Merge "Remove unused DHCP timeout event tag." into nyc-dev
diff --git a/core/java/android/hardware/input/InputDeviceIdentifier.java b/core/java/android/hardware/input/InputDeviceIdentifier.java
index 5e832e3..801da88 100644
--- a/core/java/android/hardware/input/InputDeviceIdentifier.java
+++ b/core/java/android/hardware/input/InputDeviceIdentifier.java
@@ -16,8 +16,11 @@
 
 package android.hardware.input;
 
+import java.util.Objects;
+
 import android.os.Parcel;
 import android.os.Parcelable;
+import android.text.TextUtils;
 
 /**
  * Wrapper for passing identifying information for input devices.
@@ -65,6 +68,21 @@
         return mProductId;
     }
 
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || !(o instanceof InputDeviceIdentifier)) return false;
+
+        final InputDeviceIdentifier that = (InputDeviceIdentifier) o;
+        return ((mVendorId == that.mVendorId) && (mProductId == that.mProductId)
+                && TextUtils.equals(mDescriptor, that.mDescriptor));
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mDescriptor, mVendorId, mProductId);
+    }
+
     public static final Parcelable.Creator<InputDeviceIdentifier> CREATOR =
             new Parcelable.Creator<InputDeviceIdentifier>() {
 
diff --git a/packages/DocumentsUI/src/com/android/documentsui/OpenExternalDirectoryActivity.java b/packages/DocumentsUI/src/com/android/documentsui/OpenExternalDirectoryActivity.java
index 854be0b..b0e5e4e 100644
--- a/packages/DocumentsUI/src/com/android/documentsui/OpenExternalDirectoryActivity.java
+++ b/packages/DocumentsUI/src/com/android/documentsui/OpenExternalDirectoryActivity.java
@@ -212,6 +212,12 @@
                 break;
             }
         }
+        if (internalRoot == null) {
+            // Should not happen on normal circumstances, unless app crafted an invalid volume
+            // using reflection or the list of mounted volumes changed.
+            Log.e(TAG, "Didn't find right volume for '" + storageVolume.dump() + "' on " + volumes);
+            return false;
+        }
 
         // Checks if the user has granted the permission already.
         final Intent intent = getIntentForExistingPermission(activity, isRoot, internalRoot, file);
diff --git a/packages/SystemUI/res/layout/brightness_mirror.xml b/packages/SystemUI/res/layout/brightness_mirror.xml
new file mode 100644
index 0000000..bbaff6a
--- /dev/null
+++ b/packages/SystemUI/res/layout/brightness_mirror.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2016 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
+  -->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/brightness_mirror"
+    android:layout_width="@dimen/notification_panel_width"
+    android:layout_height="wrap_content"
+    android:layout_gravity="@integer/notification_panel_layout_gravity"
+    android:visibility="invisible">
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@drawable/brightness_mirror_background"
+        android:elevation="2dp">
+        <include layout="@layout/quick_settings_brightness_dialog"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"/>
+    </FrameLayout>
+</FrameLayout>
diff --git a/packages/SystemUI/res/layout/recents_stack_action_button.xml b/packages/SystemUI/res/layout/recents_stack_action_button.xml
index 625e9c1..43b3de1 100644
--- a/packages/SystemUI/res/layout/recents_stack_action_button.xml
+++ b/packages/SystemUI/res/layout/recents_stack_action_button.xml
@@ -32,4 +32,5 @@
     android:shadowRadius="5"
     android:fontFamily="sans-serif-medium"
     android:background="?android:selectableItemBackground"
-    android:visibility="invisible" />
+    android:visibility="invisible"
+    android:forceHasOverlappingRendering="false" />
diff --git a/packages/SystemUI/res/layout/signal_cluster_view.xml b/packages/SystemUI/res/layout/signal_cluster_view.xml
index 9df5dbf..d17601c 100644
--- a/packages/SystemUI/res/layout/signal_cluster_view.xml
+++ b/packages/SystemUI/res/layout/signal_cluster_view.xml
@@ -19,6 +19,7 @@
 <!-- extends LinearLayout -->
 <com.android.systemui.statusbar.SignalClusterView
     xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/signal_cluster"
     android:layout_height="match_parent"
     android:layout_width="wrap_content"
     android:gravity="center_vertical"
diff --git a/packages/SystemUI/res/layout/super_status_bar.xml b/packages/SystemUI/res/layout/super_status_bar.xml
index 7c4ce15..285a8ec 100644
--- a/packages/SystemUI/res/layout/super_status_bar.xml
+++ b/packages/SystemUI/res/layout/super_status_bar.xml
@@ -62,21 +62,7 @@
         android:layout_width="match_parent"
         android:layout_height="@dimen/status_bar_height" />
 
-    <FrameLayout android:id="@+id/brightness_mirror"
-                 android:layout_width="@dimen/notification_panel_width"
-                 android:layout_height="wrap_content"
-                 android:layout_gravity="@integer/notification_panel_layout_gravity"
-                 android:visibility="invisible">
-        <FrameLayout
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:elevation="2dp"
-                android:background="@drawable/brightness_mirror_background">
-            <include layout="@layout/quick_settings_brightness_dialog"
-                     android:layout_width="match_parent"
-                     android:layout_height="wrap_content" />
-        </FrameLayout>
-    </FrameLayout>
+    <include layout="@layout/brightness_mirror" />
 
     <ViewStub android:id="@+id/fullscreen_user_switcher_stub"
               android:layout="@layout/car_fullscreen_user_switcher"
diff --git a/packages/SystemUI/res/layout/system_icons.xml b/packages/SystemUI/res/layout/system_icons.xml
index e9448db..3a33992 100644
--- a/packages/SystemUI/res/layout/system_icons.xml
+++ b/packages/SystemUI/res/layout/system_icons.xml
@@ -27,7 +27,6 @@
         android:orientation="horizontal"/>
 
     <include layout="@layout/signal_cluster_view"
-        android:id="@+id/signal_cluster"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="@dimen/signal_cluster_margin_start"/>
diff --git a/packages/SystemUI/res/values/dimens.xml b/packages/SystemUI/res/values/dimens.xml
index 03b9837..5043610 100644
--- a/packages/SystemUI/res/values/dimens.xml
+++ b/packages/SystemUI/res/values/dimens.xml
@@ -640,6 +640,9 @@
     <!-- The amount of overscroll allowed when flinging to the end of the stack. -->
     <dimen name="recents_fling_overscroll_distance">24dp</dimen>
 
+    <!-- The size of the drag hint text. -->
+    <dimen name="recents_drag_hint_text_size">14sp</dimen>
+
     <!-- The min alpha to apply to a task affiliation group color. -->
     <item name="recents_task_affiliation_color_min_alpha_percentage" format="float" type="dimen">0.6</item>
 
diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index 37b00bb..a03aa28 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -737,6 +737,8 @@
     <string name="recents_stack_action_button_label">Clear all</string>
     <!-- Recents: Incompatible task message. [CHAR LIMIT=NONE] -->
     <string name="recents_incompatible_app_message">App doesn\'t support split screen</string>
+    <!-- Recents: Hint text that shows on the drop targets to start multiwindow. [CHAR LIMIT=NONE] -->
+    <string name="recents_drag_hint_message">Drag here to use split screen</string>
 
     <!-- Recents: MultiStack add stack split horizontal radio button. [CHAR LIMIT=NONE] -->
     <string name="recents_multistack_add_stack_dialog_split_horizontal">Split Horizontal</string>
diff --git a/packages/SystemUI/src/com/android/systemui/SwipeHelper.java b/packages/SystemUI/src/com/android/systemui/SwipeHelper.java
index e838191..9a6fa9c 100644
--- a/packages/SystemUI/src/com/android/systemui/SwipeHelper.java
+++ b/packages/SystemUI/src/com/android/systemui/SwipeHelper.java
@@ -51,11 +51,9 @@
     private float SWIPE_ESCAPE_VELOCITY = 100f; // dp/sec
     private int DEFAULT_ESCAPE_ANIMATION_DURATION = 200; // ms
     private int MAX_ESCAPE_ANIMATION_DURATION = 400; // ms
-    private int MAX_DISMISS_VELOCITY = 2000; // dp/sec
+    private int MAX_DISMISS_VELOCITY = 4000; // dp/sec
     private static final int SNAP_ANIM_LEN = SLOW_ANIMATIONS ? 1000 : 150; // ms
 
-    public static float SWIPE_PROGRESS_FADE_START = 0f; // fraction of thumbnail width
-                                                 // where fade starts
     static final float SWIPE_PROGRESS_FADE_END = 0.5f; // fraction of thumbnail width
                                               // beyond which swipe progress->0
     private float mMinSwipeProgress = 0f;
@@ -102,8 +100,7 @@
         mFalsingThreshold = context.getResources().getDimensionPixelSize(
                 R.dimen.swipe_helper_falsing_threshold);
         mFalsingManager = FalsingManager.getInstance(context);
-        mFlingAnimationUtils = new FlingAnimationUtils(context,
-                MAX_ESCAPE_ANIMATION_DURATION / 1000f /* maxLengthSeconds */);
+        mFlingAnimationUtils = new FlingAnimationUtils(context, getMaxEscapeAnimDuration() / 1000f);
     }
 
     public void setLongPressListener(LongPressListener listener) {
@@ -183,21 +180,23 @@
         mMaxSwipeProgress = maxSwipeProgress;
     }
 
-    private float getSwipeProgressForOffset(View view) {
+    private float getSwipeProgressForOffset(View view, float translation) {
         float viewSize = getSize(view);
-        final float fadeSize = SWIPE_PROGRESS_FADE_END * viewSize;
-        float result = 1.0f;
-        float pos = getTranslation(view);
-        if (pos >= viewSize * SWIPE_PROGRESS_FADE_START) {
-            result = 1.0f - (pos - viewSize * SWIPE_PROGRESS_FADE_START) / fadeSize;
-        } else if (pos < viewSize * (1.0f - SWIPE_PROGRESS_FADE_START)) {
-            result = 1.0f + (viewSize * SWIPE_PROGRESS_FADE_START + pos) / fadeSize;
-        }
+        float result = Math.abs(translation / viewSize);
         return Math.min(Math.max(mMinSwipeProgress, result), mMaxSwipeProgress);
     }
 
+    private float getSwipeAlpha(float progress) {
+        return Math.min(0, Math.max(1, progress / SWIPE_PROGRESS_FADE_END));
+    }
+
     private void updateSwipeProgressFromOffset(View animView, boolean dismissable) {
-        float swipeProgress = getSwipeProgressForOffset(animView);
+        updateSwipeProgressFromOffset(animView, dismissable, getTranslation(animView));
+    }
+
+    private void updateSwipeProgressFromOffset(View animView, boolean dismissable,
+            float translation) {
+        float swipeProgress = getSwipeProgressForOffset(animView, translation);
         if (!mCallback.updateSwipeProgress(animView, dismissable, swipeProgress)) {
             if (FADE_OUT_DURING_SWIPE && dismissable) {
                 float alpha = swipeProgress;
@@ -208,7 +207,7 @@
                         animView.setLayerType(View.LAYER_TYPE_NONE, null);
                     }
                 }
-                animView.setAlpha(getSwipeProgressForOffset(animView));
+                animView.setAlpha(getSwipeAlpha(swipeProgress));
             }
         }
         invalidateGlobalRegion(animView);
@@ -485,7 +484,7 @@
      * view is being animated to dismiss or snap.
      */
     public void onTranslationUpdate(View animView, float value, boolean canBeDismissed) {
-        updateSwipeProgressFromOffset(animView, canBeDismissed);
+        updateSwipeProgressFromOffset(animView, canBeDismissed, value);
     }
 
     private void snapChildInstantly(final View view) {
@@ -600,7 +599,15 @@
     }
 
     protected float getEscapeVelocity() {
-        return SWIPE_ESCAPE_VELOCITY * mDensityScale;
+        return getUnscaledEscapeVelocity() * mDensityScale;
+    }
+
+    protected float getUnscaledEscapeVelocity() {
+        return SWIPE_ESCAPE_VELOCITY;
+    }
+
+    protected long getMaxEscapeAnimDuration() {
+        return MAX_ESCAPE_ANIMATION_DURATION;
     }
 
     protected boolean swipedFarEnough() {
diff --git a/packages/SystemUI/src/com/android/systemui/qs/PageIndicator.java b/packages/SystemUI/src/com/android/systemui/qs/PageIndicator.java
index e050b0d..9239ded 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/PageIndicator.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/PageIndicator.java
@@ -120,9 +120,8 @@
         }
         ImageView first = (ImageView) getChildAt(firstIndex);
         ImageView second = (ImageView) getChildAt(secondIndex);
-        if (second == null) {
-            // Weird state where number of pages must not have propagated yet.
-            return;
+        if (first == null || second == null) {
+            // may happen during reInflation or other weird cases
         }
         // Lay the two views on top of each other.
         second.setTranslationX(first.getX() - second.getX());
diff --git a/packages/SystemUI/src/com/android/systemui/recents/RecentsActivity.java b/packages/SystemUI/src/com/android/systemui/recents/RecentsActivity.java
index 4d69280..2040833 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/RecentsActivity.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/RecentsActivity.java
@@ -99,6 +99,7 @@
     private RecentsPackageMonitor mPackageMonitor;
     private long mLastTabKeyEventTime;
     private int mLastDeviceOrientation = Configuration.ORIENTATION_UNDEFINED;
+    private int mLastDisplayDensity;
     private boolean mFinishedOnStartup;
     private boolean mIgnoreAltTabRelease;
     private boolean mIsVisible;
@@ -276,7 +277,9 @@
         getWindow().getAttributes().privateFlags |=
                 WindowManager.LayoutParams.PRIVATE_FLAG_FORCE_DECOR_VIEW_VISIBILITY;
 
