {
+        final boolean willExit;
+        final float endTranslation;
+        final float startTranslation = mPrimaryView.getTranslationX();
+        final float width = getWidth();
+
+        if (!mPrimaryView.canChildBeDismissed()) {
+            willExit = false;
+            endTranslation = 0;
+        } else if (mSwipeDetector.isFling(velocity)) {
+            willExit = true;
+            endTranslation = velocity < 0 ? -width : width;
+        } else if (Math.abs(startTranslation) > width / 2f) {
+            willExit = true;
+            endTranslation = (startTranslation < 0 ? -width : width);
+        } else {
+            willExit = false;
+            endTranslation = 0;
+        }
+
+        long duration = BaseSwipeDetector.calculateDuration(velocity,
+                (endTranslation - startTranslation) / width);
+
+        mContentTranslateAnimator.removeAllListeners();
+        mContentTranslateAnimator.setDuration(duration)
+                .setInterpolator(scrollInterpolatorForVelocity(velocity));
+        mContentTranslateAnimator.setFloatValues(startTranslation, endTranslation);
+
+        NotificationMainView current = mPrimaryView;
+        mContentTranslateAnimator.addListener(new AnimationSuccessListener() {
+            @Override
+            public void onAnimationSuccess(Animator animator) {
+                mSwipeDetector.finishedScrolling();
+                if (willExit) {
+                    current.onChildDismissed();
+                }
+                mPopupContainer.showArrow(true);
+            }
+        });
+        mContentTranslateAnimator.start();
+    }
+
+    /**
+     * Animates the background color to a new color.
+     * @param color The color to change to.
+     * @param animatorSetOut The AnimatorSet where we add the color animator to.
+     */
+    public void updateBackgroundColor(int color, AnimatorSet animatorSetOut) {
+        mPrimaryView.updateBackgroundColor(color, animatorSetOut);
+        mSecondaryView.updateBackgroundColor(color, animatorSetOut);
+    }
+
+    /**
+     * Updates the header with a new @param notificationCount.
+     */
+    public void updateHeader(int notificationCount) {
+        mPrimaryView.updateHeader(notificationCount);
+        mSecondaryView.updateHeader(notificationCount - 1);
+    }
+}
diff --git a/src/com/android/launcher3/notification/NotificationItemView.java b/src/com/android/launcher3/notification/NotificationItemView.java
deleted file mode 100644
index af943a6..0000000
--- a/src/com/android/launcher3/notification/NotificationItemView.java
+++ /dev/null
@@ -1,179 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.launcher3.notification;
-
-import android.animation.AnimatorSet;
-import android.content.Context;
-import android.graphics.Outline;
-import android.graphics.Rect;
-import android.view.MotionEvent;
-import android.view.View;
-import android.view.ViewGroup;
-import android.view.ViewGroup.MarginLayoutParams;
-import android.view.ViewOutlineProvider;
-import android.widget.TextView;
-
-import com.android.launcher3.R;
-import com.android.launcher3.popup.PopupContainerWithArrow;
-import com.android.launcher3.util.Themes;
-
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Utility class to manage notification UI
- */
-public class NotificationItemView {
-
-    private static final Rect sTempRect = new Rect();
-
-    private final Context mContext;
-    private final PopupContainerWithArrow mPopupContainer;
-    private final ViewGroup mRootView;
-
-    private final TextView mHeaderCount;
-    private final NotificationMainView mMainView;
-
-    private final View mHeader;
-
-    private View mGutter;
-
-    private boolean mIgnoreTouch = false;
-    private List<NotificationInfo> mNotificationInfos = new ArrayList<>();
-
-    public NotificationItemView(PopupContainerWithArrow container, ViewGroup rootView) {
-        mPopupContainer = container;
-        mRootView = rootView;
-        mContext = container.getContext();
-
-        mHeaderCount = container.findViewById(R.id.notification_count);
-        mMainView = container.findViewById(R.id.main_view);
-
-        mHeader = container.findViewById(R.id.header);
-
-        float radius = Themes.getDialogCornerRadius(mContext);
-        rootView.setClipToOutline(true);
