diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 3af38f3..ce6fb21 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -51,10 +51,8 @@
     <uses-permission android:name="android.permission.CALL_PHONE" />
     <uses-permission android:name="android.permission.SET_WALLPAPER" />
     <uses-permission android:name="android.permission.SET_WALLPAPER_HINTS" />
-    <uses-permission android:name="android.permission.VIBRATE" />
     <uses-permission android:name="android.permission.BIND_APPWIDGET" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
-    <uses-permission android:name="android.permission.BROADCAST_STICKY"/>
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <uses-permission android:name="com.android.launcher.permission.READ_SETTINGS" />
     <uses-permission android:name="com.android.launcher.permission.WRITE_SETTINGS" />
@@ -203,12 +201,6 @@
             </intent-filter>
         </receiver>
 
-        <receiver android:name="com.android.launcher3.StartupReceiver" >
-            <intent-filter>
-                <action android:name="android.intent.action.BOOT_COMPLETED" />
-            </intent-filter>
-        </receiver>
-
         <!-- The settings provider contains Home's data, like the workspace favorites -->
         <provider
             android:name="com.android.launcher3.LauncherProvider"
diff --git a/res/layout/user_folder.xml b/res/layout/user_folder.xml
index ecf7def..bf32789 100644
--- a/res/layout/user_folder.xml
+++ b/res/layout/user_folder.xml
@@ -20,7 +20,8 @@
     android:layout_height="wrap_content"
     android:background="@drawable/quantum_panel"
     android:elevation="5dp"
-    android:orientation="vertical" >
+    android:orientation="vertical"
+    android:descendantFocusability="afterDescendants" >
 
     <FrameLayout
         android:id="@+id/folder_content_wrapper"
diff --git a/res/values/attrs.xml b/res/values/attrs.xml
index 827332a..c2017e2 100644
--- a/res/values/attrs.xml
+++ b/res/values/attrs.xml
@@ -75,10 +75,6 @@
     <!-- PagedView specific attributes. These attributes are used to customize
          a PagedView view in XML files. -->
     <declare-styleable name="PagedView">
-        <!-- A spacing override for the icons within a page -->
-        <attr name="pageLayoutWidthGap" format="dimension" />
-        <attr name="pageLayoutHeightGap" format="dimension" />
-
         <!-- The page indicator for this workspace -->
         <attr name="pageIndicator" format="reference" />
     </declare-styleable>
diff --git a/res/values/config.xml b/res/values/config.xml
index b2ba7a9..0f18dff 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -74,10 +74,6 @@
          filter the activities shown in the launcher. Can be empty. -->
     <string name="app_filter_class" translatable="false"></string>
 
-    <!-- Name of a subclass of com.android.launcher3.BuildInfo used to
-         get build information. Can be empty. -->
-    <string name="build_info_class" translatable="false"></string>
-
 <!-- Accessibility actions -->
     <item type="id" name="action_remove" />
     <item type="id" name="action_uninstall" />
diff --git a/src/com/android/launcher3/AnotherWindowDropTarget.java b/src/com/android/launcher3/AnotherWindowDropTarget.java
new file mode 100644
index 0000000..aff36ae
--- /dev/null
+++ b/src/com/android/launcher3/AnotherWindowDropTarget.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2015 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 android.graphics.PointF;
+import android.graphics.Rect;
+
+/**
+ * Drop target used when another window (i.e. another process) has accepted a global system drag.
+ * If the accepted item was a shortcut, we delete it from Launcher.
+ */
+public class AnotherWindowDropTarget implements DropTarget {
+    final Launcher mLauncher;
+
+    AnotherWindowDropTarget (Context context) { mLauncher = (Launcher) context; }
+
+    @Override
+    public boolean isDropEnabled() { return true; }
+
+    @Override
+    public void onDrop(DragObject dragObject) {
+        dragObject.deferDragViewCleanupPostAnimation = false;
+        LauncherModel.deleteItemFromDatabase(mLauncher, (ShortcutInfo) dragObject.dragInfo);
+    }
+
+    @Override
+    public void onDragEnter(DragObject dragObject) {}
+
+    @Override
+    public void onDragOver(DragObject dragObject) {}
+
+    @Override
+    public void onDragExit(DragObject dragObject) {}
+
+    @Override
+    public void onFlingToDelete(DragObject dragObject, PointF vec) {}
+
+    @Override
+    public boolean acceptDrop(DragObject dragObject) {
+        return dragObject.dragInfo instanceof ShortcutInfo;
+    }
+
+    @Override
+    public void prepareAccessibilityDrop() {}
+
+    // These methods are implemented in Views
+    @Override
+    public void getHitRectRelativeToDragLayer(Rect outRect) {}
+
+    @Override
+    public void getLocationInDragLayer(int[] loc) {}
+
+    @Override
+    public int getLeft() { return 0; }
+
+    @Override
+    public int getTop() { return 0; }
+}
diff --git a/src/com/android/launcher3/AppInfo.java b/src/com/android/launcher3/AppInfo.java
index c95d558..7249c64 100644
--- a/src/com/android/launcher3/AppInfo.java
+++ b/src/com/android/launcher3/AppInfo.java
@@ -28,13 +28,11 @@
 import com.android.launcher3.util.ComponentKey;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 
 /**
  * Represents an app in AllAppsView.
  */
 public class AppInfo extends ItemInfo {
-    private static final String TAG = "Launcher3.AppInfo";
 
     /**
      * The intent used to start the application.
@@ -118,8 +116,7 @@
         return "ApplicationInfo(title=" + title + " id=" + this.id
                 + " type=" + this.itemType + " container=" + this.container
                 + " screen=" + screenId + " cellX=" + cellX + " cellY=" + cellY
-                + " spanX=" + spanX + " spanY=" + spanY + " dropPos=" + Arrays.toString(dropPos)
-                + " user=" + user + ")";
+                + " spanX=" + spanX + " spanY=" + spanY + " user=" + user + ")";
     }
 
     /**
@@ -128,7 +125,7 @@
     public static void dumpApplicationInfoList(String tag, String label, ArrayList<AppInfo> list) {
         Log.d(tag, label + " size=" + list.size());
         for (AppInfo info: list) {
-            Log.d(tag, "   title=\"" + info.title + "\" iconBitmap=" + info.iconBitmap 
+            Log.d(tag, "   title=\"" + info.title + "\" iconBitmap=" + info.iconBitmap
                     + " firstInstallTime=" + info.firstInstallTime
                     + " componentName=" + info.componentName.getPackageName());
         }
diff --git a/src/com/android/launcher3/AppWidgetResizeFrame.java b/src/com/android/launcher3/AppWidgetResizeFrame.java
index e6bf525..c87074d 100644
--- a/src/com/android/launcher3/AppWidgetResizeFrame.java
+++ b/src/com/android/launcher3/AppWidgetResizeFrame.java
@@ -441,10 +441,10 @@
             PropertyValuesHolder y = PropertyValuesHolder.ofInt("y", lp.y, newY);
             ObjectAnimator oa =
                     LauncherAnimUtils.ofPropertyValuesHolder(lp, this, width, height, x, y);
-            ObjectAnimator leftOa = LauncherAnimUtils.ofFloat(mLeftHandle, "alpha", 1.0f);
-            ObjectAnimator rightOa = LauncherAnimUtils.ofFloat(mRightHandle, "alpha", 1.0f);
-            ObjectAnimator topOa = LauncherAnimUtils.ofFloat(mTopHandle, "alpha", 1.0f);
-            ObjectAnimator bottomOa = LauncherAnimUtils.ofFloat(mBottomHandle, "alpha", 1.0f);
+            ObjectAnimator leftOa = LauncherAnimUtils.ofFloat(mLeftHandle, ALPHA, 1.0f);
+            ObjectAnimator rightOa = LauncherAnimUtils.ofFloat(mRightHandle, ALPHA, 1.0f);
+            ObjectAnimator topOa = LauncherAnimUtils.ofFloat(mTopHandle, ALPHA, 1.0f);
+            ObjectAnimator bottomOa = LauncherAnimUtils.ofFloat(mBottomHandle, ALPHA, 1.0f);
             oa.addUpdateListener(new AnimatorUpdateListener() {
                 public void onAnimationUpdate(ValueAnimator animation) {
                     requestLayout();
diff --git a/src/com/android/launcher3/BaseContainerView.java b/src/com/android/launcher3/BaseContainerView.java
index c118240..e0946ea 100644
--- a/src/com/android/launcher3/BaseContainerView.java
+++ b/src/com/android/launcher3/BaseContainerView.java
@@ -22,6 +22,8 @@
 import android.util.Log;
 import android.widget.LinearLayout;
 
+import com.android.launcher3.config.ProviderConfig;
+
 /**
  * A base container view, which supports resizing.
  */
@@ -71,7 +73,7 @@
      * Sets the search bar bounds for this container view to match.
      */
     final public void setSearchBarBounds(Rect bounds) {
-        if (LauncherAppState.isDogfoodBuild() && !isValidSearchBarBounds(bounds)) {
+        if (ProviderConfig.IS_DOGFOOD_BUILD && !isValidSearchBarBounds(bounds)) {
             Log.e(TAG, "Invalid search bar bounds: " + bounds);
         }
 
diff --git a/src/com/android/launcher3/BuildInfo.java b/src/com/android/launcher3/BuildInfo.java
index b49ee0d..1392d7a 100644
--- a/src/com/android/launcher3/BuildInfo.java
+++ b/src/com/android/launcher3/BuildInfo.java
@@ -1,32 +1,9 @@
 package com.android.launcher3;
 
-import android.text.TextUtils;
-import android.util.Log;
-
+// TODO: Remove this class once all its references are gone.
 public class BuildInfo {
-    private static final boolean DBG = false;
-    private static final String TAG = "BuildInfo";
 
     public boolean isDogfoodBuild() {
         return false;
     }
-
-    public static BuildInfo loadByName(String className) {
-        if (TextUtils.isEmpty(className)) return new BuildInfo();
-
-        if (DBG) Log.d(TAG, "Loading BuildInfo: " + className);
-        try {
-            Class<?> cls = Class.forName(className);
-            return (BuildInfo) cls.newInstance();
-        } catch (ClassNotFoundException e) {
-            Log.e(TAG, "Bad BuildInfo class", e);
-        } catch (InstantiationException e) {
-            Log.e(TAG, "Bad BuildInfo class", e);
-        } catch (IllegalAccessException e) {
-            Log.e(TAG, "Bad BuildInfo class", e);
-        } catch (ClassCastException e) {
-            Log.e(TAG, "Bad BuildInfo class", e);
-        }
-        return new BuildInfo();
-    }
 }
diff --git a/src/com/android/launcher3/ButtonDropTarget.java b/src/com/android/launcher3/ButtonDropTarget.java
index b7f89d0..574f229 100644
--- a/src/com/android/launcher3/ButtonDropTarget.java
+++ b/src/com/android/launcher3/ButtonDropTarget.java
@@ -24,7 +24,6 @@
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.res.ColorStateList;
-import android.content.res.Configuration;
 import android.graphics.ColorMatrix;
 import android.graphics.ColorMatrixColorFilter;
 import android.graphics.PointF;
@@ -185,8 +184,8 @@
         }
     }
 
-	@Override
-    public final void onDragStart(DragSource source, Object info, int dragAction) {
+    @Override
+    public final void onDragStart(DragSource source, ItemInfo info, int dragAction) {
         mActive = supportsDrop(source, info);
         mDrawable.setColorFilter(null);
         if (mCurrentColorAnim != null) {
@@ -202,7 +201,7 @@
         return supportsDrop(dragObject.dragSource, dragObject.dragInfo);
     }
 
-    protected abstract boolean supportsDrop(DragSource source, Object info);
+    protected abstract boolean supportsDrop(DragSource source, ItemInfo info);
 
     @Override
     public boolean isDropEnabled() {
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index 84e2d49..98258d9 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -18,7 +18,6 @@
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
-import android.animation.AnimatorSet;
 import android.animation.TimeInterpolator;
 import android.animation.ValueAnimator;
 import android.animation.ValueAnimator.AnimatorUpdateListener;
@@ -50,9 +49,11 @@
 
 import com.android.launcher3.BubbleTextView.BubbleTextShadowHandler;
 import com.android.launcher3.FolderIcon.FolderRingAnimator;
+import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.accessibility.DragAndDropAccessibilityDelegate;
 import com.android.launcher3.accessibility.FolderAccessibilityHelper;
 import com.android.launcher3.accessibility.WorkspaceAccessibilityHelper;
+import com.android.launcher3.config.ProviderConfig;
 import com.android.launcher3.util.Thunk;
 
 import java.util.ArrayList;
@@ -567,7 +568,7 @@
         try {
             dispatchRestoreInstanceState(states);
         } catch (IllegalArgumentException ex) {
-            if (LauncherAppState.isDogfoodBuild()) {
+            if (ProviderConfig.IS_DOGFOOD_BUILD) {
                 throw ex;
             }
             // Mismatched viewId / viewType preventing restore. Skip restore on production builds.
@@ -1094,23 +1095,6 @@
      *
      * @param pixelX The X location at which you want to search for a vacant area.
      * @param pixelY The Y location at which you want to search for a vacant area.
-     * @param spanX Horizontal span of the object.
-     * @param spanY Vertical span of the object.
-     * @param result Array in which to place the result, or null (in which case a new array will
-     *        be allocated)
-     * @return The X, Y cell of a vacant area that can contain this object,
-     *         nearest the requested location.
-     */
-    int[] findNearestVacantArea(int pixelX, int pixelY, int spanX, int spanY, int[] result) {
-        return findNearestVacantArea(pixelX, pixelY, spanX, spanY, spanX, spanY, result, null);
-    }
-
-    /**
-     * Find a vacant area that will fit the given bounds nearest the requested
-     * cell location. Uses Euclidean distance to score multiple vacant areas.
-     *
-     * @param pixelX The X location at which you want to search for a vacant area.
-     * @param pixelY The Y location at which you want to search for a vacant area.
      * @param minSpanX The minimum horizontal span required
      * @param minSpanY The minimum vertical span required
      * @param spanX Horizontal span of the object.
@@ -2175,17 +2159,14 @@
                 a.cancel();
             }
 
-            AnimatorSet s = LauncherAnimUtils.createAnimatorSet();
-            a = s;
-            s.playTogether(
-                LauncherAnimUtils.ofFloat(child, "scaleX", getChildrenScale()),
-                LauncherAnimUtils.ofFloat(child, "scaleY", getChildrenScale()),
-                LauncherAnimUtils.ofFloat(child, "translationX", 0f),
-                LauncherAnimUtils.ofFloat(child, "translationY", 0f)
-            );
-            s.setDuration(REORDER_ANIMATION_DURATION);
-            s.setInterpolator(new android.view.animation.DecelerateInterpolator(1.5f));
-            s.start();
+            a = new LauncherViewPropertyAnimator(child)
+                .scaleX(getChildrenScale())
+                .scaleY(getChildrenScale())
+                .translationX(0)
+                .translationY(0)
+                .setDuration(REORDER_ANIMATION_DURATION);
+            a.setInterpolator(new android.view.animation.DecelerateInterpolator(1.5f));
+            a.start();
         }
     }
 
@@ -2202,6 +2183,15 @@
                 mOccupied[i][j] = mTmpOccupied[i][j];
             }
         }
+
+        long screenId = mLauncher.getWorkspace().getIdForScreen(this);
+        int container = Favorites.CONTAINER_DESKTOP;
+
+        if (mLauncher.isHotseatLayout(this)) {
+            screenId = -1;
+            container = Favorites.CONTAINER_HOTSEAT;
+        }
+
         int childCount = mShortcutsAndWidgets.getChildCount();
         for (int i = 0; i < childCount; i++) {
             View child = mShortcutsAndWidgets.getChildAt(i);
@@ -2210,17 +2200,21 @@
             // We do a null check here because the item info can be null in the case of the
             // AllApps button in the hotseat.
             if (info != null) {
-                if (info.cellX != lp.tmpCellX || info.cellY != lp.tmpCellY ||
-                        info.spanX != lp.cellHSpan || info.spanY != lp.cellVSpan) {
-                    info.requiresDbUpdate = true;
-                }
+                final boolean requiresDbUpdate = (info.cellX != lp.tmpCellX
+                        || info.cellY != lp.tmpCellY || info.spanX != lp.cellHSpan
+                        || info.spanY != lp.cellVSpan);
+
                 info.cellX = lp.cellX = lp.tmpCellX;
                 info.cellY = lp.cellY = lp.tmpCellY;
                 info.spanX = lp.cellHSpan;
                 info.spanY = lp.cellVSpan;
+
+                if (requiresDbUpdate) {
+                    LauncherModel.modifyItemInDatabase(mLauncher, info, container, screenId,
+                            info.cellX, info.cellY, info.spanX, info.spanY);
+                }
             }
         }
-        mLauncher.getWorkspace().updateItemLocationsInDatabase(this);
     }
 
     private void setUseTempCoords(boolean useTempCoords) {
diff --git a/src/com/android/launcher3/DeleteDropTarget.java b/src/com/android/launcher3/DeleteDropTarget.java
index 9c8659c..ae6e3ba 100644
--- a/src/com/android/launcher3/DeleteDropTarget.java
+++ b/src/com/android/launcher3/DeleteDropTarget.java
@@ -46,20 +46,20 @@
         setDrawable(R.drawable.ic_remove_launcher);
     }
 
-    public static boolean supportsDrop(Object info) {
+    public static boolean supportsDrop(ItemInfo info) {
         return (info instanceof ShortcutInfo)
                 || (info instanceof LauncherAppWidgetInfo)
                 || (info instanceof FolderInfo);
     }
 
     @Override
-    protected boolean supportsDrop(DragSource source, Object info) {
+    protected boolean supportsDrop(DragSource source, ItemInfo info) {
         return source.supportsDeleteDropTarget() && supportsDrop(info);
     }
 
     @Override
     @Thunk void completeDrop(DragObject d) {
-        ItemInfo item = (ItemInfo) d.dragInfo;
+        ItemInfo item = d.dragInfo;
         if ((d.dragSource instanceof Workspace) || (d.dragSource instanceof Folder)) {
             removeWorkspaceOrFolderItem(mLauncher, item, null);
         }
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 774594f..9b4642d 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -339,13 +339,13 @@
     }
 
