diff --git a/src/com/android/launcher3/AppsContainerRecyclerView.java b/src/com/android/launcher3/AppsContainerRecyclerView.java
index 34e621a..d35f99d 100644
--- a/src/com/android/launcher3/AppsContainerRecyclerView.java
+++ b/src/com/android/launcher3/AppsContainerRecyclerView.java
@@ -292,8 +292,7 @@
         if (mFastScrollAlpha > 0f && !mFastScrollSectionName.isEmpty()) {
             int x;
             int y;
-            boolean isRtl = (getResources().getConfiguration().getLayoutDirection() ==
-                    LAYOUT_DIRECTION_RTL);
+            boolean isRtl = Utilities.isRtl(getResources());
 
             // Calculate the position for the fast scroller popup
             Rect bgBounds = mFastScrollerBg.getBounds();
@@ -411,8 +410,7 @@
         // Find the index and height of the first visible row (all rows have the same height)
         int x;
         int y;
-        boolean isRtl = (getResources().getConfiguration().getLayoutDirection() ==
-                LAYOUT_DIRECTION_RTL);
+        boolean isRtl = Utilities.isRtl(getResources());
         int rowCount = getNumRows();
         getCurScrollState(mScrollPosState, items);
         if (mScrollPosState.rowIndex != -1) {
diff --git a/src/com/android/launcher3/AppsContainerView.java b/src/com/android/launcher3/AppsContainerView.java
index a74670b..b752905 100644
--- a/src/com/android/launcher3/AppsContainerView.java
+++ b/src/com/android/launcher3/AppsContainerView.java
@@ -15,12 +15,15 @@
  */
 package com.android.launcher3;
 
+import android.annotation.SuppressLint;
+import android.annotation.TargetApi;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.graphics.drawable.InsetDrawable;
+import android.os.Build;
 import android.support.v7.widget.RecyclerView;
 import android.text.Editable;
 import android.text.TextWatcher;
@@ -198,8 +201,7 @@
 
     @Override
     protected void onFinishInflate() {
-        boolean isRtl = (getResources().getConfiguration().getLayoutDirection() ==
-                LAYOUT_DIRECTION_RTL);
+        boolean isRtl = Utilities.isRtl(getResources());
         mAdapter.setRtl(isRtl);
 
         // Work around the search box getting first focus and showing the cursor by
@@ -329,8 +331,7 @@
      */
     @Override
     protected void onUpdatePaddings() {
-        boolean isRtl = (getResources().getConfiguration().getLayoutDirection() ==
-                LAYOUT_DIRECTION_RTL);
+        boolean isRtl = Utilities.isRtl(getResources());
         boolean hasSearchBar = (mSearchBarEditView != null) &&
                 (mSearchBarEditView.getVisibility() == View.VISIBLE);
 
@@ -396,11 +397,13 @@
         return handleTouchEvent(ev);
     }
 
+    @SuppressLint("ClickableViewAccessibility")
     @Override
     public boolean onTouchEvent(MotionEvent ev) {
         return handleTouchEvent(ev);
     }
 
+    @SuppressLint("ClickableViewAccessibility")
     @Override
     public boolean onTouch(View v, MotionEvent ev) {
         switch (ev.getAction()) {
@@ -614,6 +617,7 @@
     /**
      * Updates the container when the recycler view is scrolled.
      */
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     private void onRecyclerViewScrolled() {
         if (DYNAMIC_HEADER_ELEVATION && Utilities.isLmpOrAbove()) {
             int elevation = DynamicGrid.pxFromDp(HEADER_ELEVATION_DP,
diff --git a/src/com/android/launcher3/BubbleTextView.java b/src/com/android/launcher3/BubbleTextView.java
index d32c919..bbcd893 100644
--- a/src/com/android/launcher3/BubbleTextView.java
+++ b/src/com/android/launcher3/BubbleTextView.java
@@ -16,6 +16,7 @@
 
 package com.android.launcher3;
 
+import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.content.res.Resources;
@@ -25,6 +26,7 @@
 import android.graphics.Canvas;
 import android.graphics.Region;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 import android.util.AttributeSet;
 import android.util.SparseArray;
 import android.util.TypedValue;
@@ -444,15 +446,20 @@
     /**
      * Sets the icon for this view based on the layout direction.
      */
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
     private Drawable setIcon(Drawable icon, int iconSize) {
         mIcon = icon;
         if (iconSize != -1) {
             mIcon.setBounds(0, 0, iconSize, iconSize);
         }
         if (mLayoutHorizontal) {
-            setCompoundDrawablesRelative(mIcon, null, null, null);
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
+                setCompoundDrawablesRelative(mIcon, null, null, null);
+            } else {
+                setCompoundDrawables(mIcon, null, null, null);
+            }
         } else {
-            setCompoundDrawablesRelative(null, mIcon, null, null);
+            setCompoundDrawables(null, mIcon, null, null);
         }
         return icon;
     }
diff --git a/src/com/android/launcher3/ButtonDropTarget.java b/src/com/android/launcher3/ButtonDropTarget.java
index 683c511..b8214d1 100644
--- a/src/com/android/launcher3/ButtonDropTarget.java
+++ b/src/com/android/launcher3/ButtonDropTarget.java
@@ -83,6 +83,7 @@
         }
     }
 
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
     protected void setDrawable(int resId) {
         // Get the hover color
         mDrawable = (TransitionDrawable) getCurrentDrawable();
@@ -90,7 +91,11 @@
         if (mDrawable == null) {
             // TODO: investigate why this is ever happening. Presently only on one known device.
             mDrawable = (TransitionDrawable) getResources().getDrawable(resId);
-            setCompoundDrawablesRelativeWithIntrinsicBounds(mDrawable, null, null, null);
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
+                setCompoundDrawablesRelativeWithIntrinsicBounds(mDrawable, null, null, null);
+            } else {
+                setCompoundDrawablesWithIntrinsicBounds(mDrawable, null, null, null);
+            }
         }
 
         if (null != mDrawable) {
@@ -107,7 +112,7 @@
     }
 
     protected Drawable getCurrentDrawable() {
-        Drawable[] drawables = getCompoundDrawablesRelative();
+        Drawable[] drawables = getCompoundDrawables();
         for (int i = 0; i < drawables.length; ++i) {
             if (drawables[i] != null) {
                 return drawables[i];
@@ -241,10 +246,6 @@
         outRect.offsetTo(coords[0], coords[1]);
     }
 