-        rootView.setOutlineProvider(new ViewOutlineProvider() {
-            @Override
-            public void getOutline(View view, Outline outline) {
-                outline.setRoundRect(0, 0, view.getWidth(), view.getHeight(), radius);
-            }
-        });
-    }
-
-    /**
-     * Animates the background color to a new color.
-     * @param color The color to change to.
-     * @param animatorSetOut The AnimatorSet where we add the color animator to.
-     */
-    public void updateBackgroundColor(int color, AnimatorSet animatorSetOut) {
-        mMainView.updateBackgroundColor(color, animatorSetOut);
-    }
-
-    public void addGutter() {
-        if (mGutter == null) {
-            mGutter = mPopupContainer.inflateAndAdd(R.layout.notification_gutter, mRootView);
-        }
-    }
-
-    public void inverseGutterMargin() {
-        MarginLayoutParams lp = (MarginLayoutParams) mGutter.getLayoutParams();
-        int top = lp.topMargin;
-        lp.topMargin = lp.bottomMargin;
-        lp.bottomMargin = top;
-    }
-
-    public void removeAllViews() {
-        mRootView.removeView(mMainView);
-        mRootView.removeView(mHeader);
-        if (mGutter != null) {
-            mRootView.removeView(mGutter);
-        }
-    }
-
-    /**
-     * Updates the header text.
-     * @param notificationCount The number of notifications.
-     */
-    public void updateHeader(int notificationCount) {
-        final String text;
-        final int visibility;
-        if (notificationCount <= 1) {
-            text = "";
-            visibility = View.INVISIBLE;
-        } else {
-            text = String.valueOf(notificationCount);
-            visibility = View.VISIBLE;
-
-        }
-        mHeaderCount.setText(text);
-        mHeaderCount.setVisibility(visibility);
-    }
-
-    public boolean onInterceptTouchEvent(MotionEvent ev) {
-        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
-            sTempRect.set(mRootView.getLeft(), mRootView.getTop(),
-                    mRootView.getRight(), mRootView.getBottom());
-            mIgnoreTouch = !sTempRect.contains((int) ev.getX(), (int) ev.getY());
-            if (!mIgnoreTouch) {
-                mPopupContainer.getParent().requestDisallowInterceptTouchEvent(true);
-            }
-        }
-        if (mIgnoreTouch) {
-            return false;
-        }
-        if (mMainView.getNotificationInfo() == null) {
-            // The notification hasn't been populated yet.
-            return false;
-        }
-
-        return false;
-    }
-
-    public void applyNotificationInfos(final List<NotificationInfo> notificationInfos) {
-        mNotificationInfos.clear();
-        if (notificationInfos.isEmpty()) {
-            return;
-        }
-        mNotificationInfos.addAll(notificationInfos);
-
-        NotificationInfo mainNotification = notificationInfos.get(0);
-        mMainView.applyNotificationInfo(mainNotification, false);
-    }
-
-    public void trimNotifications(final List<String> notificationKeys) {
-        NotificationInfo currentMainNotificationInfo = mMainView.getNotificationInfo();
-        boolean shouldUpdateMainNotification = !notificationKeys.contains(
-                currentMainNotificationInfo.notificationKey);
-
-        if (shouldUpdateMainNotification) {
-            int size = notificationKeys.size();
-            NotificationInfo nextNotification = null;
-            // We get the latest notification by finding the notification after the one that was
-            // just dismissed.
-            for (int i = 0; i < size; ++i) {
-                if (currentMainNotificationInfo == mNotificationInfos.get(i) && i + 1 < size) {
-                    nextNotification = mNotificationInfos.get(i + 1);
-                    break;
-                }
-            }
-            if (nextNotification != null) {
-                mMainView.applyNotificationInfo(nextNotification, true);
-            }
-        }
-    }
-}
diff --git a/src/com/android/launcher3/notification/NotificationMainView.java b/src/com/android/launcher3/notification/NotificationMainView.java
index b8aa824..f9ff8a6 100644
--- a/src/com/android/launcher3/notification/NotificationMainView.java
+++ b/src/com/android/launcher3/notification/NotificationMainView.java
@@ -16,62 +16,70 @@
 