     // The rect returned will be extended to below the system ui that covers the workspace
-    Rect getHotseatRect() {
+    public boolean isInHotseatRect(int x, int y) {
         if (isVerticalBarLayout()) {
-            return new Rect(availableWidthPx - hotseatBarHeightPx, 0,
-                    Integer.MAX_VALUE, availableHeightPx);
+            return (x >= (availableWidthPx - hotseatBarHeightPx))
+                    && (y >= 0) && (y <= availableHeightPx);
         } else {
-            return new Rect(0, availableHeightPx - hotseatBarHeightPx,
-                    availableWidthPx, Integer.MAX_VALUE);
+            return (x >= 0) && (x <= availableWidthPx)
+                    && (y >= (availableHeightPx - hotseatBarHeightPx));
         }
     }
 
diff --git a/src/com/android/launcher3/DragController.java b/src/com/android/launcher3/DragController.java
index 2191455..1373bf2 100644
--- a/src/com/android/launcher3/DragController.java
+++ b/src/com/android/launcher3/DragController.java
@@ -26,6 +26,7 @@
 import android.os.Handler;
 import android.os.IBinder;
 import android.util.Log;
+import android.view.DragEvent;
 import android.view.HapticFeedbackConstants;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
@@ -42,7 +43,7 @@
 /**
  * Class for initiating a drag within a view or across multiple views.
  */
-public class DragController {
+public class DragController implements DragDriver.EventListener {
     private static final String TAG = "Launcher.DragController";
 
     /** Indicates the drag is a move.  */
@@ -73,8 +74,10 @@
     private final int[] mCoordinatesTemp = new int[2];
     private final boolean mIsRtl;
 
-    /** Whether or not we're dragging. */
-    private boolean mDragging;
+    /**
+     * Drag driver for the current drag/drop operation, or null if there is no active DND operation.
+     */
+    private DragDriver mDragDriver = null;
 
     /** Whether or not this is an accessible drag operation */
     private boolean mIsAccessibleDrag;
@@ -88,7 +91,7 @@
     /** the area at the edge of the screen that makes the workspace go left
      *   or right while you're dragging.
      */
-    private int mScrollZone;
+    private final int mScrollZone;
 
     private DropTarget.DragObject mDragObject;
 
@@ -120,7 +123,7 @@
     private int mTmpPoint[] = new int[2];
     private Rect mDragLayerRect = new Rect();
 
-    protected int mFlingToDeleteThresholdVelocity;
+    protected final int mFlingToDeleteThresholdVelocity;
     private VelocityTracker mVelocityTracker;
 
     /**
@@ -135,14 +138,14 @@
          * @param dragAction The drag action: either {@link DragController#DRAG_ACTION_MOVE}
          *        or {@link DragController#DRAG_ACTION_COPY}
          */
-        void onDragStart(DragSource source, Object info, int dragAction);
+        void onDragStart(DragSource source, ItemInfo info, int dragAction);
 
         /**
          * The drag has ended
          */
         void onDragEnd();
     }
-    
+
     /**
      * Used to create a new DragLayer from XML.
      *
@@ -161,10 +164,6 @@
         mIsRtl = Utilities.isRtl(r);
     }
 
-    public boolean dragging() {
-        return mDragging;
-    }
-
     /**
      * Starts a drag.
      *
@@ -178,7 +177,7 @@
      * @param dragRegion Coordinates within the bitmap b for the position of item being dragged.
      *          Makes dragging feel more precise, e.g. you can clip out a transparent border
      */
-    public void startDrag(View v, Bitmap bmp, DragSource source, Object dragInfo,
+    public void startDrag(View v, Bitmap bmp, DragSource source, ItemInfo dragInfo,
             Rect viewImageBounds, int dragAction, float initialDragViewScale) {
         int[] loc = mCoordinatesTemp;
         mLauncher.getDragLayer().getLocationInDragLayer(v, loc);
@@ -211,7 +210,7 @@
      * @param accessible whether this drag should occur in accessibility mode
      */
     public DragView startDrag(Bitmap b, int dragLayerX, int dragLayerY,
-            DragSource source, Object dragInfo, int dragAction, Point dragOffset, Rect dragRegion,
+            DragSource source, ItemInfo dragInfo, int dragAction, Point dragOffset, Rect dragRegion,
             float initialDragViewScale, boolean accessible) {
         if (PROFILE_DRAWING_DURING_DRAG) {
             android.os.Debug.startMethodTracing("Launcher");
@@ -234,8 +233,8 @@
         final int dragRegionLeft = dragRegion == null ? 0 : dragRegion.left;
         final int dragRegionTop = dragRegion == null ? 0 : dragRegion.top;
 
-        mDragging = true;
         mIsAccessibleDrag = accessible;
+        mLastDropTarget = null;
 
         mDragObject = new DropTarget.DragObject();
 
@@ -256,6 +255,8 @@
         final DragView dragView = mDragObject.dragView = new DragView(mLauncher, b, registrationX,
                 registrationY, 0, 0, b.getWidth(), b.getHeight(), initialDragViewScale);
 
+        mDragDriver = DragDriver.create(this, dragInfo, dragView);
+
         if (dragOffset != null) {
             dragView.setDragVisualizeOffset(new Point(dragOffset));
         }
@@ -318,18 +319,18 @@
      * </pre>
      */
     public boolean dispatchKeyEvent(KeyEvent event) {
-        return mDragging;
+        return mDragDriver != null;
     }
 
     public boolean isDragging() {
-        return mDragging;
+        return mDragDriver != null;
     }
 
     /**
      * Stop dragging without dropping.
      */
     public void cancelDrag() {
-        if (mDragging) {
+        if (mDragDriver != null) {
             if (mLastDropTarget != null) {
                 mLastDropTarget.onDragExit(mDragObject);
             }
@@ -340,6 +341,7 @@
         }
         endDrag();
     }
+
     public void onAppsRemoved(final ArrayList<String> packageNames, HashSet<ComponentName> cns) {
         // Cancel the current drag if we are removing an app that we are dragging
         if (mDragObject != null) {
@@ -363,8 +365,8 @@
     }
 
     private void endDrag() {
-        if (mDragging) {
-            mDragging = false;
+        if (mDragDriver != null) {
+            mDragDriver = null;
             mIsAccessibleDrag = false;
             clearScrollRunnable();
             boolean isDeferred = false;
@@ -416,7 +418,7 @@
     }
 
     long getLastGestureUpTime() {
-        if (mDragging) {
+        if (mDragDriver != null) {
             return System.currentTimeMillis();
         } else {
             return mLastTouchUpTime;
@@ -427,6 +429,54 @@
         mLastTouchUpTime = -1;
     }
 
+    @Override
+    public void onDriverDragMove(float x, float y) {
+        final int[] dragLayerPos = getClampedDragLayerPos(x, y);
+
+        handleMoveEvent(dragLayerPos[0], dragLayerPos[1]);
+    }
+
+    @Override
+    public void onDriverDragExitWindow() {
+        if (mLastDropTarget != null) {
+            mLastDropTarget.onDragExit(mDragObject);
+            mLastDropTarget = null;
+        }
+    }
+
+    @Override
+    public void onDriverDragEnd(float x, float y, DropTarget dropTargetOverride) {
+        final int[] dragLayerPos = getClampedDragLayerPos(x, y);
+        final int dragLayerX = dragLayerPos[0];
+        final int dragLayerY = dragLayerPos[1];
+
+        DropTarget dropTarget;
+        PointF vec = null;
+
+        if (dropTargetOverride != null) {
+            dropTarget = dropTargetOverride;
+        } else {
+            vec = isFlingingToDelete(mDragObject.dragSource);
+            if (!DeleteDropTarget.supportsDrop(mDragObject.dragInfo)) {
+                vec = null;
+            }
+            if (vec != null) {
+                dropTarget = mFlingToDeleteDropTarget;
+            } else {
+                dropTarget = findDropTarget((int) x, (int) y, mCoordinatesTemp);
+            }
+        }
+
+        drop(dropTarget, x, y, vec);
+
+        endDrag();
+    }
+
+    @Override
+    public void onDriverDragCancel() {
+        cancelDrag();
+    }
+
     /**
      * Call this from a drag source view.
      */
@@ -434,8 +484,8 @@
         @SuppressWarnings("all") // suppress dead code warning
         final boolean debug = false;
         if (debug) {
-            Log.d(Launcher.TAG, "DragController.onInterceptTouchEvent " + ev + " mDragging="
-                    + mDragging);
+            Log.d(Launcher.TAG, "DragController.onInterceptTouchEvent " + ev + " Dragging="
+                    + (mDragDriver != null));
         }
 
         if (mIsAccessibleDrag) {
@@ -451,35 +501,33 @@
         final int dragLayerY = dragLayerPos[1];
 
         switch (action) {
-            case MotionEvent.ACTION_MOVE:
-                break;
             case MotionEvent.ACTION_DOWN:
                 // Remember location of down touch
                 mMotionDownX = dragLayerX;
                 mMotionDownY = dragLayerY;
-                mLastDropTarget = null;
                 break;
             case MotionEvent.ACTION_UP:
                 mLastTouchUpTime = System.currentTimeMillis();
-                if (mDragging) {
-                    PointF vec = isFlingingToDelete(mDragObject.dragSource);
-                    if (!DeleteDropTarget.supportsDrop(mDragObject.dragInfo)) {
-                        vec = null;
-                    }
-                    if (vec != null) {
-                        dropOnFlingToDeleteTarget(dragLayerX, dragLayerY, vec);
-                    } else {
-                        drop(dragLayerX, dragLayerY);
-                    }
-                }
-                endDrag();
-                break;
-            case MotionEvent.ACTION_CANCEL:
-                cancelDrag();
                 break;
         }
 
-        return mDragging;
+        return mDragDriver != null && mDragDriver.onInterceptTouchEvent(ev);
+    }
+
+    /**
+     * Call this from a drag source view.
+     */
+    public boolean onDragEvent(DragEvent event) {
+        return mDragDriver != null && mDragDriver.onDragEvent(event);
+    }
+
+    /**
+     * Call this from a drag view.
+     */
+    public void onDragViewAnimationEnd() {
+        if (mDragDriver != null ) {
+            mDragDriver.onDragViewAnimationEnd();
+        }
     }
 
     /**
@@ -579,7 +627,7 @@
      * Call this from a drag source view.
      */
     public boolean onTouchEvent(MotionEvent ev) {
-        if (!mDragging || mIsAccessibleDrag) {
+        if (mDragDriver == null || mIsAccessibleDrag) {
             return false;
         }
 
@@ -592,47 +640,25 @@
         final int dragLayerY = dragLayerPos[1];
 
         switch (action) {
-        case MotionEvent.ACTION_DOWN:
-            // Remember where the motion event started
-            mMotionDownX = dragLayerX;
-            mMotionDownY = dragLayerY;
+            case MotionEvent.ACTION_DOWN:
+                // Remember where the motion event started
+                mMotionDownX = dragLayerX;
+                mMotionDownY = dragLayerY;
 
-            if ((dragLayerX < mScrollZone) || (dragLayerX > mScrollView.getWidth() - mScrollZone)) {
-                mScrollState = SCROLL_WAITING_IN_ZONE;
-                mHandler.postDelayed(mScrollRunnable, SCROLL_DELAY);
-            } else {
-                mScrollState = SCROLL_OUTSIDE_ZONE;
-            }
-            handleMoveEvent(dragLayerX, dragLayerY);
-            break;
-        case MotionEvent.ACTION_MOVE:
-            handleMoveEvent(dragLayerX, dragLayerY);
-            break;
-        case MotionEvent.ACTION_UP:
-            // Ensure that we've processed a move event at the current pointer location.
-            handleMoveEvent(dragLayerX, dragLayerY);
-            mHandler.removeCallbacks(mScrollRunnable);
-
-            if (mDragging) {
-                PointF vec = isFlingingToDelete(mDragObject.dragSource);
-                if (!DeleteDropTarget.supportsDrop(mDragObject.dragInfo)) {
-                    vec = null;
-                }
-                if (vec != null) {
-                    dropOnFlingToDeleteTarget(dragLayerX, dragLayerY, vec);
+                if ((dragLayerX < mScrollZone) || (dragLayerX > mScrollView.getWidth() - mScrollZone)) {
+                    mScrollState = SCROLL_WAITING_IN_ZONE;
+                    mHandler.postDelayed(mScrollRunnable, SCROLL_DELAY);
                 } else {
-                    drop(dragLayerX, dragLayerY);
+                    mScrollState = SCROLL_OUTSIDE_ZONE;
                 }
-            }
-            endDrag();
-            break;
-        case MotionEvent.ACTION_CANCEL:
-            mHandler.removeCallbacks(mScrollRunnable);
-            cancelDrag();
-            break;
+                break;
+            case MotionEvent.ACTION_UP:
+            case MotionEvent.ACTION_CANCEL:
+                mHandler.removeCallbacks(mScrollRunnable);
+                break;
         }
 
-        return true;
+        return mDragDriver.onTouchEvent(ev);
     }
 
     /**
@@ -642,7 +668,6 @@
     public void prepareAccessibleDrag(int x, int y) {
         mMotionDownX = x;
         mMotionDownY = y;
-        mLastDropTarget = null;
     }
 
     /**
@@ -660,7 +685,7 @@
 
         dropTarget.prepareAccessibilityDrop();
         // Perform the drop
-        drop(location[0], location[1]);
+        drop(dropTarget, location[0], location[1], null);
         endDrag();
     }
 
@@ -690,49 +715,41 @@
         return null;
     }
 
-    private void dropOnFlingToDeleteTarget(float x, float y, PointF vel) {
+    void drop(DropTarget dropTarget, float x, float y, PointF flingVel) {
         final int[] coordinates = mCoordinatesTemp;
 
         mDragObject.x = coordinates[0];
         mDragObject.y = coordinates[1];
 
-        // Clean up dragging on the target if it's not the current fling delete target otherwise,
-        // start dragging to it.
-        if (mLastDropTarget != null && mFlingToDeleteDropTarget != mLastDropTarget) {
-            mLastDropTarget.onDragExit(mDragObject);
+        // Move dragging to the final target.
+        if (dropTarget != mLastDropTarget) {
+            if (mLastDropTarget != null) {
+                mLastDropTarget.onDragExit(mDragObject);
+            }
+            mLastDropTarget = dropTarget;
+            if (dropTarget != null) {
+                dropTarget.onDragEnter(mDragObject);
+            }
         }
 
-        // Drop onto the fling-to-delete target
-        boolean accepted = false;
-        mFlingToDeleteDropTarget.onDragEnter(mDragObject);
-        // We must set dragComplete to true _only_ after we "enter" the fling-to-delete target for
-        // "drop"
         mDragObject.dragComplete = true;
-        mFlingToDeleteDropTarget.onDragExit(mDragObject);
-        if (mFlingToDeleteDropTarget.acceptDrop(mDragObject)) {
-            mFlingToDeleteDropTarget.onFlingToDelete(mDragObject, vel);
-            accepted = true;
-        }
-        mDragObject.dragSource.onDropCompleted((View) mFlingToDeleteDropTarget, mDragObject, true,
-                accepted);
-    }
 
-    private void drop(float x, float y) {
-        final int[] coordinates = mCoordinatesTemp;
-        final DropTarget dropTarget = findDropTarget((int) x, (int) y, coordinates);
-
-        mDragObject.x = coordinates[0];
-        mDragObject.y = coordinates[1];
+        // Drop onto the target.
         boolean accepted = false;
         if (dropTarget != null) {
-            mDragObject.dragComplete = true;
             dropTarget.onDragExit(mDragObject);
             if (dropTarget.acceptDrop(mDragObject)) {
-                dropTarget.onDrop(mDragObject);
+                if (flingVel != null) {
+                    dropTarget.onFlingToDelete(mDragObject, flingVel);
+                } else {
+                    dropTarget.onDrop(mDragObject);
+                }
                 accepted = true;
             }
         }
-        mDragObject.dragSource.onDropCompleted((View) dropTarget, mDragObject, false, accepted);
+        final View dropTargetAsView = dropTarget instanceof View ? (View) dropTarget : null;
+        mDragObject.dragSource.onDropCompleted(
+                dropTargetAsView, mDragObject, flingVel != null, accepted);
     }
 