-    private boolean isRtl() {
-        return (getLayoutDirection() == LAYOUT_DIRECTION_RTL);
-    }
-
     protected Rect getIconRect(int viewWidth, int viewHeight, int drawableWidth, int drawableHeight) {
         DragLayer dragLayer = mLauncher.getDragLayer();
 
@@ -258,7 +259,7 @@
         final int left;
         final int right;
 
-        if (isRtl()) {
+        if (Utilities.isRtl(getResources())) {
             right = to.right - getPaddingRight();
             left = right - width;
         } else {
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 890b9c9..33c3d50 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -459,11 +459,7 @@
         isLandscape = (configuration.orientation == Configuration.ORIENTATION_LANDSCAPE);
         isTablet = resources.getBoolean(R.bool.is_tablet);
         isLargeTablet = resources.getBoolean(R.bool.is_large_tablet);
-        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
-            isLayoutRtl = (configuration.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL);
-        } else {
-            isLayoutRtl = false;
-        }
+        isLayoutRtl = Utilities.isRtl(resources);
         widthPx = wPx;
         heightPx = hPx;
         availableWidthPx = awPx;
diff --git a/src/com/android/launcher3/DragController.java b/src/com/android/launcher3/DragController.java
index 5fea9d8..f5c29ae 100644
--- a/src/com/android/launcher3/DragController.java
+++ b/src/com/android/launcher3/DragController.java
@@ -71,6 +71,7 @@
     // temporaries to avoid gc thrash
     private Rect mRectTemp = new Rect();
     private final int[] mCoordinatesTemp = new int[2];
+    private final boolean mIsRtl;
 
     /** Whether or not we're dragging. */
     private boolean mDragging;
@@ -157,6 +158,7 @@
         float density = r.getDisplayMetrics().density;
         mFlingToDeleteThresholdVelocity =
                 (int) (r.getInteger(R.integer.config_flingToDeleteMinVelocity) * density);
+        mIsRtl = Utilities.isRtl(r);
     }
 
     public boolean dragging() {
@@ -548,9 +550,8 @@
         final int slop = ViewConfiguration.get(mLauncher).getScaledWindowTouchSlop();
         final int delay = mDistanceSinceScroll < slop ? RESCROLL_DELAY : SCROLL_DELAY;
         final DragLayer dragLayer = mLauncher.getDragLayer();
-        final boolean isRtl = (dragLayer.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL);
-        final int forwardDirection = isRtl ? SCROLL_RIGHT : SCROLL_LEFT;
-        final int backwardsDirection = isRtl ? SCROLL_LEFT : SCROLL_RIGHT;
+        final int forwardDirection = mIsRtl ? SCROLL_RIGHT : SCROLL_LEFT;
+        final int backwardsDirection = mIsRtl ? SCROLL_LEFT : SCROLL_RIGHT;
 
         if (x < mScrollZone) {
             if (mScrollState == SCROLL_OUTSIDE_ZONE) {
diff --git a/src/com/android/launcher3/DragLayer.java b/src/com/android/launcher3/DragLayer.java
index 8ba25da..e25e615 100644
--- a/src/com/android/launcher3/DragLayer.java
+++ b/src/com/android/launcher3/DragLayer.java
@@ -60,6 +60,7 @@
     // Variables relating to resizing widgets
     private final ArrayList<AppWidgetResizeFrame> mResizeFrames =
             new ArrayList<AppWidgetResizeFrame>();
+    private final boolean mIsRtl;
     private AppWidgetResizeFrame mCurrentResizeFrame;
 
     // Variables relating to animation of views after drop
@@ -113,6 +114,7 @@
         mRightHoverDrawable = res.getDrawable(R.drawable.page_hover_right);
         mLeftHoverDrawableActive = res.getDrawable(R.drawable.page_hover_left_active);
         mRightHoverDrawableActive = res.getDrawable(R.drawable.page_hover_right_active);
+        mIsRtl = Utilities.isRtl(res);
     }
 
     public void setup(Launcher launcher, DragController controller) {
@@ -920,13 +922,6 @@
         invalidate();
     }
 
-    /**
-     * Note: this is a reimplementation of View.isLayoutRtl() since that is currently hidden api.
-     */
-    private boolean isLayoutRtl() {
-        return (getLayoutDirection() == LAYOUT_DIRECTION_RTL);
-    }
-
     @Override
     protected void dispatchDraw(Canvas canvas) {
         // Draw the background below children.
@@ -947,9 +942,8 @@
                     childRect);
 
             int page = workspace.getNextPage();
-            final boolean isRtl = isLayoutRtl();
-            CellLayout leftPage = (CellLayout) workspace.getChildAt(isRtl ? page + 1 : page - 1);
-            CellLayout rightPage = (CellLayout) workspace.getChildAt(isRtl ? page - 1 : page + 1);
+            CellLayout leftPage = (CellLayout) workspace.getChildAt(mIsRtl ? page + 1 : page - 1);
+            CellLayout rightPage = (CellLayout) workspace.getChildAt(mIsRtl ? page - 1 : page + 1);
 
             if (leftPage != null && leftPage.isDragTarget()) {
                 Drawable left = mInScrollArea && leftPage.getIsDragOverlapping() ?
diff --git a/src/com/android/launcher3/DragView.java b/src/com/android/launcher3/DragView.java
index 3eec3d9..120299e 100644
--- a/src/com/android/launcher3/DragView.java
+++ b/src/com/android/launcher3/DragView.java
@@ -76,6 +76,7 @@
      * @param registrationX The x coordinate of the registration point.
      * @param registrationY The y coordinate of the registration point.
      */
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     public DragView(Launcher launcher, Bitmap bitmap, int registrationX, int registrationY,
             int left, int top, int width, int height, final float initialScale) {
         super(launcher);
diff --git a/src/com/android/launcher3/Folder.java b/src/com/android/launcher3/Folder.java
index 6e5941c..131633c 100644
--- a/src/com/android/launcher3/Folder.java
+++ b/src/com/android/launcher3/Folder.java
@@ -21,6 +21,7 @@
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
+import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.res.Resources;
@@ -48,7 +49,6 @@
 import android.view.inputmethod.InputMethodManager;
 import android.widget.LinearLayout;
 import android.widget.TextView;
-
 import com.android.launcher3.CellLayout.CellInfo;
 import com.android.launcher3.DragController.DragListener;
 import com.android.launcher3.FolderInfo.FolderListener;
@@ -56,7 +56,6 @@
 import com.android.launcher3.UninstallDropTarget.UninstallSource;
 import com.android.launcher3.Workspace.ItemOperator;
 import com.android.launcher3.util.Thunk;
-
 import java.util.ArrayList;
 import java.util.Collections;
 