-        mLastDeviceOrientation = Utilities.getAppConfiguration(this).orientation;
+        Configuration appConfiguration = Utilities.getAppConfiguration(this);
+        mLastDeviceOrientation = appConfiguration.orientation;
+        mLastDisplayDensity = appConfiguration.densityDpi;
         mFocusTimerDuration = getResources().getInteger(R.integer.recents_auto_advance_duration);
         mIterateTrigger = new DozeTrigger(mFocusTimerDuration, new Runnable() {
             @Override
@@ -349,7 +352,7 @@
         loader.loadTasks(this, loadPlan, loadOpts);
         TaskStack stack = loadPlan.getTaskStack();
         mRecentsView.onReload(mIsVisible, stack.getTaskCount() == 0);
-        mRecentsView.updateStack(stack);
+        mRecentsView.updateStack(stack, true /* setStackViewTasks */);
 
         // Update the nav bar scrim, but defer the animation until the enter-window event
         boolean animateNavBarScrim = !launchState.launchedViaDockGesture;
@@ -427,11 +430,13 @@
         super.onConfigurationChanged(newConfig);
 
         // Notify of the config change
-        int newDeviceOrientation = Utilities.getAppConfiguration(this).orientation;
+        Configuration newDeviceConfiguration = Utilities.getAppConfiguration(this);
         int numStackTasks = mRecentsView.getStack().getStackTaskCount();
         EventBus.getDefault().send(new ConfigurationChangedEvent(false /* fromMultiWindow */,
-                (mLastDeviceOrientation != newDeviceOrientation), numStackTasks > 0));
-        mLastDeviceOrientation = newDeviceOrientation;
+                mLastDeviceOrientation != newDeviceConfiguration.orientation,
+                mLastDisplayDensity != newDeviceConfiguration.densityDpi, numStackTasks > 0));
+        mLastDeviceOrientation = newDeviceConfiguration.orientation;
+        mLastDisplayDensity = newDeviceConfiguration.densityDpi;
     }
 
     @Override
@@ -454,14 +459,9 @@
         int numStackTasks = stack.getStackTaskCount();
 
         EventBus.getDefault().send(new ConfigurationChangedEvent(true /* fromMultiWindow */,
-                false /* fromDeviceOrientationChange */, numStackTasks > 0));
-
-        if (mRecentsView != null) {
-            mRecentsView.updateStack(stack);
-        }
-
-        EventBus.getDefault().send(new MultiWindowStateChangedEvent(isInMultiWindowMode,
+                false /* fromDeviceOrientationChange */, false /* fromDisplayDensityChange */,
                 numStackTasks > 0));
+        EventBus.getDefault().send(new MultiWindowStateChangedEvent(isInMultiWindowMode, stack));
     }
 
     @Override
diff --git a/packages/SystemUI/src/com/android/systemui/recents/RecentsImpl.java b/packages/SystemUI/src/com/android/systemui/recents/RecentsImpl.java
index 0413bc9..3ecada9 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/RecentsImpl.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/RecentsImpl.java
@@ -560,7 +560,7 @@
                 com.android.internal.R.dimen.navigation_bar_height);
         mNavBarWidth = res.getDimensionPixelSize(
                 com.android.internal.R.dimen.navigation_bar_width);
-        mTaskBarHeight = TaskStackLayoutAlgorithm.getDimensionForDevice(res,
+        mTaskBarHeight = TaskStackLayoutAlgorithm.getDimensionForDevice(mContext,
                 R.dimen.recents_task_view_header_height,
                 R.dimen.recents_task_view_header_height,
                 R.dimen.recents_task_view_header_height,
@@ -771,8 +771,9 @@
                     if (icon != null) {
                         icon.setCallback(null);
                     }
-                    mHeaderBar.rebindToTask(toTask, false /* touchExplorationEnabled */,
+                    mHeaderBar.bindToTask(toTask, false /* touchExplorationEnabled */,
                             disabledInSafeMode);
+                    mHeaderBar.onTaskDataLoaded();
                     mHeaderBar.setDimAlpha(toTransform.dimAlpha);
                     mHeaderBar.draw(c);
                     c.setBitmap(null);
diff --git a/packages/SystemUI/src/com/android/systemui/recents/events/activity/ConfigurationChangedEvent.java b/packages/SystemUI/src/com/android/systemui/recents/events/activity/ConfigurationChangedEvent.java
index 53b67cf..294c1e7 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/events/activity/ConfigurationChangedEvent.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/events/activity/ConfigurationChangedEvent.java
@@ -25,12 +25,14 @@
 
     public final boolean fromMultiWindow;
     public final boolean fromDeviceOrientationChange;
+    public final boolean fromDisplayDensityChange;
     public final boolean hasStackTasks;
 
     public ConfigurationChangedEvent(boolean fromMultiWindow, boolean fromDeviceOrientationChange,
-            boolean hasStackTasks) {
+            boolean fromDisplayDensityChange, boolean hasStackTasks) {
         this.fromMultiWindow = fromMultiWindow;
         this.fromDeviceOrientationChange = fromDeviceOrientationChange;
+        this.fromDisplayDensityChange = fromDisplayDensityChange;
         this.hasStackTasks = hasStackTasks;
     }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/recents/events/activity/MultiWindowStateChangedEvent.java b/packages/SystemUI/src/com/android/systemui/recents/events/activity/MultiWindowStateChangedEvent.java
index cf2a68e..11649fb 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/events/activity/MultiWindowStateChangedEvent.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/events/activity/MultiWindowStateChangedEvent.java
@@ -17,17 +17,18 @@
 package com.android.systemui.recents.events.activity;
 
 import com.android.systemui.recents.events.EventBus;
+import com.android.systemui.recents.model.TaskStack;
 
 /**
  * This is sent by the activity whenever the multi-window state has changed.
  */
-public class MultiWindowStateChangedEvent extends EventBus.Event {
+public class MultiWindowStateChangedEvent extends EventBus.AnimatedEvent {
 
     public final boolean inMultiWindow;
-    public final boolean hasStackTasks;
+    public final TaskStack stack;
 
-    public MultiWindowStateChangedEvent(boolean inMultiWindow, boolean hasStackTasks) {
+    public MultiWindowStateChangedEvent(boolean inMultiWindow, TaskStack stack) {
         this.inMultiWindow = inMultiWindow;
-        this.hasStackTasks = hasStackTasks;
+        this.stack = stack;
     }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/recents/misc/SystemServicesProxy.java b/packages/SystemUI/src/com/android/systemui/recents/misc/SystemServicesProxy.java
index 75d5ec5..6f1a69c 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/misc/SystemServicesProxy.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/misc/SystemServicesProxy.java
@@ -951,18 +951,6 @@
     }
 
     /**
-     * Returns the current display orientation.
-     */
-    public int getDisplayOrientation() {
-        // Because of multi-window, the configuration orientation does not necessarily reflect the
-        // orientation of the display, instead we just use the display's real-size.
-        Rect displayRect = getDisplayRect();
-        return displayRect.width() > displayRect.height()
-                ? Configuration.ORIENTATION_LANDSCAPE
-                : Configuration.ORIENTATION_PORTRAIT;
-    }
-
-    /**
      * Returns the window rect for the RecentsActivity, based on the dimensions of the home stack.
      */
     public Rect getWindowRect() {
diff --git a/packages/SystemUI/src/com/android/systemui/recents/model/RecentsTaskLoader.java b/packages/SystemUI/src/com/android/systemui/recents/model/RecentsTaskLoader.java
index 82c81ae..fb92971 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/model/RecentsTaskLoader.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/model/RecentsTaskLoader.java
@@ -353,23 +353,15 @@
 
     /**
      * Acquires the task resource data directly from the cache, loading if necessary.
-     *
-     * @param fetchAndInvalidateThumbnails If set, will try loading thumbnails, invalidating them
-     *                                     in the cache and loading if necessary. Otherwise, do not
-     *                                     load the thumbnail unless the icon also has to be loaded.
      */
-    public void loadTaskData(Task t, boolean fetchAndInvalidateThumbnails) {
+    public void loadTaskData(Task t) {
         Drawable icon = mIconCache.getAndInvalidateIfModified(t.key);
         Bitmap thumbnail = null;
         ActivityManager.TaskThumbnailInfo thumbnailInfo = null;
-        if (fetchAndInvalidateThumbnails) {
-            ThumbnailData thumbnailData = mThumbnailCache.getAndInvalidateIfModified(t.key);
-            if (thumbnailData != null) {
-                thumbnail = thumbnailData.thumbnail;
-                thumbnailInfo = thumbnailData.thumbnailInfo;
-            }
-        } else {
-            thumbnail = mDefaultThumbnail;
+        ThumbnailData thumbnailData = mThumbnailCache.getAndInvalidateIfModified(t.key);
+        if (thumbnailData != null) {
+            thumbnail = thumbnailData.thumbnail;
+            thumbnailInfo = thumbnailData.thumbnailInfo;
         }
 
         // Grab the thumbnail/icon from the cache, if either don't exist, then trigger a reload and
diff --git a/packages/SystemUI/src/com/android/systemui/recents/model/TaskStack.java b/packages/SystemUI/src/com/android/systemui/recents/model/TaskStack.java
index 95e276f..47995c4 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/model/TaskStack.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/model/TaskStack.java
@@ -30,17 +30,21 @@
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
-import android.animation.RectEvaluator;
+import android.annotation.IntDef;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.Resources;
+import android.graphics.Canvas;
 import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Point;
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.graphics.drawable.ColorDrawable;
 import android.util.ArrayMap;
 import android.util.ArraySet;
+import android.util.IntProperty;
 import android.util.SparseArray;
 import android.view.animation.Interpolator;
 
@@ -56,6 +60,8 @@
 import com.android.systemui.recents.views.TaskStackLayoutAlgorithm;
 
 import java.io.PrintWriter;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
@@ -240,22 +246,30 @@
      */
     public static class DockState implements DropTarget {
 
+        // The rotation to apply to the hint text
+        @Retention(RetentionPolicy.SOURCE)
+        @IntDef({HORIZONTAL, VERTICAL})
+        public @interface TextOrientation {}
+        private static final int HORIZONTAL = 0;
+        private static final int VERTICAL = 1;
+
         private static final int DOCK_AREA_ALPHA = 192;
-        public static final DockState NONE = new DockState(DOCKED_INVALID, -1, 80, null, null, null);
+        public static final DockState NONE = new DockState(DOCKED_INVALID, -1, 80, 255, HORIZONTAL,
+                null, null, null);
         public static final DockState LEFT = new DockState(DOCKED_LEFT,
-                DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT, DOCK_AREA_ALPHA,
+                DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT, DOCK_AREA_ALPHA, 0, VERTICAL,
                 new RectF(0, 0, 0.125f, 1), new RectF(0, 0, 0.125f, 1),
                 new RectF(0, 0, 0.5f, 1));
         public static final DockState TOP = new DockState(DOCKED_TOP,
-                DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT, DOCK_AREA_ALPHA,
+                DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT, DOCK_AREA_ALPHA, 0, HORIZONTAL,
                 new RectF(0, 0, 1, 0.125f), new RectF(0, 0, 1, 0.125f),
                 new RectF(0, 0, 1, 0.5f));
         public static final DockState RIGHT = new DockState(DOCKED_RIGHT,
-                DOCKED_STACK_CREATE_MODE_BOTTOM_OR_RIGHT, DOCK_AREA_ALPHA,
+                DOCKED_STACK_CREATE_MODE_BOTTOM_OR_RIGHT, DOCK_AREA_ALPHA, 0, VERTICAL,
                 new RectF(0.875f, 0, 1, 1), new RectF(0.875f, 0, 1, 1),
                 new RectF(0.5f, 0, 1, 1));
         public static final DockState BOTTOM = new DockState(DOCKED_BOTTOM,
-                DOCKED_STACK_CREATE_MODE_BOTTOM_OR_RIGHT, DOCK_AREA_ALPHA,
+                DOCKED_STACK_CREATE_MODE_BOTTOM_OR_RIGHT, DOCK_AREA_ALPHA, 0, HORIZONTAL,
                 new RectF(0, 0.875f, 1, 1), new RectF(0, 0.875f, 1, 1),
                 new RectF(0, 0.5f, 1, 1));
 
@@ -267,33 +281,109 @@
         }
 
         // Represents the view state of this dock state
-        public class ViewState {
+        public static class ViewState {
+            private static final IntProperty<ViewState> HINT_ALPHA =
+                    new IntProperty<ViewState>("drawableAlpha") {
+                        @Override
+                        public void setValue(ViewState object, int alpha) {
+                            object.mHintTextAlpha = alpha;
+                            object.dockAreaOverlay.invalidateSelf();
+                        }
+
+                        @Override
+                        public Integer get(ViewState object) {
+                            return object.mHintTextAlpha;
+                        }
+                    };
+
             public final int dockAreaAlpha;
             public final ColorDrawable dockAreaOverlay;
-            private AnimatorSet dockAreaOverlayAnimator;
+            public final int hintTextAlpha;
+            public final int hintTextOrientation;
 
