diff --git a/res/layout/widgets_list_row_view.xml b/res/layout/widgets_list_row_view.xml
index b6e0a0b..1062269 100644
--- a/res/layout/widgets_list_row_view.xml
+++ b/res/layout/widgets_list_row_view.xml
@@ -41,6 +41,7 @@
         android:singleLine="true"
         android:textColor="?android:attr/textColorPrimary"
         android:textSize="16sp"
+        android:textAlignment="viewStart"
         launcher:customShadows="false"
         launcher:deferShadowGeneration="true"
         launcher:iconDisplay="widget_section"
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index c2c5c27..d0d33a0 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -35,6 +35,7 @@
 import android.os.Parcelable;
 import android.support.annotation.IntDef;
 import android.support.v4.view.ViewCompat;
+import android.util.ArrayMap;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.SparseArray;
@@ -44,7 +45,6 @@
 import android.view.ViewGroup;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.animation.DecelerateInterpolator;
-
 import com.android.launcher3.BubbleTextView.BubbleTextShadowHandler;
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.accessibility.DragAndDropAccessibilityDelegate;
@@ -59,14 +59,12 @@
 import com.android.launcher3.util.ParcelableSparseArray;
 import com.android.launcher3.util.Themes;
 import com.android.launcher3.util.Thunk;
-
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.Comparator;
-import java.util.HashMap;
 import java.util.Stack;
 
 public class CellLayout extends ViewGroup implements BubbleTextShadowHandler {
@@ -76,7 +74,7 @@
     private static final String TAG = "CellLayout";
     private static final boolean LOGD = false;
 
-    private Launcher mLauncher;
+    private final Launcher mLauncher;
     @ViewDebug.ExportedProperty(category = "launcher")
     @Thunk int mCellWidth;
     @ViewDebug.ExportedProperty(category = "launcher")
@@ -102,10 +100,10 @@
     private GridOccupancy mTmpOccupied;
 
     private OnTouchListener mInterceptTouchListener;
-    private StylusEventHelper mStylusEventHelper;
+    private final StylusEventHelper mStylusEventHelper;
 
-    private ArrayList<FolderIcon.PreviewBackground> mFolderBackgrounds = new ArrayList<FolderIcon.PreviewBackground>();
-    FolderIcon.PreviewBackground mFolderLeaveBehind = new FolderIcon.PreviewBackground();
+    private final ArrayList<FolderIcon.PreviewBackground> mFolderBackgrounds = new ArrayList<>();
+    final FolderIcon.PreviewBackground mFolderLeaveBehind = new FolderIcon.PreviewBackground();
 
     private float mBackgroundAlpha;
 
@@ -122,9 +120,9 @@
 
     // These arrays are used to implement the drag visualization on x-large screens.
     // They are used as circular arrays, indexed by mDragOutlineCurrent.
-    @Thunk Rect[] mDragOutlines = new Rect[4];
-    @Thunk float[] mDragOutlineAlphas = new float[mDragOutlines.length];
-    private InterruptibleInOutAnimator[] mDragOutlineAnims =
+    @Thunk final Rect[] mDragOutlines = new Rect[4];
+    @Thunk final float[] mDragOutlineAlphas = new float[mDragOutlines.length];
+    private final InterruptibleInOutAnimator[] mDragOutlineAnims =
             new InterruptibleInOutAnimator[mDragOutlines.length];
 
     // Used as an index into the above 3 arrays; indicates which is the most current value.
@@ -133,8 +131,8 @@
 
     private final ClickShadowView mTouchFeedbackView;
 
-    @Thunk HashMap<CellLayout.LayoutParams, Animator> mReorderAnimators = new HashMap<>();
-    @Thunk HashMap<View, ReorderPreviewAnimation> mShakeAnimators = new HashMap<>();
+    @Thunk final ArrayMap<LayoutParams, Animator> mReorderAnimators = new ArrayMap<>();
+    @Thunk final ArrayMap<View, ReorderPreviewAnimation> mShakeAnimators = new ArrayMap<>();
 
     private boolean mItemPlacementDirty = false;
 
@@ -143,8 +141,8 @@
 
     private boolean mDragging = false;
 
