diff --git a/quickstep/libs/sysui_shared.jar b/quickstep/libs/sysui_shared.jar
index 74d3cba..f508eab 100644
--- a/quickstep/libs/sysui_shared.jar
+++ b/quickstep/libs/sysui_shared.jar
Binary files differ
diff --git a/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java b/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java
index 59b637e..549c65e 100644
--- a/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java
+++ b/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java
@@ -595,8 +595,9 @@
                                          Runnable finishedCallback) {
                 Handler handler = mLauncher.getWindow().getDecorView().getHandler();
                 postAtFrontOfQueueAsynchronously(handler, () -> {
-                    if ((Utilities.getPrefs(mLauncher).getBoolean("pref_use_screenshot_animation",
-                            true) && mLauncher.isInState(LauncherState.OVERVIEW))
+                    if ((Utilities.getPrefs(mLauncher)
+                            .getBoolean("pref_use_screenshot_for_swipe_up", false)
+                            && mLauncher.isInState(LauncherState.OVERVIEW))
                             || !isLauncherInSetOfOpeningTargets(targets)) {
                         // We use a separate transition for Overview mode. And we can skip the
                         // animation in cases where Launcher is not in the set of opening targets.
diff --git a/quickstep/src/com/android/quickstep/OtherActivityTouchConsumer.java b/quickstep/src/com/android/quickstep/OtherActivityTouchConsumer.java
index d8f7aaf..53eb910 100644
--- a/quickstep/src/com/android/quickstep/OtherActivityTouchConsumer.java
+++ b/quickstep/src/com/android/quickstep/OtherActivityTouchConsumer.java
@@ -23,6 +23,9 @@
 import static android.view.MotionEvent.INVALID_POINTER_ID;
 
 import static com.android.quickstep.RemoteRunnable.executeSafely;
+import static com.android.systemui.shared.system.NavigationBarCompat.HIT_TARGET_BACK;
+import static com.android.systemui.shared.system.NavigationBarCompat.HIT_TARGET_HOME;
+import static com.android.systemui.shared.system.NavigationBarCompat.HIT_TARGET_NONE;
 
 import android.app.ActivityManager.RunningTaskInfo;
 import android.app.ActivityOptions;
@@ -52,6 +55,7 @@
 import com.android.systemui.shared.system.ActivityManagerWrapper;
 import com.android.systemui.shared.system.AssistDataReceiver;
 import com.android.systemui.shared.system.BackgroundExecutor;
+import com.android.systemui.shared.system.NavigationBarCompat.HitTarget;
 import com.android.systemui.shared.system.RecentsAnimationControllerCompat;
 import com.android.systemui.shared.system.RecentsAnimationListener;
 import com.android.systemui.shared.system.RemoteAnimationTargetCompat;
@@ -83,6 +87,7 @@
     private BaseSwipeInteractionHandler mInteractionHandler;
     private int mDisplayRotation;
     private Rect mStableInsets = new Rect();
+    private @HitTarget int mDownHitTarget = HIT_TARGET_NONE;
 
     private VelocityTracker mVelocityTracker;
 
@@ -99,6 +104,11 @@
     }
 
     @Override
+    public void setDownHitTarget(@HitTarget int downHitTarget) {
+        mDownHitTarget = downHitTarget;
+    }
+
+    @Override
     public void accept(MotionEvent ev) {
         if (mVelocityTracker == null) {
             return;
@@ -112,8 +122,9 @@
                 mTouchSlop = ViewConfiguration.get(this).getScaledTouchSlop();
                 mTouchThresholdCrossed = false;
 
-                // Start the window animation on down to give more time for launcher to draw
-                if (!isUsingScreenShot()) {
+                // Start the window animation on down to give more time for launcher to draw if the
+                // user didn't start the gesture over the back button
+                if (mDownHitTarget != HIT_TARGET_BACK && !isUsingScreenShot()) {
                     startTouchTrackingForWindowAnimation();
                 }
 
@@ -155,6 +166,10 @@
 
                         if (isUsingScreenShot()) {
                             startTouchTrackingForScreenshotAnimation();
+                        } else if (mDownHitTarget == HIT_TARGET_BACK) {
+                            // If the window animation was deferred on DOWN due to it starting over
+                            // the back button, then start it now
+                            startTouchTrackingForWindowAnimation();
                         }
 
                         notifyGestureStarted();
@@ -195,7 +210,7 @@
     }
 
     private boolean isUsingScreenShot() {
-        return Utilities.getPrefs(this).getBoolean("pref_use_screenshot_animation", true);
+        return Utilities.getPrefs(this).getBoolean("pref_use_screenshot_for_swipe_up", false);
     }
 