-            private ViewState(int alpha) {
-                dockAreaAlpha = alpha;
+            private final int mHintTextResId;
+            private String mHintText;
+            private Paint mHintTextPaint;
+            private Point mHintTextBounds = new Point();
+            private int mHintTextAlpha = 255;
+            private AnimatorSet mDockAreaOverlayAnimator;
+            private Rect mTmpRect = new Rect();
+
+            private ViewState(int areaAlpha, int hintAlpha, @TextOrientation int hintOrientation,
+                    int hintTextResId) {
+                dockAreaAlpha = areaAlpha;
                 dockAreaOverlay = new ColorDrawable(0xFFffffff);
                 dockAreaOverlay.setAlpha(0);
+                hintTextAlpha = hintAlpha;
+                hintTextOrientation = hintOrientation;
+                mHintTextResId = hintTextResId;
+                mHintTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+                mHintTextPaint.setColor(Color.WHITE);
+            }
+
+            /**
+             * Updates the view state with the given context.
+             */
+            public void update(Context context) {
+                Resources res = context.getResources();
+                mHintText = context.getString(mHintTextResId);
+                mHintTextPaint.setTextSize(res.getDimensionPixelSize(
+                        R.dimen.recents_drag_hint_text_size));
+                mHintTextPaint.getTextBounds(mHintText, 0, mHintText.length(), mTmpRect);
+                mHintTextBounds.set((int) mHintTextPaint.measureText(mHintText), mTmpRect.height());
+            }
+
+            /**
+             * Draws the current view state.
+             */
+            public void draw(Canvas canvas) {
+                // Draw the overlay background
+                if (dockAreaOverlay.getAlpha() > 0) {
+                    dockAreaOverlay.draw(canvas);
+                }
+
+                // Draw the hint text
+                if (mHintTextAlpha > 0) {
+                    Rect bounds = dockAreaOverlay.getBounds();
+                    int x = bounds.left + (bounds.width() - mHintTextBounds.x) / 2;
+                    int y = bounds.top + (bounds.height() + mHintTextBounds.y) / 2;
+                    mHintTextPaint.setAlpha(mHintTextAlpha);
+                    if (hintTextOrientation == VERTICAL) {
+                        canvas.save();
+                        canvas.rotate(-90f, bounds.centerX(), bounds.centerY());
+                    }
+                    canvas.drawText(mHintText, x, y, mHintTextPaint);
+                    if (hintTextOrientation == VERTICAL) {
+                        canvas.restore();
+                    }
+                }
             }
 
             /**
              * Creates a new bounds and alpha animation.
              */
-            public void startAnimation(Rect bounds, int alpha, int duration,
+            public void startAnimation(Rect bounds, int areaAlpha, int hintAlpha, int duration,
                     Interpolator interpolator, boolean animateAlpha, boolean animateBounds) {
-                if (dockAreaOverlayAnimator != null) {
-                    dockAreaOverlayAnimator.cancel();
+                if (mDockAreaOverlayAnimator != null) {
+                    mDockAreaOverlayAnimator.cancel();
                 }
 
                 ArrayList<Animator> animators = new ArrayList<>();
-                if (dockAreaOverlay.getAlpha() != alpha) {
+                if (dockAreaOverlay.getAlpha() != areaAlpha) {
                     if (animateAlpha) {
                         animators.add(ObjectAnimator.ofInt(dockAreaOverlay,
-                                Utilities.DRAWABLE_ALPHA, dockAreaOverlay.getAlpha(), alpha));
+                                Utilities.DRAWABLE_ALPHA, dockAreaOverlay.getAlpha(), areaAlpha));
                     } else {
-                        dockAreaOverlay.setAlpha(alpha);
+                        dockAreaOverlay.setAlpha(areaAlpha);
+                    }
+                }
+                if (mHintTextAlpha != hintAlpha) {
+                    if (animateAlpha) {
+                        animators.add(ObjectAnimator.ofInt(this, HINT_ALPHA, mHintTextAlpha,
+                                hintAlpha));
+                    } else {
+                        mHintTextAlpha = hintAlpha;
+                        dockAreaOverlay.invalidateSelf();
                     }
                 }
                 if (bounds != null && !dockAreaOverlay.getBounds().equals(bounds)) {
@@ -307,11 +397,11 @@
                     }
                 }
                 if (!animators.isEmpty()) {
-                    dockAreaOverlayAnimator = new AnimatorSet();
-                    dockAreaOverlayAnimator.playTogether(animators);
-                    dockAreaOverlayAnimator.setDuration(duration);
-                    dockAreaOverlayAnimator.setInterpolator(interpolator);
-                    dockAreaOverlayAnimator.start();
+                    mDockAreaOverlayAnimator = new AnimatorSet();
+                    mDockAreaOverlayAnimator.playTogether(animators);
+                    mDockAreaOverlayAnimator.setDuration(duration);
+                    mDockAreaOverlayAnimator.setInterpolator(interpolator);
+                    mDockAreaOverlayAnimator.start();
                 }
             }
         }
@@ -331,17 +421,26 @@
          *                              the initial touch area.  This is also the new dock area to
          *                              draw.
          */
-        DockState(int dockSide, int createMode, int dockAreaAlpha, RectF touchArea, RectF dockArea,
+        DockState(int dockSide, int createMode, int dockAreaAlpha, int hintTextAlpha,
+                  @TextOrientation int hintTextOrientation, RectF touchArea, RectF dockArea,
                   RectF expandedTouchDockArea) {
             this.dockSide = dockSide;
             this.createMode = createMode;
-            this.viewState = new ViewState(dockAreaAlpha);
+            this.viewState = new ViewState(dockAreaAlpha, hintTextAlpha, hintTextOrientation,
+                    R.string.recents_drag_hint_message);
             this.dockArea = dockArea;
             this.touchArea = touchArea;
             this.expandedTouchDockArea = expandedTouchDockArea;
         }
 
         /**
+         * Updates the dock state with the given context.
+         */
+        public void update(Context context) {
+            viewState.update(context);
+        }
+
+        /**
          * Returns whether {@param x} and {@param y} are contained in the area scaled to the
          * given {@param width} and {@param height}.
          */
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/RecentsTransitionHelper.java b/packages/SystemUI/src/com/android/systemui/recents/views/RecentsTransitionHelper.java
index db5413f..04f10ef8 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/RecentsTransitionHelper.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/RecentsTransitionHelper.java
@@ -286,10 +286,9 @@
         // Calculate the offscreen task rect (for tasks that are not backed by views)
         float stackScroll = stackView.getScroller().getStackScroll();
         TaskView taskView = stackView.getChildViewForTask(task);
-        TaskStackLayoutAlgorithm layoutAlgorithm = stackView.getStackAlgorithm();
-        Rect offscreenTaskRect = new Rect(layoutAlgorithm.mTaskRect);
-        offscreenTaskRect.offsetTo(offscreenTaskRect.left,
-                layoutAlgorithm.mStackRect.bottom);
+        TaskStackLayoutAlgorithm stackLayout = stackView.getStackAlgorithm();
+        Rect offscreenTaskRect = new Rect();
+        stackLayout.getFrontOfStackTransform().rect.round(offscreenTaskRect);
 
         // If this is a full screen stack, the transition will be towards the single, full screen
         // task. We only need the transition spec for this task.
@@ -302,8 +301,8 @@
             if (taskView == null) {
                 specs.add(composeOffscreenAnimationSpec(task, offscreenTaskRect));
             } else {
-                layoutAlgorithm.getStackTransformScreenCoordinates(task, stackScroll, mTmpTransform,
-                        null);
+                mTmpTransform.fillIn(taskView);
+                stackLayout.transformToScreenCoordinates(mTmpTransform);
                 specs.add(composeAnimationSpec(stackView, taskView, mTmpTransform,
                         true /* addHeaderBitmap */));
             }
@@ -324,8 +323,8 @@
                     //       never happen)
                     specs.add(composeOffscreenAnimationSpec(t, offscreenTaskRect));
                 } else {
-                    layoutAlgorithm.getStackTransformScreenCoordinates(t, stackScroll,
-                            mTmpTransform, null);
+                    mTmpTransform.fillIn(taskView);
+                    stackLayout.transformToScreenCoordinates(mTmpTransform);
                     specs.add(composeAnimationSpec(stackView, tv, mTmpTransform,
                             true /* addHeaderBitmap */));
                 }
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java b/packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java
index d55c7d8..6ecd52d 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java
@@ -57,6 +57,7 @@
 import com.android.systemui.recents.events.activity.EnterRecentsWindowAnimationCompletedEvent;
 import com.android.systemui.recents.events.activity.HideStackActionButtonEvent;
 import com.android.systemui.recents.events.activity.LaunchTaskEvent;
+import com.android.systemui.recents.events.activity.MultiWindowStateChangedEvent;
 import com.android.systemui.recents.events.activity.ShowStackActionButtonEvent;
 import com.android.systemui.recents.events.ui.AllTaskViewsDismissedEvent;
 import com.android.systemui.recents.events.ui.DismissAllTaskViewsEvent;
@@ -91,7 +92,7 @@
     private static final int DEFAULT_UPDATE_SCRIM_DURATION = 200;
     private static final float DEFAULT_SCRIM_ALPHA = 0.33f;
 
-    private static final int SHOW_STACK_ACTION_BUTTON_DURATION = 150;
+    private static final int SHOW_STACK_ACTION_BUTTON_DURATION = 134;
     private static final int HIDE_STACK_ACTION_BUTTON_DURATION = 100;
 
     private TaskStack mStack;
@@ -143,7 +144,6 @@
                     R.dimen.recents_task_view_rounded_corners_radius);
             mStackActionButton = (TextView) inflater.inflate(R.layout.recents_stack_action_button,
                     this, false);
-            mStackActionButton.forceHasOverlappingRendering(false);
             mStackActionButton.setOnClickListener(new View.OnClickListener() {
                 @Override
                 public void onClick(View v) {
@@ -203,9 +203,11 @@
     /**
      * Called from RecentsActivity when the task stack is updated.
      */
-    public void updateStack(TaskStack stack) {
+    public void updateStack(TaskStack stack, boolean setStackViewTasks) {
         mStack = stack;
-        mTaskStackView.setTasks(stack, true /* allowNotifyStackChanges */);
+        if (setStackViewTasks) {
+            mTaskStackView.setTasks(stack, true /* allowNotifyStackChanges */);
+        }
 
         // Update the top level view's visibilities
         if (stack.getTaskCount() > 0) {
@@ -424,10 +426,7 @@
 
         ArrayList<TaskStack.DockState> visDockStates = mTouchHandler.getVisibleDockStates();
         for (int i = visDockStates.size() - 1; i >= 0; i--) {
-            Drawable d = visDockStates.get(i).viewState.dockAreaOverlay;
-            if (d.getAlpha() > 0) {
-                d.draw(canvas);
-            }
+            visDockStates.get(i).viewState.draw(canvas);
         }
     }
 
@@ -463,18 +462,29 @@
     public final void onBusEvent(DragStartEvent event) {
         updateVisibleDockRegions(mTouchHandler.getDockStatesForCurrentOrientation(),
                 true /* isDefaultDockState */, TaskStack.DockState.NONE.viewState.dockAreaAlpha,
+                TaskStack.DockState.NONE.viewState.hintTextAlpha,
                 true /* animateAlpha */, false /* animateBounds */);
+
+        // Temporarily hide the stack action button without changing visibility
+        if (mStackActionButton != null) {
+            mStackActionButton.animate()
+                    .alpha(0f)
+                    .setDuration(HIDE_STACK_ACTION_BUTTON_DURATION)
+                    .setInterpolator(Interpolators.ALPHA_OUT)
+                    .start();
+        }
     }
 
     public final void onBusEvent(DragDropTargetChangedEvent event) {
         if (event.dropTarget == null || !(event.dropTarget instanceof TaskStack.DockState)) {
             updateVisibleDockRegions(mTouchHandler.getDockStatesForCurrentOrientation(),
                     true /* isDefaultDockState */, TaskStack.DockState.NONE.viewState.dockAreaAlpha,
+                    TaskStack.DockState.NONE.viewState.hintTextAlpha,
                     true /* animateAlpha */, true /* animateBounds */);
         } else {
             final TaskStack.DockState dockState = (TaskStack.DockState) event.dropTarget;
             updateVisibleDockRegions(new TaskStack.DockState[] {dockState},
-                    false /* isDefaultDockState */, -1, true /* animateAlpha */,
+                    false /* isDefaultDockState */, -1, -1, true /* animateAlpha */,
                     true /* animateBounds */);
         }
         if (mStackActionButton != null) {
@@ -496,13 +506,9 @@
             final TaskStack.DockState dockState = (TaskStack.DockState) event.dropTarget;
 
             // Hide the dock region
-            updateVisibleDockRegions(null, false /* isDefaultDockState */, -1,
+            updateVisibleDockRegions(null, false /* isDefaultDockState */, -1, -1,
                     false /* animateAlpha */, false /* animateBounds */);
 