-    private TimeInterpolator mEaseOutInterpolator;
-    private ShortcutAndWidgetContainer mShortcutsAndWidgets;
+    private final TimeInterpolator mEaseOutInterpolator;
+    private final ShortcutAndWidgetContainer mShortcutsAndWidgets;
 
     @Retention(RetentionPolicy.SOURCE)
     @IntDef({WORKSPACE, HOTSEAT, FOLDER})
@@ -169,10 +167,10 @@
     private static final int REORDER_ANIMATION_DURATION = 150;
     @Thunk final float mReorderPreviewAnimationMagnitude;
 
-    private ArrayList<View> mIntersectingViews = new ArrayList<View>();
-    private Rect mOccupiedRect = new Rect();
-    private int[] mDirectionVector = new int[2];
-    int[] mPreviousReorderDirection = new int[2];
+    private final ArrayList<View> mIntersectingViews = new ArrayList<>();
+    private final Rect mOccupiedRect = new Rect();
+    private final int[] mDirectionVector = new int[2];
+    final int[] mPreviousReorderDirection = new int[2];
     private static final int INVALID_DIRECTION = -100;
 
     private final Rect mTempRect = new Rect();
@@ -1100,7 +1098,7 @@
                 result, resultSpan);
     }
 
-    private final Stack<Rect> mTempRectStack = new Stack<Rect>();
+    private final Stack<Rect> mTempRectStack = new Stack<>();
     private void lazyInitTempRectStack() {
         if (mTempRectStack.isEmpty()) {
             for (int i = 0; i < mCountX * mCountY; i++) {
@@ -1145,7 +1143,7 @@
         final int[] bestXY = result != null ? result : new int[2];
         double bestDistance = Double.MAX_VALUE;
         final Rect bestRect = new Rect(-1, -1, -1, -1);
-        final Stack<Rect> validRegions = new Stack<Rect>();
+        final Stack<Rect> validRegions = new Stack<>();
 
         final int countX = mCountX;
         final int countY = mCountY;
@@ -1347,14 +1345,14 @@
         final static int RIGHT = 1 << 2;
         final static int BOTTOM = 1 << 3;
 
-        ArrayList<View> views;
-        ItemConfiguration config;
-        Rect boundingRect = new Rect();
+        final ArrayList<View> views;
+        final ItemConfiguration config;
+        final Rect boundingRect = new Rect();
 
-        int[] leftEdge = new int[mCountY];
-        int[] rightEdge = new int[mCountY];
-        int[] topEdge = new int[mCountX];
-        int[] bottomEdge = new int[mCountX];
+        final int[] leftEdge = new int[mCountY];
+        final int[] rightEdge = new int[mCountY];
+        final int[] topEdge = new int[mCountX];
+        final int[] bottomEdge = new int[mCountX];
         int dirtyEdges;
         boolean boundingRectDirty;
 
@@ -1494,7 +1492,7 @@
             return boundingRect;
         }
 
-        PositionComparator comparator = new PositionComparator();
+        final PositionComparator comparator = new PositionComparator();
         class PositionComparator implements Comparator<View> {
             int whichEdge = 0;
             public int compare(View left, View right) {
@@ -1794,7 +1792,7 @@
             }
         }
 
-        solution.intersectingViews = new ArrayList<View>(mIntersectingViews);
+        solution.intersectingViews = new ArrayList<>(mIntersectingViews);
 
         // First we try to find a solution which respects the push mechanic. That is,
         // we try to find a solution such that no displaced item travels through another item
@@ -1850,7 +1848,7 @@
         int result[] = new int[2];
         result = findNearestArea(pixelX, pixelY, spanX, spanY, result);
 
-        boolean success = false;
+        boolean success;
         // First we try the exact nearest position of the item being dragged,
         // we will then want to try to move this around to other neighbouring positions
         success = rearrangementExists(result[0], result[1], spanX, spanY, direction, dragView,
@@ -1958,14 +1956,14 @@
     // Class which represents the reorder preview animations. These animations show that an item is
     // in a temporary state, and hint at where the item will return to.
     class ReorderPreviewAnimation {
-        View child;
+        final View child;
         float finalDeltaX;
         float finalDeltaY;
         float initDeltaX;
         float initDeltaY;
-        float finalScale;
+        final float finalScale;
         float initScale;
-        int mode;
+        final int mode;
         boolean repeating = false;
         private static final int PREVIEW_DURATION = 300;
         private static final int HINT_DURATION = Workspace.REORDER_TIMEOUT;
@@ -2415,9 +2413,9 @@
     }
 