     private DropTarget findDropTarget(int x, int y, int[] dropCoordinates) {
diff --git a/src/com/android/launcher3/DragDriver.java b/src/com/android/launcher3/DragDriver.java
new file mode 100644
index 0000000..9ee4b3d
--- /dev/null
+++ b/src/com/android/launcher3/DragDriver.java
@@ -0,0 +1,242 @@
+/*
+ * Copyright (C) 2015 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.ClipData;
+import android.content.Intent;
+import android.graphics.Canvas;
+import android.graphics.Point;
+import android.view.DragEvent;
+import android.view.MotionEvent;
+import android.view.View;
+
+/**
+ * Base class for driving a drag/drop operation.
+ */
+public abstract class DragDriver {
+    protected final EventListener mEventListener;
+
+    public interface EventListener {
+        void onDriverDragMove(float x, float y);
+        void onDriverDragExitWindow();
+        void onDriverDragEnd(float x, float y, DropTarget dropTargetOverride);
+        void onDriverDragCancel();
+    }
+
+    public DragDriver(EventListener eventListener) {
+        mEventListener = eventListener;
+    }
+
+    /**
+     * Handles ending of the DragView animation.
+     */
+    public abstract void onDragViewAnimationEnd();
+
+    public abstract boolean onTouchEvent(MotionEvent ev);
+
+    public abstract boolean onDragEvent (DragEvent event);
+
+    public abstract boolean onInterceptTouchEvent(MotionEvent ev);
+
+    public static DragDriver create(
+            DragController dragController, ItemInfo dragInfo, DragView dragView) {
+        if (Utilities.isNycOrAbove()) {
+            return new SystemDragDriver(dragController, dragInfo.getIntent(), dragView);
+        } else {
+            return new InternalDragDriver(dragController);
+        }
+    }
+
+};
+
+/**
+ * Class for driving a system (i.e. framework) drag/drop operation.
+ */
+class SystemDragDriver extends DragDriver {
+    /** Intent associated with the drag operation, or null is there no associated intent.  */
+    private final Intent mDragIntent;
+
+    private final DragView mDragView;
+    boolean mDragging = false;
+    boolean mReceivedDropEvent = false;
+    float mLastX = 0;
+    float mLastY = 0;
+
+    public SystemDragDriver(DragController dragController, Intent dragIntent, DragView dragView) {
+        super(dragController);
+        mDragIntent = dragIntent;
+        mDragView = dragView;
+    }
+
+    private static class ShadowBuilder extends View.DragShadowBuilder {
+        final DragView mDragView;
+
+        public ShadowBuilder(DragView dragView) {
+            mDragView = dragView;
+        }
+
+        @Override
+        public void onProvideShadowMetrics (Point size, Point touch) {
+            mDragView.provideDragShadowMetrics(size, touch);
+        }
+
+        @Override
+        public void onDrawShadow(Canvas canvas) {
+            mDragView.drawDragShadow(canvas);
+        }
+    };
+
+    @Override
+    public void onDragViewAnimationEnd() {
+        // Clip data for the drag operation. If there is an intent, create an intent-based ClipData,
+        // which will be passed to a global DND.
+        // If there is no intent, craft a fake ClipData and start a local DND operation; this
+        // ClipData will be ignored.
+        final ClipData dragData = mDragIntent != null ?
+                ClipData.newIntent("", mDragIntent) :
+                ClipData.newPlainText("", "");
+
+        View.DragShadowBuilder shadowBuilder = new ShadowBuilder(mDragView);
+        // TODO: DND flags are in flux, once settled, use the appropriate constant.
+        final int flagGlobal = 1 << 0;
+        final int flagOpaque = 1 << 9;
+        final int flags = (mDragIntent != null ? flagGlobal : 0) | flagOpaque;
+
+        mDragging = true;
+
+        if (!mDragView.startDrag(dragData, shadowBuilder, null, flags)) {
+            mDragging = false;
+            mEventListener.onDriverDragCancel();
+            return;
+        }
+
+        // Starting from this point, the driver takes over showing the drag shadow, so hiding the
+        // drag view.
+        mDragView.setVisibility(View.INVISIBLE);
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent ev) {
+        return false;
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent ev) {
+        return false;
+    }
+
+    @Override
+    public boolean onDragEvent (DragEvent event) {
+        if (!mDragging) {
+            // We are interested only in drag events started by this driver.
+            return false;
+        }
+
+        final int action = event.getAction();
+
+        switch (action) {
+            case DragEvent.ACTION_DRAG_STARTED:
+                return true;
+
+            case DragEvent.ACTION_DRAG_ENTERED:
+                return true;
+
+            case DragEvent.ACTION_DRAG_LOCATION:
+                mLastX = event.getX();
+                mLastY = event.getY();
+                mEventListener.onDriverDragMove(event.getX(), event.getY());
+                return true;
+
+            case DragEvent.ACTION_DROP:
+                mReceivedDropEvent = true;
+                return true;
+
+            case DragEvent.ACTION_DRAG_EXITED:
+                mEventListener.onDriverDragExitWindow();
+                return true;
+
+            case DragEvent.ACTION_DRAG_ENDED:
+                final boolean dragAccepted = event.getResult();
+                final boolean acceptedByAnotherWindow = dragAccepted && !mReceivedDropEvent;
+
+                // When the system drag ends, its drag shadow disappears. Resume showing the drag
+                // view for the possible final animation.
+                mDragView.setVisibility(View.VISIBLE);
+
+                final DropTarget dropTargetOverride = acceptedByAnotherWindow ?
+                        new AnotherWindowDropTarget(mDragView.getContext()) : null;
+
+                mEventListener.onDriverDragEnd(mLastX, mLastY, dropTargetOverride);
+                mDragging = false;
+                return true;
+
+            default:
+                return false;
+        }
+    }
+};
+
+/**
+ * Class for driving an internal (i.e. not using framework) drag/drop operation.
+ */
+class InternalDragDriver extends DragDriver {
+    public InternalDragDriver(DragController dragController) {
+        super(dragController);
+    }
+
+    @Override
+    public void onDragViewAnimationEnd() {}
+
+    @Override
+    public boolean onTouchEvent(MotionEvent ev) {
+        final int action = ev.getAction();
+
+        switch (action) {
+            case MotionEvent.ACTION_MOVE:
+                mEventListener.onDriverDragMove(ev.getX(), ev.getY());
+                break;
+            case MotionEvent.ACTION_UP:
+                mEventListener.onDriverDragMove(ev.getX(), ev.getY());
+                mEventListener.onDriverDragEnd(ev.getX(), ev.getY(), null);
+                break;
+            case MotionEvent.ACTION_CANCEL:
+                mEventListener.onDriverDragCancel();
+                break;
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent ev) {
+        final int action = ev.getAction();
+
+        switch (action) {
+            case MotionEvent.ACTION_UP:
+                mEventListener.onDriverDragEnd(ev.getX(), ev.getY(), null);
+                break;
+            case MotionEvent.ACTION_CANCEL:
+                mEventListener.onDriverDragCancel();
+                break;
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean onDragEvent (DragEvent event) { return false; }
+};
diff --git a/src/com/android/launcher3/DragLayer.java b/src/com/android/launcher3/DragLayer.java
index 1c18747..f523c49 100644
--- a/src/com/android/launcher3/DragLayer.java
+++ b/src/com/android/launcher3/DragLayer.java
@@ -28,6 +28,7 @@
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.util.AttributeSet;
+import android.view.DragEvent;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.View;
@@ -375,6 +376,11 @@
         return mDragController.onTouchEvent(ev);
     }
 
+    @Override
+    public boolean onDragEvent (DragEvent event) {
+        return mDragController.onDragEvent(event);
+    }
+
     /**
      * Determine the rect of the descendant in this DragLayer's coordinates
      *
@@ -764,7 +770,7 @@
         // Show the drop view if it was previously hidden
         mDropView = view;
         mDropView.cancelAnimation();
-        mDropView.resetLayoutParams();
+        mDropView.requestLayout();
 
         // Set the anchor view if the page is scrolling
         if (anchorView != null) {
diff --git a/src/com/android/launcher3/DragView.java b/src/com/android/launcher3/DragView.java
index dfa8202..8957735 100644
--- a/src/com/android/launcher3/DragView.java
+++ b/src/com/android/launcher3/DragView.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3;
 
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
 import android.animation.FloatArrayEvaluator;
 import android.animation.ValueAnimator;
 import android.animation.ValueAnimator.AnimatorUpdateListener;
@@ -45,18 +47,17 @@
     private Bitmap mBitmap;
     private Bitmap mCrossFadeBitmap;
     @Thunk Paint mPaint;
-    private int mRegistrationX;
-    private int mRegistrationY;
+    private final int mRegistrationX;
+    private final int mRegistrationY;
 
     private Point mDragVisualizeOffset = null;
     private Rect mDragRegion = null;
-    private DragLayer mDragLayer = null;
+    private final DragLayer mDragLayer;
+    private final DragController mDragController;
     private boolean mHasDrawn = false;
     @Thunk float mCrossFadeProgress = 0f;
 
     ValueAnimator mAnim;
-    @Thunk float mOffsetX = 0.0f;
-    @Thunk float mOffsetY = 0.0f;
     private float mInitialScale = 1f;
     // The intrinsic icon scale factor is the scale factor for a drag icon over the workspace
     // size.  This is ignored for non-icons.
@@ -81,6 +82,7 @@
             int left, int top, int width, int height, final float initialScale) {
         super(launcher);
         mDragLayer = launcher.getDragLayer();
+        mDragController = launcher.getDragController();
         mInitialScale = initialScale;
 
         final Resources res = getResources();
@@ -99,11 +101,6 @@
             public void onAnimationUpdate(ValueAnimator animation) {
                 final float value = (Float) animation.getAnimatedValue();
 
-                final int deltaX = (int) (-mOffsetX);
-                final int deltaY = (int) (-mOffsetY);
-
-                mOffsetX += deltaX;
-                mOffsetY += deltaY;
                 setScaleX(initialScale + (value * (scale - initialScale)));
                 setScaleY(initialScale + (value * (scale - initialScale)));
                 if (sDragAlpha != 1f) {
@@ -112,13 +109,17 @@
 
                 if (getParent() == null) {
                     animation.cancel();
-                } else {
-                    setTranslationX(getTranslationX() + deltaX);
-                    setTranslationY(getTranslationY() + deltaY);
                 }
             }
         });
 
+        mAnim.addListener(new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationEnd(Animator animation) {
+                mDragController.onDragViewAnimationEnd();
+            }
+        });
+
         mBitmap = Bitmap.createBitmap(bitmap, left, top, width, height);
         setDragRegion(new Rect(0, 0, width, height));
 
@@ -145,10 +146,6 @@
         return mIntrinsicIconScale;
     }
 
-    public float getOffsetY() {
-        return mOffsetY;
-    }
-
     public int getDragRegionLeft() {
         return mDragRegion.left;
     }
@@ -181,10 +178,6 @@
         return mDragRegion;
     }
 
-    public float getInitialScale() {
-        return mInitialScale;
-    }
-
     public void updateInitialScaleToCurrentScale() {
         mInitialScale = getScaleX();
     }
@@ -194,17 +187,27 @@
         setMeasuredDimension(mBitmap.getWidth(), mBitmap.getHeight());
     }
 
+    // Draws drag shadow for system DND.
+    public void drawDragShadow(Canvas canvas) {
+        final int saveCount = canvas.save(Canvas.MATRIX_SAVE_FLAG);
+        canvas.scale(getScaleX(), getScaleY());
+        onDraw(canvas);
+        canvas.restoreToCount(saveCount);
+    }
+
+    // Provides drag shadow metrics for system DND.
+    public void provideDragShadowMetrics(Point size, Point touch) {
+        size.set((int)(mBitmap.getWidth() * getScaleX()), (int)(mBitmap.getHeight() * getScaleY()));
+
+        final float xGrowth = mBitmap.getWidth() * (getScaleX() - 1);
+        final float yGrowth = mBitmap.getHeight() * (getScaleY() - 1);
+        touch.set(
+                mRegistrationX + (int)Math.round(xGrowth / 2),
+                mRegistrationY + (int)Math.round(yGrowth / 2));
+    }
+
     @Override
     protected void onDraw(Canvas canvas) {
-        @SuppressWarnings("all") // suppress dead code warning
-        final boolean debug = false;
-        if (debug) {
-            Paint p = new Paint();
-            p.setStyle(Paint.Style.FILL);
-            p.setColor(0x66ffffff);
-            canvas.drawRect(0, 0, getWidth(), getHeight(), p);
-        }
-
         mHasDrawn = true;
         boolean crossFade = mCrossFadeProgress > 0 && mCrossFadeBitmap != null;
         if (crossFade) {
@@ -214,12 +217,12 @@
         canvas.drawBitmap(mBitmap, 0.0f, 0.0f, mPaint);
         if (crossFade) {
             mPaint.setAlpha((int) (255 * mCrossFadeProgress));
-            canvas.save();
+            final int saveCount = canvas.save(Canvas.MATRIX_SAVE_FLAG);
             float sX = (mBitmap.getWidth() * 1.0f) / mCrossFadeBitmap.getWidth();
             float sY = (mBitmap.getHeight() * 1.0f) / mCrossFadeBitmap.getHeight();
             canvas.scale(sX, sY);
             canvas.drawBitmap(mCrossFadeBitmap, 0.0f, 0.0f, mPaint);
-            canvas.restore();
+            canvas.restoreToCount(saveCount);
         }
     }
 
@@ -235,6 +238,7 @@
             @Override
             public void onAnimationUpdate(ValueAnimator animation) {
                 mCrossFadeProgress = animation.getAnimatedFraction();
+                invalidate();
             }
         });
         va.start();
@@ -333,11 +337,6 @@
         }
     }
 
-    public void resetLayoutParams() {
-        mOffsetX = mOffsetY = 0;
-        requestLayout();
-    }
-
     /**
      * Move the window containing this view.
      *
@@ -345,8 +344,8 @@
      * @param touchY the y coordinate the user touched in DragLayer coordinates
      */
     void move(int touchX, int touchY) {
-        setTranslationX(touchX - mRegistrationX + (int) mOffsetX);
-        setTranslationY(touchY - mRegistrationY + (int) mOffsetY);
+        setTranslationX(touchX - mRegistrationX);
+        setTranslationY(touchY - mRegistrationY);
     }
 
     void remove() {
diff --git a/src/com/android/launcher3/DropTarget.java b/src/com/android/launcher3/DropTarget.java
index c8fac54..3748464 100644
--- a/src/com/android/launcher3/DropTarget.java
+++ b/src/com/android/launcher3/DropTarget.java
@@ -47,7 +47,7 @@
         public DragView dragView = null;
 
         /** The data associated with the object being dragged */
-        public Object dragInfo = null;
+        public ItemInfo dragInfo = null;
 
         /** Where the drag originated */
         public DragSource dragSource = null;
diff --git a/src/com/android/launcher3/FocusHelper.java b/src/com/android/launcher3/FocusHelper.java
index 57aec32..3751b88 100644
--- a/src/com/android/launcher3/FocusHelper.java
+++ b/src/com/android/launcher3/FocusHelper.java
@@ -22,6 +22,7 @@
 import android.view.View;
 import android.view.ViewGroup;
 
+import com.android.launcher3.config.ProviderConfig;
 import com.android.launcher3.util.FocusLogic;
 import com.android.launcher3.util.Thunk;
 
@@ -74,7 +75,7 @@
 
 
             if (!(v.getParent() instanceof ShortcutAndWidgetContainer)) {
-                if (LauncherAppState.isDogfoodBuild()) {
+                if (ProviderConfig.IS_DOGFOOD_BUILD) {
                     throw new IllegalStateException("Parent of the focused item is not supported.");
                 } else {
                     return false;
diff --git a/src/com/android/launcher3/FocusIndicatorView.java b/src/com/android/launcher3/FocusIndicatorView.java
index ecf93e4..2337f6e 100644
--- a/src/com/android/launcher3/FocusIndicatorView.java
+++ b/src/com/android/launcher3/FocusIndicatorView.java
@@ -16,7 +16,7 @@
 
 package com.android.launcher3;
 
-import android.animation.ObjectAnimator;
+import android.animation.Animator;
 import android.animation.PropertyValuesHolder;
 import android.content.Context;
 import android.graphics.Canvas;
@@ -36,7 +36,7 @@
     private final int[] mIndicatorPos = new int[2];
     private final int[] mTargetViewPos = new int[2];
 
-    private ObjectAnimator mCurrentAnimation;
+    private Animator mCurrentAnimation;
     private ViewAnimState mTargetState;
 
     private View mLastFocusedView;
@@ -98,12 +98,12 @@
 
             if (getAlpha() > MIN_VISIBLE_ALPHA) {
                 mTargetState = nextState;
-                mCurrentAnimation = LauncherAnimUtils.ofPropertyValuesHolder(this,
-                        PropertyValuesHolder.ofFloat(View.ALPHA, 1),
-                        PropertyValuesHolder.ofFloat(View.TRANSLATION_X, mTargetState.x),
-                        PropertyValuesHolder.ofFloat(View.TRANSLATION_Y, mTargetState.y),
-                        PropertyValuesHolder.ofFloat(View.SCALE_X, mTargetState.scaleX),
-                        PropertyValuesHolder.ofFloat(View.SCALE_Y, mTargetState.scaleY));
+                mCurrentAnimation = new LauncherViewPropertyAnimator(this)
+                        .alpha(1)
+                        .translationX(mTargetState.x)
+                        .translationY(mTargetState.y)
+                        .scaleX(mTargetState.scaleX)
+                        .scaleY(mTargetState.scaleY);
             } else {
                 applyState(nextState);
                 mCurrentAnimation = LauncherAnimUtils.ofPropertyValuesHolder(this,
diff --git a/src/com/android/launcher3/Folder.java b/src/com/android/launcher3/Folder.java
index 5e713b2..7911735 100644
--- a/src/com/android/launcher3/Folder.java
+++ b/src/com/android/launcher3/Folder.java
@@ -450,11 +450,7 @@
             positionAndSizeAsIcon();
             centerAboutIcon();
 
-            PropertyValuesHolder alpha = PropertyValuesHolder.ofFloat("alpha", 1);
-            PropertyValuesHolder scaleX = PropertyValuesHolder.ofFloat("scaleX", 1.0f);
-            PropertyValuesHolder scaleY = PropertyValuesHolder.ofFloat("scaleY", 1.0f);
-            final ObjectAnimator oa =
-                LauncherAnimUtils.ofPropertyValuesHolder(this, alpha, scaleX, scaleY);
+            final ObjectAnimator oa = LauncherAnimUtils.ofViewAlphaAndScale(this, 1, 1, 1);
             oa.setDuration(mExpandDuration);
             openFolderAnim = oa;
 
@@ -477,8 +473,8 @@
             float transY = - 0.075f * (height / 2 - getPivotY());
             setTranslationX(transX);
             setTranslationY(transY);
-            PropertyValuesHolder tx = PropertyValuesHolder.ofFloat("translationX", transX, 0);
-            PropertyValuesHolder ty = PropertyValuesHolder.ofFloat("translationY", transY, 0);
+            PropertyValuesHolder tx = PropertyValuesHolder.ofFloat(TRANSLATION_X, transX, 0);
+            PropertyValuesHolder ty = PropertyValuesHolder.ofFloat(TRANSLATION_Y, transY, 0);
 
             Animator drift = ObjectAnimator.ofPropertyValuesHolder(this, tx, ty);
             drift.setDuration(mMaterialExpandDuration);
@@ -557,6 +553,7 @@
             final boolean updateAnimationFlag = !mDragInProgress;
             openFolderAnim.addListener(new AnimatorListenerAdapter() {
 
+                @SuppressLint("InlinedApi")
                 @Override
                 public void onAnimationEnd(Animator animation) {
                     mFolderName.animate().setDuration(FOLDER_NAME_ANIMATION_DURATION)
@@ -600,7 +597,7 @@
     }
 
     @Override
-    public void onDragStart(DragSource source, Object info, int dragAction) { }
+    public void onDragStart(DragSource source, ItemInfo info, int dragAction) { }
 
     @Override
     public void onDragEnd() {
@@ -623,12 +620,7 @@
 
     public void animateClosed() {
         if (!(getParent() instanceof DragLayer)) return;
-        PropertyValuesHolder alpha = PropertyValuesHolder.ofFloat("alpha", 0);
-        PropertyValuesHolder scaleX = PropertyValuesHolder.ofFloat("scaleX", 0.9f);
-        PropertyValuesHolder scaleY = PropertyValuesHolder.ofFloat("scaleY", 0.9f);
-        final ObjectAnimator oa =
-                LauncherAnimUtils.ofPropertyValuesHolder(this, alpha, scaleX, scaleY);
-
+        final ObjectAnimator oa = LauncherAnimUtils.ofViewAlphaAndScale(this, 0, 0.9f, 0.9f);
         oa.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationEnd(Animator animation) {
@@ -649,7 +641,7 @@
     }
 
     public boolean acceptDrop(DragObject d) {
-        final ItemInfo item = (ItemInfo) d.dragInfo;
+        final ItemInfo item = d.dragInfo;
         final int itemType = item.itemType;
         return ((itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION ||
                     itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT) &&
diff --git a/src/com/android/launcher3/FolderEditText.java b/src/com/android/launcher3/FolderEditText.java
index c311008..c38307c 100644
--- a/src/com/android/launcher3/FolderEditText.java
+++ b/src/com/android/launcher3/FolderEditText.java
@@ -2,6 +2,7 @@
 
 import android.content.Context;
 import android.util.AttributeSet;
+import android.view.DragEvent;
 import android.view.KeyEvent;
 import android.widget.EditText;
 