-            TaskStackLayoutAlgorithm stackLayout = mTaskStackView.getStackAlgorithm();
-            TaskStackViewScroller stackScroller = mTaskStackView.getScroller();
-            TaskViewTransform tmpTransform = new TaskViewTransform();
-
             // We translated the view but we need to animate it back from the current layout-space
             // rect to its final layout-space rect
             int x = (int) event.taskView.getTranslationX();
@@ -546,9 +552,18 @@
                     event.task.getTopComponent().flattenToShortString());
         } else {
             // Animate the overlay alpha back to 0
-            updateVisibleDockRegions(null, true /* isDefaultDockState */, -1,
+            updateVisibleDockRegions(null, true /* isDefaultDockState */, -1, -1,
                     true /* animateAlpha */, false /* animateBounds */);
         }
+
+        // Show the stack action button again without changing visibility
+        if (mStackActionButton != null) {
+            mStackActionButton.animate()
+                    .alpha(1f)
+                    .setDuration(SHOW_STACK_ACTION_BUTTON_DURATION)
+                    .setInterpolator(Interpolators.ALPHA_IN)
+                    .start();
+        }
     }
 
     private Rect getTaskRect(TaskView taskView) {
@@ -622,6 +637,10 @@
         hideStackActionButton(HIDE_STACK_ACTION_BUTTON_DURATION, true /* translate */);
     }
 
+    public final void onBusEvent(MultiWindowStateChangedEvent event) {
+        updateStack(event.stack, false /* setStackViewTasks */);
+    }
+
     /**
      * Shows the stack action button.
      */
@@ -704,8 +723,8 @@
      * Updates the dock region to match the specified dock state.
      */
     private void updateVisibleDockRegions(TaskStack.DockState[] newDockStates,
-            boolean isDefaultDockState, int overrideAlpha, boolean animateAlpha,
-            boolean animateBounds) {
+            boolean isDefaultDockState, int overrideAreaAlpha, int overrideHintAlpha,
+            boolean animateAlpha, boolean animateBounds) {
         ArraySet<TaskStack.DockState> newDockStatesSet = Utilities.arrayToSet(newDockStates,
                 new ArraySet<TaskStack.DockState>());
         ArrayList<TaskStack.DockState> visDockStates = mTouchHandler.getVisibleDockStates();
@@ -714,11 +733,16 @@
             TaskStack.DockState.ViewState viewState = dockState.viewState;
             if (newDockStates == null || !newDockStatesSet.contains(dockState)) {
                 // This is no longer visible, so hide it
-                viewState.startAnimation(null, 0, DOCK_AREA_OVERLAY_TRANSITION_DURATION,
+                viewState.startAnimation(null, 0, 0, DOCK_AREA_OVERLAY_TRANSITION_DURATION,
                         Interpolators.ALPHA_OUT, animateAlpha, animateBounds);
             } else {
                 // This state is now visible, update the bounds and show it
-                int alpha = (overrideAlpha != -1 ? overrideAlpha : viewState.dockAreaAlpha);
+                int areaAlpha = overrideAreaAlpha != -1
+                        ? overrideAreaAlpha
+                        : viewState.dockAreaAlpha;
+                int hintAlpha = overrideHintAlpha != -1
+                        ? overrideHintAlpha
+                        : viewState.hintTextAlpha;
                 Rect bounds = isDefaultDockState
                         ? dockState.getPreDockedBounds(getMeasuredWidth(), getMeasuredHeight())
                         : dockState.getDockedBounds(getMeasuredWidth(), getMeasuredHeight(),
@@ -727,8 +751,9 @@
                     viewState.dockAreaOverlay.setCallback(this);
                     viewState.dockAreaOverlay.setBounds(bounds);
                 }
-                viewState.startAnimation(bounds, alpha, DOCK_AREA_OVERLAY_TRANSITION_DURATION,
-                        Interpolators.ALPHA_IN, animateAlpha, animateBounds);
+                viewState.startAnimation(bounds, areaAlpha, hintAlpha,
+                        DOCK_AREA_OVERLAY_TRANSITION_DURATION, Interpolators.ALPHA_IN,
+                        animateAlpha, animateBounds);
             }
         }
     }
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/RecentsViewTouchHandler.java b/packages/SystemUI/src/com/android/systemui/recents/views/RecentsViewTouchHandler.java
index 70c4dbd..6115aa8 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/RecentsViewTouchHandler.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/RecentsViewTouchHandler.java
@@ -171,6 +171,7 @@
                 TaskStack.DockState[] dockStates = getDockStatesForCurrentOrientation();
                 for (TaskStack.DockState dockState : dockStates) {
                     registerDropTargetForCurrentDrag(dockState);
+                    dockState.update(mRv.getContext());
                     mVisibleDockStates.add(dockState);
                 }
             }
@@ -192,7 +193,9 @@
     }
 
     public final void onBusEvent(ConfigurationChangedEvent event) {
-        updateSnapAlgorithm();
+        if (event.fromDisplayDensityChange) {
+            updateSnapAlgorithm();
+        }
     }
 
     /**
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/SystemBarScrimViews.java b/packages/SystemUI/src/com/android/systemui/recents/views/SystemBarScrimViews.java
index dce2353..2f3019c 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/SystemBarScrimViews.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/SystemBarScrimViews.java
@@ -41,7 +41,8 @@
 
     private boolean mHasNavBarScrim;
     private boolean mShouldAnimateNavBarScrim;
-
+    private boolean mHasTransposedNavBar;
+    private boolean mHasDockedTasks;
     private int mNavBarScrimEnterDuration;
 
     public SystemBarScrimViews(RecentsActivity activity) {
@@ -50,6 +51,8 @@
         mNavBarScrimView.forceHasOverlappingRendering(false);
         mNavBarScrimEnterDuration = activity.getResources().getInteger(
                 R.integer.recents_nav_bar_scrim_enter_duration);
+        mHasNavBarScrim = Recents.getSystemServices().hasTransposedNavBar();
+        mHasDockedTasks = Recents.getSystemServices().hasDockedTask();
     }
 
     /**
@@ -101,8 +104,7 @@
      * @return Whether to show the nav bar scrim.
      */
     private boolean isNavBarScrimRequired(boolean hasStackTasks) {
-        SystemServicesProxy ssp = Recents.getSystemServices();
-        return hasStackTasks && !ssp.hasTransposedNavBar() && !ssp.hasDockedTask();
+        return hasStackTasks && !mHasTransposedNavBar && !mHasDockedTasks;
     }
 
     /**** EventBus events ****/
@@ -142,11 +144,15 @@
     }
 
     public final void onBusEvent(ConfigurationChangedEvent event) {
+        if (event.fromDeviceOrientationChange) {
+            mHasNavBarScrim = Recents.getSystemServices().hasTransposedNavBar();
+        }
         animateScrimToCurrentNavBarState(event.hasStackTasks);
     }
 
     public final void onBusEvent(MultiWindowStateChangedEvent event) {
-        animateScrimToCurrentNavBarState(event.hasStackTasks);
+        mHasDockedTasks = event.inMultiWindow;
+        animateScrimToCurrentNavBarState(event.stack.getStackTaskCount() > 0);
     }
 
     /**
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackAnimationHelper.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackAnimationHelper.java
index 665d9ad..e79306f 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackAnimationHelper.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackAnimationHelper.java
@@ -485,7 +485,7 @@
 
         // Get the final set of task transforms
         mStackView.getLayoutTaskTransforms(newScroll, stackLayout.getFocusState(), stackTasks,
-                mTmpFinalTaskTransforms);
+                true /* ignoreTaskOverrides */, mTmpFinalTaskTransforms);
 
         // Focus the task view
         TaskView newFocusedTaskView = mStackView.getChildViewForTask(newFocusedTask);
@@ -529,7 +529,7 @@
             int duration;
             Interpolator interpolator;
             if (willScrollToFront) {
-                duration = Math.max(100, 100 + ((i - 1) * 50));
+                duration = calculateStaggeredAnimDuration(i);
                 interpolator = FOCUS_BEHIND_NEXT_TASK_INTERPOLATOR;
             } else {
                 if (i < newFocusTaskViewIndex) {
@@ -553,4 +553,100 @@
         }
         return willScroll;
     }
+
+    /**
+     * Starts the animation to go to the initial stack layout with a task focused.  In addition, the
+     * previous task will be animated in after the scroll completes.
+     */
+    public void startNewStackScrollAnimation(TaskStack newStack,
+            ReferenceCountedTrigger animationTrigger) {
+        TaskStackLayoutAlgorithm stackLayout = mStackView.getStackAlgorithm();
+        TaskStackViewScroller stackScroller = mStackView.getScroller();
+
+        // Get the current set of task transforms
+        ArrayList<Task> stackTasks = newStack.getStackTasks();
+        mStackView.getCurrentTaskTransforms(stackTasks, mTmpCurrentTaskTransforms);
+
+        // Update the stack
+        mStackView.setTasks(newStack, false /* allowNotifyStackChanges */);
+        mStackView.updateLayoutAlgorithm(false /* boundScroll */);
+
+        // Pick up the newly visible views after the scroll
+        final float newScroll = stackLayout.mInitialScrollP;
+        mStackView.bindVisibleTaskViews(newScroll);
+
+        // Update the internal state
+        stackLayout.setFocusState(TaskStackLayoutAlgorithm.STATE_UNFOCUSED);
+        stackLayout.setTaskOverridesForInitialState(newStack, true /* ignoreScrollToFront */);
+        stackScroller.setStackScroll(newScroll);
+        mStackView.cancelDeferredTaskViewLayoutAnimation();
+
+        // Get the final set of task transforms
+        mStackView.getLayoutTaskTransforms(newScroll, stackLayout.getFocusState(), stackTasks,
+                false /* ignoreTaskOverrides */, mTmpFinalTaskTransforms);
+
+        // Hide the front most task view until the scroll is complete
+        Task frontMostTask = newStack.getStackFrontMostTask(false /* includeFreeform */);
+        final TaskView frontMostTaskView = mStackView.getChildViewForTask(frontMostTask);
+        final TaskViewTransform frontMostTransform = mTmpFinalTaskTransforms.get(
+                stackTasks.indexOf(frontMostTask));
+        if (frontMostTaskView != null) {
+            mStackView.updateTaskViewToTransform(frontMostTaskView,
+                    stackLayout.getFrontOfStackTransform(), AnimationProps.IMMEDIATE);
+        }
+
+        // Setup the end listener to return all the hidden views to the view pool after the
+        // focus animation
+        animationTrigger.addLastDecrementRunnable(new Runnable() {
+            @Override
+            public void run() {
+                mStackView.bindVisibleTaskViews(newScroll);
+
+                // Now, animate in the front-most task
+                if (frontMostTaskView != null) {
+                    mStackView.updateTaskViewToTransform(frontMostTaskView, frontMostTransform,
+                            new AnimationProps(75, 200, FOCUS_BEHIND_NEXT_TASK_INTERPOLATOR));
+                }
+            }
+        });
+
+        List<TaskView> taskViews = mStackView.getTaskViews();
+        int taskViewCount = taskViews.size();
+        for (int i = 0; i < taskViewCount; i++) {
+            TaskView tv = taskViews.get(i);
+            Task task = tv.getTask();
+
+            if (mStackView.isIgnoredTask(task)) {
+                continue;
+            }
+            if (task == frontMostTask && frontMostTaskView != null) {
+                continue;
+            }
+
+            int taskIndex = stackTasks.indexOf(task);
+            TaskViewTransform fromTransform = mTmpCurrentTaskTransforms.get(taskIndex);
+            TaskViewTransform toTransform = mTmpFinalTaskTransforms.get(taskIndex);
+
+            // Update the task to the initial state (for the newly picked up tasks)
+            mStackView.updateTaskViewToTransform(tv, fromTransform, AnimationProps.IMMEDIATE);
+
+            int duration = calculateStaggeredAnimDuration(i);
+            Interpolator interpolator = FOCUS_BEHIND_NEXT_TASK_INTERPOLATOR;
+
+            AnimationProps anim = new AnimationProps()
+                    .setDuration(AnimationProps.BOUNDS, duration)
+                    .setInterpolator(AnimationProps.BOUNDS, interpolator)
+                    .setListener(animationTrigger.decrementOnAnimationEnd());
+            animationTrigger.increment();
+            mStackView.updateTaskViewToTransform(tv, toTransform, anim);
+        }
+    }
+
+    /**
+     * Caclulates a staggered duration for {@link #startScrollToFocusedTaskAnimation} and
+     * {@link #startNewStackScrollAnimation}.
+     */
+    private int calculateStaggeredAnimDuration(int i) {
+        return Math.max(100, 100 + ((i - 1) * 50));
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackLayoutAlgorithm.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackLayoutAlgorithm.java
index 34d6bce..774e4e9 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackLayoutAlgorithm.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackLayoutAlgorithm.java
@@ -345,11 +345,11 @@
         mCb = cb;
         mFreeformLayoutAlgorithm = new FreeformWorkspaceLayoutAlgorithm(context);
         mMinMargin = res.getDimensionPixelSize(R.dimen.recents_layout_min_margin);
-        mBaseTopMargin = getDimensionForDevice(res,
+        mBaseTopMargin = getDimensionForDevice(context,
                 R.dimen.recents_layout_top_margin_phone,
                 R.dimen.recents_layout_top_margin_tablet,
                 R.dimen.recents_layout_top_margin_tablet_xlarge);
-        mBaseSideMargin = getDimensionForDevice(res,
+        mBaseSideMargin = getDimensionForDevice(context,
                 R.dimen.recents_layout_side_margin_phone,
                 R.dimen.recents_layout_side_margin_tablet,
                 R.dimen.recents_layout_side_margin_tablet_xlarge);
@@ -375,14 +375,14 @@
                 res.getDimensionPixelSize(R.dimen.recents_layout_bottom_peek_size);
         mMinTranslationZ = res.getDimensionPixelSize(R.dimen.recents_layout_z_min);
         mMaxTranslationZ = res.getDimensionPixelSize(R.dimen.recents_layout_z_max);
-        mBaseInitialTopOffset = getDimensionForDevice(res,
+        mBaseInitialTopOffset = getDimensionForDevice(context,
                 R.dimen.recents_layout_initial_top_offset_phone_port,
                 R.dimen.recents_layout_initial_top_offset_phone_land,
                 R.dimen.recents_layout_initial_top_offset_tablet,
                 R.dimen.recents_layout_initial_top_offset_tablet,
                 R.dimen.recents_layout_initial_top_offset_tablet,
                 R.dimen.recents_layout_initial_top_offset_tablet);
-        mBaseInitialBottomOffset = getDimensionForDevice(res,
+        mBaseInitialBottomOffset = getDimensionForDevice(context,
                 R.dimen.recents_layout_initial_bottom_offset_phone_port,
                 R.dimen.recents_layout_initial_bottom_offset_phone_land,
                 R.dimen.recents_layout_initial_bottom_offset_tablet,
@@ -454,11 +454,8 @@
         mStackActionButtonRect.set(mStackRect.left, mStackRect.top - topMargin,
                 mStackRect.right, mStackRect.top + mFocusedTopPeekHeight);
 