     private static class ItemConfiguration extends CellAndSpan {
-        HashMap<View, CellAndSpan> map = new HashMap<View, CellAndSpan>();
-        private HashMap<View, CellAndSpan> savedMap = new HashMap<View, CellAndSpan>();
-        ArrayList<View> sortedViews = new ArrayList<View>();
+        final ArrayMap<View, CellAndSpan> map = new ArrayMap<>();
+        private final ArrayMap<View, CellAndSpan> savedMap = new ArrayMap<>();
+        final ArrayList<View> sortedViews = new ArrayList<>();
         ArrayList<View> intersectingViews;
         boolean isSolution = false;
 
@@ -2467,7 +2465,6 @@
      * @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 ignoreView Considers space occupied by this view as unoccupied
      * @param result Previously returned value to possibly recycle.
      * @return The X, Y cell of a vacant area that can contain this object,
      *         nearest the requested location.
@@ -2779,9 +2776,9 @@
     //    cellX and cellY coordinates and which page was clicked. We then set this as a tag on
     //    the CellLayout that was long clicked
     public static final class CellInfo extends CellAndSpan {
-        public View cell;
-        long screenId;
-        long container;
+        public final View cell;
+        final long screenId;
+        final long container;
 
         public CellInfo(View v, ItemInfo info) {
             cellX = info.cellX;
diff --git a/src/com/android/launcher3/allapps/search/AllAppsSearchBarController.java b/src/com/android/launcher3/allapps/search/AllAppsSearchBarController.java
index 547d9e1..63aa7be 100644
--- a/src/com/android/launcher3/allapps/search/AllAppsSearchBarController.java
+++ b/src/com/android/launcher3/allapps/search/AllAppsSearchBarController.java
@@ -31,7 +31,6 @@
 import com.android.launcher3.ExtendedEditText;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.Utilities;
-import com.android.launcher3.allapps.AlphabeticalAppsList;
 import com.android.launcher3.discovery.AppDiscoveryItem;
 import com.android.launcher3.discovery.AppDiscoveryUpdateState;
 import com.android.launcher3.util.ComponentKey;
@@ -46,12 +45,11 @@
         implements TextWatcher, OnEditorActionListener, ExtendedEditText.OnBackKeyListener {
 
     protected Launcher mLauncher;
-    protected AlphabeticalAppsList mApps;
     protected Callbacks mCb;
     protected ExtendedEditText mInput;
     protected String mQuery;
 
-    protected DefaultAppSearchAlgorithm mSearchAlgorithm;
+    protected SearchAlgorithm mSearchAlgorithm;
     protected InputMethodManager mInputMethodManager;
 
     public void setVisibility(int visibility) {
@@ -61,9 +59,8 @@
      * Sets the references to the apps model and the search result callback.
      */
     public final void initialize(
-            AlphabeticalAppsList apps, ExtendedEditText input,
+            SearchAlgorithm searchAlgorithm, ExtendedEditText input,
             Launcher launcher, Callbacks cb) {
-        mApps = apps;
         mCb = cb;
         mLauncher = launcher;
 
@@ -75,22 +72,7 @@
         mInputMethodManager = (InputMethodManager)
                 mInput.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
 
-        mSearchAlgorithm = onInitializeSearch();
-
-        onInitialized();
-    }
-
-    /**
-     * You can override this method to perform custom initialization.
-     */
-    protected void onInitialized() {
-    }
-
-    /**
-     * This method will get called when the controller is set.
-     */
-    public DefaultAppSearchAlgorithm onInitializeSearch() {
-        return new DefaultAppSearchAlgorithm(mApps.getApps());
+        mSearchAlgorithm = searchAlgorithm;
     }
 