@@ -33,4 +34,10 @@
         }
         return super.onKeyPreIme(keyCode, event);
     }
+
+    @Override
+    public boolean onDragEvent(DragEvent event) {
+        // We don't want this view to interfere with Launcher own drag and drop.
+        return false;
+    }
 }
diff --git a/src/com/android/launcher3/FolderIcon.java b/src/com/android/launcher3/FolderIcon.java
index 8d534d2..de0df0d 100644
--- a/src/com/android/launcher3/FolderIcon.java
+++ b/src/com/android/launcher3/FolderIcon.java
@@ -330,8 +330,8 @@
                 !mFolder.isFull() && item != mInfo && !mInfo.opened);
     }
 
-    public boolean acceptDrop(Object dragInfo) {
-        final ItemInfo item = (ItemInfo) dragInfo;
+    public boolean acceptDrop(ItemInfo dragInfo) {
+        final ItemInfo item = dragInfo;
         return !mFolder.isDestroyed() && willAcceptItem(item);
     }
 
@@ -339,8 +339,8 @@
         mInfo.add(item);
     }
 
-    public void onDragEnter(Object dragInfo) {
-        if (mFolder.isDestroyed() || !willAcceptItem((ItemInfo) dragInfo)) return;
+    public void onDragEnter(ItemInfo dragInfo) {
+        if (mFolder.isDestroyed() || !willAcceptItem(dragInfo)) return;
         CellLayout.LayoutParams lp = (CellLayout.LayoutParams) getLayoutParams();
         CellLayout layout = (CellLayout) getParent().getParent();
         mFolderRingAnimator.setCell(lp.cellX, lp.cellY);
@@ -356,7 +356,7 @@
             // Workspace#onDropExternal.
             mOpenAlarm.setAlarm(ON_OPEN_DELAY);
         }
-        mDragInfo = (ItemInfo) dragInfo;
+        mDragInfo = dragInfo;
     }
 
     public void onDragOver(Object dragInfo) {
diff --git a/src/com/android/launcher3/FolderInfo.java b/src/com/android/launcher3/FolderInfo.java
index aea21c9..6e0dcd4 100644
--- a/src/com/android/launcher3/FolderInfo.java
+++ b/src/com/android/launcher3/FolderInfo.java
@@ -22,7 +22,6 @@
 import com.android.launcher3.compat.UserHandleCompat;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 
 /**
  * Represents a folder containing shortcuts or apps.
@@ -140,7 +139,7 @@
         return "FolderInfo(id=" + this.id + " type=" + this.itemType
                 + " container=" + this.container + " screen=" + screenId
                 + " cellX=" + cellX + " cellY=" + cellY + " spanX=" + spanX
-                + " spanY=" + spanY + " dropPos=" + Arrays.toString(dropPos) + ")";
+                + " spanY=" + spanY + ")";
     }
 
     public boolean hasOption(int optionFlag) {
diff --git a/src/com/android/launcher3/InfoDropTarget.java b/src/com/android/launcher3/InfoDropTarget.java
index d93cdcc..b4a1445 100644
--- a/src/com/android/launcher3/InfoDropTarget.java
+++ b/src/com/android/launcher3/InfoDropTarget.java
@@ -20,8 +20,6 @@
 import android.content.Context;
 import android.util.AttributeSet;
 
-import com.android.launcher3.compat.UserHandleCompat;
-
 public class InfoDropTarget extends ButtonDropTarget {
 
     public InfoDropTarget(Context context, AttributeSet attrs) {
@@ -41,7 +39,7 @@
         setDrawable(R.drawable.ic_info_launcher);
     }
 
-    public static void startDetailsActivityForInfo(Object info, Launcher launcher) {
+    public static void startDetailsActivityForInfo(ItemInfo info, Launcher launcher) {
         ComponentName componentName = null;
         if (info instanceof AppInfo) {
             componentName = ((AppInfo) info).componentName;
@@ -50,24 +48,17 @@
         } else if (info instanceof PendingAddItemInfo) {
             componentName = ((PendingAddItemInfo) info).componentName;
         }
-        final UserHandleCompat user;
-        if (info instanceof ItemInfo) {
-            user = ((ItemInfo) info).user;
-        } else {
-            user = UserHandleCompat.myUserHandle();
-        }
-
         if (componentName != null) {
-            launcher.startApplicationDetailsActivity(componentName, user);
+            launcher.startApplicationDetailsActivity(componentName, info.user);
         }
     }
 
     @Override
-    protected boolean supportsDrop(DragSource source, Object info) {
+    protected boolean supportsDrop(DragSource source, ItemInfo info) {
         return source.supportsAppInfoDropTarget() && supportsDrop(getContext(), info);
     }
 
-    public static boolean supportsDrop(Context context, Object info) {
+    public static boolean supportsDrop(Context context, ItemInfo info) {
         return info instanceof AppInfo || info instanceof PendingAddItemInfo;
     }
 
diff --git a/src/com/android/launcher3/ItemInfo.java b/src/com/android/launcher3/ItemInfo.java
index f7e0ea4..956bb8c 100644
--- a/src/com/android/launcher3/ItemInfo.java
+++ b/src/com/android/launcher3/ItemInfo.java
@@ -24,8 +24,6 @@
 import com.android.launcher3.compat.UserHandleCompat;
 import com.android.launcher3.compat.UserManagerCompat;
 
-import java.util.Arrays;
-
 /**
  * Represents an item in the launcher.
  */
@@ -35,14 +33,14 @@
      * Intent extra to store the profile. Format: UserHandle
      */
     static final String EXTRA_PROFILE = "profile";
-    
+
     public static final int NO_ID = -1;
-    
+
     /**
      * The id in the settings database for this item
      */
     public long id = NO_ID;
-    
+
     /**
      * One of {@link LauncherSettings.Favorites#ITEM_TYPE_APPLICATION},
      * {@link LauncherSettings.Favorites#ITEM_TYPE_SHORTCUT},
@@ -50,20 +48,20 @@
      * {@link LauncherSettings.Favorites#ITEM_TYPE_APPWIDGET}.
      */
     public int itemType;
-    
+
     /**
-     * The id of the container that holds this item. For the desktop, this will be 
+     * The id of the container that holds this item. For the desktop, this will be
      * {@link LauncherSettings.Favorites#CONTAINER_DESKTOP}. For the all applications folder it
      * will be {@link #NO_ID} (since it is not stored in the settings DB). For user folders
      * it will be the id of the folder.
      */
     public long container = NO_ID;
-    
+
     /**
      * Iindicates the screen in which the shortcut appears.
      */
     public long screenId = -1;
-    
+
     /**
      * Indicates the X position of the associated cell.
      */
@@ -100,11 +98,6 @@
     public int rank = 0;
 
     /**
-     * Indicates that this item needs to be updated in the db
-     */
-    public boolean requiresDbUpdate = false;
-
-    /**
      * Title of the item
      */
     public CharSequence title;
@@ -114,11 +107,6 @@
      */
     public CharSequence contentDescription;
 
-    /**
-     * The position of the item in a drag-and-drop operation.
-     */
-    public int[] dropPos = null;
-
     public UserHandleCompat user;
 
     public ItemInfo() {
@@ -146,7 +134,7 @@
     }
 
     public Intent getIntent() {
-        throw new RuntimeException("Unexpected Intent");
+        return null;
     }
 
     /**
@@ -194,7 +182,6 @@
     public String toString() {
         return "Item(id=" + this.id + " type=" + this.itemType + " container=" + this.container
             + " screen=" + screenId + " cellX=" + cellX + " cellY=" + cellY + " spanX=" + spanX
-            + " spanY=" + spanY + " dropPos=" + Arrays.toString(dropPos)
-            + " user=" + user + ")";
+            + " spanY=" + spanY + " user=" + user + ")";
     }
 }
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 298b2c4..251c090 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -20,7 +20,6 @@
 import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
-import android.animation.PropertyValuesHolder;
 import android.animation.ValueAnimator;
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
@@ -103,6 +102,7 @@
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.compat.UserHandleCompat;
 import com.android.launcher3.compat.UserManagerCompat;
+import com.android.launcher3.config.ProviderConfig;
 import com.android.launcher3.model.WidgetsModel;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.LongArrayMap;
@@ -164,8 +164,6 @@
      */
     protected static final int REQUEST_LAST = 100;
 
-    static final int SCREEN_COUNT = 5;
-
     // To turn on these properties, type
     // adb shell setprop log.tag.PROPERTY_NAME [VERBOSE | SUPPRESS]
     static final String DUMP_STATE_PROPERTY = "launcher_dump_state";
@@ -252,7 +250,7 @@
     private AppWidgetManagerCompat mAppWidgetManager;
     private LauncherAppWidgetHost mAppWidgetHost;
 
-    @Thunk ItemInfo mPendingAddInfo = new ItemInfo();
+    @Thunk final ItemInfo mPendingAddInfo = new ItemInfo();
     private LauncherAppWidgetProviderInfo mPendingAddWidgetInfo;
     private int mPendingAddWidgetId = -1;
 
@@ -294,8 +292,6 @@
     private ArrayList<Runnable> mBindOnResumeCallbacks = new ArrayList<Runnable>();
     private ArrayList<Runnable> mOnResumeCallbacks = new ArrayList<Runnable>();
 
-    private Bundle mSavedInstanceState;
-
     private LauncherModel mModel;
     private IconCache mIconCache;
     @Thunk boolean mUserPresent = true;
@@ -844,24 +840,22 @@
             return;
         }
 
-        // The pattern used here is that a user PICKs a specific application,
-        // which, depending on the target, might need to CREATE the actual target.
-
-        // For example, the user would PICK_SHORTCUT for "Music playlist", and we
-        // launch over to the Music app to actually CREATE_SHORTCUT.
-        if (resultCode == RESULT_OK && mPendingAddInfo.container != ItemInfo.NO_ID) {
-            final PendingAddArguments args = preparePendingAddArgs(requestCode, data, -1,
-                    mPendingAddInfo);
-            if (isWorkspaceLocked()) {
-                sPendingAddItem = args;
-            } else {
-                completeAdd(args);
+        if (requestCode == REQUEST_CREATE_SHORTCUT) {
+            // Handle custom shortcuts created using ACTION_CREATE_SHORTCUT.
+            if (resultCode == RESULT_OK && mPendingAddInfo.container != ItemInfo.NO_ID) {
+                final PendingAddArguments args = preparePendingAddArgs(requestCode, data, -1,
+                        mPendingAddInfo);
+                if (isWorkspaceLocked()) {
+                    sPendingAddItem = args;
+                } else {
+                    completeAdd(args);
+                    mWorkspace.removeExtraEmptyScreenDelayed(true, exitSpringLoaded,
+                            ON_ACTIVITY_RESULT_ANIMATION_DELAY, false);
+                }
+            } else if (resultCode == RESULT_CANCELED) {
                 mWorkspace.removeExtraEmptyScreenDelayed(true, exitSpringLoaded,
                         ON_ACTIVITY_RESULT_ANIMATION_DELAY, false);
             }
-        } else if (resultCode == RESULT_CANCELED) {
-            mWorkspace.removeExtraEmptyScreenDelayed(true, exitSpringLoaded,
-                    ON_ACTIVITY_RESULT_ANIMATION_DELAY, false);
         }
         mDragLayer.clearAnimatedView();
 
@@ -1509,7 +1503,6 @@
     private void completeAddShortcut(Intent data, long container, long screenId, int cellX,
             int cellY) {
         int[] cellXY = mTmpAddItemCellCoordinates;
-        int[] touchXY = mPendingAddInfo.dropPos;
         CellLayout layout = getCellLayout(container, screenId);
 
         ShortcutInfo info = InstallShortcutReceiver.fromShortcutIntent(this, data);
@@ -1536,10 +1529,6 @@
                     true)) {
                 return;
             }
-        } else if (touchXY != null) {
-            // when dragging and dropping, just find the closest free spot
-            int[] result = layout.findNearestVacantArea(touchXY[0], touchXY[1], 1, 1, cellXY);
-            foundCellSpan = (result != null);
         } else {
             foundCellSpan = layout.findCellForSpan(cellXY, 1, 1);
         }
@@ -2215,7 +2204,6 @@
         mPendingAddInfo.cellX = mPendingAddInfo.cellY = -1;
         mPendingAddInfo.spanX = mPendingAddInfo.spanY = -1;
         mPendingAddInfo.minSpanX = mPendingAddInfo.minSpanY = 1;
-        mPendingAddInfo.dropPos = null;
     }
 
     void addAppWidgetImpl(final int appWidgetId, final ItemInfo info, final
@@ -2287,7 +2275,6 @@
         resetAddInfo();
         mPendingAddInfo.container = container;
         mPendingAddInfo.screenId = screenId;
-        mPendingAddInfo.dropPos = null;
 
         if (cell != null) {
             mPendingAddInfo.cellX = cell[0];
@@ -2311,7 +2298,6 @@
         resetAddInfo();
         mPendingAddInfo.container = info.container = container;
         mPendingAddInfo.screenId = info.screenId = screenId;
-        mPendingAddInfo.dropPos = null;
         mPendingAddInfo.minSpanX = info.minSpanX;
         mPendingAddInfo.minSpanY = info.minSpanY;
 
@@ -2471,8 +2457,10 @@
 
         if (v instanceof CellLayout) {
             if (mWorkspace.isInOverviewMode()) {
-                showWorkspace(mWorkspace.indexOfChild(v), true);
+                mWorkspace.snapToPageFromOverView(mWorkspace.indexOfChild(v));
+                showWorkspace(true);
             }
+            return;
         }
 
         Object tag = v.getTag();
@@ -3011,10 +2999,6 @@
 
     private void growAndFadeOutFolderIcon(FolderIcon fi) {
         if (fi == null) return;
-        PropertyValuesHolder alpha = PropertyValuesHolder.ofFloat("alpha", 0);
-        PropertyValuesHolder scaleX = PropertyValuesHolder.ofFloat("scaleX", 1.5f);
-        PropertyValuesHolder scaleY = PropertyValuesHolder.ofFloat("scaleY", 1.5f);
-
         FolderInfo info = (FolderInfo) fi.getTag();
         if (info.container == LauncherSettings.Favorites.CONTAINER_HOTSEAT) {
             CellLayout cl = (CellLayout) fi.getParent().getParent();
@@ -3026,8 +3010,8 @@
         copyFolderIconToImage(fi);
         fi.setVisibility(View.INVISIBLE);
 
-        ObjectAnimator oa = LauncherAnimUtils.ofPropertyValuesHolder(mFolderIconImageView, alpha,
-                scaleX, scaleY);
+        ObjectAnimator oa = LauncherAnimUtils.ofViewAlphaAndScale(
+                mFolderIconImageView, 0, 1.5f, 1.5f);
         if (Utilities.isLmpOrAbove()) {
             oa.setInterpolator(new LogDecelerateInterpolator(100, 0));
         }
@@ -3037,17 +3021,12 @@
 
     private void shrinkAndFadeInFolderIcon(final FolderIcon fi) {
         if (fi == null) return;
-        PropertyValuesHolder alpha = PropertyValuesHolder.ofFloat("alpha", 1.0f);
-        PropertyValuesHolder scaleX = PropertyValuesHolder.ofFloat("scaleX", 1.0f);
-        PropertyValuesHolder scaleY = PropertyValuesHolder.ofFloat("scaleY", 1.0f);
-
         final CellLayout cl = (CellLayout) fi.getParent().getParent();
 
         // We remove and re-draw the FolderIcon in-case it has changed
         mDragLayer.removeView(mFolderIconImageView);
         copyFolderIconToImage(fi);
-        ObjectAnimator oa = LauncherAnimUtils.ofPropertyValuesHolder(mFolderIconImageView, alpha,
-                scaleX, scaleY);
+        ObjectAnimator oa = LauncherAnimUtils.ofViewAlphaAndScale(mFolderIconImageView, 1, 1, 1);
         oa.setDuration(getResources().getInteger(R.integer.config_folderExpandDuration));
         oa.addListener(new AnimatorListenerAdapter() {
             @Override
@@ -3267,25 +3246,16 @@
     }
 
     public void showWorkspace(boolean animated) {
-        showWorkspace(WorkspaceStateTransitionAnimation.SCROLL_TO_CURRENT_PAGE, animated, null);
+        showWorkspace(animated, null);
     }
 
     public void showWorkspace(boolean animated, Runnable onCompleteRunnable) {
-        showWorkspace(WorkspaceStateTransitionAnimation.SCROLL_TO_CURRENT_PAGE, animated,
-                onCompleteRunnable);
-    }
-
-    protected void showWorkspace(int snapToPage, boolean animated) {
-        showWorkspace(snapToPage, animated, null);
-    }
-
-    void showWorkspace(int snapToPage, boolean animated, Runnable onCompleteRunnable) {
         boolean changed = mState != State.WORKSPACE ||
                 mWorkspace.getState() != Workspace.State.NORMAL;
         if (changed) {
             mWorkspace.setVisibility(View.VISIBLE);
             mStateTransitionAnimation.startAnimationToWorkspace(mState, mWorkspace.getState(),
-                    Workspace.State.NORMAL, snapToPage, animated, onCompleteRunnable);
+                    Workspace.State.NORMAL, animated, onCompleteRunnable);
 
             // Set focus to the AppsCustomize button
             if (mAllAppsButton != null) {
@@ -3310,9 +3280,7 @@
     void showOverviewMode(boolean animated) {
         mWorkspace.setVisibility(View.VISIBLE);
         mStateTransitionAnimation.startAnimationToWorkspace(mState, mWorkspace.getState(),
-                Workspace.State.OVERVIEW,
-                WorkspaceStateTransitionAnimation.SCROLL_TO_CURRENT_PAGE, animated,
-                null /* onCompleteRunnable */);
+                Workspace.State.OVERVIEW, animated, null /* onCompleteRunnable */);
         mState = State.WORKSPACE;
     }
 
@@ -3389,14 +3357,26 @@
      * Updates the workspace and interaction state on state change, and return the animation to this
      * new state.
      */
-    public Animator startWorkspaceStateChangeAnimation(Workspace.State toState, int toPage,
+    public Animator startWorkspaceStateChangeAnimation(Workspace.State toState,
             boolean animated, HashMap<View, Integer> layerViews) {
         Workspace.State fromState = mWorkspace.getState();
-        Animator anim = mWorkspace.setStateWithAnimation(toState, toPage, animated, layerViews);
+        Animator anim = mWorkspace.setStateWithAnimation(toState, animated, layerViews);
         updateInteraction(fromState, toState);
         return anim;
     }
 