 package com.android.launcher3.notification;
 
+import static com.android.launcher3.Utilities.mapToRange;
+import static com.android.launcher3.anim.Interpolators.LINEAR;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_NOTIFICATION_DISMISSED;
 
 import android.animation.AnimatorSet;
-import android.animation.ObjectAnimator;
 import android.animation.ValueAnimator;
 import android.annotation.TargetApi;
 import android.content.Context;
-import android.graphics.Color;
-import android.graphics.drawable.ColorDrawable;
+import android.graphics.Outline;
+import android.graphics.Rect;
+import android.graphics.drawable.GradientDrawable;
 import android.os.Build;
 import android.text.TextUtils;
 import android.util.AttributeSet;
-import android.util.FloatProperty;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.FrameLayout;
+import android.view.ViewOutlineProvider;
+import android.widget.LinearLayout;
 import android.widget.TextView;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
 import com.android.launcher3.model.data.ItemInfo;
-import com.android.launcher3.touch.SingleAxisSwipeDetector;
+import com.android.launcher3.util.Themes;
 
 /**
  * A {@link android.widget.FrameLayout} that contains a single notification,
  * e.g. icon + title + text.
  */
 @TargetApi(Build.VERSION_CODES.N)
-public class NotificationMainView extends FrameLayout {
-
-    private static final FloatProperty<NotificationMainView> CONTENT_TRANSLATION =
-            new FloatProperty<NotificationMainView>("contentTranslation") {
-        @Override
-        public void setValue(NotificationMainView view, float v) {
-            view.setContentTranslation(v);
-        }
-
-        @Override
-        public Float get(NotificationMainView view) {
-            return view.mTextAndBackground.getTranslationX();
-        }
-    };
+public class NotificationMainView extends LinearLayout {
 
     // This is used only to track the notification view, so that it can be properly logged.
     public static final ItemInfo NOTIFICATION_ITEM_INFO = new ItemInfo();
 
+    // Value when the primary notification main view will be gone (zero alpha).
+    private static final float PRIMARY_GONE_PROGRESS = 0.7f;
+    private static final float PRIMARY_MIN_PROGRESS = 0.40f;
+    private static final float PRIMARY_MAX_PROGRESS = 0.60f;
+    private static final float SECONDARY_MIN_PROGRESS = 0.30f;
+    private static final float SECONDARY_MAX_PROGRESS = 0.50f;
+    private static final float SECONDARY_CONTENT_MAX_PROGRESS = 0.6f;
+
     private NotificationInfo mNotificationInfo;
-    private ViewGroup mTextAndBackground;
     private int mBackgroundColor;
     private TextView mTitleView;
     private TextView mTextView;
     private View mIconView;
 
-    private SingleAxisSwipeDetector mSwipeDetector;
+    private View mHeader;
+    private View mMainView;
 
-    private final ColorDrawable mColorDrawable;
+    private TextView mHeaderCount;
+    private final Rect mOutline = new Rect();
+
+    // Space between notifications during swipe
+    private final int mNotificationSpace;
+    private final int mMaxTransX;
+    private final int mMaxElevation;
+
+    private final GradientDrawable mBackground;
 
     public NotificationMainView(Context context) {
         this(context, null, 0);
@@ -82,28 +90,77 @@
     }
 
     public NotificationMainView(Context context, AttributeSet attrs, int defStyle) {
-        super(context, attrs, defStyle);
+        this(context, attrs, defStyle, 0);
+    }
 