     @Override
diff --git a/src/com/android/launcher3/allapps/search/AppsSearchContainerLayout.java b/src/com/android/launcher3/allapps/search/AppsSearchContainerLayout.java
index 126a02c..cb3b066 100644
--- a/src/com/android/launcher3/allapps/search/AppsSearchContainerLayout.java
+++ b/src/com/android/launcher3/allapps/search/AppsSearchContainerLayout.java
@@ -118,8 +118,8 @@
         mAppsRecyclerView = recyclerView;
         mAppsRecyclerView.addOnScrollListener(mElevationController);
         mAdapter = (AllAppsGridAdapter) mAppsRecyclerView.getAdapter();
-
-        mSearchBarController.initialize(appsList, mSearchInput, mLauncher, this);
+        mSearchBarController.initialize(
+                new DefaultAppSearchAlgorithm(appsList.getApps()), mSearchInput, mLauncher, this);
     }
 
     @Override
diff --git a/src/com/android/launcher3/allapps/search/DefaultAppSearchAlgorithm.java b/src/com/android/launcher3/allapps/search/DefaultAppSearchAlgorithm.java
index 06097d0..8a0fd46 100644
--- a/src/com/android/launcher3/allapps/search/DefaultAppSearchAlgorithm.java
+++ b/src/com/android/launcher3/allapps/search/DefaultAppSearchAlgorithm.java
@@ -26,7 +26,7 @@
 /**
  * The default search implementation.
  */
-public class DefaultAppSearchAlgorithm {
+public class DefaultAppSearchAlgorithm implements SearchAlgorithm {
 
     private final List<AppInfo> mApps;
     protected final Handler mResultHandler;
@@ -36,12 +36,14 @@
         mResultHandler = new Handler();
     }
 
+    @Override
     public void cancel(boolean interruptActiveRequests) {
         if (interruptActiveRequests) {
             mResultHandler.removeCallbacksAndMessages(null);
         }
     }
 
+    @Override
     public void doSearch(final String query,
             final AllAppsSearchBarController.Callbacks callback) {
         final ArrayList<ComponentKey> result = getTitleMatchResult(query);
@@ -54,7 +56,7 @@
         });
     }
 
-    public ArrayList<ComponentKey> getTitleMatchResult(String query) {
+    private ArrayList<ComponentKey> getTitleMatchResult(String query) {
         // Do an intersection of the words in the query and each title, and filter out all the
         // apps that don't match all of the words in the query.
         final String queryTextLower = query.toLowerCase();
@@ -67,7 +69,7 @@
         return result;
     }
 
-    public boolean matches(AppInfo info, String query) {
+    public static boolean matches(AppInfo info, String query) {
         int queryLength = query.length();
 
         String title = info.title.toString();
@@ -103,7 +105,7 @@
      *      3) Any capital character after a digit or small character
      *      4) Any capital character before a small character
      */
-    protected boolean isBreak(int thisType, int prevType, int nextType) {
+    private static boolean isBreak(int thisType, int prevType, int nextType) {
         switch (thisType) {
             case Character.UPPERCASE_LETTER:
                 if (nextType == Character.UPPERCASE_LETTER) {
diff --git a/src/com/android/launcher3/allapps/search/SearchAlgorithm.java b/src/com/android/launcher3/allapps/search/SearchAlgorithm.java
new file mode 100644
index 0000000..c409b1c
--- /dev/null
+++ b/src/com/android/launcher3/allapps/search/SearchAlgorithm.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.allapps.search;
+
+/**
+ * An interface for handling search.
+ */
+public interface SearchAlgorithm {
+
+    /**
+     * Performs search and sends the result to the callback.
+     */
+    void doSearch(String query, AllAppsSearchBarController.Callbacks callback);
+
+    /**
+     * Cancels any active request.
+     */
+    void cancel(boolean interruptActiveRequests);
+}
diff --git a/src/com/android/launcher3/graphics/DrawableFactory.java b/src/com/android/launcher3/graphics/DrawableFactory.java
index 60bbce4..45344c0 100644
--- a/src/com/android/launcher3/graphics/DrawableFactory.java
+++ b/src/com/android/launcher3/graphics/DrawableFactory.java
@@ -28,16 +28,14 @@
 import android.os.Process;
 import android.os.UserHandle;
 import android.support.annotation.UiThread;
+import android.util.ArrayMap;
 import android.util.Log;
-
 import com.android.launcher3.FastBitmapDrawable;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.allapps.AllAppsBackgroundDrawable;
 