+    public void onLauncherClingShown() {
+        // When a launcher cling appears, it should cover the underlying layers, so their focus
+        // should be blocked.
+        if (mDragLayer.getDescendantFocusability() != ViewGroup.FOCUS_BLOCK_DESCENDANTS) {
+            mDragLayer.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
+        }
+    }
+
+    public void onLauncherClingDismissed() {
+        mDragLayer.setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
+    }
+
     public void enterSpringLoadedDragMode() {
         if (LOGD) Log.d(TAG, String.format("enterSpringLoadedDragMode [mState=%s", mState.name()));
         if (mState == State.WORKSPACE || mState == State.APPS_SPRING_LOADED ||
@@ -3405,8 +3385,7 @@
         }
 
         mStateTransitionAnimation.startAnimationToWorkspace(mState, mWorkspace.getState(),
-                Workspace.State.SPRING_LOADED,
-                WorkspaceStateTransitionAnimation.SCROLL_TO_CURRENT_PAGE, true /* animated */,
+                Workspace.State.SPRING_LOADED, true /* animated */,
                 null /* onCompleteRunnable */);
         mState = isAppsViewVisible() ? State.APPS_SPRING_LOADED : State.WIDGETS_SPRING_LOADED;
     }
@@ -3626,7 +3605,7 @@
         if (mWorkspace != null) {
             return mWorkspace.getCurrentPage();
         } else {
-            return SCREEN_COUNT / 2;
+            return 0;
         }
     }
 
@@ -3786,7 +3765,7 @@
                             Object tag = v.getTag();
                             String desc = "Collision while binding workspace item: " + item
                                     + ". Collides with " + tag;
-                            if (LauncherAppState.isDogfoodBuild()) {
+                            if (ProviderConfig.IS_DOGFOOD_BUILD) {
                                 throw (new RuntimeException(desc));
                             } else {
                                 Log.d(TAG, desc);
@@ -4073,10 +4052,7 @@
     }
 
     private ValueAnimator createNewAppBounceAnimation(View v, int i) {
-        ValueAnimator bounceAnim = LauncherAnimUtils.ofPropertyValuesHolder(v,
-                PropertyValuesHolder.ofFloat("alpha", 1f),
-                PropertyValuesHolder.ofFloat("scaleX", 1f),
-                PropertyValuesHolder.ofFloat("scaleY", 1f));
+        ValueAnimator bounceAnim = LauncherAnimUtils.ofViewAlphaAndScale(v, 1, 1, 1);
         bounceAnim.setDuration(InstallShortcutReceiver.NEW_SHORTCUT_BOUNCE_DURATION);
         bounceAnim.setStartDelay(i * InstallShortcutReceiver.NEW_SHORTCUT_STAGGER_DELAY);
         bounceAnim.setInterpolator(new OvershootInterpolator(BOUNCE_ANIMATION_TENSION));
@@ -4600,7 +4576,6 @@
         Log.d(TAG, "mWorkspaceLoading=" + mWorkspaceLoading);
         Log.d(TAG, "mRestoring=" + mRestoring);
         Log.d(TAG, "mWaitingForResult=" + mWaitingForResult);
-        Log.d(TAG, "mSavedInstanceState=" + mSavedInstanceState);
         Log.d(TAG, "sFolders.size=" + sFolders.size());
         mModel.dumpState();
         // TODO(hyunyoungs): add mWidgetsView.dumpState(); or mWidgetsModel.dumpState();
diff --git a/src/com/android/launcher3/LauncherAnimUtils.java b/src/com/android/launcher3/LauncherAnimUtils.java
index 6a248a3..853c2ec 100644
--- a/src/com/android/launcher3/LauncherAnimUtils.java
+++ b/src/com/android/launcher3/LauncherAnimUtils.java
@@ -21,14 +21,10 @@
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
 import android.animation.ValueAnimator;
-import android.annotation.TargetApi;
-import android.os.Build;
+import android.util.Property;
 import android.view.View;
-import android.view.ViewAnimationUtils;
 import android.view.ViewTreeObserver;
 
-import com.android.launcher3.util.UiThreadCircularReveal;
-
 import java.util.HashSet;
 import java.util.WeakHashMap;
 
@@ -102,42 +98,32 @@
         return anim;
     }
 
-    public static ObjectAnimator ofFloat(View target, String propertyName, float... values) {
-        ObjectAnimator anim = new ObjectAnimator();
-        anim.setTarget(target);
-        anim.setPropertyName(propertyName);
-        anim.setFloatValues(values);
+    public static ObjectAnimator ofFloat(View target, Property<View, Float> property,
+            float... values) {
+        ObjectAnimator anim = ObjectAnimator.ofFloat(target, property, values);
         cancelOnDestroyActivity(anim);
         new FirstFrameAnimatorHelper(anim, target);
         return anim;
     }
 
+    public static ObjectAnimator ofViewAlphaAndScale(View target,
+            float alpha, float scaleX, float scaleY) {
+        return ofPropertyValuesHolder(target,
+                PropertyValuesHolder.ofFloat(View.ALPHA, alpha),
+                PropertyValuesHolder.ofFloat(View.SCALE_X, scaleX),
+                PropertyValuesHolder.ofFloat(View.SCALE_Y, scaleY));
+    }
+
     public static ObjectAnimator ofPropertyValuesHolder(View target,
             PropertyValuesHolder... values) {
-        ObjectAnimator anim = new ObjectAnimator();
-        anim.setTarget(target);
-        anim.setValues(values);
-        cancelOnDestroyActivity(anim);
-        new FirstFrameAnimatorHelper(anim, target);
-        return anim;
+        return ofPropertyValuesHolder(target, target, values);
     }
 
     public static ObjectAnimator ofPropertyValuesHolder(Object target,
             View view, PropertyValuesHolder... values) {
-        ObjectAnimator anim = new ObjectAnimator();
-        anim.setTarget(target);
-        anim.setValues(values);
+        ObjectAnimator anim = ObjectAnimator.ofPropertyValuesHolder(target, values);
         cancelOnDestroyActivity(anim);
         new FirstFrameAnimatorHelper(anim, view);
         return anim;
     }
-
-    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
-    public static ValueAnimator createCircularReveal(View view, int centerX,
-            int centerY, float startRadius, float endRadius) {
-        ValueAnimator anim = UiThreadCircularReveal.createCircularReveal(view, centerX,
-                centerY, startRadius, endRadius);
-        new FirstFrameAnimatorHelper(anim, view);
-        return anim;
-    }
 }
diff --git a/src/com/android/launcher3/LauncherAppState.java b/src/com/android/launcher3/LauncherAppState.java
index 52f85ea..f261387 100644
--- a/src/com/android/launcher3/LauncherAppState.java
+++ b/src/com/android/launcher3/LauncherAppState.java
@@ -34,7 +34,6 @@
 public class LauncherAppState {
 
     private final AppFilter mAppFilter;
-    private final BuildInfo mBuildInfo;
     @Thunk final LauncherModel mModel;
     private final IconCache mIconCache;
     private final WidgetPreviewLoader mWidgetCache;
@@ -88,7 +87,6 @@
         mWidgetCache = new WidgetPreviewLoader(sContext, mIconCache);
 
         mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
-        mBuildInfo = BuildInfo.loadByName(sContext.getString(R.string.build_info_class));
         mModel = new LauncherModel(this, mIconCache, mAppFilter);
 
         LauncherAppsCompat.getInstance(sContext).addOnAppsChangedCallback(mModel);
@@ -173,8 +171,4 @@
     public InvariantDeviceProfile getInvariantDeviceProfile() {
         return mInvariantDeviceProfile;
     }
-
-    public static boolean isDogfoodBuild() {
-        return getInstance().mBuildInfo.isDogfoodBuild();
-    }
 }
diff --git a/src/com/android/launcher3/LauncherClings.java b/src/com/android/launcher3/LauncherClings.java
index c44ea6b..0315b5c 100644
--- a/src/com/android/launcher3/LauncherClings.java
+++ b/src/com/android/launcher3/LauncherClings.java
@@ -16,8 +16,6 @@
 
 package com.android.launcher3;
 
-import android.accounts.Account;
-import android.accounts.AccountManager;
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
 import android.annotation.TargetApi;
@@ -29,16 +27,19 @@
 import android.os.Bundle;
 import android.os.UserManager;
 import android.provider.Settings;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
+import android.view.View.OnKeyListener;
 import android.view.View.OnLongClickListener;
 import android.view.ViewGroup;
 import android.view.ViewTreeObserver.OnGlobalLayoutListener;
 import android.view.accessibility.AccessibilityManager;
+
 import com.android.launcher3.util.Thunk;
 
-class LauncherClings implements OnClickListener {
+class LauncherClings implements OnClickListener, OnKeyListener {
     private static final String MIGRATION_CLING_DISMISSED_KEY = "cling_gel.migration.dismissed";
     private static final String WORKSPACE_CLING_DISMISSED_KEY = "cling_gel.workspace.dismissed";
 
@@ -85,6 +86,20 @@
         }
     }
 
+    @Override
+    public boolean onKey(View v, int keyCode, KeyEvent event) {
+        if (event.isPrintingKey()) {
+            // Should ignore all printing keys, otherwise they come to the search box.
+            return true;
+        }
+        if (keyCode == KeyEvent.KEYCODE_MENU) {
+            // Menu key goes to the overview mode similar to longpress, therefore it needs to
+            // dismiss the clings.
+            dismissLongPressCling();
+        }
+        return false;
+    }
+
     /**
      * Shows the migration cling.
      *
@@ -92,6 +107,7 @@
      * package was not preinstalled and there exists a db to migrate from.
      */
     public void showMigrationCling() {
+        mLauncher.onLauncherClingShown();
         mLauncher.hideWorkspaceSearchAndHotseat();
 
         ViewGroup root = (ViewGroup) mLauncher.findViewById(R.id.launcher);
@@ -134,7 +150,9 @@
         final ViewGroup content = (ViewGroup) cling.findViewById(R.id.cling_content);
         mInflater.inflate(showWelcome ? R.layout.longpress_cling_welcome_content
                 : R.layout.longpress_cling_content, content);
-        content.findViewById(R.id.cling_dismiss_longpress_info).setOnClickListener(this);
+        final View button = content.findViewById(R.id.cling_dismiss_longpress_info);
+        button.setOnClickListener(this);
+        button.setOnKeyListener(this);
 
         if (TAG_CROP_TOP_AND_SIDES.equals(content.getTag())) {
             Drawable bg = new BorderCropDrawable(mLauncher.getResources().getDrawable(R.drawable.cling_bg),
@@ -142,6 +160,7 @@
             content.setBackground(bg);
         }
 
+        mLauncher.onLauncherClingShown();
         root.addView(cling);
 
         if (showWelcome) {
@@ -159,12 +178,12 @@
                 ObjectAnimator anim;
                 if (TAG_CROP_TOP_AND_SIDES.equals(content.getTag())) {
                     content.setTranslationY(-content.getMeasuredHeight());
-                    anim = LauncherAnimUtils.ofFloat(content, "translationY", 0);
+                    anim = LauncherAnimUtils.ofFloat(content, View.TRANSLATION_Y, 0);
                 } else {
                     content.setScaleX(0);
                     content.setScaleY(0);
-                    PropertyValuesHolder scaleX = PropertyValuesHolder.ofFloat("scaleX", 1);
-                    PropertyValuesHolder scaleY = PropertyValuesHolder.ofFloat("scaleY", 1);
+                    PropertyValuesHolder scaleX = PropertyValuesHolder.ofFloat(View.SCALE_X, 1);
+                    PropertyValuesHolder scaleY = PropertyValuesHolder.ofFloat(View.SCALE_Y, 1);
                     anim = LauncherAnimUtils.ofPropertyValuesHolder(content, scaleX, scaleY);
                 }
 
@@ -178,7 +197,12 @@
     @Thunk void dismissLongPressCling() {
         Runnable dismissCb = new Runnable() {
             public void run() {
-                dismissCling(mLauncher.findViewById(R.id.longpress_cling), null,
+                Runnable cb = new Runnable() {
+                    public void run() {
+                        mLauncher.onLauncherClingDismissed();
+                    }
+                };
+                dismissCling(mLauncher.findViewById(R.id.longpress_cling), cb,
                         WORKSPACE_CLING_DISMISSED_KEY, DISMISS_CLING_DURATION);
             }
         };
diff --git a/src/com/android/launcher3/LauncherModel.java b/src/com/android/launcher3/LauncherModel.java
index d9b0cd4..c3b66ec 100644
--- a/src/com/android/launcher3/LauncherModel.java
+++ b/src/com/android/launcher3/LauncherModel.java
@@ -55,6 +55,7 @@
 import com.android.launcher3.compat.PackageInstallerCompat.PackageInstallInfo;
 import com.android.launcher3.compat.UserHandleCompat;
 import com.android.launcher3.compat.UserManagerCompat;
+import com.android.launcher3.config.ProviderConfig;
 import com.android.launcher3.model.MigrateFromRestoreTask;
 import com.android.launcher3.model.WidgetsModel;
 import com.android.launcher3.util.ComponentKey;
@@ -661,12 +662,7 @@
                         modelShortcut.cellX == shortcut.cellX &&
                         modelShortcut.cellY == shortcut.cellY &&
                         modelShortcut.spanX == shortcut.spanX &&
-                        modelShortcut.spanY == shortcut.spanY &&
-                        ((modelShortcut.dropPos == null && shortcut.dropPos == null) ||
-                        (modelShortcut.dropPos != null &&
-                                shortcut.dropPos != null &&
-                                modelShortcut.dropPos[0] == shortcut.dropPos[0] &&
-                        modelShortcut.dropPos[1] == shortcut.dropPos[1]))) {
+                        modelShortcut.spanY == shortcut.spanY) {
                     // For all intents and purposes, this is the same object
                     return;
                 }
@@ -893,7 +889,7 @@
     }
 
     private void assertWorkspaceLoaded() {
-        if (LauncherAppState.isDogfoodBuild() && (isLoadingWorkspace() || !mHasLoaderCompletedOnce)) {
+        if (ProviderConfig.IS_DOGFOOD_BUILD && (isLoadingWorkspace() || !mHasLoaderCompletedOnce)) {
             throw new RuntimeException("Trying to add shortcut while loader is running");
         }
     }
@@ -1750,8 +1746,7 @@
             final PackageManager manager = context.getPackageManager();
             final boolean isSafeMode = manager.isSafeMode();
             final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(context);
-            final boolean isSdCardReady = context.registerReceiver(null,
-                    new IntentFilter(StartupReceiver.SYSTEM_READY)) != null;
+            final boolean isSdCardReady = Utilities.isBootCompleted();
 
             LauncherAppState app = LauncherAppState.getInstance();
             InvariantDeviceProfile profile = app.getInvariantDeviceProfile();
@@ -2329,7 +2324,7 @@
 
                 if (!isSdCardReady && !sPendingPackages.isEmpty()) {
                     context.registerReceiver(new AppsAvailabilityCheck(),
-                            new IntentFilter(StartupReceiver.SYSTEM_READY),
+                            new IntentFilter(Intent.ACTION_BOOT_COMPLETED),
                             null, sWorker);
                 }
 
@@ -2481,19 +2476,36 @@
         private void sortWorkspaceItemsSpatially(ArrayList<ItemInfo> workspaceItems) {
             final LauncherAppState app = LauncherAppState.getInstance();
             final InvariantDeviceProfile profile = app.getInvariantDeviceProfile();
-            // XXX: review this
+            final int screenCols = profile.numColumns;
+            final int screenCellCount = profile.numColumns * profile.numRows;
             Collections.sort(workspaceItems, new Comparator<ItemInfo>() {
                 @Override
                 public int compare(ItemInfo lhs, ItemInfo rhs) {
-                    int cellCountX = (int) profile.numColumns;
-                    int cellCountY = (int) profile.numRows;
-                    int screenOffset = cellCountX * cellCountY;
-                    int containerOffset = screenOffset * (Launcher.SCREEN_COUNT + 1); // +1 hotseat
-                    long lr = (lhs.container * containerOffset + lhs.screenId * screenOffset +
-                            lhs.cellY * cellCountX + lhs.cellX);
-                    long rr = (rhs.container * containerOffset + rhs.screenId * screenOffset +
-                            rhs.cellY * cellCountX + rhs.cellX);
-                    return (int) (lr - rr);
+                    if (lhs.container == rhs.container) {
+                        // Within containers, order by their spatial position in that container
+                        switch ((int) lhs.container) {
+                            case LauncherSettings.Favorites.CONTAINER_DESKTOP: {
+                                long lr = (lhs.screenId * screenCellCount +
+                                        lhs.cellY * screenCols + lhs.cellX);
+                                long rr = (rhs.screenId * screenCellCount +
+                                        rhs.cellY * screenCols + rhs.cellX);
+                                return (int) (lr - rr);
+                            }
+                            case LauncherSettings.Favorites.CONTAINER_HOTSEAT: {
+                                // We currently use the screen id as the rank
+                                return (int) (lhs.screenId - rhs.screenId);
+                            }
+                            default:
+                                if (ProviderConfig.IS_DOGFOOD_BUILD) {
+                                    throw new RuntimeException("Unexpected container type when " +
+                                            "sorting workspace items.");
+                                }
+                                return 0;
+                        }
+                    } else {
+                        // Between containers, order by hotseat, desktop
+                        return (int) (lhs.container - rhs.container);
+                    }
                 }
             });
         }
diff --git a/src/com/android/launcher3/LauncherStateTransitionAnimation.java b/src/com/android/launcher3/LauncherStateTransitionAnimation.java
index 5a3f3dc..b2ab618 100644
--- a/src/com/android/launcher3/LauncherStateTransitionAnimation.java
+++ b/src/com/android/launcher3/LauncherStateTransitionAnimation.java
@@ -30,8 +30,8 @@
 import android.view.animation.DecelerateInterpolator;
 
 import com.android.launcher3.allapps.AllAppsContainerView;
-import com.android.launcher3.util.UiThreadCircularReveal;
 import com.android.launcher3.util.Thunk;
+import com.android.launcher3.util.UiThreadCircularReveal;
 import com.android.launcher3.widget.WidgetsContainerView;
 
 import java.util.HashMap;
@@ -162,7 +162,6 @@
             final boolean animated) {
         final WidgetsContainerView toView = mLauncher.getWidgetsView();
         final View buttonView = mLauncher.getWidgetsButton();
-
         PrivateTransitionCallbacks cb = new PrivateTransitionCallbacks() {
             @Override
             public float getMaterialRevealViewFinalAlpha(View revealView) {
@@ -179,7 +178,7 @@
      */
     public void startAnimationToWorkspace(final Launcher.State fromState,
             final Workspace.State fromWorkspaceState, final Workspace.State toWorkspaceState,
-            final int toWorkspacePage, final boolean animated, final Runnable onCompleteRunnable) {
+            final boolean animated, final Runnable onCompleteRunnable) {
         if (toWorkspaceState != Workspace.State.NORMAL &&
                 toWorkspaceState != Workspace.State.SPRING_LOADED &&
                 toWorkspaceState != Workspace.State.OVERVIEW) {
@@ -187,10 +186,10 @@
         }
 
         if (fromState == Launcher.State.APPS || fromState == Launcher.State.APPS_SPRING_LOADED) {
-            startAnimationToWorkspaceFromAllApps(fromWorkspaceState, toWorkspaceState, toWorkspacePage,
+            startAnimationToWorkspaceFromAllApps(fromWorkspaceState, toWorkspaceState,
                     animated, onCompleteRunnable);
         } else {
-            startAnimationToWorkspaceFromWidgets(fromWorkspaceState, toWorkspaceState, toWorkspacePage,
+            startAnimationToWorkspaceFromWidgets(fromWorkspaceState, toWorkspaceState,
                     animated, onCompleteRunnable);
         }
     }
@@ -222,7 +221,7 @@
 
