diff --git a/src/com/android/launcher2/Launcher.java b/src/com/android/launcher2/Launcher.java
index f74710e..fc17643 100644
--- a/src/com/android/launcher2/Launcher.java
+++ b/src/com/android/launcher2/Launcher.java
@@ -2713,10 +2713,8 @@
         if (animated) {
             final ValueAnimator scaleAnim = ValueAnimator.ofFloat(0f, 1f).setDuration(duration);
             scaleAnim.setInterpolator(new Workspace.ZoomOutInterpolator());
-            scaleAnim.addUpdateListener(new AnimatorUpdateListener() {
-                public void onAnimationUpdate(ValueAnimator animation) {
-                    final float b = (Float) animation.getAnimatedValue();
-                    final float a = 1f - b;
+            scaleAnim.addUpdateListener(new LauncherAnimatorUpdateListener() {
+                public void onAnimationUpdate(float a, float b) {
                     ((View) toView.getParent()).fastInvalidate();
                     toView.setFastScaleX(a * scale + b * 1f);
                     toView.setFastScaleY(a * scale + b * 1f);
@@ -2727,10 +2725,8 @@
                 toView.setFastAlpha(0f);
                 ValueAnimator alphaAnim = ValueAnimator.ofFloat(0f, 1f).setDuration(fadeDuration);
                 alphaAnim.setInterpolator(new DecelerateInterpolator(1.5f));
-                alphaAnim.addUpdateListener(new AnimatorUpdateListener() {
-                    public void onAnimationUpdate(ValueAnimator animation) {
-                        final float b = (Float) animation.getAnimatedValue();
-                        final float a = 1f - b;
+                alphaAnim.addUpdateListener(new LauncherAnimatorUpdateListener() {
+                    public void onAnimationUpdate(float a, float b) {
                         // don't need to invalidate because we do so above
                         toView.setFastAlpha(a * 0f + b * 1f);
                     }
@@ -2827,7 +2823,6 @@
         if (!springLoaded) {
             mWorkspace.unshrink(animated);
         }
-
         if (animated) {
             if (mStateAnimation != null) mStateAnimation.cancel();
             mStateAnimation = new AnimatorSet();
@@ -2837,10 +2832,8 @@
 
             ValueAnimator scaleAnim = ValueAnimator.ofFloat(0f, 1f).setDuration(duration);
             scaleAnim.setInterpolator(new Workspace.ZoomInInterpolator());
-            scaleAnim.addUpdateListener(new AnimatorUpdateListener() {
-                public void onAnimationUpdate(ValueAnimator animation) {
-                    final float b = (Float) animation.getAnimatedValue();
-                    final float a = 1f - b;
+            scaleAnim.addUpdateListener(new LauncherAnimatorUpdateListener() {
+                public void onAnimationUpdate(float a, float b) {
                     ((View)fromView.getParent()).fastInvalidate();
                     fromView.setFastScaleX(a * oldScaleX + b * scaleFactor);
                     fromView.setFastScaleY(a * oldScaleY + b * scaleFactor);
@@ -2849,10 +2842,8 @@
             final ValueAnimator alphaAnim = ValueAnimator.ofFloat(0f, 1f);
             alphaAnim.setDuration(res.getInteger(R.integer.config_allAppsFadeOutTime));
             alphaAnim.setInterpolator(new DecelerateInterpolator(1.5f));
-            alphaAnim.addUpdateListener(new AnimatorUpdateListener() {
-                public void onAnimationUpdate(ValueAnimator animation) {
-                    final float b = (Float) animation.getAnimatedValue();
-                    final float a = 1f - b;
+            alphaAnim.addUpdateListener(new LauncherAnimatorUpdateListener() {
+                public void onAnimationUpdate(float a, float b) {
                     // don't need to invalidate because we do so above
                     fromView.setFastAlpha(a * 1f + b * 0f);
                 }
diff --git a/src/com/android/launcher2/LauncherAnimatorUpdateListener.java b/src/com/android/launcher2/LauncherAnimatorUpdateListener.java
new file mode 100644
index 0000000..dd82113
--- /dev/null
+++ b/src/com/android/launcher2/LauncherAnimatorUpdateListener.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2011 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.launcher2;
+
+import android.animation.ValueAnimator;
+import android.animation.ValueAnimator.AnimatorUpdateListener;
+
+abstract class LauncherAnimatorUpdateListener implements AnimatorUpdateListener {
+    public void onAnimationUpdate(ValueAnimator animation) {
+        final float b = (Float) animation.getAnimatedValue();
+        final float a = 1f - b;
+        onAnimationUpdate(a, b);
+    }
+
+    abstract void onAnimationUpdate(float a, float b);
+}
\ No newline at end of file
diff --git a/src/com/android/launcher2/Workspace.java b/src/com/android/launcher2/Workspace.java
index 6b68c5a..92be5dc 100644
--- a/src/com/android/launcher2/Workspace.java
+++ b/src/com/android/launcher2/Workspace.java
@@ -1597,10 +1597,8 @@
             final float oldVerticalWallpaperOffset = getVerticalWallpaperOffset();
             final float newHorizontalWallpaperOffset = 0.5f;
             final float newVerticalWallpaperOffset = wallpaperOffset;
-            animWithInterpolator.addUpdateListener(new AnimatorUpdateListener() {
-                public void onAnimationUpdate(ValueAnimator animation) {
-                    final float b = (Float) animation.getAnimatedValue();
-                    final float a = 1f - b;
+            animWithInterpolator.addUpdateListener(new LauncherAnimatorUpdateListener() {
+                public void onAnimationUpdate(float a, float b) {
                     if (b == 0f) {
                         // an optimization, and required for correct behavior.
                         return;
@@ -1942,10 +1940,8 @@
                 final float oldVerticalWallpaperOffset = getVerticalWallpaperOffset();
                 final float newHorizontalWallpaperOffset = wallpaperOffsetForCurrentScroll();
                 final float newVerticalWallpaperOffset = 0.5f;
-                animWithInterpolator.addUpdateListener(new AnimatorUpdateListener() {
-                    public void onAnimationUpdate(ValueAnimator animation) {
-                        final float b = (Float) animation.getAnimatedValue();
-                        final float a = 1f - b;
+                animWithInterpolator.addUpdateListener(new LauncherAnimatorUpdateListener() {
+                    public void onAnimationUpdate(float a, float b) {
                         if (b == 0f) {
                             // an optimization, but not required
                             return;
@@ -1976,11 +1972,9 @@
                 ValueAnimator rotationAnim =
                     ValueAnimator.ofFloat(0f, 1f).setDuration(duration);
                 rotationAnim.setInterpolator(new DecelerateInterpolator(2.0f));
-                rotationAnim.addUpdateListener(new AnimatorUpdateListener() {
-                    public void onAnimationUpdate(ValueAnimator animation) {
+                rotationAnim.addUpdateListener(new LauncherAnimatorUpdateListener() {
+                    public void onAnimationUpdate(float a, float b) {
                         // don't invalidate workspace because we did it above
-                        final float b = (Float) animation.getAnimatedValue();
-                        final float a = 1f - b;
                         if (b == 0f) {
                             // an optimization, but not required
                             return;