     /**
@@ -331,6 +346,10 @@
             // Since we start touch tracking on DOWN, we may reach this state without actually
             // starting the gesture. In that case, just cleanup immediately.
             reset();
+
+            // Also clean up in case the system has handled the UP and canceled the animation before
+            // we had a chance to start the recents animation. In such a case, we will not receive
+            ActivityManagerWrapper.getInstance().cancelRecentsAnimation();
         }
         mVelocityTracker.recycle();
         mVelocityTracker = null;
diff --git a/quickstep/src/com/android/quickstep/TouchConsumer.java b/quickstep/src/com/android/quickstep/TouchConsumer.java
index 77480af..5cfa8df 100644
--- a/quickstep/src/com/android/quickstep/TouchConsumer.java
+++ b/quickstep/src/com/android/quickstep/TouchConsumer.java
@@ -20,6 +20,8 @@
 import android.support.annotation.IntDef;
 import android.view.MotionEvent;
 
+import com.android.systemui.shared.system.NavigationBarCompat.HitTarget;
+
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.function.Consumer;
@@ -50,6 +52,8 @@
         return false;
     }
 
+    default void setDownHitTarget(@HitTarget int downHitTarget) { }
+
     default void updateTouchTracking(@InteractionType int interactionType) { }
 
     default void onQuickScrubEnd() { }
diff --git a/quickstep/src/com/android/quickstep/TouchInteractionService.java b/quickstep/src/com/android/quickstep/TouchInteractionService.java
index 080537e..75fd78e 100644
--- a/quickstep/src/com/android/quickstep/TouchInteractionService.java
+++ b/quickstep/src/com/android/quickstep/TouchInteractionService.java
@@ -38,6 +38,7 @@
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.IBinder;
+import android.os.RemoteException;
 import android.util.Log;
 import android.view.Choreographer;
 import android.view.MotionEvent;
@@ -52,6 +53,7 @@
 import com.android.systemui.shared.recents.IOverviewProxy;
 import com.android.systemui.shared.recents.ISystemUiProxy;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
+import com.android.systemui.shared.system.NavigationBarCompat.HitTarget;
 
 /**
  * Service connected by system-UI for handling touch interaction.
@@ -71,6 +73,11 @@
     private final IBinder mMyBinder = new IOverviewProxy.Stub() {
 
         @Override
+        public void onPreMotionEvent(@HitTarget int downHitTarget) throws RemoteException {
+            onBinderPreMotionEvent(downHitTarget);
+        }
+
+        @Override
         public void onMotionEvent(MotionEvent ev) {
             onBinderMotionEvent(ev);
         }
@@ -166,23 +173,25 @@
         return mMyBinder;
     }
 
-    private void onBinderMotionEvent(MotionEvent ev) {
-        if (ev.getActionMasked() == ACTION_DOWN) {
-            mRunningTask = mAM.getRunningTask();
+    private void onBinderPreMotionEvent(@HitTarget int downHitTarget) {
+        mRunningTask = mAM.getRunningTask();
 
-            mCurrentConsumer.reset();
-            if (mRunningTask == null) {
-                mCurrentConsumer = mNoOpTouchConsumer;
-            } else if (mRunningTask.topActivity.equals(mLauncher)) {
-                mCurrentConsumer = getLauncherConsumer();
-            } else {
-                mCurrentConsumer = getOtherActivityConsumer();
-            }
-
-            mEventQueue.setConsumer(mCurrentConsumer);
-            mEventQueue.setInterimChoreographer(mCurrentConsumer.shouldUseBackgroundConsumer()
-                    ? mBackgroundThreadChoreographer : null);
+        mCurrentConsumer.reset();
+        if (mRunningTask == null) {
+            mCurrentConsumer = mNoOpTouchConsumer;
+        } else if (mRunningTask.topActivity.equals(mLauncher)) {
+            mCurrentConsumer = getLauncherConsumer();
+        } else {
+            mCurrentConsumer = getOtherActivityConsumer();
         }
+
+        mCurrentConsumer.setDownHitTarget(downHitTarget);
+        mEventQueue.setConsumer(mCurrentConsumer);
+        mEventQueue.setInterimChoreographer(mCurrentConsumer.shouldUseBackgroundConsumer()
+                ? mBackgroundThreadChoreographer : null);
+    }
+
+    private void onBinderMotionEvent(MotionEvent ev) {
         mCurrentConsumer.preProcessMotionEvent(ev);
         mEventQueue.queue(ev);
     }
diff --git a/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java b/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java
index 5d0a6d1..9bcbf34 100644
--- a/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java
+++ b/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java
@@ -62,6 +62,7 @@
 import com.android.launcher3.util.TraceHelper;
 import com.android.quickstep.TouchConsumer.InteractionType;
 import com.android.systemui.shared.recents.model.ThumbnailData;
+import com.android.systemui.shared.system.InputConsumerController;
 import com.android.systemui.shared.system.RecentsAnimationControllerCompat;
 import com.android.systemui.shared.system.RemoteAnimationTargetCompat;
 import com.android.systemui.shared.system.TransactionCompat;
@@ -162,12 +163,16 @@
     private @InteractionType int mInteractionType = INTERACTION_NORMAL;
     private boolean mDeferredQuickScrubEnd;
 