-        // Anchor the task rect top aligned to the non-freeform stack rect
-        float aspect = (float) (windowRect.width() - (mSystemInsets.left + mSystemInsets.right)) /
-                (windowRect.height() - (mSystemInsets.top + mSystemInsets.bottom));
-        int minHeight = mStackRect.height() - mInitialTopOffset - mStackBottomOffset;
-        int height = (int) Math.min(mStackRect.width() / aspect, minHeight);
+        // Anchor the task rect top aligned to the stack rect
+        int height = mStackRect.height() - mInitialTopOffset - mStackBottomOffset;
         mTaskRect.set(mStackRect.left, mStackRect.top, mStackRect.right, mStackRect.top + height);
 
         // Short circuit here if the stack rects haven't changed so we don't do all the work below
@@ -577,7 +574,7 @@
     /**
      * Creates task overrides to ensure the initial stack layout if necessary.
      */
-    public void setTaskOverridesForInitialState(TaskStack stack) {
+    public void setTaskOverridesForInitialState(TaskStack stack, boolean ignoreScrollToFront) {
         RecentsActivityLaunchState launchState = Recents.getConfiguration().getLaunchState();
 
         mTaskIndexOverrideMap.clear();
@@ -585,7 +582,7 @@
         boolean scrollToFront = launchState.launchedFromHome ||
                 launchState.launchedViaDockGesture;
         if (getInitialFocusState() == STATE_UNFOCUSED && mNumStackTasks > 1) {
-            if (!launchState.launchedWithAltTab && !scrollToFront) {
+            if (ignoreScrollToFront || (!launchState.launchedWithAltTab && !scrollToFront)) {
                 // Set the initial scroll to the predefined state (which differs from the stack)
                 float [] initialNormX = new float[] {
                         getNormalizedXFromUnfocusedY(mSystemInsets.bottom + mInitialBottomOffset,
@@ -834,12 +831,19 @@
      */
     public TaskViewTransform getStackTransformScreenCoordinates(Task task, float stackScroll,
             TaskViewTransform transformOut, TaskViewTransform frontTransform) {
-        Rect windowRect = Recents.getSystemServices().getWindowRect();
         TaskViewTransform transform = getStackTransform(task, stackScroll, mFocusState,
                 transformOut, frontTransform, true /* forceUpdate */,
                 false /* ignoreTaskOverrides */);
-        transform.rect.offset(windowRect.left, windowRect.top);
-        return transform;
+        return transformToScreenCoordinates(transform);
+    }
+
+    /**
+     * Transforms the given {@param transformOut} to the screen coordinates.
+     */
+    public TaskViewTransform transformToScreenCoordinates(TaskViewTransform transformOut) {
+        Rect windowRect = Recents.getSystemServices().getWindowRect();
+        transformOut.rect.offset(windowRect.left, windowRect.top);
+        return transformOut;
     }
 
     /**
@@ -938,7 +942,11 @@
      * stack.
      */
     float getStackScrollForTask(Task t) {
-        return mTaskIndexOverrideMap.get(t.key.id, (float) mTaskIndexMap.get(t.key.id, 0));
+        Float overrideP = mTaskIndexOverrideMap.get(t.key.id, null);
+        if (overrideP == null) {
+            return (float) mTaskIndexMap.get(t.key.id, 0);
+        }
+        return overrideP;
     }
 
     /**
@@ -997,7 +1005,8 @@
         int sideMargin = getScaleForExtent(windowRect, displayRect, mBaseSideMargin, mMinMargin,
                 WIDTH);
         int targetStackWidth = taskStackBounds.width() - 2 * sideMargin;
-        if (ssp.getDisplayOrientation() == Configuration.ORIENTATION_LANDSCAPE) {
+        if (Utilities.getAppConfiguration(mContext).orientation
+                == Configuration.ORIENTATION_LANDSCAPE) {
             // If we are in landscape, calculate the width of the stack in portrait and ensure that
             // we are not larger than that size
             Rect portraitDisplayRect = new Rect(0, 0,
@@ -1014,20 +1023,21 @@
     /**
      * Retrieves resources that are constant regardless of the current configuration of the device.
      */
-    public static int getDimensionForDevice(Resources res, int phoneResId,
+    public static int getDimensionForDevice(Context ctx, int phoneResId,
             int tabletResId, int xlargeTabletResId) {
-        return getDimensionForDevice(res, phoneResId, phoneResId, tabletResId, tabletResId,
+        return getDimensionForDevice(ctx, phoneResId, phoneResId, tabletResId, tabletResId,
                 xlargeTabletResId, xlargeTabletResId);
     }
 
     /**
      * Retrieves resources that are constant regardless of the current configuration of the device.
      */
-    public static int getDimensionForDevice(Resources res, int phonePortResId, int phoneLandResId,
+    public static int getDimensionForDevice(Context ctx, int phonePortResId, int phoneLandResId,
             int tabletPortResId, int tabletLandResId, int xlargeTabletPortResId,
             int xlargeTabletLandResId) {
         RecentsConfiguration config = Recents.getConfiguration();
-        boolean isLandscape = Recents.getSystemServices().getDisplayOrientation() ==
+        Resources res = ctx.getResources();
+        boolean isLandscape = Utilities.getAppConfiguration(ctx).orientation ==
                 Configuration.ORIENTATION_LANDSCAPE;
         if (config.isXLargeScreen) {
             return res.getDimensionPixelSize(isLandscape
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java
index a75d1e1..6176d99 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java
@@ -328,6 +328,7 @@
      */
     public void setTasks(TaskStack stack, boolean allowNotifyStackChanges) {
         boolean isInitialized = mLayoutAlgorithm.isInitialized();
+
         // Only notify if we are already initialized, otherwise, everything will pick up all the
         // new and old tasks when we next layout
         mStack.setTasks(getContext(), stack.computeAllTasksList(),
@@ -344,7 +345,7 @@
      */
     public void updateToInitialState() {
         mStackScroller.setStackScrollToInitialState();
-        mLayoutAlgorithm.setTaskOverridesForInitialState(mStack);
+        mLayoutAlgorithm.setTaskOverridesForInitialState(mStack, false /* ignoreScrollToFront */);
     }
 
     /** Updates the list of task views */
@@ -508,11 +509,7 @@
      * Binds the visible {@link TaskView}s at the given target scroll.
      */
     void bindVisibleTaskViews(float targetStackScroll) {
-        bindVisibleTaskViews(targetStackScroll, mIgnoreTasks, false /* ignoreTaskOverrides */);
-    }
-
-    void bindVisibleTaskViews(float targetStackScroll, boolean ignoreTaskOverrides) {
-        bindVisibleTaskViews(targetStackScroll, mIgnoreTasks, ignoreTaskOverrides);
+        bindVisibleTaskViews(targetStackScroll, false /* ignoreTaskOverrides */);
     }
 
     /**
@@ -525,17 +522,14 @@
      * @param targetStackScroll If provided, will ensure that the set of visible {@link TaskView}s
      *                          includes those visible at the current stack scroll, and all at the
      *                          target stack scroll.
-     * @param ignoreTasksSet The set of tasks to ignore in this rebinding of the visible
-     *                       {@link TaskView}s
      * @param ignoreTaskOverrides If set, the visible task computation will get the transforms for
      *                            tasks at their non-overridden task progress
      */
-    void bindVisibleTaskViews(float targetStackScroll, ArraySet<Task.TaskKey> ignoreTasksSet,
-            boolean ignoreTaskOverrides) {
+    void bindVisibleTaskViews(float targetStackScroll, boolean ignoreTaskOverrides) {
         // Get all the task transforms
         ArrayList<Task> tasks = mStack.getStackTasks();
         int[] visibleTaskRange = computeVisibleTaskTransforms(mCurrentTaskTransforms, tasks,
-                mStackScroller.getStackScroll(), targetStackScroll, ignoreTasksSet,
+                mStackScroller.getStackScroll(), targetStackScroll, mIgnoreTasks,
                 ignoreTaskOverrides);
 
         // Return all the invisible children to the pool
@@ -548,7 +542,7 @@
             Task task = tv.getTask();
 
             // Skip ignored tasks
-            if (ignoreTasksSet.contains(task.key)) {
+            if (mIgnoreTasks.contains(task.key)) {
                 continue;
             }
 
@@ -578,7 +572,7 @@
             TaskViewTransform transform = mCurrentTaskTransforms.get(i);
 
             // Skip ignored tasks
-            if (ignoreTasksSet.contains(task.key)) {
+            if (mIgnoreTasks.contains(task.key)) {
                 continue;
             }
 
@@ -626,10 +620,10 @@
     }
 
     /**
-     * @see #relayoutTaskViews(AnimationProps, ArraySet<Task.TaskKey>, boolean)
+     * @see #relayoutTaskViews(AnimationProps, boolean)
      */
     public void relayoutTaskViews(AnimationProps animation) {
-        relayoutTaskViews(animation, mIgnoreTasks, false /* ignoreTaskOverrides */);
+        relayoutTaskViews(animation, false /* ignoreTaskOverrides */);
     }
 
     /**
@@ -637,16 +631,13 @@
      * {@link TaskStackLayoutAlgorithm} with the given {@param animation}. This call cancels any
      * animations that are current running on those task views, and will ensure that the children
      * {@link TaskView}s will match the set of visible tasks in the stack.
-     *
-     * @param ignoreTasksSet the set of tasks to ignore in the relayout
      */
-    private void relayoutTaskViews(AnimationProps animation, ArraySet<Task.TaskKey> ignoreTasksSet,
-            boolean ignoreTaskOverrides) {
+    private void relayoutTaskViews(AnimationProps animation, boolean ignoreTaskOverrides) {
         // If we had a deferred animation, cancel that
         mDeferredTaskViewLayoutAnimation = null;
 
         // Synchronize the current set of TaskViews
-        bindVisibleTaskViews(mStackScroller.getStackScroll(), ignoreTasksSet,
+        bindVisibleTaskViews(mStackScroller.getStackScroll(),
                 ignoreTaskOverrides /* ignoreTaskOverrides */);
 
         // Animate them to their final transforms with the given animation
@@ -657,7 +648,7 @@
             int taskIndex = mStack.indexOfStackTask(tv.getTask());
             TaskViewTransform transform = mCurrentTaskTransforms.get(taskIndex);
 
-            if (ignoreTasksSet.contains(tv.getTask().key)) {
+            if (mIgnoreTasks.contains(tv.getTask().key)) {
                 continue;
             }
 
@@ -715,13 +706,13 @@
      * {@param stackScroll} and {@param focusState}.
      */
     public void getLayoutTaskTransforms(float stackScroll, int focusState, ArrayList<Task> tasks,
-            ArrayList<TaskViewTransform> transformsOut) {
+            boolean ignoreTaskOverrides, ArrayList<TaskViewTransform> transformsOut) {
         Utilities.matchTaskListSize(tasks, transformsOut);
         for (int i = tasks.size() - 1; i >= 0; i--) {
             Task task = tasks.get(i);
             TaskViewTransform transform = transformsOut.get(i);
             mLayoutAlgorithm.getStackTransform(task, stackScroll, focusState, transform, null,
-                    true /* forceUpdate */, true /* ignoreTaskOverrides */);
+                    true /* forceUpdate */, ignoreTaskOverrides);
             transform.visible = true;
         }
     }
@@ -812,22 +803,10 @@
 
     /**
      * Updates the layout algorithm min and max virtual scroll bounds.
-     *
-     * @see #updateLayoutAlgorithm(boolean, ArraySet<Task.TaskKey>)
      */
    public void updateLayoutAlgorithm(boolean boundScrollToNewMinMax) {
-        updateLayoutAlgorithm(boundScrollToNewMinMax, mIgnoreTasks);
-    }
-
-    /**
-     * Updates the min and max virtual scroll bounds.
-     *
-     * @param ignoreTasksSet the set of tasks to ignore in the relayout
-     */
-    private void updateLayoutAlgorithm(boolean boundScrollToNewMinMax,
-            ArraySet<Task.TaskKey> ignoreTasksSet) {
         // Compute the min and max scroll values
-        mLayoutAlgorithm.update(mStack, ignoreTasksSet);
+        mLayoutAlgorithm.update(mStack, mIgnoreTasks);
 
         // Update the freeform workspace background
         SystemServicesProxy ssp = Recents.getSystemServices();
@@ -1195,8 +1174,7 @@
         }
 
