diff --git a/proguard.flags b/proguard.flags
index a312b91..bb52a6c 100644
--- a/proguard.flags
+++ b/proguard.flags
@@ -2,80 +2,6 @@
   *;
 }
 
--keep class com.android.launcher3.allapps.AllAppsBackgroundDrawable {
-  public void setAlpha(int);
-  public int getAlpha();
-}
-
--keep class com.android.launcher3.BaseRecyclerViewFastScrollBar {
-  public void setThumbWidth(int);
-  public int getThumbWidth();
-  public void setTrackWidth(int);
-  public int getTrackWidth();
-}
-
--keep class com.android.launcher3.BaseRecyclerViewFastScrollPopup {
-  public void setAlpha(float);
-  public float getAlpha();
-}
-
--keep class com.android.launcher3.ButtonDropTarget {
-  public int getTextColor();
-}
-
--keep class com.android.launcher3.CellLayout {
-  public float getBackgroundAlpha();
-  public void setBackgroundAlpha(float);
-}
-
--keep class com.android.launcher3.CellLayout$LayoutParams {
-  public void setWidth(int);
-  public int getWidth();
-  public void setHeight(int);
-  public int getHeight();
-  public void setX(int);
-  public int getX();
-  public void setY(int);
-  public int getY();
-}
-
--keep class com.android.launcher3.views.BaseDragLayer$LayoutParams {
-  public void setWidth(int);
-  public int getWidth();
-  public void setHeight(int);
-  public int getHeight();
-  public void setX(int);
-  public int getX();
-  public void setY(int);
-  public int getY();
-}
-
--keep class com.android.launcher3.FastBitmapDrawable {
-  public void setDesaturation(float);
-  public float getDesaturation();
-  public void setBrightness(float);
-  public float getBrightness();
-}
-
--keep class com.android.launcher3.MemoryDumpActivity {
-  *;
-}
-
--keep class com.android.launcher3.PreloadIconDrawable {
-  public float getAnimationProgress();
-  public void setAnimationProgress(float);
-}
-
--keep class com.android.launcher3.pageindicators.CaretDrawable {
-  public float getCaretProgress();
-  public void setCaretProgress(float);
-}
-
--keep class com.android.launcher3.Workspace {
-  public float getBackgroundAlpha();
-  public void setBackgroundAlpha(float);
-}
-
 # Proguard will strip new callbacks in LauncherApps.Callback from
 # WrappedCallback if compiled against an older SDK. Don't let this happen.
 -keep class com.android.launcher3.compat.** {
diff --git a/src/com/android/launcher3/AppWidgetResizeFrame.java b/src/com/android/launcher3/AppWidgetResizeFrame.java
index 0f5317b..8e2ffe9 100644
--- a/src/com/android/launcher3/AppWidgetResizeFrame.java
+++ b/src/com/android/launcher3/AppWidgetResizeFrame.java
@@ -1,5 +1,10 @@
 package com.android.launcher3;
 
+import static com.android.launcher3.LauncherAnimUtils.LAYOUT_HEIGHT;
+import static com.android.launcher3.LauncherAnimUtils.LAYOUT_WIDTH;
+import static com.android.launcher3.views.BaseDragLayer.LAYOUT_X;
+import static com.android.launcher3.views.BaseDragLayer.LAYOUT_Y;
+
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
@@ -429,10 +434,10 @@
             requestLayout();
         } else {
             ObjectAnimator oa = ObjectAnimator.ofPropertyValuesHolder(lp,
-                    PropertyValuesHolder.ofInt("width", lp.width, newWidth),
-                    PropertyValuesHolder.ofInt("height", lp.height, newHeight),
-                    PropertyValuesHolder.ofInt("x", lp.x, newX),
-                    PropertyValuesHolder.ofInt("y", lp.y, newY));
+                    PropertyValuesHolder.ofInt(LAYOUT_WIDTH, lp.width, newWidth),
+                    PropertyValuesHolder.ofInt(LAYOUT_HEIGHT, lp.height, newHeight),
+                    PropertyValuesHolder.ofInt(LAYOUT_X, lp.x, newX),
+                    PropertyValuesHolder.ofInt(LAYOUT_Y, lp.y, newY));
             mFirstFrameAnimatorHelper.addTo(oa).addUpdateListener(a -> requestLayout());
 
             AnimatorSet set = new AnimatorSet();
diff --git a/src/com/android/launcher3/ButtonDropTarget.java b/src/com/android/launcher3/ButtonDropTarget.java
index dd63ebc..2b0da43 100644
--- a/src/com/android/launcher3/ButtonDropTarget.java
+++ b/src/com/android/launcher3/ButtonDropTarget.java
@@ -33,6 +33,7 @@
 import android.graphics.drawable.Drawable;
 import android.text.TextUtils;
 import android.util.AttributeSet;
+import android.util.Property;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -55,6 +56,20 @@
 public abstract class ButtonDropTarget extends TextView
         implements DropTarget, DragController.DragListener, OnClickListener {
 
+    private static final Property<ButtonDropTarget, Integer> TEXT_COLOR =
+            new Property<ButtonDropTarget, Integer>(Integer.TYPE, "textColor") {
+
+                @Override
+                public Integer get(ButtonDropTarget target) {
+                    return target.getTextColor();
+                }
+
+                @Override
+                public void set(ButtonDropTarget target, Integer value) {
+                    target.setTextColor(value);
+                }
+            };
+
     private static final int[] sTempCords = new int[2];
     private static final int DRAG_VIEW_DROP_DURATION = 285;
 
@@ -206,7 +221,7 @@
         });
 
         mCurrentColorAnim.play(anim1);
-        mCurrentColorAnim.play(ObjectAnimator.ofArgb(this, "textColor", targetColor));
+        mCurrentColorAnim.play(ObjectAnimator.ofArgb(this, TEXT_COLOR, targetColor));
         mCurrentColorAnim.start();
     }
 