@@ -330,6 +329,7 @@
     /**
      * We need to handle touch events to prevent them from falling through to the workspace below.
      */
+    @SuppressLint("ClickableViewAccessibility")
     @Override
     public boolean onTouchEvent(MotionEvent ev) {
         return true;
@@ -406,8 +406,9 @@
      *
      * @return A new UserFolder.
      */
-    static Folder fromXml(Context context) {
-        return (Folder) LayoutInflater.from(context).inflate(R.layout.user_folder, null);
+    static Folder fromXml(Launcher launcher) {
+        return (Folder) LayoutInflater.from(launcher).inflate(R.layout.user_folder,
+                launcher.getDragLayer(), false);
     }
 
     /**
@@ -698,10 +699,10 @@
         boolean isOutsideLeftEdge = x < cellOverlap;
         boolean isOutsideRightEdge = x > (getWidth() - cellOverlap);
 
-        if (currentPage > 0 && (mContent.rtlLayout ? isOutsideRightEdge : isOutsideLeftEdge)) {
+        if (currentPage > 0 && (mContent.mIsRtl ? isOutsideRightEdge : isOutsideLeftEdge)) {
             showScrollHint(DragController.SCROLL_LEFT, d);
         } else if (currentPage < (mContent.getPageCount() - 1)
-                && (mContent.rtlLayout ? isOutsideLeftEdge : isOutsideRightEdge)) {
+                && (mContent.mIsRtl ? isOutsideLeftEdge : isOutsideRightEdge)) {
             showScrollHint(DragController.SCROLL_RIGHT, d);
         } else {
             mOnScrollHintAlarm.cancelAlarm();
diff --git a/src/com/android/launcher3/FolderPagedView.java b/src/com/android/launcher3/FolderPagedView.java
index a6494d2..94c016d 100644
--- a/src/com/android/launcher3/FolderPagedView.java
+++ b/src/com/android/launcher3/FolderPagedView.java
@@ -55,7 +55,7 @@
 
     private static final int[] sTempPosArray = new int[2];
 
-    public final boolean rtlLayout;
+    public final boolean mIsRtl;
 
     private final LayoutInflater mInflater;
     private final IconCache mIconCache;
@@ -89,7 +89,7 @@
         mInflater = LayoutInflater.from(context);
         mIconCache = app.getIconCache();
 
-        rtlLayout = getResources().getConfiguration().getLayoutDirection() == LAYOUT_DIRECTION_RTL;
+        mIsRtl = Utilities.isRtl(getResources());
         setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES);
     }
 
@@ -439,7 +439,7 @@
      * Scrolls the current view by a fraction
      */
     public void showScrollHint(int direction) {
-        float fraction = (direction == DragController.SCROLL_LEFT) ^ rtlLayout
+        float fraction = (direction == DragController.SCROLL_LEFT) ^ mIsRtl
                 ? -SCROLL_HINT_FRACTION : SCROLL_HINT_FRACTION;
         int hint = (int) (fraction * getWidth());
         int scroll = getScrollForPage(getNextPage()) + hint;
@@ -596,7 +596,7 @@
                         }
                     };
                     v.animate()
-                        .translationXBy((direction > 0 ^ rtlLayout) ? -v.getWidth() : v.getWidth())
+                        .translationXBy((direction > 0 ^ mIsRtl) ? -v.getWidth() : v.getWidth())
                         .setDuration(REORDER_ANIMATION_DURATION)
                         .setStartDelay(0)
                         .withEndAction(endAction);
diff --git a/src/com/android/launcher3/InfoDropTarget.java b/src/com/android/launcher3/InfoDropTarget.java
index f1ff48d..f3383cc 100644
--- a/src/com/android/launcher3/InfoDropTarget.java
+++ b/src/com/android/launcher3/InfoDropTarget.java
@@ -16,8 +16,10 @@
 
 package com.android.launcher3;
 
+import android.annotation.TargetApi;
 import android.content.ComponentName;
 import android.content.Context;
+import android.os.Build;
 import android.provider.Settings;
 import android.util.AttributeSet;
 
@@ -68,10 +70,18 @@
         return source.supportsAppInfoDropTarget() && supportsDrop(getContext(), info);
     }
 
+    @SuppressWarnings("deprecation")
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
     public static boolean supportsDrop(Context context, Object info) {
-        return (Settings.Global.getInt(context.getContentResolver(),
-                Settings.Global.DEVELOPMENT_SETTINGS_ENABLED, 0) == 1) &&
-                (info instanceof AppInfo || info instanceof PendingAddItemInfo);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
+            return (Settings.Global.getInt(context.getContentResolver(),
+                    Settings.Global.DEVELOPMENT_SETTINGS_ENABLED, 0) == 1) &&
+                    (info instanceof AppInfo || info instanceof PendingAddItemInfo);
+        } else {
+            return (Settings.Secure.getInt(context.getContentResolver(),
+                    Settings.Secure.DEVELOPMENT_SETTINGS_ENABLED, 0) == 1) &&
+                    (info instanceof AppInfo || info instanceof PendingAddItemInfo);
+        }
     }
 
     @Override
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 8603a35..72472b9 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -22,6 +22,7 @@
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
 import android.animation.ValueAnimator;
+import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.ActivityManager;
@@ -64,7 +65,6 @@
 import android.os.Message;
 import android.os.StrictMode;
 import android.os.SystemClock;
-import android.preference.PreferenceManager;
 import android.text.Selection;
 import android.text.SpannableStringBuilder;
 import android.text.TextUtils;
@@ -2582,6 +2582,7 @@
         }
     }
 