-        mColorDrawable = new ColorDrawable(Color.TRANSPARENT);
+    public NotificationMainView(Context context, AttributeSet attrs, int defStyle, int defStylRes) {
+        super(context, attrs, defStyle, defStylRes);
+
+        float outlineRadius = Themes.getDialogCornerRadius(context);
+
+        mBackground = new GradientDrawable();
+        mBackground.setColor(Themes.getAttrColor(context, R.attr.popupColorPrimary));
+        mBackground.setCornerRadius(outlineRadius);
+        setBackground(mBackground);
+
+        mMaxElevation = getResources().getDimensionPixelSize(R.dimen.deep_shortcuts_elevation);
+        setElevation(mMaxElevation);
+
+        mMaxTransX = getResources().getDimensionPixelSize(R.dimen.notification_max_trans);
+        mNotificationSpace = getResources().getDimensionPixelSize(R.dimen.notification_space);
+
+        setClipToOutline(true);
+        setOutlineProvider(new ViewOutlineProvider() {
+            @Override
+            public void getOutline(View view, Outline outline) {
+                outline.setRoundRect(mOutline, outlineRadius);
+            }
+        });
+    }
+
+    /**
+     * Updates the header text.
+     * @param notificationCount The number of notifications.
+     */
+    public void updateHeader(int notificationCount) {
+        final String text;
+        final int visibility;
+        if (notificationCount <= 1) {
+            text = "";
+            visibility = View.INVISIBLE;
+        } else {
+            text = String.valueOf(notificationCount);
+            visibility = View.VISIBLE;
+
+        }
+        mHeaderCount.setText(text);
+        mHeaderCount.setVisibility(visibility);
     }
 
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
 
-        mTextAndBackground = findViewById(R.id.text_and_background);
-        mTitleView = mTextAndBackground.findViewById(R.id.title);
-        mTextView = mTextAndBackground.findViewById(R.id.text);
+        ViewGroup textAndBackground = findViewById(R.id.text_and_background);
+        mTitleView = textAndBackground.findViewById(R.id.title);
+        mTextView = textAndBackground.findViewById(R.id.text);
         mIconView = findViewById(R.id.popup_item_icon);
+        mHeaderCount = findViewById(R.id.notification_count);
 
-        ColorDrawable colorBackground = (ColorDrawable) mTextAndBackground.getBackground();
-        updateBackgroundColor(colorBackground.getColor());
+        mHeader = findViewById(R.id.header);
+        mMainView = findViewById(R.id.main_view);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        mOutline.set(0, 0, getWidth(), getHeight());
+        invalidateOutline();
     }
 