         // Create the workspace animation.
         // NOTE: this call apparently also sets the state for the workspace if !animated
-        Animator workspaceAnim = mLauncher.startWorkspaceStateChangeAnimation(toWorkspaceState, -1,
+        Animator workspaceAnim = mLauncher.startWorkspaceStateChangeAnimation(toWorkspaceState,
                 animated, layerViews);
 
         // Animate the search bar
@@ -257,11 +256,11 @@
 
             // Create the animators
             PropertyValuesHolder panelAlpha =
-                    PropertyValuesHolder.ofFloat("alpha", revealViewToAlpha, 1f);
+                    PropertyValuesHolder.ofFloat(View.ALPHA, revealViewToAlpha, 1f);
             PropertyValuesHolder panelDriftY =
-                    PropertyValuesHolder.ofFloat("translationY", revealViewToYDrift, 0);
+                    PropertyValuesHolder.ofFloat(View.TRANSLATION_Y, revealViewToYDrift, 0);
             PropertyValuesHolder panelDriftX =
-                    PropertyValuesHolder.ofFloat("translationX", revealViewToXDrift, 0);
+                    PropertyValuesHolder.ofFloat(View.TRANSLATION_X, revealViewToXDrift, 0);
             ObjectAnimator panelAlphaAndDrift = ObjectAnimator.ofPropertyValuesHolder(revealView,
                     panelAlpha, panelDriftY, panelDriftX);
             panelAlphaAndDrift.setDuration(revealDuration);
@@ -406,8 +405,8 @@
      * Starts and animation to the workspace from the apps view.
      */
     private void startAnimationToWorkspaceFromAllApps(final Workspace.State fromWorkspaceState,
-            final Workspace.State toWorkspaceState, final int toWorkspacePage,
-            final boolean animated, final Runnable onCompleteRunnable) {
+            final Workspace.State toWorkspaceState, final boolean animated, 
+            final Runnable onCompleteRunnable) {
         AllAppsContainerView appsView = mLauncher.getAppsView();
         PrivateTransitionCallbacks cb = new PrivateTransitionCallbacks() {
             @Override
@@ -442,7 +441,7 @@
         };
         // Only animate the search bar if animating to spring loaded mode from all apps
         mCurrentAnimation = startAnimationToWorkspaceFromOverlay(fromWorkspaceState, toWorkspaceState,
-                toWorkspacePage, mLauncher.getAllAppsButton(), appsView, appsView.getContentView(),
+                mLauncher.getAllAppsButton(), appsView, appsView.getContentView(),
                 appsView.getRevealView(), appsView.getSearchBarView(), animated,
                 onCompleteRunnable, cb);
     }
@@ -451,8 +450,8 @@
      * Starts and animation to the workspace from the widgets view.
      */
     private void startAnimationToWorkspaceFromWidgets(final Workspace.State fromWorkspaceState,
-            final Workspace.State toWorkspaceState, final int toWorkspacePage,
-            final boolean animated, final Runnable onCompleteRunnable) {
+            final Workspace.State toWorkspaceState, final boolean animated, 
+            final Runnable onCompleteRunnable) {
         final WidgetsContainerView widgetsView = mLauncher.getWidgetsView();
         PrivateTransitionCallbacks cb = new PrivateTransitionCallbacks() {
             @Override
@@ -471,7 +470,7 @@
             }
         };
         mCurrentAnimation = startAnimationToWorkspaceFromOverlay(fromWorkspaceState,
-                toWorkspaceState, toWorkspacePage, mLauncher.getWidgetsButton(), widgetsView,
+                toWorkspaceState, mLauncher.getWidgetsButton(), widgetsView,
                 widgetsView.getContentView(), widgetsView.getRevealView(), null, animated,
                 onCompleteRunnable, cb);
     }
@@ -480,7 +479,7 @@
      * Creates and starts a new animation to the workspace.
      */
     private AnimatorSet startAnimationToWorkspaceFromOverlay(final Workspace.State fromWorkspaceState,
-            final Workspace.State toWorkspaceState, final int toWorkspacePage, final View buttonView,
+            final Workspace.State toWorkspaceState, final View buttonView,
             final View fromView, final View contentView, final View revealView,
             final View overlaySearchBarView, final boolean animated, final Runnable onCompleteRunnable,
             final PrivateTransitionCallbacks pCb) {
@@ -504,7 +503,7 @@
         // Create the workspace animation.
         // NOTE: this call apparently also sets the state for the workspace if !animated
         Animator workspaceAnim = mLauncher.startWorkspaceStateChangeAnimation(toWorkspaceState,
-                toWorkspacePage, animated, layerViews);
+                animated, layerViews);
 
         // Animate the search bar
         startWorkspaceSearchBarAnimation(animation, fromWorkspaceState, toWorkspaceState,
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index 218c1a3..8769c99 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -18,10 +18,10 @@
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
-import android.animation.AnimatorSet;
 import android.animation.LayoutTransition;
 import android.animation.ObjectAnimator;
 import android.animation.TimeInterpolator;
+import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.res.TypedArray;
@@ -47,10 +47,8 @@
 import android.view.accessibility.AccessibilityManager;
 import android.view.accessibility.AccessibilityNodeInfo;
 import android.view.animation.Interpolator;
-
 import com.android.launcher3.util.LauncherEdgeEffect;
 import com.android.launcher3.util.Thunk;
-
 import java.util.ArrayList;
 
 /**
@@ -67,7 +65,6 @@
 
     protected static final int PAGE_SNAP_ANIMATION_DURATION = 750;
     protected static final int SLOW_PAGE_SNAP_ANIMATION_DURATION = 950;
-    protected static final float NANOTIME_DIV = 1000000000.0f;
 
     private static final float RETURN_TO_ORIGINAL_PAGE_THRESHOLD = 0.33f;
     // The page is moved more than halfway, automatically move to the next page on touch up.
@@ -87,25 +84,19 @@
     private int mFreeScrollMinScrollX = -1;
     private int mFreeScrollMaxScrollX = -1;
 
-    static final int AUTOMATIC_PAGE_SPACING = -1;
-
     protected int mFlingThresholdVelocity;
     protected int mMinFlingVelocity;
     protected int mMinSnapVelocity;
 
-    protected float mDensity;
-    protected float mSmoothingTime;
-    protected float mTouchX;
-
     protected boolean mFirstLayout = true;
     private int mNormalChildHeight;
 
     protected int mCurrentPage;
     protected int mRestorePage = INVALID_RESTORE_PAGE;
-    protected int mChildCountOnLastLayout;
+    private int mChildCountOnLastLayout;
 
     protected int mNextPage = INVALID_PAGE;
-    protected int mMaxScrollX;
+    private int mMaxScrollX;
     protected LauncherScroller mScroller;
     private Interpolator mDefaultInterpolator;
     private VelocityTracker mVelocityTracker;
@@ -117,10 +108,10 @@
     private float mDownMotionY;
     private float mDownScrollX;
     private float mDragViewBaselineLeft;
-    protected float mLastMotionX;
-    protected float mLastMotionXRemainder;
-    protected float mLastMotionY;
-    protected float mTotalMotionX;
+    private float mLastMotionX;
+    private float mLastMotionXRemainder;
+    private float mLastMotionY;
+    private float mTotalMotionX;
     private int mLastScreenCenter = -1;
 
     private boolean mCancelTap;
@@ -133,23 +124,17 @@
     protected final static int TOUCH_STATE_NEXT_PAGE = 3;
     protected final static int TOUCH_STATE_REORDERING = 4;
 
-    protected final static float ALPHA_QUANTIZE_LEVEL = 0.0001f;
-
     protected int mTouchState = TOUCH_STATE_REST;
-    protected boolean mForceScreenScrolled = false;
+    private boolean mForceScreenScrolled = false;
 
     protected OnLongClickListener mLongClickListener;
 
     protected int mTouchSlop;
     private int mMaximumVelocity;
-    protected int mPageLayoutWidthGap;
-    protected int mPageLayoutHeightGap;
     protected int mCellCountX = 0;
     protected int mCellCountY = 0;
-    protected boolean mCenterPagesVertically;
     protected boolean mAllowOverScroll = true;
     protected int[] mTempVisiblePagesRange = new int[2];
-    protected boolean mForceDrawAllChildrenNextFrame;
 
     protected static final int INVALID_POINTER = -1;
 
@@ -180,7 +165,7 @@
 
     private float mMinScale = 1f;
     private boolean mUseMinScale = false;
-    protected View mDragView;
+    @Thunk View mDragView;
     private Runnable mSidePageHoverRunnable;
     @Thunk int mSidePageHoverIndex = -1;
     // This variable's scope is only for the duration of startReordering() and endReordering()
@@ -189,12 +174,12 @@
     // animation after endReordering()
     private boolean mIsReordering;
     // The runnable that settles the page after snapToPage and animateDragViewToOriginalPosition
-    private int NUM_ANIMATIONS_RUNNING_BEFORE_ZOOM_OUT = 2;
+    private static final int NUM_ANIMATIONS_RUNNING_BEFORE_ZOOM_OUT = 2;
     private int mPostReorderingPreZoomInRemainingAnimationCount;
     private Runnable mPostReorderingPreZoomInRunnable;
 
     // Convenience/caching
-    private static final Matrix sTmpInvMatrix = new Matrix();
+    protected static final Matrix sTmpInvMatrix = new Matrix();
     private static final float[] sTmpPoint = new float[2];
     private static final int[] sTmpIntPoint = new int[2];
     private static final Rect sTmpRect = new Rect();
@@ -223,11 +208,6 @@
 
         TypedArray a = context.obtainStyledAttributes(attrs,
                 R.styleable.PagedView, defStyle, 0);
-
-        mPageLayoutWidthGap = a.getDimensionPixelSize(
-                R.styleable.PagedView_pageLayoutWidthGap, 0);
-        mPageLayoutHeightGap = a.getDimensionPixelSize(
-                R.styleable.PagedView_pageLayoutHeightGap, 0);
         mPageIndicatorViewId = a.getResourceId(R.styleable.PagedView_pageIndicator, -1);
         a.recycle();
 
@@ -243,16 +223,15 @@
         mScroller = new LauncherScroller(getContext());
         setDefaultInterpolator(new ScrollInterpolator());
         mCurrentPage = 0;
-        mCenterPagesVertically = true;
 
         final ViewConfiguration configuration = ViewConfiguration.get(getContext());
         mTouchSlop = configuration.getScaledPagingTouchSlop();
         mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
-        mDensity = getResources().getDisplayMetrics().density;
 
-        mFlingThresholdVelocity = (int) (FLING_THRESHOLD_VELOCITY * mDensity);
-        mMinFlingVelocity = (int) (MIN_FLING_VELOCITY * mDensity);
-        mMinSnapVelocity = (int) (MIN_SNAP_VELOCITY * mDensity);
+        float density = getResources().getDisplayMetrics().density;
+        mFlingThresholdVelocity = (int) (FLING_THRESHOLD_VELOCITY * density);
+        mMinFlingVelocity = (int) (MIN_FLING_VELOCITY * density);
+        mMinSnapVelocity = (int) (MIN_SNAP_VELOCITY * density);
         setOnHierarchyChangeListener(this);
         setWillNotDraw(false);
     }
@@ -606,9 +585,6 @@
             super.scrollTo(x, y);
         }
 
-        mTouchX = x;
-        mSmoothingTime = System.nanoTime() / NANOTIME_DIV;
-
         // Update the last motion events when scrolling
         if (isReordering(true)) {
             float[] p = mapPointFromParentToView(this, mParentDownMotionX, mParentDownMotionY);
@@ -836,6 +812,7 @@
         setMeasuredDimension(scaledWidthSize, scaledHeightSize);
     }
 
+    @SuppressLint("DrawAllocation")
     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
         if (getChildCount() == 0) {
@@ -874,9 +851,7 @@
                     childTop = offsetY;
                 } else {
                     childTop = offsetY + getPaddingTop() + mInsets.top;
-                    if (mCenterPagesVertically) {
-                        childTop += (getViewportHeight() - mInsets.top - mInsets.bottom - verticalPadding - child.getMeasuredHeight()) / 2;
-                    }
+                    childTop += (getViewportHeight() - mInsets.top - mInsets.bottom - verticalPadding - child.getMeasuredHeight()) / 2;
                 }
 
                 final int childWidth = child.getMeasuredWidth();
@@ -1136,8 +1111,7 @@
                 for (int i = pageCount - 1; i >= 0; i--) {
                     final View v = getPageAt(i);
                     if (v == mDragView) continue;
-                    if (mForceDrawAllChildrenNextFrame ||
-                               (leftScreen <= i && i <= rightScreen && shouldDrawChild(v))) {
+                    if (leftScreen <= i && i <= rightScreen && shouldDrawChild(v)) {
                         drawChild(canvas, v, drawingTime);
                     }
                 }
@@ -1146,7 +1120,6 @@
                     drawChild(canvas, mDragView, drawingTime);
                 }
 
-                mForceDrawAllChildrenNextFrame = false;
                 canvas.restore();
             }
         }
@@ -1450,8 +1423,6 @@
             mTotalMotionX += Math.abs(mLastMotionX - x);
             mLastMotionX = x;
             mLastMotionXRemainder = 0;
-            mTouchX = getViewportOffsetX() + getScrollX();
-            mSmoothingTime = System.nanoTime() / NANOTIME_DIV;
             onScrollInteractionBegin();
             pageBeginMoving();
         }
@@ -1650,8 +1621,6 @@
                 // keep the remainder because we are actually testing if we've moved from the last
                 // scrolled position (which is discrete).
                 if (Math.abs(deltaX) >= 1.0f) {
-                    mTouchX += deltaX;
-                    mSmoothingTime = System.nanoTime() / NANOTIME_DIV;
                     scrollBy((int) deltaX, 0);
                     mLastMotionX = x;
                     mLastMotionXRemainder = deltaX - (int) deltaX;
@@ -1711,16 +1680,14 @@
 
                                     // Animate the view translation from its old position to its new
                                     // position
-                                    AnimatorSet anim = (AnimatorSet) v.getTag(ANIM_TAG_KEY);
+                                    ObjectAnimator anim = (ObjectAnimator) v.getTag();
                                     if (anim != null) {
                                         anim.cancel();
                                     }
 
                                     v.setTranslationX(oldX - newX);
-                                    anim = new AnimatorSet();
+                                    anim = LauncherAnimUtils.ofFloat(v, View.TRANSLATION_X, 0);
                                     anim.setDuration(REORDERING_REORDER_REPOSITION_DURATION);
-                                    anim.playTogether(
-                                            ObjectAnimator.ofFloat(v, "translationX", 0f));
                                     anim.start();
                                     v.setTag(anim);
                                 }
@@ -2170,13 +2137,12 @@
     // Animate the drag view back to the original position
     private void animateDragViewToOriginalPosition() {
         if (mDragView != null) {
-            AnimatorSet anim = new AnimatorSet();
-            anim.setDuration(REORDERING_DROP_REPOSITION_DURATION);
-            anim.playTogether(
-                    ObjectAnimator.ofFloat(mDragView, "translationX", 0f),
-                    ObjectAnimator.ofFloat(mDragView, "translationY", 0f),
-                    ObjectAnimator.ofFloat(mDragView, "scaleX", 1f),
-                    ObjectAnimator.ofFloat(mDragView, "scaleY", 1f));
+            Animator anim = new LauncherViewPropertyAnimator(mDragView)
+                    .translationX(0)
+                    .translationY(0)
+                    .scaleX(1)
+                    .scaleY(1)
+                    .setDuration(REORDERING_DROP_REPOSITION_DURATION);
             anim.addListener(new AnimatorListenerAdapter() {
                 @Override
                 public void onAnimationEnd(Animator animation) {
@@ -2273,9 +2239,8 @@
         animateDragViewToOriginalPosition();
     }
 
-    private static final int ANIM_TAG_KEY = 100;
-
     /* Accessibility */
+    @SuppressWarnings("deprecation")
     @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     @Override
     public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
diff --git a/src/com/android/launcher3/SearchDropTargetBar.java b/src/com/android/launcher3/SearchDropTargetBar.java
index 1efdfb6..f54d9d8 100644
--- a/src/com/android/launcher3/SearchDropTargetBar.java
+++ b/src/com/android/launcher3/SearchDropTargetBar.java
@@ -200,7 +200,7 @@
      * DragController.DragListener implementation
      */
     @Override
-    public void onDragStart(DragSource source, Object info, int dragAction) {
+    public void onDragStart(DragSource source, ItemInfo info, int dragAction) {
         animateToState(State.DROP_TARGET, DEFAULT_DRAG_FADE_DURATION);
     }
 
diff --git a/src/com/android/launcher3/ShortcutInfo.java b/src/com/android/launcher3/ShortcutInfo.java
index 5766cf2..f2c46de 100644
--- a/src/com/android/launcher3/ShortcutInfo.java
+++ b/src/com/android/launcher3/ShortcutInfo.java
@@ -29,7 +29,6 @@
 import com.android.launcher3.compat.UserManagerCompat;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 
 /**
  * Represents a launchable icon on the workspaces and in folders.
@@ -245,7 +244,7 @@
         return "ShortcutInfo(title=" + title + "intent=" + intent + "id=" + this.id
                 + " type=" + this.itemType + " container=" + this.container + " screen=" + screenId
                 + " cellX=" + cellX + " cellY=" + cellY + " spanX=" + spanX + " spanY=" + spanY
-                + " dropPos=" + Arrays.toString(dropPos) + " user=" + user + ")";
+                + " user=" + user + ")";
     }
 
     public static void dumpShortcutInfoList(String tag, String label,
diff --git a/src/com/android/launcher3/StartupReceiver.java b/src/com/android/launcher3/StartupReceiver.java
deleted file mode 100644
index 65f913f..0000000
--- a/src/com/android/launcher3/StartupReceiver.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package com.android.launcher3;
-
-import android.content.BroadcastReceiver;
-import android.content.Context;
-import android.content.Intent;
-
-public class StartupReceiver extends BroadcastReceiver {
-
-    static final String SYSTEM_READY = "com.android.launcher3.SYSTEM_READY";
-
-    @Override
-    public void onReceive(Context context, Intent intent) {
-        context.sendStickyBroadcast(new Intent(SYSTEM_READY));
-    }
-}
diff --git a/src/com/android/launcher3/Stats.java b/src/com/android/launcher3/Stats.java
index cb0e252..4aba150 100644
--- a/src/com/android/launcher3/Stats.java
+++ b/src/com/android/launcher3/Stats.java
@@ -25,6 +25,8 @@
 import android.view.View;
 import android.view.ViewParent;
 