-import java.util.HashMap;
-
 /**
  * Factory for creating new drawables.
  */
@@ -61,7 +59,7 @@
     }
 
     protected final UserHandle mMyUser = Process.myUserHandle();
-    protected final HashMap<UserHandle, Bitmap> mUserBadges = new HashMap<>();
+    protected final ArrayMap<UserHandle, Bitmap> mUserBadges = new ArrayMap<>();
 
     /**
      * Returns a FastBitmapDrawable with the icon.
diff --git a/src/com/android/launcher3/model/GridSizeMigrationTask.java b/src/com/android/launcher3/model/GridSizeMigrationTask.java
index 221798b..8de0de0 100644
--- a/src/com/android/launcher3/model/GridSizeMigrationTask.java
+++ b/src/com/android/launcher3/model/GridSizeMigrationTask.java
@@ -13,7 +13,6 @@
 import android.net.Uri;
 import android.text.TextUtils;
 import android.util.Log;
-
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.LauncherAppState;
@@ -29,10 +28,8 @@
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.util.GridOccupancy;
 import com.android.launcher3.util.LongArrayMap;
-
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Locale;
 
@@ -61,7 +58,6 @@
     private final Context mContext;
     private final InvariantDeviceProfile mIdp;
 
-    private final HashMap<String, Point> mWidgetMinSize = new HashMap<>();
     private final ContentValues mTempValues = new ContentValues();
     protected final ArrayList<Long> mEntryToRemove = new ArrayList<>();
     private final ArrayList<ContentProviderOperation> mUpdateOperations = new ArrayList<>();
@@ -728,8 +724,10 @@
                         int widgetId = c.getInt(indexAppWidgetId);
                         LauncherAppWidgetProviderInfo pInfo = AppWidgetManagerCompat.getInstance(
                                 mContext).getLauncherAppWidgetInfo(widgetId);
-                        Point spans = pInfo == null ?
-                                mWidgetMinSize.get(provider) : pInfo.getMinSpans(mIdp, mContext);
+                        Point spans = null;
+                        if (pInfo != null) {
+                            spans = pInfo.getMinSpans(mIdp, mContext);
+                        }
                         if (spans != null) {
                             entry.minSpanX = spans.x > 0 ? spans.x : entry.spanX;
                             entry.minSpanY = spans.y > 0 ? spans.y : entry.spanY;
@@ -865,7 +863,7 @@
     }
 
     private static ArrayList<DbEntry> deepCopy(ArrayList<DbEntry> src) {
-        ArrayList<DbEntry> dup = new ArrayList<DbEntry>(src.size());
+        ArrayList<DbEntry> dup = new ArrayList<>(src.size());
         for (DbEntry e : src) {
             dup.add(e.copy());
         }
@@ -909,7 +907,7 @@
         try {
             boolean dbChanged = false;
 
-            HashSet validPackages = getValidPackages(context);
+            HashSet<String> validPackages = getValidPackages(context);
             // Hotseat
             int srcHotseatCount = prefs.getInt(KEY_MIGRATION_SRC_HOTSEAT_COUNT, idp.numHotseatIcons);
             if (srcHotseatCount != idp.numHotseatIcons) {
@@ -962,7 +960,7 @@
         // this set is removed.
         // Since the loader removes such items anyway, removing these items here doesn't cause
         // any extra data loss and gives us more free space on the grid for better migration.
-        HashSet validPackages = new HashSet<>();
+        HashSet<String> validPackages = new HashSet<>();
         for (PackageInfo info : context.getPackageManager()
                 .getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES)) {
             validPackages.add(info.packageName);
diff --git a/src_flags/com/android/launcher3/config/FeatureFlags.java b/src_flags/com/android/launcher3/config/FeatureFlags.java
index ed169b6..40200c5 100644
--- a/src_flags/com/android/launcher3/config/FeatureFlags.java
+++ b/src_flags/com/android/launcher3/config/FeatureFlags.java
@@ -42,6 +42,8 @@
     public static boolean LAUNCHER3_GRADIENT_ALL_APPS = true;
     // When enabled allows use of physics based motions in the Launcher.
     public static boolean LAUNCHER3_PHYSICS = true;
+    // When enabled allows use of spring motions on the icons.
+    public static boolean LAUNCHER3_SPRING_ICONS = true;
 
     // Feature flag to enable moving the QSB on the 0th screen of the workspace.
     public static final boolean QSB_ON_FIRST_SCREEN = true;