+    @SuppressLint("ClickableViewAccessibility")
     public boolean onTouch(View v, MotionEvent event) {
         return false;
     }
@@ -2850,6 +2851,7 @@
     public View.OnTouchListener getHapticFeedbackTouchListener() {
         if (mHapticFeedbackTouchListener == null) {
             mHapticFeedbackTouchListener = new View.OnTouchListener() {
+                @SuppressLint("ClickableViewAccessibility")
                 @Override
                 public boolean onTouch(View v, MotionEvent event) {
                     if ((event.getAction() & MotionEvent.ACTION_MASK) == MotionEvent.ACTION_DOWN) {
diff --git a/src/com/android/launcher3/LauncherAnimUtils.java b/src/com/android/launcher3/LauncherAnimUtils.java
index be295f8..6ff7666 100644
--- a/src/com/android/launcher3/LauncherAnimUtils.java
+++ b/src/com/android/launcher3/LauncherAnimUtils.java
@@ -21,10 +21,11 @@
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
 import android.animation.ValueAnimator;
+import android.annotation.TargetApi;
+import android.os.Build;
 import android.view.View;
 import android.view.ViewAnimationUtils;
 import android.view.ViewTreeObserver;
-
 import java.util.HashSet;
 import java.util.WeakHashMap;
 
@@ -128,6 +129,7 @@
         return anim;
     }
 
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     public static Animator createCircularReveal(View view, int centerX,
             int centerY, float startRadius, float endRadius) {
         Animator anim = ViewAnimationUtils.createCircularReveal(view, centerX,
diff --git a/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java b/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java
index af680f2..e19bc95 100644
--- a/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java
+++ b/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java
@@ -1,10 +1,12 @@
 package com.android.launcher3;
 
+import android.annotation.TargetApi;
 import android.appwidget.AppWidgetProviderInfo;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 import android.os.Parcel;
 
 /**
@@ -32,6 +34,7 @@
         info.writeToParcel(p, 0);
         p.setDataPosition(0);
         LauncherAppWidgetProviderInfo lawpi = new LauncherAppWidgetProviderInfo(p);
+        p.recycle();
 
         int[] minResizeSpan = Launcher.getMinSpanForWidget(context, lawpi);
         int[] span = Launcher.getSpanForWidget(context, lawpi);
@@ -64,6 +67,7 @@
         minSpanY = widget.getMinSpanY();
     }
 
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     public String getLabel(PackageManager packageManager) {
         if (isCustomWidget) {
             return Utilities.trim(label);
@@ -71,6 +75,7 @@
         return super.loadLabel(packageManager);
     }
 
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     public Drawable getIcon(Context context, IconCache cache) {
         if (isCustomWidget) {
             return cache.getFullResIcon(provider.getPackageName(), icon);
diff --git a/src/com/android/launcher3/LauncherClings.java b/src/com/android/launcher3/LauncherClings.java
index a2c56a9..63d3ebc 100644
--- a/src/com/android/launcher3/LauncherClings.java
+++ b/src/com/android/launcher3/LauncherClings.java
@@ -20,10 +20,12 @@
 import android.accounts.AccountManager;
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
+import android.annotation.TargetApi;
 import android.app.ActivityManager;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.UserManager;
 import android.provider.Settings;
@@ -34,7 +36,6 @@
 import android.view.ViewGroup;
 import android.view.ViewTreeObserver.OnGlobalLayoutListener;
 import android.view.accessibility.AccessibilityManager;
-
 import com.android.launcher3.util.Thunk;
 
 class LauncherClings implements OnClickListener {
@@ -212,6 +213,7 @@
     }
 
     /** Returns whether the clings are enabled or should be shown */
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
     private boolean areClingsEnabled() {
         if (DISABLE_CLINGS) {
             return false;
diff --git a/src/com/android/launcher3/LauncherStateTransitionAnimation.java b/src/com/android/launcher3/LauncherStateTransitionAnimation.java
index 73ae51c..3243754 100644
--- a/src/com/android/launcher3/LauncherStateTransitionAnimation.java
+++ b/src/com/android/launcher3/LauncherStateTransitionAnimation.java
@@ -22,16 +22,17 @@
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
 import android.animation.TimeInterpolator;
+import android.annotation.SuppressLint;
+import android.annotation.TargetApi;
 import android.content.res.Resources;
+import android.os.Build;
 import android.util.Log;
 import android.view.View;
 import android.view.ViewAnimationUtils;
 import android.view.animation.AccelerateInterpolator;
 import android.view.animation.DecelerateInterpolator;
-
 import com.android.launcher3.util.Thunk;
 import com.android.launcher3.widget.WidgetsContainerView;
-
 import java.util.HashMap;
 
 /**
@@ -227,6 +228,7 @@
     /**
      * Creates and starts a new animation to a particular overlay view.
      */
+    @SuppressLint("NewApi")
     private void startAnimationToOverlay(final Workspace.State toWorkspaceState, final View toView,
              final View contentView, final View revealView, final boolean animated,
              final boolean hideSearchBar, final PrivateTransitionCallbacks pCb) {
diff --git a/src/com/android/launcher3/MemoryTracker.java b/src/com/android/launcher3/MemoryTracker.java
index 2d37c80..067a50f 100644
--- a/src/com/android/launcher3/MemoryTracker.java
+++ b/src/com/android/launcher3/MemoryTracker.java
@@ -101,7 +101,7 @@
 
     public void startTrackingProcess(int pid, String name, long start) {
         synchronized (mLock) {
-            final Long lpid = new Long(pid);
+            final Long lpid = Long.valueOf(pid);
 
             if (mPids.contains(lpid)) return;
 
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index c8e7d9c..939615b 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -221,6 +221,7 @@
     private static final Rect sTmpRect = new Rect();
 
     protected final Rect mInsets = new Rect();
+    protected final boolean mIsRtl;
 
     public interface PageSwitchListener {
         void onPageSwitch(View newPage, int newPageIndex);
@@ -248,6 +249,7 @@
         a.recycle();
 
         setHapticFeedbackEnabled(false);
+        mIsRtl = Utilities.isRtl(getResources());
         init();
     }
 