     private void updateBackgroundColor(int color) {
         mBackgroundColor = color;
-        mColorDrawable.setColor(color);
-        mTextAndBackground.setBackground(mColorDrawable);
+        mBackground.setColor(color);
         if (mNotificationInfo != null) {
             mIconView.setBackground(mNotificationInfo.getIconForBackground(getContext(),
                     mBackgroundColor));
@@ -128,8 +185,11 @@
     /**
      * Sets the content of this view, animating it after a new icon shifts up if necessary.
      */
-    public void applyNotificationInfo(NotificationInfo mainNotification, boolean animate) {
-        mNotificationInfo = mainNotification;
+    public void applyNotificationInfo(NotificationInfo notificationInfo) {
+        mNotificationInfo = notificationInfo;
+        if (notificationInfo == null) {
+            return;
+        }
         NotificationListener listener = NotificationListener.getInstanceIfConnected();
         if (listener != null) {
             listener.setNotificationsShown(new String[] {mNotificationInfo.notificationKey});
@@ -149,25 +209,112 @@
         if (mNotificationInfo.intent != null) {
             setOnClickListener(mNotificationInfo);
         }
-        setContentTranslation(0);
+
         // Add a stub ItemInfo so that logging populates the correct container and item types
         // instead of DEFAULT_CONTAINERTYPE and DEFAULT_ITEMTYPE, respectively.
         setTag(NOTIFICATION_ITEM_INFO);
-        if (animate) {
-            ObjectAnimator.ofFloat(mTextAndBackground, ALPHA, 0, 1).setDuration(150).start();
+    }
+
+    /**
+     * Sets the alpha of only the child views.
+     */
+    public void setContentAlpha(float alpha) {
+        mHeader.setAlpha(alpha);
+        mMainView.setAlpha(alpha);
+    }
+
+    /**
+     * Sets the translation of only the child views.
+     */
+    public void setContentTranslationX(float transX) {
+        mHeader.setTranslationX(transX);
+        mMainView.setTranslationX(transX);
+    }
+
+    /**
+     * Updates the alpha, content alpha, and elevation of this view.
+     *
+     * @param progress Range from [0, 1] or [-1, 0]
+     *                 When 0: Full alpha
+     *                 When 1/-1: zero alpha
+     */
+    public void onPrimaryDrag(float progress) {
+        float absProgress = Math.abs(progress);
+        final int width = getWidth();
+
+        float min = PRIMARY_MIN_PROGRESS;
+        float max = PRIMARY_MAX_PROGRESS;
+
+        if (absProgress < min) {
+            setAlpha(1f);
+            setContentAlpha(1);
+            setElevation(mMaxElevation);
+        } else if (absProgress < max) {
+            setAlpha(1f);
+            setContentAlpha(mapToRange(absProgress, min, max, 1f, 0f, LINEAR));
+            setElevation(Utilities.mapToRange(absProgress, min, max, mMaxElevation, 0, LINEAR));
+        } else {
+            setAlpha(mapToRange(absProgress, max, PRIMARY_GONE_PROGRESS, 1f, 0f, LINEAR));
+            setContentAlpha(0f);
+            setElevation(0f);
         }
+
+        setTranslationX(width * progress);
     }
 
-    public void setContentTranslation(float translation) {
-        mTextAndBackground.setTranslationX(translation);
-        mIconView.setTranslationX(translation);
+    /**
+     * Updates the alpha, content alpha, elevation, and clipping of this view.
+     * @param progress Range from [0, 1] or [-1, 0]
+      *                 When 0: Smallest clipping, zero alpha
+      *                 When 1/-1: Full clip, full alpha
+     */
+    public void onSecondaryDrag(float progress) {
+        final float absProgress = Math.abs(progress);
+
+        float min = SECONDARY_MIN_PROGRESS;
+        float max = SECONDARY_MAX_PROGRESS;
+        float contentMax = SECONDARY_CONTENT_MAX_PROGRESS;
+
+        if (absProgress < min) {
+            setAlpha(0f);
+            setContentAlpha(0);
+            setElevation(0f);
+        } else if (absProgress < max) {
+            setAlpha(mapToRange(absProgress, min, max, 0, 1f, LINEAR));
+            setContentAlpha(0f);
+            setElevation(0f);
+        } else {
+            setAlpha(1f);
+            setContentAlpha(absProgress > contentMax
+                    ? 1f
+                    : mapToRange(absProgress, max, contentMax, 0, 1f, LINEAR));
+            setElevation(Utilities.mapToRange(absProgress, max, 1, 0, mMaxElevation, LINEAR));
+        }
+
+        final int width = getWidth();
+        int crop = (int) (width * absProgress);
+        int space = (int) (absProgress > PRIMARY_GONE_PROGRESS
+                ? mapToRange(absProgress, PRIMARY_GONE_PROGRESS, 1f, mNotificationSpace, 0, LINEAR)
+                : mNotificationSpace);
+        if (progress < 0) {
+            mOutline.left = Math.max(0, getWidth() - crop + space);
+            mOutline.right = getWidth();
+        } else {
+            mOutline.right = Math.min(getWidth(), crop - space);
+            mOutline.left = 0;
+        }
+
+        float contentTransX = mMaxTransX * (1f - absProgress);
+        setContentTranslationX(progress < 0
+                ? contentTransX
+                : -contentTransX);
+        invalidateOutline();
     }
 