         // Rebind all the views, including the ignore ones
-        bindVisibleTaskViews(mStackScroller.getStackScroll(), mIgnoreTasks,
-                false /* ignoreTaskOverrides */);
+        bindVisibleTaskViews(mStackScroller.getStackScroll(), false /* ignoreTaskOverrides */);
 
         // Measure each of the TaskViews
         mTmpTaskViews.clear();
@@ -1553,7 +1531,7 @@
         tv.onTaskBound(task);
 
         // Load the task data
-        Recents.getTaskLoader().loadTaskData(task, true /* fetchAndInvalidateThumbnails */);
+        Recents.getTaskLoader().loadTaskData(task);
     }
 
     private void unbindTaskView(TaskView tv, Task task) {
@@ -1640,7 +1618,6 @@
         }
         if (launchTaskIndex != -1) {
             // Stop all animations
-            mUIDozeTrigger.stopDozing();
             cancelAllTaskViewAnimations();
 
             final Task launchTask = mStack.getStackTasks().get(launchTaskIndex);
@@ -1834,7 +1811,7 @@
             updateLayoutAlgorithm(true /* boundScroll */);
             addIgnoreTask(event.task);
         }
-        relayoutTaskViews(animation, mIgnoreTasks, ignoreTaskOverrides);
+        relayoutTaskViews(animation, ignoreTaskOverrides);
     }
 
     public final void onBusEvent(final DragEndEvent event) {
@@ -1948,26 +1925,24 @@
         }
     }
 
-    public final void onBusEvent(MultiWindowStateChangedEvent event) {
-        if (!event.inMultiWindow) {
+    public final void onBusEvent(final MultiWindowStateChangedEvent event) {
+        if (event.inMultiWindow) {
+            setTasks(event.stack, true /* allowNotifyStackChanges */);
+        } else {
+            // Reset the launch state before handling the multiwindow change
+            RecentsActivityLaunchState launchState = Recents.getConfiguration().getLaunchState();
+            launchState.reset();
+
             // Defer until the next frame to ensure that we have received all the system insets, and
             // initial layout updates
+            event.getAnimationTrigger().increment();
             post(new Runnable() {
                 @Override
                 public void run() {
                     // Scroll the stack to the front to see the undocked task
-                    mStackScroller.animateScroll(mLayoutAlgorithm.mMaxScrollP, new Runnable() {
-                        @Override
-                        public void run() {
-                            List<TaskView> taskViews = getTaskViews();
-                            int taskViewCount = taskViews.size();
-                            for (int i = 0; i < taskViewCount; i++) {
-                                TaskView tv = taskViews.get(i);
-                                tv.getHeaderView().rebindToTask(tv.getTask(),
-                                        tv.mTouchExplorationEnabled, tv.mIsDisabledInSafeMode);
-                            }
-                        }
-                    });
+                    mAnimationHelper.startNewStackScrollAnimation(event.stack,
+                            event.getAnimationTrigger());
+                    event.getAnimationTrigger().decrement();
                 }
             });
         }
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackViewTouchHandler.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackViewTouchHandler.java
index 3cdb1fb..9edf9d6 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackViewTouchHandler.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackViewTouchHandler.java
@@ -60,8 +60,7 @@
 class TaskStackViewTouchHandler implements SwipeHelper.Callback {
 
     private static final int INACTIVE_POINTER_ID = -1;
-    private static final Interpolator STACK_TRANSFORM_INTERPOLATOR =
-            new PathInterpolator(0.73f, 0.33f, 0.42f, 0.85f);
+    private static final float CHALLENGING_SWIPE_ESCAPE_VELOCITY = 800f; // dp/sec
     // The min overscroll is the amount of task progress overscroll we want / the max overscroll
     // curve value below
     private static final float MAX_OVERSCROLL = 0.7f / 0.3f;
@@ -125,7 +124,7 @@
         mSwipeHelper = new SwipeHelper(SwipeHelper.X, this, context) {
             @Override
             protected float getSize(View v) {
-                return mSv.getWidth();
+                return getScaledDismissSize();
             }
 
             @Override
@@ -138,6 +137,16 @@
                 anim.setInterpolator(Interpolators.FAST_OUT_SLOW_IN);
                 mSwipeHelperAnimations.put(v, anim);
             }
+
+            @Override
+            protected float getUnscaledEscapeVelocity() {
+                return CHALLENGING_SWIPE_ESCAPE_VELOCITY;
+            }
+
+            @Override
+            protected long getMaxEscapeAnimDuration() {
+                return 700;
+            }
         };
         mSwipeHelper.setDisableHardwareLayers(true);
     }
@@ -483,7 +492,7 @@
 
             // Get the final set of task transforms (with task removed)
             mSv.getLayoutTaskTransforms(newStackScroll, TaskStackLayoutAlgorithm.STATE_UNFOCUSED,
-                    mCurrentTasks, mFinalTaskTransforms);
+                    mCurrentTasks, true /* ignoreTaskOverrides */, mFinalTaskTransforms);
 
             // Set the target to scroll towards upon dismissal
             mTargetStackScroll = newStackScroll;
@@ -500,7 +509,7 @@
 
     @Override
     public boolean updateSwipeProgress(View v, boolean dismissable, float swipeProgress) {
-        updateTaskViewTransforms(getDismissFraction(v));
+        updateTaskViewTransforms(Interpolators.FAST_OUT_SLOW_IN.getInterpolation(swipeProgress));
         return true;
     }
 
@@ -616,13 +625,9 @@
     }
 
     /**
-     * Returns the fraction which we should interpolate the other task views based on the dismissal
-     * of this given task.
-     *
-     * TODO: We can interpolate this to adjust when the other tasks should respond to the dismissal
+     * Returns the scaled size used to calculate the dismiss fraction.
      */
-    private float getDismissFraction(View v) {
-        float fraction = Math.min(1f, Math.abs(v.getTranslationX() / mSv.getWidth()));
-        return STACK_TRANSFORM_INTERPOLATOR.getInterpolation(fraction);
+    private float getScaledDismissSize() {
+        return 1.5f * Math.max(mSv.getWidth(), mSv.getHeight());
     }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskView.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskView.java
index 37f5a9f..7ea70b5 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskView.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskView.java
@@ -24,13 +24,9 @@
 import android.animation.ValueAnimator;
 import android.app.ActivityManager;
 import android.content.Context;
-import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.graphics.Outline;
-import android.graphics.Paint;
 import android.graphics.Point;
-import android.graphics.PorterDuff;
-import android.graphics.PorterDuffColorFilter;
 import android.graphics.Rect;
 import android.util.AttributeSet;
 import android.util.FloatProperty;
@@ -607,6 +603,8 @@
         mTask = t;
         mTask.addCallback(this);
         mIsDisabledInSafeMode = !mTask.isSystemApp && ssp.isInSafeMode();
+        mThumbnailView.bindToTask(mTask, mIsDisabledInSafeMode);
+        mHeaderView.bindToTask(mTask, mTouchExplorationEnabled, mIsDisabledInSafeMode);
 
         if (!t.isDockable && ssp.hasDockedTask()) {
             if (mIncompatibleAppToastView == null) {
@@ -623,15 +621,15 @@
 
     @Override
     public void onTaskDataLoaded(Task task, ActivityManager.TaskThumbnailInfo thumbnailInfo) {
-        // Bind each of the views to the new task data
-        mThumbnailView.rebindToTask(mTask, thumbnailInfo, mIsDisabledInSafeMode);
-        mHeaderView.rebindToTask(mTask, mTouchExplorationEnabled, mIsDisabledInSafeMode);
+        // Update each of the views to the new task data
+        mThumbnailView.onTaskDataLoaded(thumbnailInfo);
+        mHeaderView.onTaskDataLoaded();
         mTaskDataLoaded = true;
     }
 
     @Override
     public void onTaskDataUnloaded() {
-        // Unbind each of the views from the task data and remove the task callback
+        // Unbind each of the views from the task and remove the task callback
         mTask.removeCallback(this);
         mThumbnailView.unbindFromTask();
         mHeaderView.unbindFromTask(mTouchExplorationEnabled);
@@ -640,7 +638,9 @@
 
     @Override
     public void onTaskStackIdChanged() {
-        mHeaderView.rebindToTask(mTask, mTouchExplorationEnabled, mIsDisabledInSafeMode);
+        // Force rebind the header, the thumbnail does not change due to stack changes
+        mHeaderView.bindToTask(mTask, mTouchExplorationEnabled, mIsDisabledInSafeMode);
+        mHeaderView.onTaskDataLoaded();
     }
 
     /**** View.OnClickListener Implementation ****/
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewHeader.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewHeader.java
index fb0fc30..e2f2198 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewHeader.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewHeader.java
@@ -284,14 +284,14 @@
         // Update the dimensions of everything in the header. We do this because we need to use
         // resources for the display, and not the current configuration.
         Resources res = getResources();
-        int headerBarHeight = TaskStackLayoutAlgorithm.getDimensionForDevice(res,
+        int headerBarHeight = TaskStackLayoutAlgorithm.getDimensionForDevice(getContext(),
                 R.dimen.recents_task_view_header_height,
                 R.dimen.recents_task_view_header_height,
                 R.dimen.recents_task_view_header_height,
                 R.dimen.recents_task_view_header_height_tablet_land,
                 R.dimen.recents_task_view_header_height,
                 R.dimen.recents_task_view_header_height_tablet_land);
-        int headerButtonPadding = TaskStackLayoutAlgorithm.getDimensionForDevice(res,
+        int headerButtonPadding = TaskStackLayoutAlgorithm.getDimensionForDevice(getContext(),
                 R.dimen.recents_task_view_header_button_padding,
                 R.dimen.recents_task_view_header_button_padding,
                 R.dimen.recents_task_view_header_button_padding,
@@ -438,21 +438,18 @@
         }
     }
 
-    /** Binds the bar view to the task */
-    public void rebindToTask(Task t, boolean touchExplorationEnabled, boolean disabledInSafeMode) {
+    /**
+     * Binds the bar view to the task.
+     */
+    public void bindToTask(Task t, boolean touchExplorationEnabled, boolean disabledInSafeMode) {
         mTask = t;
 
-        // If an activity icon is defined, then we use that as the primary icon to show in the bar,
-        // otherwise, we fall back to the application icon
         int primaryColor = disabledInSafeMode
                 ? mDisabledTaskBarBackgroundColor
                 : t.colorPrimary;
         if (mBackground.getColor() != primaryColor) {
             updateBackgroundColor(primaryColor, mDimAlpha);
         }
-        if (t.icon != null) {
-            mIconView.setImageDrawable(t.icon);
-        }
         if (!mTitleView.getText().toString().equals(t.title)) {
             mTitleView.setText(t.title);
         }
@@ -497,6 +494,16 @@
         }
     }
 
+    /**
+     * Called when the bound task's data has loaded and this view should update to reflect the
+     * changes.
+     */
+    public void onTaskDataLoaded() {
+        if (mTask.icon != null) {
+            mIconView.setImageDrawable(mTask.icon);
+        }
+    }
+
     /** Unbinds the bar view from the task */
     void unbindFromTask(boolean touchExplorationEnabled) {
         mTask = null;
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewThumbnail.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewThumbnail.java
index 4de7713..109dc20 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewThumbnail.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewThumbnail.java
@@ -38,6 +38,7 @@
 import com.android.systemui.R;
 import com.android.systemui.recents.Recents;
 import com.android.systemui.recents.misc.SystemServicesProxy;
+import com.android.systemui.recents.misc.Utilities;
 import com.android.systemui.recents.model.Task;
 
 
@@ -132,7 +133,7 @@
         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
 
         SystemServicesProxy ssp = Recents.getSystemServices();
-        mOrientation = ssp.getDisplayOrientation();
+        mOrientation = Utilities.getAppConfiguration(mContext).orientation;
         mDisplayRect = ssp.getDisplayRect();
     }
 
@@ -302,21 +303,29 @@
         updateThumbnailPaintFilter();
     }
 
-    /** Binds the thumbnail view to the task */
-    void rebindToTask(Task t, ActivityManager.TaskThumbnailInfo thumbnailInfo,
-            boolean disabledInSafeMode) {
+    /**
+     * Binds the thumbnail view to the task.
+     */
+    void bindToTask(Task t, boolean disabledInSafeMode) {
         mTask = t;
         mDisabledInSafeMode = disabledInSafeMode;
-        if (t.thumbnail != null) {
-            setThumbnail(t.thumbnail, thumbnailInfo);
-        } else {
-            setThumbnail(null, null);
-        }
         if (t.colorBackground != 0) {
             mBgFillPaint.setColor(t.colorBackground);
         }
     }
 
+    /**
+     * Called when the bound task's data has loaded and this view should update to reflect the
+     * changes.
+     */
+    void onTaskDataLoaded(ActivityManager.TaskThumbnailInfo thumbnailInfo) {
+        if (mTask.thumbnail != null) {
+            setThumbnail(mTask.thumbnail, thumbnailInfo);
+        } else {
+            setThumbnail(null, null);
+        }
+    }
+
     /** Unbinds the thumbnail view from the task */
     void unbindFromTask() {
         mTask = null;
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
index 7c6c641..cb1128b 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
@@ -910,7 +910,7 @@
         final float fontScale = newConfig.fontScale;
         final int density = newConfig.densityDpi;
         if (density != mDensity || mFontScale != fontScale) {
-            reInflateViews();
+            onDensityOrFontScaleChanged();
             mDensity = density;
             mFontScale = fontScale;
         }
@@ -926,7 +926,7 @@
         }
     }
 