@@ -403,13 +405,6 @@
     }
 
     /**
-     * Note: this is a reimplementation of View.isLayoutRtl() since that is currently hidden api.
-     */
-    public boolean isLayoutRtl() {
-        return (getLayoutDirection() == LAYOUT_DIRECTION_RTL);
-    }
-
-    /**
      * Returns the index of the currently displayed page.
      */
     int getCurrentPage() {
@@ -586,16 +581,15 @@
             x = Math.max(x, mFreeScrollMinScrollX);
         }
 
-        final boolean isRtl = isLayoutRtl();
         mUnboundedScrollX = x;
 
-        boolean isXBeforeFirstPage = isRtl ? (x > mMaxScrollX) : (x < 0);
-        boolean isXAfterLastPage = isRtl ? (x < 0) : (x > mMaxScrollX);
+        boolean isXBeforeFirstPage = mIsRtl ? (x > mMaxScrollX) : (x < 0);
+        boolean isXAfterLastPage = mIsRtl ? (x < 0) : (x > mMaxScrollX);
         if (isXBeforeFirstPage) {
             super.scrollTo(0, y);
             if (mAllowOverScroll) {
                 mWasInOverscroll = true;
-                if (isRtl) {
+                if (mIsRtl) {
                     overScroll(x - mMaxScrollX);
                 } else {
                     overScroll(x);
@@ -605,7 +599,7 @@
             super.scrollTo(mMaxScrollX, y);
             if (mAllowOverScroll) {
                 mWasInOverscroll = true;
-                if (isRtl) {
+                if (mIsRtl) {
                     overScroll(x);
                 } else {
                     overScroll(x - mMaxScrollX);
@@ -844,11 +838,9 @@
         // Update the viewport offsets
         mViewport.offset(offsetX,  offsetY);
 
-        final boolean isRtl = isLayoutRtl();
-
-        final int startIndex = isRtl ? childCount - 1 : 0;
-        final int endIndex = isRtl ? -1 : childCount;
-        final int delta = isRtl ? -1 : 1;
+        final int startIndex = mIsRtl ? childCount - 1 : 0;
+        final int endIndex = mIsRtl ? -1 : childCount;
+        final int delta = mIsRtl ? -1 : 1;
 
         int verticalPadding = getPaddingTop() + getPaddingBottom();
 
@@ -951,7 +943,7 @@
     private void updateMaxScrollX() {
         int childCount = getChildCount();
         if (childCount > 0) {
-            final int index = isLayoutRtl() ? 0 : childCount - 1;
+            final int index = mIsRtl ? 0 : childCount - 1;
             mMaxScrollX = getScrollForPage(index);
         } else {
             mMaxScrollX = 0;
@@ -1261,7 +1253,7 @@
      * Return true if a tap at (x, y) should trigger a flip to the previous page.
      */
     protected boolean hitsPreviousPage(float x, float y) {
-        if (isLayoutRtl()) {
+        if (mIsRtl) {
             return (x > (getViewportOffsetX() + getViewportWidth() -
                     getPaddingRight() - mPageSpacing));
         }
@@ -1272,7 +1264,7 @@
      * Return true if a tap at (x, y) should trigger a flip to the next page.
      */
     protected boolean hitsNextPage(float x, float y) {
-        if (isLayoutRtl()) {
+        if (mIsRtl) {
             return (x < getViewportOffsetX() + getPaddingLeft() + mPageSpacing);
         }
         return  (x > (getViewportOffsetX() + getViewportWidth() -
@@ -1462,7 +1454,7 @@
         final int totalDistance;
 
         int adjacentPage = page + 1;
-        if ((delta < 0 && !isLayoutRtl()) || (delta > 0 && isLayoutRtl())) {
+        if ((delta < 0 && !mIsRtl) || (delta > 0 && mIsRtl)) {
             adjacentPage = page - 1;
         }
 
@@ -1497,7 +1489,7 @@
             int scrollOffset = 0;
             LayoutParams lp = (LayoutParams) child.getLayoutParams();
             if (!lp.isFullScreenPage) {
-                scrollOffset = isLayoutRtl() ? getPaddingRight() : getPaddingLeft();
+                scrollOffset = mIsRtl ? getPaddingRight() : getPaddingLeft();
             }
 
             int baselineX = mPageScrolls[index] + scrollOffset + getViewportOffsetX();
@@ -1574,7 +1566,7 @@
 
     void updateFreescrollBounds() {
         getFreeScrollPageRange(mTempVisiblePagesRange);
-        if (isLayoutRtl()) {
+        if (mIsRtl) {
             mFreeScrollMinScrollX = getScrollForPage(mTempVisiblePagesRange[1]);
             mFreeScrollMaxScrollX = getScrollForPage(mTempVisiblePagesRange[0]);
         } else {
@@ -1813,9 +1805,8 @@
                     // We give flings precedence over large moves, which is why we short-circuit our
                     // test for a large move if a fling has been registered. That is, a large
                     // move to the left and fling to the right will register as a fling to the right.
-                    final boolean isRtl = isLayoutRtl();
-                    boolean isDeltaXLeft = isRtl ? deltaX > 0 : deltaX < 0;
-                    boolean isVelocityXLeft = isRtl ? velocityX > 0 : velocityX < 0;
+                    boolean isDeltaXLeft = mIsRtl ? deltaX > 0 : deltaX < 0;
+                    boolean isVelocityXLeft = mIsRtl ? velocityX > 0 : velocityX < 0;
                     if (((isSignificantMove && !isDeltaXLeft && !isFling) ||
                             (isFling && !isVelocityXLeft)) && mCurrentPage > 0) {
                         finalPage = returnToOriginalPage ? mCurrentPage : mCurrentPage - 1;
@@ -1939,7 +1930,7 @@
                         hscroll = event.getAxisValue(MotionEvent.AXIS_HSCROLL);
                     }
                     if (hscroll != 0 || vscroll != 0) {
-                        boolean isForwardScroll = isLayoutRtl() ? (hscroll < 0 || vscroll < 0)
+                        boolean isForwardScroll = mIsRtl ? (hscroll < 0 || vscroll < 0)
                                                          : (hscroll > 0 || vscroll > 0);
                         if (isForwardScroll) {
                             scrollRight();
diff --git a/src/com/android/launcher3/ShortcutAndWidgetContainer.java b/src/com/android/launcher3/ShortcutAndWidgetContainer.java
index 56c8b39..490ed6a 100644
--- a/src/com/android/launcher3/ShortcutAndWidgetContainer.java
+++ b/src/com/android/launcher3/ShortcutAndWidgetContainer.java
@@ -170,11 +170,7 @@
     }
 
     public boolean invertLayoutHorizontally() {
-        return mInvertIfRtl && isLayoutRtl();
-    }
-
-    public boolean isLayoutRtl() {
-        return (getLayoutDirection() == LAYOUT_DIRECTION_RTL);
+        return mInvertIfRtl && Utilities.isRtl(getResources());
     }
 