-    public NotificationInfo getNotificationInfo() {
+    public @Nullable NotificationInfo getNotificationInfo() {
         return mNotificationInfo;
     }
 
-
     public boolean canChildBeDismissed() {
         return mNotificationInfo != null && mNotificationInfo.dismissable;
     }
diff --git a/src/com/android/launcher3/popup/ArrowPopup.java b/src/com/android/launcher3/popup/ArrowPopup.java
index 3bb49f5..112a24e 100644
--- a/src/com/android/launcher3/popup/ArrowPopup.java
+++ b/src/com/android/launcher3/popup/ArrowPopup.java
@@ -467,6 +467,13 @@
         return getMeasuredWidth() - mArrowOffsetHorizontal - mArrowWidth;
     }
 
+    /**
+     * @param show If true, shows arrow (when applicable), otherwise hides arrow.
+     */
+    public void showArrow(boolean show) {
+        mArrow.setVisibility(show && shouldAddArrow() ? VISIBLE : INVISIBLE);
+    }
+
     private void addArrow() {
         getPopupContainer().addView(mArrow);
         mArrow.setX(getX() + getArrowLeft());
diff --git a/src/com/android/launcher3/popup/PopupContainerWithArrow.java b/src/com/android/launcher3/popup/PopupContainerWithArrow.java
index 18f263a..bc3419a 100644
--- a/src/com/android/launcher3/popup/PopupContainerWithArrow.java
+++ b/src/com/android/launcher3/popup/PopupContainerWithArrow.java
@@ -58,8 +58,8 @@
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.ItemInfoWithIcon;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
+import com.android.launcher3.notification.NotificationContainer;
 import com.android.launcher3.notification.NotificationInfo;
-import com.android.launcher3.notification.NotificationItemView;
 import com.android.launcher3.notification.NotificationKeyData;
 import com.android.launcher3.popup.PopupDataProvider.PopupDataChangeListener;
 import com.android.launcher3.shortcuts.DeepShortcutView;
@@ -92,9 +92,8 @@
     private final int mStartDragThreshold;
 
     private BubbleTextView mOriginalIcon;
-    private NotificationItemView mNotificationItemView;
     private int mNumNotifications;
-    private ViewGroup mNotificationContainer;
+    private NotificationContainer mNotificationContainer;
 
     private ViewGroup mWidgetContainer;
 
@@ -128,8 +127,8 @@
         if (ev.getAction() == MotionEvent.ACTION_DOWN) {
             mInterceptTouchDown.set(ev.getX(), ev.getY());
         }
-        if (mNotificationItemView != null
-                && mNotificationItemView.onInterceptTouchEvent(ev)) {
+        if (mNotificationContainer != null
+                && mNotificationContainer.onInterceptSwipeEvent(ev)) {
             return true;
         }
         // Stop sending touch events to deep shortcut views if user moved beyond touch slop.
@@ -138,6 +137,14 @@
     }
 
     @Override
+    public boolean onTouchEvent(MotionEvent ev) {
+        if (mNotificationContainer != null) {
+            return mNotificationContainer.onSwipeEvent(ev) || super.onTouchEvent(ev);
+        }
+        return super.onTouchEvent(ev);
+    }
+
+    @Override
     protected boolean isOfType(int type) {
         return (type & TYPE_ACTION_POPUP) != 0;
     }
@@ -172,8 +179,8 @@
     @Override
     protected void setChildColor(View view, int color, AnimatorSet animatorSetOut) {
         super.setChildColor(view, color, animatorSetOut);
-        if (view.getId() == R.id.notification_container && mNotificationItemView != null) {
-            mNotificationItemView.updateBackgroundColor(color, animatorSetOut);
+        if (view.getId() == R.id.notification_container && mNotificationContainer != null) {
+            mNotificationContainer.updateBackgroundColor(color, animatorSetOut);
         }
     }
 