-    protected void reInflateViews() {
+    protected void onDensityOrFontScaleChanged() {
         ArrayList<Entry> activeNotifications = mNotificationData.getActiveNotifications();
         for (int i = 0; i < activeNotifications.size(); i++) {
             Entry entry = activeNotifications.get(i);
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarIconView.java b/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarIconView.java
index e4accf5..870447a 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarIconView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarIconView.java
@@ -18,6 +18,7 @@
 
 import android.app.Notification;
 import android.content.Context;
+import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.graphics.Canvas;
 import android.graphics.Paint;
@@ -39,6 +40,7 @@
 
 public class StatusBarIconView extends AnimatedImageView {
     private static final String TAG = "StatusBarIconView";
+    private boolean mAlwaysScaleIcon;
 
     private StatusBarIcon mIcon;
     @ViewDebug.ExportedProperty private String mSlot;
@@ -49,6 +51,7 @@
     private String mNumberText;
     private Notification mNotification;
     private final boolean mBlocked;
+    private int mDensity;
 
     public StatusBarIconView(Context context, String slot, Notification notification) {
         this(context, slot, notification, false);
@@ -57,7 +60,6 @@
     public StatusBarIconView(Context context, String slot, Notification notification,
             boolean blocked) {
         super(context);
-        final Resources res = context.getResources();
         mBlocked = blocked;
         mSlot = slot;
         mNumberPain = new Paint();
@@ -65,18 +67,37 @@
         mNumberPain.setColor(context.getColor(R.drawable.notification_number_text_color));
         mNumberPain.setAntiAlias(true);
         setNotification(notification);
+        maybeUpdateIconScale();
+        setScaleType(ScaleType.CENTER);
+        mDensity = context.getResources().getDisplayMetrics().densityDpi;
+    }
 
+    private void maybeUpdateIconScale() {
         // We do not resize and scale system icons (on the right), only notification icons (on the
         // left).
-        if (notification != null) {
-            final int outerBounds = res.getDimensionPixelSize(R.dimen.status_bar_icon_size);
-            final int imageBounds = res.getDimensionPixelSize(R.dimen.status_bar_icon_drawing_size);
-            final float scale = (float)imageBounds / (float)outerBounds;
-            setScaleX(scale);
-            setScaleY(scale);
+        if (mNotification != null || mAlwaysScaleIcon) {
+            updateIconScale();
         }
+    }
 
-        setScaleType(ScaleType.CENTER);
+    private void updateIconScale() {
+        Resources res = mContext.getResources();
+        final int outerBounds = res.getDimensionPixelSize(R.dimen.status_bar_icon_size);
+        final int imageBounds = res.getDimensionPixelSize(R.dimen.status_bar_icon_drawing_size);
+        final float scale = (float)imageBounds / (float)outerBounds;
+        setScaleX(scale);
+        setScaleY(scale);
+    }
+
+    @Override
+    protected void onConfigurationChanged(Configuration newConfig) {
+        super.onConfigurationChanged(newConfig);
+        int density = newConfig.densityDpi;
+        if (density != mDensity) {
+            mDensity = density;
+            maybeUpdateIconScale();
+            updateDrawable();
+        }
     }
 
     public void setNotification(Notification notification) {
@@ -87,12 +108,9 @@
     public StatusBarIconView(Context context, AttributeSet attrs) {
         super(context, attrs);
         mBlocked = false;
-        final Resources res = context.getResources();
-        final int outerBounds = res.getDimensionPixelSize(R.dimen.status_bar_icon_size);
-        final int imageBounds = res.getDimensionPixelSize(R.dimen.status_bar_icon_drawing_size);
-        final float scale = (float)imageBounds / (float)outerBounds;
-        setScaleX(scale);
-        setScaleY(scale);
+        mAlwaysScaleIcon = true;
+        updateIconScale();
+        mDensity = context.getResources().getDisplayMetrics().densityDpi;
     }
 
     private static boolean streq(String a, String b) {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/IconMerger.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/IconMerger.java
index 225751a..f86badb 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/IconMerger.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/IconMerger.java
@@ -17,6 +17,7 @@
 package com.android.systemui.statusbar.phone;
 
 import android.content.Context;
+import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.util.AttributeSet;
 import android.view.View;
@@ -28,23 +29,31 @@
     private static final String TAG = "IconMerger";
     private static final boolean DEBUG = false;
 
-    private final int mIconSize;
-    private final int mIconHPadding;
+    private int mIconSize;
+    private int mIconHPadding;
 
     private View mMoreView;
 
     public IconMerger(Context context, AttributeSet attrs) {
         super(context, attrs);
-
-        Resources res = context.getResources();
-        mIconSize = res.getDimensionPixelSize(R.dimen.status_bar_icon_size);
-        mIconHPadding = res.getDimensionPixelSize(R.dimen.status_bar_icon_padding);
-
+        reloadDimens();
         if (DEBUG) {
             setBackgroundColor(0x800099FF);
         }
     }
 
+    private void reloadDimens() {
+        Resources res = mContext.getResources();
+        mIconSize = res.getDimensionPixelSize(R.dimen.status_bar_icon_size);
+        mIconHPadding = res.getDimensionPixelSize(R.dimen.status_bar_icon_padding);
+    }
+
+    @Override
+    protected void onConfigurationChanged(Configuration newConfig) {
+        super.onConfigurationChanged(newConfig);
+        reloadDimens();
+    }
+
     public void setOverflowIndicator(View v) {
         mMoreView = v;
     }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationIconAreaController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationIconAreaController.java
index c4917a1..cbaab14 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationIconAreaController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationIconAreaController.java
@@ -5,6 +5,7 @@
 import android.content.res.Resources;
 import android.graphics.Color;
 import android.graphics.Rect;
+import android.support.annotation.NonNull;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.ImageView;
@@ -17,7 +18,6 @@
 import com.android.systemui.statusbar.notification.NotificationUtils;
 
 import java.util.ArrayList;
-import java.util.List;
 
 /**
  * A controller for the space in the status bar to the left of the system icons. This area is
@@ -51,9 +51,7 @@
      * Initializes the views that will represent the notification area.
      */
     protected void initializeNotificationAreaViews(Context context) {
-        Resources res = context.getResources();
-        mIconSize = res.getDimensionPixelSize(com.android.internal.R.dimen.status_bar_icon_size);
-        mIconHPadding = res.getDimensionPixelSize(R.dimen.status_bar_icon_padding);
+        reloadDimens(context);
 
         LayoutInflater layoutInflater = LayoutInflater.from(context);
         mNotificationIconArea = inflateIconArea(layoutInflater);
@@ -68,6 +66,27 @@
         }
     }
 
+    public void onDensityOrFontScaleChanged(Context context) {
+        reloadDimens(context);
+        final LinearLayout.LayoutParams params = generateIconLayoutParams();
+        for (int i = 0; i < mNotificationIcons.getChildCount(); i++) {
+            View child = mNotificationIcons.getChildAt(i);
+            child.setLayoutParams(params);
+        }
+    }
+
+    @NonNull
+    private LinearLayout.LayoutParams generateIconLayoutParams() {
+        return new LinearLayout.LayoutParams(
+                mIconSize + 2 * mIconHPadding, getHeight());
+    }
+
+    private void reloadDimens(Context context) {
+        Resources res = context.getResources();
+        mIconSize = res.getDimensionPixelSize(com.android.internal.R.dimen.status_bar_icon_size);
+        mIconHPadding = res.getDimensionPixelSize(R.dimen.status_bar_icon_padding);
+    }
+
     /**
      * Returns the view that represents the notification area.
      */
@@ -125,8 +144,7 @@
      * Updates the notifications with the given list of notifications to display.
      */
     public void updateNotificationIcons(NotificationData notificationData) {
-        final LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
-                mIconSize + 2 * mIconHPadding, getHeight());
+        final LinearLayout.LayoutParams params = generateIconLayoutParams();
 
         ArrayList<NotificationData.Entry> activeNotifications =
                 notificationData.getActiveNotifications();
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
index 82806fd..b75c2916 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
@@ -86,6 +86,7 @@
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewGroup.LayoutParams;
+import android.view.ViewParent;
 import android.view.ViewStub;
 import android.view.WindowManager;
 import android.view.WindowManagerGlobal;
@@ -762,14 +763,7 @@
         mStackScroller.setHeadsUpManager(mHeadsUpManager);
         mGroupManager.setOnGroupChangeListener(mStackScroller);
 
-        mKeyguardIconOverflowContainer =
-                (NotificationOverflowContainer) LayoutInflater.from(mContext).inflate(
-                        R.layout.status_bar_notification_keyguard_overflow, mStackScroller, false);
-        mKeyguardIconOverflowContainer.setOnActivatedListener(this);
-        mKeyguardIconOverflowContainer.setOnClickListener(mOverflowClickListener);
-        mStackScroller.setOverflowContainer(mKeyguardIconOverflowContainer);
-
-
+        inflateOverflowContainer();
         inflateEmptyShadeView();
         inflateDismissView();
         mExpandedContents = mStackScroller;
@@ -950,13 +944,62 @@
         return new BatteryControllerImpl(mContext);
     }
 
+    private void inflateOverflowContainer() {
+        mKeyguardIconOverflowContainer =
+                (NotificationOverflowContainer) LayoutInflater.from(mContext).inflate(
+                        R.layout.status_bar_notification_keyguard_overflow, mStackScroller, false);
+        mKeyguardIconOverflowContainer.setOnActivatedListener(this);
+        mKeyguardIconOverflowContainer.setOnClickListener(mOverflowClickListener);
+        mStackScroller.setOverflowContainer(mKeyguardIconOverflowContainer);
+    }
+
     @Override
-    protected void reInflateViews() {
-        super.reInflateViews();
+    protected void onDensityOrFontScaleChanged() {
+        super.onDensityOrFontScaleChanged();
+        mScrimController.onDensityOrFontScaleChanged();
+        mStatusBarView.onDensityOrFontScaleChanged();
+        mBrightnessMirrorController.onDensityOrFontScaleChanged();
+        inflateSignalClusters();
+        mIconController.onDensityOrFontScaleChanged();
         inflateDismissView();
         updateClearAll();
         inflateEmptyShadeView();
         updateEmptyShadeView();
+        inflateOverflowContainer();
+    }
+
+    private void inflateSignalClusters() {
+        SignalClusterView signalClusterView = reinflateSignalCluster(mStatusBarView);
+        mIconController.setSignalCluster(signalClusterView);
+        reinflateSignalCluster(mKeyguardStatusView);
+    }
+
+    private SignalClusterView reinflateSignalCluster(View view) {
+        SignalClusterView signalCluster =
+                (SignalClusterView) view.findViewById(R.id.signal_cluster);
+        if (signalCluster != null) {
+            ViewParent parent = signalCluster.getParent();
+            if (parent instanceof ViewGroup) {
+                ViewGroup viewParent = (ViewGroup) parent;
+                int index = viewParent.indexOfChild(signalCluster);
+                viewParent.removeView(signalCluster);
+                SignalClusterView newCluster = (SignalClusterView) LayoutInflater.from(mContext)
+                        .inflate(R.layout.signal_cluster_view, viewParent, false);
+                ViewGroup.MarginLayoutParams layoutParams =
+                        (ViewGroup.MarginLayoutParams) viewParent.getLayoutParams();
+                layoutParams.setMarginsRelative(
+                        mContext.getResources().getDimensionPixelSize(
+                                R.dimen.signal_cluster_margin_start),
+                        0, 0, 0);
+                newCluster.setLayoutParams(layoutParams);
+                newCluster.setSecurityController(mSecurityController);
+                newCluster.setNetworkController(mNetworkController);
+                viewParent.addView(newCluster, index);
+                return newCluster;
+            }
+            return signalCluster;
+        }
+        return null;
     }
 
     private void inflateEmptyShadeView() {
@@ -3250,17 +3293,17 @@
     // SystemUIService notifies SystemBars of configuration changes, which then calls down here
     @Override
     protected void onConfigurationChanged(Configuration newConfig) {
+        updateResources();
+        updateDisplaySize(); // populates mDisplayMetrics
         super.onConfigurationChanged(newConfig); // calls refreshLayout
 
         if (DEBUG) {
             Log.v(TAG, "configuration changed: " + mContext.getResources().getConfiguration());
         }
-        updateDisplaySize(); // populates mDisplayMetrics
 
-        updateResources();
         repositionNavigationBar();
         updateRowStates();
-        mIconController.updateResources();
+        mIconController.defineSlots();
         mScreenPinningRequest.onConfigurationChanged();
         mNetworkController.onConfigurationChanged();
     }
@@ -3331,7 +3374,7 @@
         mMaxAllowedKeyguardNotifications = res.getInteger(
                 R.integer.keyguard_max_notification_count);
 
-        if (DEBUG) Log.v(TAG, "updateResources");
+        if (DEBUG) Log.v(TAG, "defineSlots");
     }
 