     @Override
diff --git a/src/com/android/launcher3/UninstallDropTarget.java b/src/com/android/launcher3/UninstallDropTarget.java
index c351135..0fc8f32 100644
--- a/src/com/android/launcher3/UninstallDropTarget.java
+++ b/src/com/android/launcher3/UninstallDropTarget.java
@@ -1,5 +1,6 @@
 package com.android.launcher3;
 
+import android.annotation.TargetApi;
 import android.content.ComponentName;
 import android.content.Context;
 import android.os.Build;
@@ -7,7 +8,6 @@
 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;
@@ -36,6 +36,7 @@
         return supportsDrop(getContext(), info);
     }
 
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
     public static boolean supportsDrop(Context context, Object info) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
             UserManager userManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 2981747..f3435fc 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -631,4 +631,10 @@
         Matcher m = sTrimPattern.matcher(s);
         return m.replaceAll("$1");
     }
+
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
+    public static boolean isRtl(Resources res) {
+        return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) &&
+                (res.getConfiguration().getLayoutDirection() == View.LAYOUT_DIRECTION_RTL);
+    }
 }
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 4004b1d..58e5877 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -21,6 +21,7 @@
 import android.animation.LayoutTransition;
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
+import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.WallpaperManager;
 import android.appwidget.AppWidgetHostView;
@@ -56,7 +57,6 @@
 import android.view.animation.DecelerateInterpolator;
 import android.view.animation.Interpolator;
 import android.widget.TextView;
-
 import com.android.launcher3.FolderIcon.FolderRingAnimator;
 import com.android.launcher3.Launcher.CustomContentCallbacks;
 import com.android.launcher3.Launcher.LauncherOverlay;
@@ -70,7 +70,6 @@
 import com.android.launcher3.util.WallpaperUtils;
 import com.android.launcher3.widget.PendingAddShortcutInfo;
 import com.android.launcher3.widget.PendingAddWidgetInfo;
-
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -553,8 +552,10 @@
             throw new RuntimeException("Screen id " + screenId + " already exists!");
         }
 
-        CellLayout newScreen = (CellLayout)
-                mLauncher.getLayoutInflater().inflate(R.layout.workspace_screen, null);
+        // Inflate the cell layout, but do not add it automatically so that we can get the newly
+        // created CellLayout.
+        CellLayout newScreen = (CellLayout) mLauncher.getLayoutInflater().inflate(
+                        R.layout.workspace_screen, this, false /* attachToRoot */);
 
         newScreen.setOnLongClickListener(mLongClickListener);
         newScreen.setOnClickListener(mLauncher);
@@ -573,7 +574,7 @@
 
     public void createCustomContentContainer() {
         CellLayout customScreen = (CellLayout)
-                mLauncher.getLayoutInflater().inflate(R.layout.workspace_screen, null);
+                mLauncher.getLayoutInflater().inflate(R.layout.workspace_screen, this, false);
         customScreen.disableBackground();
         customScreen.disableDragTarget();
 
@@ -1033,6 +1034,7 @@
      * listener via setOnInterceptTouchEventListener(). This allows us to tell the CellLayout
      * that it should intercept touch events, which is not something that is normally supported.
      */
+    @SuppressLint("ClickableViewAccessibility")
     @Override
     public boolean onTouch(View v, MotionEvent event) {
         return (workspaceInModalState() || !isFinishedSwitchingState())
@@ -1136,7 +1138,7 @@
         boolean passRightSwipesToCustomContent =
                 (mTouchDownTime - mCustomContentShowTime) > CUSTOM_CONTENT_GESTURE_DELAY;
 
-        boolean swipeInIgnoreDirection = isLayoutRtl() ? deltaX < 0 : deltaX > 0;
+        boolean swipeInIgnoreDirection = mIsRtl ? deltaX < 0 : deltaX > 0;
         boolean onCustomContentScreen =
                 getScreenIdForPageIndex(getCurrentPage()) == CUSTOM_CONTENT_SCREEN_ID;
         if (swipeInIgnoreDirection && onCustomContentScreen && passRightSwipesToCustomContent) {
@@ -1243,15 +1245,14 @@
 
     @Override
     protected void overScroll(float amount) {
-        boolean isRtl = isLayoutRtl();
-        boolean shouldOverScroll = (amount <= 0 && (!hasCustomContent() || isRtl)) ||
-                (amount >= 0 && (!hasCustomContent() || !isRtl));
+        boolean shouldOverScroll = (amount <= 0 && (!hasCustomContent() || mIsRtl)) ||
+                (amount >= 0 && (!hasCustomContent() || !mIsRtl));
 
         boolean shouldScrollOverlay = mLauncherOverlay != null &&
-                ((amount <= 0 && !isRtl) || (amount >= 0 && isRtl));
+                ((amount <= 0 && !mIsRtl) || (amount >= 0 && mIsRtl));
 
         boolean shouldZeroOverlay = mLauncherOverlay != null && mLastOverlaySroll != 0 &&
-                ((amount >= 0 && !isRtl) || (amount <= 0 && isRtl));
+                ((amount >= 0 && !mIsRtl) || (amount <= 0 && mIsRtl));
 
         if (shouldScrollOverlay) {
             if (!mStartedSendingScrollEvents && mScrollInteractionBegan) {
@@ -1265,7 +1266,7 @@
             int progress = (int) Math.abs((f * 100));
 
             mLastOverlaySroll = progress;
-            mLauncherOverlay.onScrollChange(progress, isRtl);
+            mLauncherOverlay.onScrollChange(progress, mIsRtl);
         } else if (shouldOverScroll) {
             dampedOverScroll(amount);
             mOverScrollEffect = acceleratedOverFactor(amount);
@@ -1274,7 +1275,7 @@
         }
 
         if (shouldZeroOverlay) {
-            mLauncherOverlay.onScrollChange(0, isRtl);
+            mLauncherOverlay.onScrollChange(0, mIsRtl);
         }
     }
 