+import com.android.launcher3.config.ProviderConfig;
+
 public class Stats {
 
     /**
@@ -71,7 +73,7 @@
 
             if (provider != null) {
                 provider.fillInLaunchSourceData(sourceData);
-            } else if (LauncherAppState.isDogfoodBuild()) {
+            } else if (ProviderConfig.IS_DOGFOOD_BUILD) {
                 throw new RuntimeException("Expected LaunchSourceProvider");
             }
         }
diff --git a/src/com/android/launcher3/UninstallDropTarget.java b/src/com/android/launcher3/UninstallDropTarget.java
index 0819f8c..7c548a5 100644
--- a/src/com/android/launcher3/UninstallDropTarget.java
+++ b/src/com/android/launcher3/UninstallDropTarget.java
@@ -8,7 +8,7 @@
 import android.os.UserManager;
 import android.util.AttributeSet;
 import android.util.Pair;
-import com.android.launcher3.R;
+
 import com.android.launcher3.compat.UserHandleCompat;
 import com.android.launcher3.util.Thunk;
 
@@ -32,7 +32,7 @@
     }
 
     @Override
-    protected boolean supportsDrop(DragSource source, Object info) {
+    protected boolean supportsDrop(DragSource source, ItemInfo info) {
         return supportsDrop(getContext(), info);
     }
 
@@ -81,7 +81,7 @@
     @Override
     void completeDrop(final DragObject d) {
         final Pair<ComponentName, Integer> componentInfo = getAppInfoFlags(d.dragInfo);
-        final UserHandleCompat user = ((ItemInfo) d.dragInfo).user;
+        final UserHandleCompat user = d.dragInfo.user;
         if (startUninstallActivity(mLauncher, d.dragInfo)) {
 
             final Runnable checkIfUninstallWasSuccess = new Runnable() {
@@ -99,9 +99,9 @@
         }
     }
 
-    public static boolean startUninstallActivity(Launcher launcher, Object info) {
+    public static boolean startUninstallActivity(Launcher launcher, ItemInfo info) {
         final Pair<ComponentName, Integer> componentInfo = getAppInfoFlags(info);
-        final UserHandleCompat user = ((ItemInfo) info).user;
+        final UserHandleCompat user = info.user;
         return launcher.startApplicationUninstallActivity(
                 componentInfo.first, componentInfo.second, user);
     }
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 8fd298d..00d4c8d 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -56,8 +56,11 @@
 import android.view.View;
 import android.widget.Toast;
 
+import com.android.launcher3.config.ProviderConfig;
+
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.Locale;
 import java.util.Set;
@@ -127,6 +130,18 @@
         return Build.VERSION.SDK_INT == 22;
     }
 
+    public static boolean isNycOrAbove() {
+        // TODO(vadimt): Replace using reflection with looking at the API version once
+        // Build.VERSION.SDK_INT gets bumped to 24. b/22942492.
+        try {
+            View.class.getDeclaredField("DRAG_FLAG_OPAQUE");
+            // View.DRAG_FLAG_OPAQUE doesn't exist in M-release, so it's an indication of N+.
+            return true;
+        } catch (NoSuchFieldException e) {
+            return false;
+        }
+    }
+
     public static Bitmap createIconBitmap(Cursor c, int iconIndex, Context context) {
         byte[] data = c.getBlob(iconIndex);
         try {
@@ -660,7 +675,7 @@
     }
 
     public static void assertWorkerThread() {
-        if (LauncherAppState.isDogfoodBuild() &&
+        if (ProviderConfig.IS_DOGFOOD_BUILD &&
                 (LauncherModel.sWorkerThread.getThreadId() != Process.myTid())) {
             throw new IllegalStateException();
         }
@@ -709,4 +724,18 @@
     public static String createDbSelectionQuery(String columnName, Iterable<?> values) {
         return String.format(Locale.ENGLISH, "%s IN (%s)", columnName, TextUtils.join(", ", values));
     }
+
+    @SuppressWarnings({"unchecked", "rawtypes"})
+    public static boolean isBootCompleted() {
+        try {
+            Class clazz = Class.forName("android.os.SystemProperties");
+            Method getter = clazz.getDeclaredMethod("get", String.class);
+            String value = (String) getter.invoke(null, "sys.boot_completed");
+            return "1".equals(value);
+        } catch (Exception e) {
+            Log.d(TAG, "Unable to read system properties");
+            // Assume that boot has completed
+            return true;
+        }
+    }
 }
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 17e59a6..1fbc779 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -68,6 +68,7 @@
 import com.android.launcher3.accessibility.LauncherAccessibilityDelegate.AccessibilityDragSource;
 import com.android.launcher3.accessibility.OverviewScreenAccessibilityDelegate;
 import com.android.launcher3.compat.UserHandleCompat;
+import com.android.launcher3.config.ProviderConfig;
 import com.android.launcher3.util.LongArrayMap;
 import com.android.launcher3.util.Thunk;
 import com.android.launcher3.util.WallpaperUtils;
@@ -92,13 +93,17 @@
 
     private static boolean ENFORCE_DRAG_EVENT_ORDER = false;
 
-    protected static final int SNAP_OFF_EMPTY_SCREEN_DURATION = 400;
-    protected static final int FADE_EMPTY_SCREEN_DURATION = 150;
+    private static final int SNAP_OFF_EMPTY_SCREEN_DURATION = 400;
+    private static final int FADE_EMPTY_SCREEN_DURATION = 150;
 
     private static final int ADJACENT_SCREEN_DROP_DURATION = 300;
 
-    static final boolean MAP_NO_RECURSE = false;
-    static final boolean MAP_RECURSE = true;
+    private static final boolean MAP_NO_RECURSE = false;
+    private static final boolean MAP_RECURSE = true;
+
+    // The screen id used for the empty screen always present to the right.
+    public final static long EXTRA_EMPTY_SCREEN_ID = -201;
+    private final static long CUSTOM_CONTENT_SCREEN_ID = -301;
 
     private static final long CUSTOM_CONTENT_GESTURE_DELAY = 200;
     private long mTouchDownTime = -1;
@@ -113,10 +118,6 @@
 
     private ShortcutAndWidgetContainer mDragSourceInternal;
 
-    // The screen id used for the empty screen always present to the right.
-    final static long EXTRA_EMPTY_SCREEN_ID = -201;
-    private final static long CUSTOM_CONTENT_SCREEN_ID = -301;
-
     @Thunk LongArrayMap<CellLayout> mWorkspaceScreens = new LongArrayMap<>();
     @Thunk ArrayList<Long> mScreenOrder = new ArrayList<Long>();
 
@@ -136,8 +137,8 @@
     private int mDragOverX = -1;
     private int mDragOverY = -1;
 
-    static Rect mLandscapeCellLayoutMetrics = null;
-    static Rect mPortraitCellLayoutMetrics = null;
+    private static Rect mLandscapeCellLayoutMetrics = null;
+    private static Rect mPortraitCellLayoutMetrics = null;
 
     CustomContentCallbacks mCustomContentCallbacks;
     boolean mCustomContentShowing;
@@ -164,12 +165,11 @@
 
     // These are temporary variables to prevent having to allocate a new object just to
     // return an (x, y) value from helper functions. Do NOT use them to maintain other state.
-    private int[] mTempCell = new int[2];
-    private int[] mTempPt = new int[2];
-    private int[] mTempEstimate = new int[2];
+    private static final Rect sTempRect = new Rect();
+    private final int[] mTempXY = new int[2];
     @Thunk float[] mDragViewVisualCenter = new float[2];
     private float[] mTempCellLayoutCenterCoordinates = new float[2];
-    private Matrix mTempInverseMatrix = new Matrix();
+    private int[] mTempVisiblePagesRange = new int[2];
 
     private SpringLoadedDragController mSpringLoadedDragController;
     private float mSpringLoadedShrinkFactor;
@@ -200,7 +200,6 @@
     private boolean mIsSwitchingState = false;
 
     boolean mAnimatingViewIntoPlace = false;
-    boolean mIsDragOccuring = false;
     boolean mChildrenLayersEnabled = true;
 
     private boolean mStripScreensOnPageStopMoving = false;
@@ -210,9 +209,6 @@
 
     private HolographicOutlineHelper mOutlineHelper;
     @Thunk Bitmap mDragOutline = null;
-    private static final Rect sTempRect = new Rect();
-    private final int[] mTempXY = new int[2];
-    private int[] mTempVisiblePagesRange = new int[2];
     public static final int DRAG_BITMAP_PADDING = 2;
     private boolean mWorkspaceFadeInAdjacentScreens;
 
@@ -223,7 +219,6 @@
 
     @Thunk Runnable mDelayedResizeRunnable;
     private Runnable mDelayedSnapToPageRunnable;
-    private Point mDisplaySize = new Point();
 
     // Variables relating to the creation of user folders by hovering shortcuts over shortcuts
     private static final int FOLDER_CREATION_TIMEOUT = 0;
@@ -381,12 +376,11 @@
     }
 
     @Override
-    public void onDragStart(final DragSource source, Object info, int dragAction) {
+    public void onDragStart(final DragSource source, ItemInfo info, int dragAction) {
         if (ENFORCE_DRAG_EVENT_ORDER) {
             enfoceDragParity("onDragStart", 0, 0);
         }
 
-        mIsDragOccuring = true;
         updateChildrenLayersEnabled(false);
         mLauncher.lockScreenOrientation();
         mLauncher.onInteractionBegin();
@@ -417,7 +411,6 @@
             removeExtraEmptyScreen(true, mDragSourceInternal != null);
         }
 
-        mIsDragOccuring = false;
         updateChildrenLayersEnabled(false);
         mLauncher.unlockScreenOrientation(false);
 
@@ -445,8 +438,6 @@
         setupLayoutTransition();
 
         mWallpaperOffset = new WallpaperOffsetInterpolator();
-        Display display = mLauncher.getWindowManager().getDefaultDisplay();
-        display.getSize(mDisplaySize);
 
         mMaxDistanceForFolderCreation = (0.55f * grid.iconSizePx);
 
@@ -1848,8 +1839,18 @@
         updateChildrenLayersEnabled(false);
     }
 
+    @Override
+    protected void getVisiblePages(int[] range) {
+        super.getVisiblePages(range);
+        if (mState == State.OVERVIEW || mState == State.SPRING_LOADED) {
+            // In overview mode, make sure that the two side pages are visible.
+            range[0] = Math.min(range[0], Math.max(getCurrentPage() - 1, numCustomPages()));
+            range[1] = Math.max(range[0], Math.min(getCurrentPage() + 1, getPageCount() - 1));
+        }
+    }
+
     protected void onWallpaperTap(MotionEvent ev) {
-        final int[] position = mTempCell;
+        final int[] position = mTempXY;
         getLocationOnScreen(position);
 
         int pointerIndex = ev.getActionIndex();
@@ -1968,6 +1969,10 @@
         return mState == State.OVERVIEW;
     }
 
+    public void snapToPageFromOverView(int whichPage) {
+        mStateTransitionAnimation.snapToPageFromOverView(whichPage);
+    }
+
     int getOverviewModeTranslationY() {
         DeviceProfile grid = mLauncher.getDeviceProfile();
         Rect workspacePadding = grid.getWorkspacePadding(Utilities.isRtl(getResources()));
@@ -1987,15 +1992,19 @@
      * Sets the current workspace {@link State}, returning an animation transitioning the workspace
      * to that new state.
      */
-    public Animator setStateWithAnimation(State toState, int toPage, boolean animated,
+    public Animator setStateWithAnimation(State toState, boolean animated,
             HashMap<View, Integer> layerViews) {
         // Create the animation to the new state
         Animator workspaceAnim =  mStateTransitionAnimation.getAnimationToState(mState,
-                toState, toPage, animated, layerViews);
+                toState, animated, layerViews);
 
         // Update the current state
         mState = toState;
         updateAccessibilityFlags();
+        if (mState == State.OVERVIEW || mState == State.SPRING_LOADED) {
+            // Redraw pages, as we might want to draw pages which were not visible.
+            invalidate();
+        }
 
         return workspaceAnim;
     }
@@ -2304,15 +2313,17 @@
             icon.clearPressedBackground();
         }
 
-        if (child.getTag() == null || !(child.getTag() instanceof ItemInfo)) {
+        Object dragObject = child.getTag();
+        if (!(dragObject instanceof ItemInfo)) {
             String msg = "Drag started with a view that has no tag set. This "
                     + "will cause a crash (issue 11627249) down the line. "
                     + "View: " + child + "  tag: " + child.getTag();
             throw new IllegalStateException(msg);
         }
 
-        DragView dv = mDragController.startDrag(b, dragLayerX, dragLayerY, source, child.getTag(),
-                DragController.DRAG_ACTION_MOVE, dragVisualizeOffset, dragRect, scale, accessible);
+        DragView dv = mDragController.startDrag(b, dragLayerX, dragLayerY, source,
+                (ItemInfo) dragObject, DragController.DRAG_ACTION_MOVE, dragVisualizeOffset,
+                dragRect, scale, accessible);
         dv.setIntrinsicIconScaleFactor(source.getIntrinsicIconScaleFactor());
 
         if (child.getParent() instanceof ShortcutAndWidgetContainer) {
@@ -2352,7 +2363,8 @@
         Point dragVisualizeOffset = new Point(-padding.get() / 2, padding.get() / 2);
         Rect dragRect = new Rect(0, 0, iconSize, iconSize);
 
-        if (child.getTag() == null || !(child.getTag() instanceof ItemInfo)) {
+        Object dragObject = child.getTag();
+        if (!(dragObject instanceof ItemInfo)) {
             String msg = "Drag started with a view that has no tag set. This "
                     + "will cause a crash (issue 11627249) down the line. "
                     + "View: " + child + "  tag: " + child.getTag();
@@ -2360,8 +2372,9 @@
         }
 
         // Start the drag
-        DragView dv = mDragController.startDrag(b, dragLayerX, dragLayerY, source, child.getTag(),
-                DragController.DRAG_ACTION_MOVE, dragVisualizeOffset, dragRect, scale, false);
+        DragView dv = mDragController.startDrag(b, dragLayerX, dragLayerY, source,
+                (ItemInfo) dragObject, DragController.DRAG_ACTION_MOVE, dragVisualizeOffset,
+                dragRect, scale, false);
         dv.setIntrinsicIconScaleFactor(source.getIntrinsicIconScaleFactor());
 
         // Recycle temporary bitmaps
@@ -2402,9 +2415,8 @@
                 spanX = dragCellInfo.spanX;
                 spanY = dragCellInfo.spanY;
             } else {
-                final ItemInfo dragInfo = (ItemInfo) d.dragInfo;
-                spanX = dragInfo.spanX;
-                spanY = dragInfo.spanY;
+                spanX = d.dragInfo.spanX;
+                spanY = d.dragInfo.spanY;
             }
 
             int minSpanX = spanX;
@@ -2419,12 +2431,12 @@
                     mTargetCell);
             float distance = dropTargetLayout.getDistanceFromCell(mDragViewVisualCenter[0],
                     mDragViewVisualCenter[1], mTargetCell);
-            if (mCreateUserFolderOnDrop && willCreateUserFolder((ItemInfo) d.dragInfo,
+            if (mCreateUserFolderOnDrop && willCreateUserFolder(d.dragInfo,
                     dropTargetLayout, mTargetCell, distance, true)) {
                 return true;
             }
 
-            if (mAddToExistingFolderOnDrop && willAddToExistingUserFolder((ItemInfo) d.dragInfo,
+            if (mAddToExistingFolderOnDrop && willAddToExistingUserFolder(d.dragInfo,
                     dropTargetLayout, mTargetCell, distance)) {
                 return true;
             }
@@ -2490,7 +2502,7 @@
         return (aboveShortcut && willBecomeShortcut);
     }
 
-    boolean willAddToExistingUserFolder(Object dragInfo, CellLayout target, int[] targetCell,
+    boolean willAddToExistingUserFolder(ItemInfo dragInfo, CellLayout target, int[] targetCell,
             float distance) {
         if (distance > mMaxDistanceForFolderCreation) return false;
         View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
@@ -2603,7 +2615,7 @@
             }
         }
 
-        int snapScreen = WorkspaceStateTransitionAnimation.SCROLL_TO_CURRENT_PAGE;
+        int snapScreen = -1;
         boolean resizeOnDrop = false;
         if (d.dragSource != this) {
             final int[] touchXY = new int[] { (int) mDragViewVisualCenter[0],
@@ -2646,7 +2658,7 @@
 
                 // Aside from the special case where we're dropping a shortcut onto a shortcut,
                 // we need to find the nearest cell location that is vacant
-                ItemInfo item = (ItemInfo) d.dragInfo;
+                ItemInfo item = d.dragInfo;
                 int minSpanX = item.spanX;
                 int minSpanY = item.spanY;
                 if (item.minSpanX > 0 && item.minSpanY > 0) {
@@ -2684,7 +2696,7 @@
                         CellLayout parentCell = getParentCellLayoutForView(cell);
                         if (parentCell != null) {
                             parentCell.removeView(cell);
-                        } else if (LauncherAppState.isDogfoodBuild()) {
+                        } else if (ProviderConfig.IS_DOGFOOD_BUILD) {
                             throw new NullPointerException("mDragInfo.cell has null parent");
                         }
                         addInScreen(cell, container, screenId, mTargetCell[0], mTargetCell[1],
@@ -2764,9 +2776,7 @@
                     animateWidgetDrop(info, parent, d.dragView,
                             onCompleteRunnable, animationType, cell, false);
                 } else {
-                    int duration = snapScreen < 0 ?
-                            WorkspaceStateTransitionAnimation.SCROLL_TO_CURRENT_PAGE :
-                                    ADJACENT_SCREEN_DROP_DURATION;
+                    int duration = snapScreen < 0 ? -1 : ADJACENT_SCREEN_DROP_DURATION;
                     mLauncher.getDragLayer().animateViewIntoPosition(d.dragView, cell, duration,
                             onCompleteRunnable, this);
                 }
@@ -3020,30 +3030,21 @@
        xy[1] = xy[1] - v.getTop();
    }
 
-   boolean isPointInSelfOverHotseat(int x, int y, Rect r) {
-       if (r == null) {
-           r = new Rect();
-       }
-       mTempPt[0] = x;
-       mTempPt[1] = y;
-       mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, mTempPt, true);
-
-       DeviceProfile grid = mLauncher.getDeviceProfile();
-       r = grid.getHotseatRect();
-       if (r.contains(mTempPt[0], mTempPt[1])) {
-           return true;
-       }
-       return false;
+   boolean isPointInSelfOverHotseat(int x, int y) {
+       mTempXY[0] = x;
+       mTempXY[1] = y;
+       mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, mTempXY, true);
+       return mLauncher.getDeviceProfile().isInHotseatRect(mTempXY[0], mTempXY[1]);
    }
 
    void mapPointFromSelfToHotseatLayout(Hotseat hotseat, float[] xy) {
-       mTempPt[0] = (int) xy[0];
-       mTempPt[1] = (int) xy[1];
-       mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, mTempPt, true);
-       mLauncher.getDragLayer().mapCoordInSelfToDescendent(hotseat.getLayout(), mTempPt);
+       mTempXY[0] = (int) xy[0];
+       mTempXY[1] = (int) xy[1];
+       mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, mTempXY, true);
+       mLauncher.getDragLayer().mapCoordInSelfToDescendent(hotseat.getLayout(), mTempXY);
 