     // Visibility reporting
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java
index cc3b4bd..c80b3ad 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java
@@ -21,10 +21,12 @@
 import android.util.EventLog;
 import android.view.MotionEvent;
 import android.view.View;
+import android.view.ViewGroup;
 import android.view.accessibility.AccessibilityEvent;
 
 import com.android.systemui.DejankUtils;
 import com.android.systemui.EventLogTags;
+import com.android.systemui.R;
 
 public class PhoneStatusBarView extends PanelBar {
     private static final String TAG = "PhoneStatusBarView";
@@ -185,4 +187,11 @@
         float scrimFraction = Math.max(mPanelFraction, mMinFraction);
         mScrimController.setPanelExpansion(scrimFraction);
     }
+
+    public void onDensityOrFontScaleChanged() {
+        ViewGroup.LayoutParams layoutParams = getLayoutParams();
+        layoutParams.height = getResources().getDimensionPixelSize(
+                R.dimen.status_bar_height);
+        setLayoutParams(layoutParams);
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/ScrimController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/ScrimController.java
index 3eda320..cf5277f 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/ScrimController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/ScrimController.java
@@ -24,6 +24,7 @@
 import android.graphics.Color;
 import android.graphics.Rect;
 import android.view.View;
+import android.view.ViewGroup;
 import android.view.ViewTreeObserver;
 import android.view.animation.DecelerateInterpolator;
 import android.view.animation.Interpolator;
@@ -519,4 +520,11 @@
     public void setScrimBehindChangeRunnable(Runnable changeRunnable) {
         mScrimBehind.setChangeRunnable(changeRunnable);
     }
+
+    public void onDensityOrFontScaleChanged() {
+        ViewGroup.LayoutParams layoutParams = mHeadsUpScrim.getLayoutParams();
+        layoutParams.height = mHeadsUpScrim.getResources().getDimensionPixelSize(
+                R.dimen.heads_up_scrim_height);
+        mHeadsUpScrim.setLayoutParams(layoutParams);
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconController.java
index a40aa83..f415ae5 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconController.java
@@ -76,6 +76,7 @@
     private View mNotificationIconAreaInner;
 
     private BatteryMeterView mBatteryMeterView;
+    private BatteryMeterView mBatteryMeterViewKeyguard;
     private TextView mClock;
 
     private int mIconSize;
@@ -129,39 +130,43 @@
         mStatusIconsKeyguard = (LinearLayout) keyguardStatusBar.findViewById(R.id.statusIcons);
 
         mBatteryMeterView = (BatteryMeterView) statusBar.findViewById(R.id.battery);
-        maybeScaleBatteryMeterView(context);
+        mBatteryMeterViewKeyguard = (BatteryMeterView) keyguardStatusBar.findViewById(R.id.battery);
+        scaleBatteryMeterViews(context);
 
         mClock = (TextView) statusBar.findViewById(R.id.clock);
         mDarkModeIconColorSingleTone = context.getColor(R.color.dark_mode_icon_color_single_tone);
         mLightModeIconColorSingleTone = context.getColor(R.color.light_mode_icon_color_single_tone);
         mHandler = new Handler();
-        updateResources();
+        defineSlots();
+        loadDimens();
 
         TunerService.get(mContext).addTunable(this, ICON_BLACKLIST);
     }
 
+    public void setSignalCluster(SignalClusterView signalCluster) {
+        mSignalCluster = signalCluster;
+    }
+
     /**
-     * Looks up the scale factor for status bar icons and scales the battery view by that amount
-     * if appropriate.
+     * Looks up the scale factor for status bar icons and scales the battery view by that amount.
      */
-    private void maybeScaleBatteryMeterView(Context context) {
+    private void scaleBatteryMeterViews(Context context) {
         Resources res = context.getResources();
         TypedValue typedValue = new TypedValue();
 
         res.getValue(R.dimen.status_bar_icon_scale_factor, typedValue, true);
         float iconScaleFactor = typedValue.getFloat();
 
-        if (iconScaleFactor == 1.f) {
-            return;
-        }
-
-        float batteryHeight = res.getDimension(R.dimen.status_bar_battery_icon_height);
-        float batteryWidth = res.getDimension(R.dimen.status_bar_battery_icon_width);
+        int batteryHeight = res.getDimensionPixelSize(R.dimen.status_bar_battery_icon_height);
+        int batteryWidth = res.getDimensionPixelSize(R.dimen.status_bar_battery_icon_width);
+        int marginBottom = res.getDimensionPixelSize(R.dimen.battery_margin_bottom);
 
         LinearLayout.LayoutParams scaledLayoutParams = new LinearLayout.LayoutParams(
                 (int) (batteryWidth * iconScaleFactor), (int) (batteryHeight * iconScaleFactor));
+        scaledLayoutParams.setMarginsRelative(0, 0, 0, marginBottom);
 
         mBatteryMeterView.setLayoutParams(scaledLayoutParams);
+        mBatteryMeterViewKeyguard.setLayoutParams(scaledLayoutParams);
     }
 
     @Override
@@ -185,15 +190,16 @@
             setIcon(views.get(i).getSlot(), views.get(i).getStatusBarIcon());
         }
     }
-
-    public void updateResources() {
+    private void loadDimens() {
         mIconSize = mContext.getResources().getDimensionPixelSize(
                 com.android.internal.R.dimen.status_bar_icon_size);
         mIconHPadding = mContext.getResources().getDimensionPixelSize(
                 R.dimen.status_bar_icon_padding);
+    }
+
+    public void defineSlots() {
         defineSlots(mContext.getResources().getStringArray(
                 com.android.internal.R.array.config_statusBarIcons));
-        FontSizeUtils.updateFontSize(mClock, R.dimen.status_bar_clock_size);
     }
 
     private void addSystemIcon(int index, StatusBarIcon icon) {
@@ -571,4 +577,35 @@
         }
         return ret;
     }
+
+    public void onDensityOrFontScaleChanged() {
+        loadDimens();
+        mNotificationIconAreaController.onDensityOrFontScaleChanged(mContext);
+        updateClock();
+        for (int i = 0; i < mStatusIcons.getChildCount(); i++) {
+            View child = mStatusIcons.getChildAt(i);
+            LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
+                    ViewGroup.LayoutParams.WRAP_CONTENT, mIconSize);
+            lp.setMargins(mIconHPadding, 0, mIconHPadding, 0);
+            child.setLayoutParams(lp);
+        }
+        for (int i = 0; i < mStatusIconsKeyguard.getChildCount(); i++) {
+            View child = mStatusIconsKeyguard.getChildAt(i);
+            LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
+                    ViewGroup.LayoutParams.WRAP_CONTENT, mIconSize);
+            child.setLayoutParams(lp);
+        }
+        scaleBatteryMeterViews(mContext);
+    }
+
+    private void updateClock() {
+        FontSizeUtils.updateFontSize(mClock, R.dimen.status_bar_clock_size);
+        mClock.setPaddingRelative(
+                mContext.getResources().getDimensionPixelSize(
+                        R.dimen.status_bar_clock_starting_padding),
+                0,
+                mContext.getResources().getDimensionPixelSize(
+                        R.dimen.status_bar_clock_end_padding),
+                0);
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconList.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconList.java
index 62d6b76..97b31f2 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconList.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconList.java
@@ -26,10 +26,13 @@
     private ArrayList<StatusBarIcon> mIcons = new ArrayList<>();
 
     public void defineSlots(String[] slots) {
+        mSlots.clear();
         final int N = slots.length;
         for (int i=0; i < N; i++) {
             mSlots.add(slots[i]);
-            mIcons.add(null);
+            if (mIcons.size() < mSlots.size()) {
+                mIcons.add(null);
+            }
         }
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/BrightnessMirrorController.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/BrightnessMirrorController.java
index ab34768..7a6d080 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/BrightnessMirrorController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/BrightnessMirrorController.java
@@ -16,6 +16,7 @@
 
 package com.android.systemui.statusbar.policy;
 
+import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewPropertyAnimator;
 import android.widget.FrameLayout;
@@ -33,12 +34,14 @@
     public long TRANSITION_DURATION_OUT = 150;
     public long TRANSITION_DURATION_IN = 200;
 
+    private final StatusBarWindowView mStatusBarWindow;
     private final ScrimView mScrimBehind;
-    private final View mBrightnessMirror;
     private final View mNotificationPanel;
     private final int[] mInt2Cache = new int[2];
+    private View mBrightnessMirror;
 
     public BrightnessMirrorController(StatusBarWindowView statusBarWindow) {
+        mStatusBarWindow = statusBarWindow;
         mScrimBehind = (ScrimView) statusBarWindow.findViewById(R.id.scrim_behind);
         mBrightnessMirror = statusBarWindow.findViewById(R.id.brightness_mirror);
         mNotificationPanel = statusBarWindow.findViewById(R.id.notification_panel);
@@ -56,11 +59,11 @@
         inAnimation(mNotificationPanel.animate())
                 .withLayer()
                 .withEndAction(new Runnable() {
-            @Override
-            public void run() {
-                mBrightnessMirror.setVisibility(View.INVISIBLE);
-            }
-        });
+                    @Override
+                    public void run() {
+                        mBrightnessMirror.setVisibility(View.INVISIBLE);
+                    }
+                });
     }
 
     private ViewPropertyAnimator outAnimation(ViewPropertyAnimator a) {
@@ -104,4 +107,12 @@
                 R.integer.notification_panel_layout_gravity);
         mBrightnessMirror.setLayoutParams(lp);
     }
+
+    public void onDensityOrFontScaleChanged() {
+        int index = mStatusBarWindow.indexOfChild(mBrightnessMirror);
+        mStatusBarWindow.removeView(mBrightnessMirror);
+        mBrightnessMirror = LayoutInflater.from(mBrightnessMirror.getContext()).inflate(
+                R.layout.brightness_mirror, mStatusBarWindow, false);
+        mStatusBarWindow.addView(mBrightnessMirror, index);
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java b/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
index 8b52bf6..c962606 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
@@ -747,7 +747,7 @@
     public boolean updateSwipeProgress(View animView, boolean dismissable, float swipeProgress) {
         if (!mIsExpanded && isPinnedHeadsUp(animView) && canChildBeDismissed(animView)) {
             mScrimController.setTopHeadsUpDragAmount(animView,
-                    Math.min(Math.abs(swipeProgress - 1.0f), 1.0f));
+                    Math.min(Math.abs(swipeProgress / 2f - 1.0f), 1.0f));
         }
         return true; // Don't fade out the notification
     }
@@ -3116,8 +3116,13 @@
     }
 
     public void setOverflowContainer(NotificationOverflowContainer overFlowContainer) {
+        int index = -1;
+        if (mOverflowContainer != null) {
+            index = indexOfChild(mOverflowContainer);
+            removeView(mOverflowContainer);
+        }
         mOverflowContainer = overFlowContainer;
-        addView(mOverflowContainer);
+        addView(mOverflowContainer, index);
     }
 
     public void updateOverflowContainerVisibility(boolean visible) {
diff --git a/services/core/java/com/android/server/am/ActivityStackSupervisor.java b/services/core/java/com/android/server/am/ActivityStackSupervisor.java
index 8f7f396..97ee744 100644
--- a/services/core/java/com/android/server/am/ActivityStackSupervisor.java
+++ b/services/core/java/com/android/server/am/ActivityStackSupervisor.java
@@ -2120,7 +2120,7 @@
             if (onTop) {
                 for (int i = 0; i < size; i++) {
                     moveTaskToStackLocked(tasks.get(i).taskId,
-                            FULLSCREEN_WORKSPACE_STACK_ID, onTop, !FORCE_FOCUS,
+                            FULLSCREEN_WORKSPACE_STACK_ID, onTop, onTop /*forceFocus*/,
                             "moveTasksToFullscreenStack", ANIMATE);
                 }
             } else {
diff --git a/services/voiceinteraction/java/com/android/server/soundtrigger/SoundTriggerHelper.java b/services/voiceinteraction/java/com/android/server/soundtrigger/SoundTriggerHelper.java
index 53377f9..612e5e8 100644
--- a/services/voiceinteraction/java/com/android/server/soundtrigger/SoundTriggerHelper.java
+++ b/services/voiceinteraction/java/com/android/server/soundtrigger/SoundTriggerHelper.java
@@ -188,13 +188,13 @@
             }
 
             // Process existing model first.
-            if (model != null && model.getModelId() != soundModel.uuid) {
+            if (model != null && !model.getModelId().equals(soundModel.uuid)) {
                 // The existing model has a different UUID, should be replaced.
                 int status = cleanUpExistingKeyphraseModel(model);
-                removeKeyphraseModelLocked(keyphraseId);
                 if (status != STATUS_OK) {
                     return status;
                 }
+                removeKeyphraseModelLocked(keyphraseId);
                 model = null;
             }
 
@@ -478,8 +478,6 @@
             } else {
                 // Clear the ModelData state if successful.
                 modelData.clearState();
-                modelData.clearCallback();
-                modelData.setRecognitionConfig(null);
             }
         }
         return status;
@@ -498,15 +496,12 @@
             // Stop all recognition models.
             for (ModelData model : mModelDataMap.values()) {
                 if (model.isModelStarted()) {
-                    model.setRequested(false);
                     int status = stopRecognitionLocked(model,
                             false /* do not notify for synchronous calls */);
                     if (status != STATUS_OK) {
                         Slog.w(TAG, "Error stopping keyphrase model: " + model.getHandle());
                     }
                     model.clearState();
-                    model.clearCallback();
-                    model.setRecognitionConfig(null);
                 }
             }
             internalClearGlobalStateLocked();
@@ -849,7 +844,6 @@
     private void internalClearModelStateLocked() {
         for (ModelData modelData : mModelDataMap.values()) {
             modelData.clearState();
-            modelData.clearCallback();
         }
     }
 
@@ -1194,6 +1188,9 @@
         synchronized void clearState() {
             mModelState = MODEL_NOTLOADED;
             mModelHandle = INVALID_VALUE;
+            mRecognitionConfig = null;
+            mRequested = false;
+            mCallback = null;
         }
 
         synchronized void clearCallback() {