@@ -1409,7 +1410,7 @@
             mNumPagesForWallpaperParallax = parallaxPageSpan;
 
             if (getChildCount() <= 1) {
-                if (isLayoutRtl()) {
+                if (mIsRtl) {
                     return 1 - 1.0f/mNumPagesForWallpaperParallax;
                 }
                 return 0;
@@ -1420,7 +1421,7 @@
             int firstIndex = numCustomPages();
             // Exclude the last extra empty screen (if we have > MIN_PARALLAX_PAGE_SPAN pages)
             int lastIndex = getChildCount() - 1 - emptyExtraPages;
-            if (isLayoutRtl()) {
+            if (mIsRtl) {
                 int temp = firstIndex;
                 firstIndex = lastIndex;
                 lastIndex = temp;
@@ -1441,7 +1442,7 @@
                 // On RTL devices, push the wallpaper offset to the right if we don't have enough
                 // pages (ie if numScrollingPages < MIN_PARALLAX_PAGE_SPAN)
                 if (!mWallpaperIsLiveWallpaper && numScrollingPages < MIN_PARALLAX_PAGE_SPAN
-                        && isLayoutRtl()) {
+                        && mIsRtl) {
                     return offset * (parallaxPageSpan - numScrollingPages + 1) / parallaxPageSpan;
                 }
                 return offset * (numScrollingPages - 1) / parallaxPageSpan;
@@ -1648,7 +1649,7 @@
             translationX = scrollRange - scrollDelta;
             progress = (scrollRange - scrollDelta) / scrollRange;
 
-            if (isLayoutRtl()) {
+            if (mIsRtl) {
                 translationX = Math.min(0, translationX);
             } else {
                 translationX = Math.max(0, translationX);
@@ -1702,7 +1703,6 @@
 
     @Override
     protected void screenScrolled(int screenCenter) {
-        final boolean isRtl = isLayoutRtl();
         super.screenScrolled(screenCenter);
 
         updatePageAlphaValues(screenCenter);
@@ -1717,7 +1717,7 @@
             final int upperIndex = getChildCount() - 1;
 
             final boolean isLeftPage = mOverScrollX < 0;
-            index = (!isRtl && isLeftPage) || (isRtl && !isLeftPage) ? lowerIndex : upperIndex;
+            index = (!mIsRtl && isLeftPage) || (mIsRtl && !isLeftPage) ? lowerIndex : upperIndex;
 
             CellLayout cl = (CellLayout) getChildAt(index);
             float effect = Math.abs(mOverScrollEffect);
diff --git a/src/com/android/launcher3/accessibility/OverviewScreenAccessibilityDelegate.java b/src/com/android/launcher3/accessibility/OverviewScreenAccessibilityDelegate.java
index d3f5230..c5b52de 100644
--- a/src/com/android/launcher3/accessibility/OverviewScreenAccessibilityDelegate.java
+++ b/src/com/android/launcher3/accessibility/OverviewScreenAccessibilityDelegate.java
@@ -16,17 +16,20 @@
 
 package com.android.launcher3.accessibility;
 
+import android.annotation.TargetApi;
 import android.content.Context;
+import android.os.Build;
 import android.os.Bundle;
 import android.util.SparseArray;
 import android.view.View;
 import android.view.View.AccessibilityDelegate;
 import android.view.accessibility.AccessibilityNodeInfo;
 import android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction;
-
 import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
 import com.android.launcher3.Workspace;
 
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
 public class OverviewScreenAccessibilityDelegate extends AccessibilityDelegate {
 
     private static final int MOVE_BACKWARD = R.id.action_move_screen_backwards;
@@ -39,7 +42,7 @@
         mWorkspace = workspace;
 
         Context context = mWorkspace.getContext();
-        boolean isRtl = mWorkspace.isLayoutRtl();
+        boolean isRtl = Utilities.isRtl(context.getResources());
         mActions.put(MOVE_BACKWARD, new AccessibilityAction(MOVE_BACKWARD,
                 context.getText(isRtl ? R.string.action_move_screen_right :
                     R.string.action_move_screen_left)));
diff --git a/src/com/android/launcher3/compat/AppWidgetManagerCompatV16.java b/src/com/android/launcher3/compat/AppWidgetManagerCompatV16.java
index 967b53b..8cecb96 100644
--- a/src/com/android/launcher3/compat/AppWidgetManagerCompatV16.java
+++ b/src/com/android/launcher3/compat/AppWidgetManagerCompatV16.java
@@ -16,6 +16,7 @@
 
 package com.android.launcher3.compat;
 
+import android.annotation.TargetApi;
 import android.app.Activity;
 import android.appwidget.AppWidgetHost;
 import android.appwidget.AppWidgetManager;
@@ -49,6 +50,7 @@
         return Utilities.trim(info.label);
     }
 
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
     @Override
     public boolean bindAppWidgetIdIfAllowed(int appWidgetId, AppWidgetProviderInfo info,
             Bundle options) {
diff --git a/src/com/android/launcher3/compat/LauncherActivityInfoCompatVL.java b/src/com/android/launcher3/compat/LauncherActivityInfoCompatVL.java
index b52cf1d..4448758 100644
--- a/src/com/android/launcher3/compat/LauncherActivityInfoCompatVL.java
+++ b/src/com/android/launcher3/compat/LauncherActivityInfoCompatVL.java
@@ -16,12 +16,14 @@
 
 package com.android.launcher3.compat;
 
+import android.annotation.TargetApi;
 import android.content.ComponentName;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.LauncherActivityInfo;
 import android.graphics.drawable.Drawable;
-import android.os.UserHandle;
+import android.os.Build;
 