+    private InputConsumerController mInputConsumer =
+            InputConsumerController.getRecentsAnimationInputConsumer();
+
     private final RecentsAnimationWrapper mRecentsAnimationWrapper = new RecentsAnimationWrapper();
     private Matrix mTmpMatrix = new Matrix();
 
     WindowTransformSwipeHandler(RunningTaskInfo runningTaskInfo, Context context) {
         mContext = context;
         mRunningTaskId = runningTaskInfo.id;
+        mInputConsumer.registerInputConsumer();
         initStateCallbacks();
     }
 
@@ -529,6 +534,7 @@
 
         setStateOnUiThread(STATE_GESTURE_STARTED);
         mGestureStarted = true;
+        mRecentsAnimationWrapper.enableInputConsumer();
     }
 
     /**
@@ -600,6 +606,7 @@
         }
 
         clearReference();
+        mInputConsumer.unregisterInputConsumer();
     }
 
     private void invalidateHandlerWithLauncher() {
diff --git a/res/values/config.xml b/res/values/config.xml
index 3dddac2..065ad36 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -101,6 +101,9 @@
     <!-- Name of a subclass of com.android.launcher3.util.InstantAppResolver. Can be empty. -->
     <string name="instant_app_resolver_class" translatable="false"></string>
 
+    <!-- Name of a main process initializer class. -->
+    <string name="main_process_initializer_class" translatable="false"></string>
+
     <!-- Package name of the default wallpaper picker. -->
     <string name="wallpaper_picker_package" translatable="false"></string>
 
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 3fde58b..f6abae8 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -294,10 +294,6 @@
         }
         TraceHelper.beginSection("Launcher-onCreate");
 
-        if (mLauncherCallbacks != null) {
-            mLauncherCallbacks.preOnCreate();
-        }
-
         WallpaperColorInfo wallpaperColorInfo = WallpaperColorInfo.getInstance(this);
         wallpaperColorInfo.setOnThemeChangeListener(this);
         overrideTheme(wallpaperColorInfo.isDark(), wallpaperColorInfo.supportsDarkText());
diff --git a/src/com/android/launcher3/LauncherCallbacks.java b/src/com/android/launcher3/LauncherCallbacks.java
index ed7bf3d..35faaea 100644
--- a/src/com/android/launcher3/LauncherCallbacks.java
+++ b/src/com/android/launcher3/LauncherCallbacks.java
@@ -37,7 +37,6 @@
      * Activity life-cycle methods. These methods are triggered after
      * the code in the corresponding Launcher method is executed.
      */
-    void preOnCreate();
     void onCreate(Bundle savedInstanceState);
     void onResume();
     void onStart();
diff --git a/src/com/android/launcher3/LauncherProvider.java b/src/com/android/launcher3/LauncherProvider.java
index 98568e4..138ea0f 100644
--- a/src/com/android/launcher3/LauncherProvider.java
+++ b/src/com/android/launcher3/LauncherProvider.java
@@ -54,7 +54,6 @@
 import com.android.launcher3.LauncherSettings.WorkspaceScreens;
 import com.android.launcher3.compat.UserManagerCompat;
 import com.android.launcher3.config.FeatureFlags;
-import com.android.launcher3.graphics.IconShapeOverride;
 import com.android.launcher3.logging.FileLog;
 import com.android.launcher3.model.DbDowngradeHelper;
 import com.android.launcher3.provider.LauncherDbUtils;
@@ -116,11 +115,8 @@
         mListenerHandler = new Handler(mListenerWrapper);
 
         // The content provider exists for the entire duration of the launcher main process and
-        // is the first component to get created. Initializing FileLog here ensures that it's
-        // always available in the main process.
-        FileLog.setDir(getContext().getApplicationContext().getFilesDir());
-        IconShapeOverride.apply(getContext());
-        SessionCommitReceiver.applyDefaultUserPrefs(getContext());
+        // is the first component to get created.
+        MainProcessInitializer.initialize(getContext().getApplicationContext());
         return true;
     }
 
diff --git a/src/com/android/launcher3/MainProcessInitializer.java b/src/com/android/launcher3/MainProcessInitializer.java
new file mode 100644
index 0000000..462eadb
--- /dev/null
+++ b/src/com/android/launcher3/MainProcessInitializer.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3;
+
+import android.content.Context;
+
+import com.android.launcher3.graphics.IconShapeOverride;
+import com.android.launcher3.logging.FileLog;
+
+/**
+ * Utility class to handle one time initializations of the main process
+ */
+public class MainProcessInitializer {
+
+    public static void initialize(Context context) {
+        Utilities.getOverrideObject(
+                MainProcessInitializer.class, context, R.string.main_process_initializer_class)
+                .init(context);
+    }
+
+    protected void init(Context context) {
+        FileLog.setDir(context.getApplicationContext().getFilesDir());
+        IconShapeOverride.apply(context);
+        SessionCommitReceiver.applyDefaultUserPrefs(context);
+    }
+}