-       xy[0] = mTempPt[0];
-       xy[1] = mTempPt[1];
+       xy[0] = mTempXY[0];
+       xy[1] = mTempXY[1];
    }
 
    /*
@@ -3091,8 +3092,8 @@
             final float[] touchXy = {originX, originY};
             // Transform the touch coordinates to the CellLayout's local coordinates
             // If the touch point is within the bounds of the cell layout, we can return immediately
-            cl.getMatrix().invert(mTempInverseMatrix);
-            mapPointFromSelfToChild(cl, touchXy, mTempInverseMatrix);
+            cl.getMatrix().invert(sTmpInvMatrix);
+            mapPointFromSelfToChild(cl, touchXy, sTmpInvMatrix);
 
             if (touchXy[0] >= 0 && touchXy[0] <= cl.getWidth() &&
                     touchXy[1] >= 0 && touchXy[1] <= cl.getHeight()) {
@@ -3134,11 +3135,10 @@
         // Skip drag over events while we are dragging over side pages
         if (mInScrollArea || !transitionStateShouldAllowDrop()) return;
 
-        Rect r = new Rect();
         CellLayout layout = null;
-        ItemInfo item = (ItemInfo) d.dragInfo;
+        ItemInfo item = d.dragInfo;
         if (item == null) {
-            if (LauncherAppState.isDogfoodBuild()) {
+            if (ProviderConfig.IS_DOGFOOD_BUILD) {
                 throw new NullPointerException("DragObject has null info");
             }
             return;
@@ -3152,7 +3152,7 @@
         // Identify whether we have dragged over a side page
         if (workspaceInModalState()) {
             if (mLauncher.getHotseat() != null && !isExternalDragWidget(d)) {
-                if (isPointInSelfOverHotseat(d.x, d.y, r)) {
+                if (isPointInSelfOverHotseat(d.x, d.y)) {
                     layout = mLauncher.getHotseat().getLayout();
                 }
             }
@@ -3175,7 +3175,7 @@
         } else {
             // Test to see if we are over the hotseat otherwise just use the current page
             if (mLauncher.getHotseat() != null && !isDragWidget(d)) {
-                if (isPointInSelfOverHotseat(d.x, d.y, r)) {
+                if (isPointInSelfOverHotseat(d.x, d.y)) {
                     layout = mLauncher.getHotseat().getLayout();
                 }
             }
@@ -3197,7 +3197,7 @@
                 mapPointFromSelfToChild(mDragTargetLayout, mDragViewVisualCenter, null);
             }
 
-            ItemInfo info = (ItemInfo) d.dragInfo;
+            ItemInfo info = d.dragInfo;
 
             int minSpanX = item.spanX;
             int minSpanY = item.spanY;
@@ -3377,24 +3377,6 @@
     }
 
     /**
-     * Add the item specified by dragInfo to the given layout.
-     * @return true if successful
-     */
-    public boolean addExternalItemToScreen(ItemInfo dragInfo, CellLayout layout) {
-        if (layout.findCellForSpan(mTempEstimate, dragInfo.spanX, dragInfo.spanY)) {
-            onDropExternal(dragInfo.dropPos, (ItemInfo) dragInfo, (CellLayout) layout, false);
-            return true;
-        }
-        mLauncher.showOutOfSpaceMessage(mLauncher.isHotseatLayout(layout));
-        return false;
-    }
-
-    private void onDropExternal(int[] touchXY, Object dragInfo,
-            CellLayout cellLayout, boolean insertAtFirst) {
-        onDropExternal(touchXY, dragInfo, cellLayout, insertAtFirst, null);
-    }
-
-    /**
      * Drop an item that didn't originate on one of the workspace screens.
      * It may have come from Launcher (e.g. from all apps or customize), or it may have
      * come from another app altogether.
@@ -3402,7 +3384,7 @@
      * NOTE: This can also be called when we are outside of a drag event, when we want
      * to add an item to one of the workspace screens.
      */
-    private void onDropExternal(final int[] touchXY, final Object dragInfo,
+    private void onDropExternal(final int[] touchXY, final ItemInfo dragInfo,
             final CellLayout cellLayout, boolean insertAtFirst, DragObject d) {
         final Runnable exitSpringLoadedRunnable = new Runnable() {
             @Override
@@ -3412,7 +3394,7 @@
             }
         };
 
-        ItemInfo info = (ItemInfo) dragInfo;
+        ItemInfo info = dragInfo;
         int spanX = info.spanX;
         int spanY = info.spanY;
         if (mDragInfo != null) {
@@ -3439,14 +3421,14 @@
                         cellLayout, mTargetCell);
                 float distance = cellLayout.getDistanceFromCell(mDragViewVisualCenter[0],
                         mDragViewVisualCenter[1], mTargetCell);
-                if (willCreateUserFolder((ItemInfo) d.dragInfo, cellLayout, mTargetCell,
-                        distance, true) || willAddToExistingUserFolder((ItemInfo) d.dragInfo,
-                                cellLayout, mTargetCell, distance)) {
+                if (willCreateUserFolder(d.dragInfo, cellLayout, mTargetCell, distance, true)
+                        || willAddToExistingUserFolder(
+                                d.dragInfo, cellLayout, mTargetCell, distance)) {
                     findNearestVacantCell = false;
                 }
             }
 
-            final ItemInfo item = (ItemInfo) d.dragInfo;
+            final ItemInfo item = d.dragInfo;
             boolean updateWidgetSize = false;
             if (findNearestVacantCell) {
                 int minSpanX = item.spanX;
@@ -3764,7 +3746,7 @@
                     mDragInfo.container, mDragInfo.screenId);
             if (cellLayout != null) {
                 cellLayout.onDropChild(mDragInfo.cell);
-            } else if (LauncherAppState.isDogfoodBuild()) {
+            } else if (ProviderConfig.IS_DOGFOOD_BUILD) {
                 throw new RuntimeException("Invalid state: cellLayout == null in "
                         + "Workspace#onDropCompleted. Please file a bug. ");
             };
@@ -3784,7 +3766,7 @@
         CellLayout parentCell = getParentCellLayoutForView(v);
         if (parentCell != null) {
             parentCell.removeView(v);
-        } else if (LauncherAppState.isDogfoodBuild()) {
+        } else if (ProviderConfig.IS_DOGFOOD_BUILD) {
             // When an app is uninstalled using the drop target, we wait until resume to remove
             // the icon. We also remove all the corresponding items from the workspace at
             // {@link Launcher#bindComponentsRemoved}. That call can come before or after
@@ -3811,29 +3793,6 @@
         }
     }
 
-    void updateItemLocationsInDatabase(CellLayout cl) {
-        int count = cl.getShortcutsAndWidgets().getChildCount();
-
-        long screenId = getIdForScreen(cl);
-        int container = Favorites.CONTAINER_DESKTOP;
-
-        if (mLauncher.isHotseatLayout(cl)) {
-            screenId = -1;
-            container = Favorites.CONTAINER_HOTSEAT;
-        }
-
-        for (int i = 0; i < count; i++) {
-            View v = cl.getShortcutsAndWidgets().getChildAt(i);
-            ItemInfo info = (ItemInfo) v.getTag();
-            // Null check required as the AllApps button doesn't have an item info
-            if (info != null && info.requiresDbUpdate) {
-                info.requiresDbUpdate = false;
-                LauncherModel.modifyItemInDatabase(mLauncher, info, container, screenId, info.cellX,
-                        info.cellY, info.spanX, info.spanY);
-            }
-        }
-    }
-
     void saveWorkspaceToDb() {
         saveWorkspaceScreenToDb((CellLayout) mLauncher.getHotseat().getLayout());
         int count = getChildCount();
diff --git a/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java b/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java
index 54f63bb..f097585 100644
--- a/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java
+++ b/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java
@@ -174,7 +174,6 @@
 
     public static final String TAG = "WorkspaceStateTransitionAnimation";
 
-    public static final int SCROLL_TO_CURRENT_PAGE = -1;
     @Thunk static final int BACKGROUND_FADE_OUT_DURATION = 350;
 
     final @Thunk Launcher mLauncher;
@@ -217,14 +216,18 @@
         mWorkspaceFadeInAdjacentScreens = grid.shouldFadeAdjacentWorkspaceScreens();
     }
 
+    public void snapToPageFromOverView(int whichPage) {
+        mWorkspace.snapToPage(whichPage, mOverviewTransitionTime, mZoomInInterpolator);
+    }
+
     public AnimatorSet getAnimationToState(Workspace.State fromState, Workspace.State toState,
-            int toPage, boolean animated, HashMap<View, Integer> layerViews) {
+            boolean animated, HashMap<View, Integer> layerViews) {
         AccessibilityManager am = (AccessibilityManager)
                 mLauncher.getSystemService(Context.ACCESSIBILITY_SERVICE);
         final boolean accessibilityEnabled = am.isEnabled();
         TransitionStates states = new TransitionStates(fromState, toState);
         int workspaceDuration = getAnimationDuration(states);
-        animateWorkspace(states, toPage, animated, workspaceDuration, layerViews,
+        animateWorkspace(states, animated, workspaceDuration, layerViews,
                 accessibilityEnabled);
         animateBackgroundGradient(states, animated, BACKGROUND_FADE_OUT_DURATION);
         return mStateAnimator;
@@ -263,7 +266,7 @@
     /**
      * Starts a transition animation for the workspace.
      */
-    private void animateWorkspace(final TransitionStates states, int toPage, final boolean animated,
+    private void animateWorkspace(final TransitionStates states, final boolean animated,
                                   final int duration, final HashMap<View, Integer> layerViews,
                                   final boolean accessibilityEnabled) {
         // Reinitialize animation arrays for the current workspace state
@@ -303,11 +306,7 @@
             }
         }
 
-        if (toPage == SCROLL_TO_CURRENT_PAGE) {
-            toPage = mWorkspace.getPageNearestToCenterOfScreen();
-        }
-        mWorkspace.snapToPage(toPage, duration, mZoomInInterpolator);
-
+        int toPage = mWorkspace.getPageNearestToCenterOfScreen();
         for (int i = 0; i < childCount; i++) {
             final CellLayout cl = (CellLayout) mWorkspace.getChildAt(i);
             boolean isCurrentPage = (i == toPage);
@@ -379,7 +378,6 @@
                             mNewBackgroundAlphas[i] != 0) {
                         ValueAnimator bgAnim = ObjectAnimator.ofFloat(cl, "backgroundAlpha",
                                 mOldBackgroundAlphas[i], mNewBackgroundAlphas[i]);
-                                LauncherAnimUtils.ofFloat(cl, 0f, 1f);
                         bgAnim.setInterpolator(mZoomInInterpolator);
                         bgAnim.setDuration(duration);
                         mStateAnimator.play(bgAnim);
@@ -488,8 +486,7 @@
             if (animated) {
                 // These properties refer to the background protection gradient used for AllApps
                 // and Widget tray.
-                ValueAnimator bgFadeOutAnimation =
-                        LauncherAnimUtils.ofFloat(mWorkspace, startAlpha, finalAlpha);
+                ValueAnimator bgFadeOutAnimation = ValueAnimator.ofFloat(startAlpha, finalAlpha);
                 bgFadeOutAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                     @Override
                     public void onAnimationUpdate(ValueAnimator animation) {
diff --git a/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java b/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java
index fe7b25e..c11aab9 100644
--- a/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java
+++ b/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java
@@ -375,7 +375,7 @@
 
 
     @Override
-    public void onDragStart(DragSource source, Object info, int dragAction) {
+    public void onDragStart(DragSource source, ItemInfo info, int dragAction) {
         // No-op
     }
 
diff --git a/src/com/android/launcher3/allapps/AllAppsContainerView.java b/src/com/android/launcher3/allapps/AllAppsContainerView.java
index e129dc6..f5e06c5 100644
--- a/src/com/android/launcher3/allapps/AllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsContainerView.java
@@ -523,7 +523,7 @@
                 int currentScreen = mLauncher.getCurrentWorkspaceScreen();
                 Workspace workspace = (Workspace) target;
                 CellLayout layout = (CellLayout) workspace.getChildAt(currentScreen);
-                ItemInfo itemInfo = (ItemInfo) d.dragInfo;
+                ItemInfo itemInfo = d.dragInfo;
                 if (layout != null) {
                     showOutOfSpaceMessage =
                             !layout.findCellForSpan(null, itemInfo.spanX, itemInfo.spanY);
diff --git a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
index 396f757..ffe39cd 100644
--- a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
+++ b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
@@ -18,11 +18,12 @@
 import android.content.Context;
 import android.support.v7.widget.RecyclerView;
 import android.util.Log;
+
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.Launcher;
-import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.compat.AlphabeticIndexCompat;
 import com.android.launcher3.compat.UserHandleCompat;
+import com.android.launcher3.config.ProviderConfig;
 import com.android.launcher3.model.AppNameComparator;
 import com.android.launcher3.util.ComponentKey;
 
@@ -422,7 +423,7 @@
                 if (info != null) {
                     mPredictedApps.add(info);
                 } else {
-                    if (LauncherAppState.isDogfoodBuild()) {
+                    if (ProviderConfig.IS_DOGFOOD_BUILD) {
                         Log.e(TAG, "Predicted app not found: " + ck.flattenToString(mLauncher));
                     }
                 }
diff --git a/src/com/android/launcher3/compat/AlphabeticIndexCompat.java b/src/com/android/launcher3/compat/AlphabeticIndexCompat.java
index ec1fb66..463278a 100644
--- a/src/com/android/launcher3/compat/AlphabeticIndexCompat.java
+++ b/src/com/android/launcher3/compat/AlphabeticIndexCompat.java
@@ -1,6 +1,7 @@
 package com.android.launcher3.compat;
 
 import android.content.Context;
+
 import com.android.launcher3.Utilities;
 
 import java.lang.reflect.Constructor;
@@ -62,6 +63,7 @@
     private boolean mHasValidAlphabeticIndex;
     private String mDefaultMiscLabel;
 
+    @SuppressWarnings({"unchecked", "rawtypes"})
     public AlphabeticIndexCompat(Context context) {
         super();
         try {
diff --git a/src/com/android/launcher3/config/ProviderConfig.java b/src/com/android/launcher3/config/ProviderConfig.java
index e8930d0..825b434 100644
--- a/src/com/android/launcher3/config/ProviderConfig.java
+++ b/src/com/android/launcher3/config/ProviderConfig.java
@@ -19,4 +19,6 @@
 public class ProviderConfig {
 
     public static final String AUTHORITY = "com.android.launcher3.settings".intern();
+
+    public static boolean IS_DOGFOOD_BUILD = false;
 }
diff --git a/src/com/android/launcher3/model/PackageItemInfo.java b/src/com/android/launcher3/model/PackageItemInfo.java
index 30f228c..ddc9cbf 100644
--- a/src/com/android/launcher3/model/PackageItemInfo.java
+++ b/src/com/android/launcher3/model/PackageItemInfo.java
@@ -20,8 +20,6 @@
 
 import com.android.launcher3.ItemInfo;
 
-import java.util.Arrays;
-
 /**
  * Represents a {@link Package} in the widget tray section.
  */
@@ -59,7 +57,6 @@
         return "PackageItemInfo(title=" + title + " id=" + this.id
                 + " type=" + this.itemType + " container=" + this.container
                 + " screen=" + screenId + " cellX=" + cellX + " cellY=" + cellY
-                + " spanX=" + spanX + " spanY=" + spanY + " dropPos=" + Arrays.toString(dropPos)
-                + " user=" + user + ")";
+                + " spanX=" + spanX + " spanY=" + spanY + " user=" + user + ")";
     }
 }
diff --git a/src/com/android/launcher3/testing/LauncherExtension.java b/src/com/android/launcher3/testing/LauncherExtension.java
index 8702877..b4d7459 100644
--- a/src/com/android/launcher3/testing/LauncherExtension.java
+++ b/src/com/android/launcher3/testing/LauncherExtension.java
@@ -335,7 +335,8 @@
             @Override
             public void onScrollInteractionEnd() {
                 if (mProgress > 25 && mLauncherOverlayCallbacks.enterFullImmersion()) {
-                    ObjectAnimator oa = LauncherAnimUtils.ofFloat(mSearchOverlay, "translationX", 0);
+                    ObjectAnimator oa = LauncherAnimUtils.ofFloat(
+                            mSearchOverlay, View.TRANSLATION_X, 0);
                     oa.addListener(new AnimatorListenerAdapter() {
                         @Override
                         public void onAnimationEnd(Animator arg0) {
diff --git a/src/com/android/launcher3/widget/WidgetHostViewLoader.java b/src/com/android/launcher3/widget/WidgetHostViewLoader.java
index 30b3d58..bdd117c 100644
--- a/src/com/android/launcher3/widget/WidgetHostViewLoader.java
+++ b/src/com/android/launcher3/widget/WidgetHostViewLoader.java
@@ -13,6 +13,7 @@
 import com.android.launcher3.DragController.DragListener;
 import com.android.launcher3.DragLayer;
 import com.android.launcher3.DragSource;
+import com.android.launcher3.ItemInfo;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherAppWidgetProviderInfo;
 import com.android.launcher3.compat.AppWidgetManagerCompat;
@@ -43,7 +44,7 @@
     }
 
     @Override
-    public void onDragStart(DragSource source, Object info, int dragAction) { }
+    public void onDragStart(DragSource source, ItemInfo info, int dragAction) { }
 
     @Override
     public void onDragEnd() {
diff --git a/src/com/android/launcher3/widget/WidgetsContainerView.java b/src/com/android/launcher3/widget/WidgetsContainerView.java
index 0c6ea31..fd6d28b 100644
--- a/src/com/android/launcher3/widget/WidgetsContainerView.java
+++ b/src/com/android/launcher3/widget/WidgetsContainerView.java
@@ -317,7 +317,7 @@
                 int currentScreen = mLauncher.getCurrentWorkspaceScreen();
                 Workspace workspace = (Workspace) target;
                 CellLayout layout = (CellLayout) workspace.getChildAt(currentScreen);
-                ItemInfo itemInfo = (ItemInfo) d.dragInfo;
+                ItemInfo itemInfo = d.dragInfo;
                 if (layout != null) {
                     showOutOfSpaceMessage =
                             !layout.findCellForSpan(null, itemInfo.spanX, itemInfo.spanY);