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index f6f1496..a42238e 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -2678,38 +2678,6 @@
         public String toString() {
             return "(" + this.cellX + ", " + this.cellY + ")";
         }
-
-        public void setWidth(int width) {
-            this.width = width;
-        }
-
-        public int getWidth() {
-            return width;
-        }
-
-        public void setHeight(int height) {
-            this.height = height;
-        }
-
-        public int getHeight() {
-            return height;
-        }
-
-        public void setX(int x) {
-            this.x = x;
-        }
-
-        public int getX() {
-            return x;
-        }
-
-        public void setY(int y) {
-            this.y = y;
-        }
-
-        public int getY() {
-            return y;
-        }
     }
 
     // This class stores info for two purposes:
diff --git a/src/com/android/launcher3/LauncherAnimUtils.java b/src/com/android/launcher3/LauncherAnimUtils.java
index ac07e88..aad3449 100644
--- a/src/com/android/launcher3/LauncherAnimUtils.java
+++ b/src/com/android/launcher3/LauncherAnimUtils.java
@@ -19,6 +19,7 @@
 import android.graphics.drawable.Drawable;
 import android.util.Property;
 import android.view.View;
+import android.view.ViewGroup.LayoutParams;
 
 public class LauncherAnimUtils {
     /**
@@ -64,4 +65,30 @@
     public static int blockedFlingDurationFactor(float velocity) {
         return (int) Utilities.boundToRange(Math.abs(velocity) / 2, 2f, 6f);
     }
+
+    public static final Property<LayoutParams, Integer> LAYOUT_WIDTH =
+            new Property<LayoutParams, Integer>(Integer.TYPE, "width") {
+                @Override
+                public Integer get(LayoutParams lp) {
+                    return lp.width;
+                }
+
+                @Override
+                public void set(LayoutParams lp, Integer width) {
+                    lp.width = width;
+                }
+            };
+
+    public static final Property<LayoutParams, Integer> LAYOUT_HEIGHT =
+            new Property<LayoutParams, Integer>(Integer.TYPE, "height") {
+                @Override
+                public Integer get(LayoutParams lp) {
+                    return lp.height;
+                }
+
+                @Override
+                public void set(LayoutParams lp, Integer height) {
+                    lp.height = height;
+                }
+            };
 }
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 353916f..b5a770f 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -671,9 +671,6 @@
     private void fadeAndRemoveEmptyScreen(int delay, int duration, final Runnable onComplete,
             final boolean stripEmptyScreens) {
         // XXX: Do we need to update LM workspace screens below?
-        PropertyValuesHolder alpha = PropertyValuesHolder.ofFloat("alpha", 0f);
-        PropertyValuesHolder bgAlpha = PropertyValuesHolder.ofFloat("backgroundAlpha", 0f);
-
         final CellLayout cl = mWorkspaceScreens.get(EXTRA_EMPTY_SCREEN_ID);
 
         mRemoveEmptyScreenRunnable = new Runnable() {
@@ -692,7 +689,7 @@
             }
         };
 
-        ObjectAnimator oa = ObjectAnimator.ofPropertyValuesHolder(cl, alpha, bgAlpha);
+        ObjectAnimator oa = ObjectAnimator.ofFloat(cl, ALPHA, 0f);
         oa.setDuration(duration);
         oa.setStartDelay(delay);
         oa.addListener(new AnimatorListenerAdapter() {
diff --git a/src/com/android/launcher3/views/BaseDragLayer.java b/src/com/android/launcher3/views/BaseDragLayer.java
index e8a879f..1faca15 100644
--- a/src/com/android/launcher3/views/BaseDragLayer.java
+++ b/src/com/android/launcher3/views/BaseDragLayer.java
@@ -21,6 +21,7 @@
 import android.content.Context;
 import android.graphics.Rect;
 import android.util.AttributeSet;
+import android.util.Property;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
@@ -42,6 +43,32 @@
 public abstract class BaseDragLayer<T extends Context & ActivityContext>
         extends InsettableFrameLayout {
 
+    public static final Property<LayoutParams, Integer> LAYOUT_X =
+            new Property<LayoutParams, Integer>(Integer.TYPE, "x") {
+                @Override
+                public Integer get(LayoutParams lp) {
+                    return lp.x;
+                }
+
+                @Override
+                public void set(LayoutParams lp, Integer x) {
+                    lp.x = x;
+                }
+            };
+
+    public static final Property<LayoutParams, Integer> LAYOUT_Y =
+            new Property<LayoutParams, Integer>(Integer.TYPE, "y") {
+                @Override
+                public Integer get(LayoutParams lp) {
+                    return lp.y;
+                }
+
+                @Override
+                public void set(LayoutParams lp, Integer y) {
+                    lp.y = y;
+                }
+            };
+
     protected final int[] mTmpXY = new int[2];
     protected final Rect mHitRect = new Rect();
 
@@ -307,38 +334,6 @@
         public LayoutParams(ViewGroup.LayoutParams lp) {
             super(lp);
         }
-
-        public void setWidth(int width) {
-            this.width = width;
-        }
-
-        public int getWidth() {
-            return width;
-        }
-
-        public void setHeight(int height) {
-            this.height = height;
-        }
-
-        public int getHeight() {
-            return height;
-        }
-
-        public void setX(int x) {
-            this.x = x;
-        }
-
-        public int getX() {
-            return x;
-        }
-
-        public void setY(int y) {
-            this.y = y;
-        }
-
-        public int getY() {
-            return y;
-        }
     }
 
     protected void onLayout(boolean changed, int l, int t, int r, int b) {