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
 public class LauncherActivityInfoCompatVL extends LauncherActivityInfoCompat {
     private LauncherActivityInfo mLauncherActivityInfo;
 
diff --git a/src/com/android/launcher3/compat/LauncherAppsCompatVL.java b/src/com/android/launcher3/compat/LauncherAppsCompatVL.java
index e0d28b5..c862ffc 100644
--- a/src/com/android/launcher3/compat/LauncherAppsCompatVL.java
+++ b/src/com/android/launcher3/compat/LauncherAppsCompatVL.java
@@ -16,6 +16,7 @@
 
 package com.android.launcher3.compat;
 
+import android.annotation.TargetApi;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
@@ -32,6 +33,7 @@
 import java.util.List;
 import java.util.Map;
 
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
 public class LauncherAppsCompatVL extends LauncherAppsCompat {
 
     private LauncherApps mLauncherApps;
diff --git a/src/com/android/launcher3/compat/PackageInstallerCompatVL.java b/src/com/android/launcher3/compat/PackageInstallerCompatVL.java
index 395d5f9..3ad5101 100644
--- a/src/com/android/launcher3/compat/PackageInstallerCompatVL.java
+++ b/src/com/android/launcher3/compat/PackageInstallerCompatVL.java
@@ -16,10 +16,12 @@
 
 package com.android.launcher3.compat;
 
+import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.pm.PackageInstaller;
 import android.content.pm.PackageInstaller.SessionCallback;
 import android.content.pm.PackageInstaller.SessionInfo;
+import android.os.Build;
 import android.os.Handler;
 import android.util.SparseArray;
 
@@ -30,6 +32,7 @@
 
 import java.util.HashMap;
 
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
 public class PackageInstallerCompatVL extends PackageInstallerCompat {
 
     @Thunk final SparseArray<String> mActiveSessions = new SparseArray<>();
diff --git a/src/com/android/launcher3/compat/UserHandleCompat.java b/src/com/android/launcher3/compat/UserHandleCompat.java
index 2ae6731..d8e60b8 100644
--- a/src/com/android/launcher3/compat/UserHandleCompat.java
+++ b/src/com/android/launcher3/compat/UserHandleCompat.java
@@ -16,10 +16,10 @@
 
 package com.android.launcher3.compat;
 
+import android.annotation.TargetApi;
 import android.content.Intent;
 import android.os.Build;
 import android.os.UserHandle;
-
 import com.android.launcher3.Utilities;
 
 public class UserHandleCompat {
@@ -32,6 +32,7 @@
     private UserHandleCompat() {
     }
 
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
     public static UserHandleCompat myUserHandle() {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
             return new UserHandleCompat(android.os.Process.myUserHandle());
diff --git a/src/com/android/launcher3/compat/UserManagerCompatV17.java b/src/com/android/launcher3/compat/UserManagerCompatV17.java
index 055359a..c42c00c 100644
--- a/src/com/android/launcher3/compat/UserManagerCompatV17.java
+++ b/src/com/android/launcher3/compat/UserManagerCompatV17.java
@@ -16,14 +16,12 @@
 
 package com.android.launcher3.compat;
 
+import android.annotation.TargetApi;
 import android.content.Context;
-import android.graphics.drawable.Drawable;
-import android.os.UserHandle;
+import android.os.Build;
 import android.os.UserManager;
 
-import java.util.ArrayList;
-import java.util.List;
-
+@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
 public class UserManagerCompatV17 extends UserManagerCompatV16 {
     protected UserManager mUserManager;
 
diff --git a/src/com/android/launcher3/compat/UserManagerCompatVL.java b/src/com/android/launcher3/compat/UserManagerCompatVL.java
index 884d6fe..f6434c5 100644
--- a/src/com/android/launcher3/compat/UserManagerCompatVL.java
+++ b/src/com/android/launcher3/compat/UserManagerCompatVL.java
@@ -17,18 +17,19 @@
 
 package com.android.launcher3.compat;
 
+import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 import android.os.UserHandle;
-
 import com.android.launcher3.LauncherAppState;
-
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
 public class UserManagerCompatVL extends UserManagerCompatV17 {
     private static final String USER_CREATION_TIME_KEY = "user_creation_time_";
 
diff --git a/src/com/android/launcher3/widget/WidgetsListAdapter.java b/src/com/android/launcher3/widget/WidgetsListAdapter.java
index d6e0628..84884c4 100644
--- a/src/com/android/launcher3/widget/WidgetsListAdapter.java
+++ b/src/com/android/launcher3/widget/WidgetsListAdapter.java
@@ -15,8 +15,10 @@
  */
 package com.android.launcher3.widget;
 
+import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.pm.ResolveInfo;
+import android.os.Build;
 import android.support.v7.widget.RecyclerView;
 import android.content.res.Resources;
 import android.support.v7.widget.RecyclerView.Adapter;
@@ -27,9 +29,7 @@
 import android.view.ViewGroup.LayoutParams;
 import android.view.ViewGroup.MarginLayoutParams;
 import android.widget.LinearLayout;
-
 import com.android.launcher3.BubbleTextView;
-
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.DynamicGrid;
 import com.android.launcher3.IconCache;
@@ -38,7 +38,6 @@
 import com.android.launcher3.LauncherAppWidgetProviderInfo;
 import com.android.launcher3.R;
 import com.android.launcher3.WidgetPreviewLoader;
-
 import java.util.List;
 
 /**
@@ -157,6 +156,7 @@
         }
     }
 
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
     @Override
     public WidgetsRowViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
         if (DEBUG) {
@@ -167,7 +167,11 @@
                 R.layout.widgets_list_row_view, parent, false);
         LinearLayout cellList = (LinearLayout) container.findViewById(R.id.widgets_cell_list);
         MarginLayoutParams lp = (MarginLayoutParams) cellList.getLayoutParams();
-        lp.setMarginStart(mIndent);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
+            lp.setMarginStart(mIndent);
+        } else {
+            lp.leftMargin = mIndent;
+        }
         cellList.setLayoutParams(lp);
         return new WidgetsRowViewHolder(container);
     }