@@ -232,13 +239,6 @@
                 mNotificationContainer);
     }
 
-    @Override
-    protected void onInflationComplete(boolean isReversed) {
-        if (isReversed && mNotificationItemView != null) {
-            mNotificationItemView.inverseGutterMargin();
-        }
-    }
-
     @TargetApi(Build.VERSION_CODES.P)
     public void populateAndShow(final BubbleTextView originalIcon, int shortcutCount,
             final List<NotificationKeyData> notificationKeys, List<SystemShortcut> systemShortcuts) {
@@ -261,9 +261,10 @@
             if (mNotificationContainer == null) {
                 mNotificationContainer = findViewById(R.id.notification_container);
                 mNotificationContainer.setVisibility(VISIBLE);
+                mNotificationContainer.setPopupView(this);
+            } else {
+                mNotificationContainer.setVisibility(GONE);
             }
-            View.inflate(getContext(), R.layout.notification_content, mNotificationContainer);
-            mNotificationItemView = new NotificationItemView(this, mNotificationContainer);
             updateNotificationHeader();
         }
         int viewsToFlip = getChildCount();
@@ -274,10 +275,6 @@
         if (hasDeepShortcuts) {
             mDeepShortcutContainer.setVisibility(View.VISIBLE);
 
-            if (mNotificationItemView != null) {
-                mNotificationItemView.addGutter();
-            }
-
             for (int i = shortcutCount; i > 0; i--) {
                 DeepShortcutView v = inflateAndAdd(R.layout.deep_shortcut, mDeepShortcutContainer);
                 v.getLayoutParams().width = containerWidth;
@@ -309,10 +306,6 @@
         } else {
             mDeepShortcutContainer.setVisibility(View.GONE);
             if (!systemShortcuts.isEmpty()) {
-                if (mNotificationItemView != null) {
-                    mNotificationItemView.addGutter();
-                }
-
                 for (SystemShortcut shortcut : systemShortcuts) {
                     initializeSystemShortcut(R.layout.system_shortcut, this, shortcut);
                 }
@@ -355,13 +348,13 @@
     }
 
     public void applyNotificationInfos(List<NotificationInfo> notificationInfos) {
-        if (mNotificationItemView != null) {
-            mNotificationItemView.applyNotificationInfos(notificationInfos);
+        if (mNotificationContainer != null) {
+            mNotificationContainer.applyNotificationInfos(notificationInfos);
         }
     }
 
     private void updateHiddenShortcuts() {
-        int allowedCount = mNotificationItemView != null
+        int allowedCount = mNotificationContainer != null
                 ? MAX_SHORTCUTS_IF_NOTIFICATIONS : MAX_SHORTCUTS;
 
         int total = mShortcuts.size();
@@ -447,8 +440,8 @@
     private void updateNotificationHeader() {
         ItemInfoWithIcon itemInfo = (ItemInfoWithIcon) mOriginalIcon.getTag();
         DotInfo dotInfo = mLauncher.getDotInfoForItem(itemInfo);
-        if (mNotificationItemView != null && dotInfo != null) {
-            mNotificationItemView.updateHeader(dotInfo.getNotificationCount());
+        if (mNotificationContainer != null && dotInfo != null) {
+            mNotificationContainer.updateHeader(dotInfo.getNotificationCount());
         }
     }
 
@@ -590,20 +583,18 @@
 
         @Override
         public void trimNotifications(Map<PackageUserKey, DotInfo> updatedDots) {
-            if (mNotificationItemView == null) {
+            if (mNotificationContainer == null) {
                 return;
             }
             ItemInfo originalInfo = (ItemInfo) mOriginalIcon.getTag();
             DotInfo dotInfo = updatedDots.get(PackageUserKey.fromItemInfo(originalInfo));
             if (dotInfo == null || dotInfo.getNotificationKeys().size() == 0) {
                 // No more notifications, remove the notification views and expand all shortcuts.
-                mNotificationItemView.removeAllViews();
-                mNotificationItemView = null;
                 mNotificationContainer.setVisibility(GONE);
                 updateHiddenShortcuts();
                 assignMarginsAndBackgrounds(PopupContainerWithArrow.this);
             } else {
-                mNotificationItemView.trimNotifications(
+                mNotificationContainer.trimNotifications(
                         NotificationKeyData.extractKeysOnly(dotInfo.getNotificationKeys()));
             }
         }
diff --git a/src/com/android/launcher3/testing/TestProtocol.java b/src/com/android/launcher3/testing/TestProtocol.java
index c484811..ed52e20 100644
--- a/src/com/android/launcher3/testing/TestProtocol.java
+++ b/src/com/android/launcher3/testing/TestProtocol.java
@@ -117,7 +117,7 @@
     public static final String PERMANENT_DIAG_TAG = "TaplTarget";
     public static final String WORK_PROFILE_REMOVED = "b/159671700";
     public static final String FALLBACK_ACTIVITY_NO_SET = "b/181019015";
-    public static final String THIRD_PARTY_LAUNCHER_NOT_SET = "b/187080582";
     public static final String TASK_VIEW_ID_CRASH = "b/195430732";
     public static final String L3_SWIPE_TO_HOME = "b/192018189";
+    public static final String NO_DROP_TARGET = "b/195031154";
 }
diff --git a/src/com/android/launcher3/widget/BaseWidgetSheet.java b/src/com/android/launcher3/widget/BaseWidgetSheet.java
index b6cec12..00a0050 100644
--- a/src/com/android/launcher3/widget/BaseWidgetSheet.java
+++ b/src/com/android/launcher3/widget/BaseWidgetSheet.java
@@ -19,6 +19,7 @@
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.util.AttributeSet;
+import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnLongClickListener;
@@ -108,6 +109,9 @@
 
     @Override
     public boolean onLongClick(View v) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "1");
+        }
         TestLogging.recordEvent(TestProtocol.SEQUENCE_MAIN, "Widgets.onLongClick");
         v.cancelLongPress();
         if (!ItemLongClickListener.canStartDrag(mActivityContext)) return false;
@@ -178,6 +182,9 @@
     }
 
     private boolean beginDraggingWidget(WidgetCell v) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "2");
+        }
         // Get the widget preview as the drag representation
         WidgetImageView image = v.getWidgetView();
 
diff --git a/src/com/android/launcher3/widget/PendingItemDragHelper.java b/src/com/android/launcher3/widget/PendingItemDragHelper.java
index 2347d28..463f4ac 100644
--- a/src/com/android/launcher3/widget/PendingItemDragHelper.java
+++ b/src/com/android/launcher3/widget/PendingItemDragHelper.java
@@ -22,6 +22,7 @@
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.util.Log;
 import android.util.Size;
 import android.view.View;
 import android.view.View.MeasureSpec;
@@ -41,6 +42,7 @@
 import com.android.launcher3.icons.FastBitmapDrawable;
 import com.android.launcher3.icons.LauncherIcons;
 import com.android.launcher3.icons.RoundDrawableWrapper;
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.widget.dragndrop.AppWidgetHostViewDragListener;
 import com.android.launcher3.widget.util.WidgetSizes;
 
@@ -94,6 +96,9 @@
      */
     public void startDrag(Rect previewBounds, int previewBitmapWidth, int previewViewWidth,
             Point screenPos, DragSource source, DragOptions options) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.NO_DROP_TARGET, "3");
+        }
         final Launcher launcher = Launcher.getLauncher(mView.getContext());
         LauncherAppState app = LauncherAppState.getInstance(launcher);