diff --git a/core/java/android/view/animation/Animation.java b/core/java/android/view/animation/Animation.java
index 81e2f3ca98ecc..b1d618eff40a6 100644
--- a/core/java/android/view/animation/Animation.java
+++ b/core/java/android/view/animation/Animation.java
@@ -258,6 +258,8 @@ public abstract class Animation implements Cloneable {
 
         setZAdjustment(a.getInt(com.android.internal.R.styleable.Animation_zAdjustment, ZORDER_NORMAL));
 
+        setBackgroundColor(a.getInt(com.android.internal.R.styleable.Animation_background, 0));
+
         setDetachWallpaper(
                 a.getBoolean(com.android.internal.R.styleable.Animation_detachWallpaper, false));
         setShowWallpaper(
@@ -630,15 +632,16 @@ public abstract class Animation implements Cloneable {
     }
 
     /**
-     * Set background behind an animation.
+     * Set background behind animation.
      *
-     * @param bg The background color. If 0, no background.
+     * @param bg The background color.  If 0, no background.  Currently must
+     * be black, with any desired alpha level.
      *
      * @deprecated None of window animations are running with background color.
      */
     @Deprecated
     public void setBackgroundColor(@ColorInt int bg) {
-        mBackgroundColor = bg;
+        // The background color is not needed any more, do nothing.
     }
 
     /**
@@ -800,7 +803,7 @@ public abstract class Animation implements Cloneable {
     @Deprecated
     @ColorInt
     public int getBackgroundColor() {
-        return mBackgroundColor;
+        return 0;
     }
 
     /**
diff --git a/core/res/res/values/attrs.xml b/core/res/res/values/attrs.xml
index e26984a0d9921..a5f505176d5d1 100644
--- a/core/res/res/values/attrs.xml
+++ b/core/res/res/values/attrs.xml
@@ -6822,8 +6822,9 @@
                  content for the duration of the animation. -->
             <enum name="bottom" value="-1" />
         </attr>
-        <!-- Special background behind animation. Only for use with task animations.
-             If 0, the default, there is no background. -->
+        <!-- Special background behind animation.  Only for use with window
+             animations.  Can only be a color, and only black.  If 0, the
+             default, there is no background. -->
         <attr name="background" />
         <!-- Special option for window animations: if this window is on top
              of a wallpaper, don't animate the wallpaper with it. -->
@@ -7736,7 +7737,7 @@
 
         <!-- Name of a method on the Context used to inflate the menu that will be
              called when the item is clicked.
-             {@deprecated Menu actually traverses the Context hierarchy looking for the
+             {@deprecated Menu actually traverses the Context hierarchy looking for the 
              relevant method, which is fragile (an intermediate ContextWrapper adding a
              same-named method would change behavior) and restricts bytecode optimizers
              such as R8. Instead, use MenuItem.setOnMenuItemClickListener.} -->
diff --git a/services/core/java/com/android/server/wm/AnimationAdapter.java b/services/core/java/com/android/server/wm/AnimationAdapter.java
index 486328a758dab..529c4f6087433 100644
--- a/services/core/java/com/android/server/wm/AnimationAdapter.java
+++ b/services/core/java/com/android/server/wm/AnimationAdapter.java
@@ -16,7 +16,6 @@
 
 package com.android.server.wm;
 
-import android.annotation.ColorInt;
 import android.util.proto.ProtoOutputStream;
 import android.view.SurfaceControl;
 import android.view.SurfaceControl.Transaction;
@@ -107,14 +106,4 @@ interface AnimationAdapter {
     default boolean shouldDeferAnimationFinish(Runnable endDeferFinishCallback) {
         return false;
     }
-
-    /**
-     * Gets the background color to show behind an animation.
-     *
-     * @return The background color to show behind an animation (0 for no background color).
-     */
-    @ColorInt
-    default int getBackgroundColor() {
-        return 0;
-    }
 }
diff --git a/services/core/java/com/android/server/wm/LocalAnimationAdapter.java b/services/core/java/com/android/server/wm/LocalAnimationAdapter.java
index 8f161bf6ecc40..520bd8b2108e2 100644
--- a/services/core/java/com/android/server/wm/LocalAnimationAdapter.java
+++ b/services/core/java/com/android/server/wm/LocalAnimationAdapter.java
@@ -19,7 +19,6 @@ package com.android.server.wm;
 import static com.android.server.wm.AnimationAdapterProto.LOCAL;
 import static com.android.server.wm.LocalAnimationAdapterProto.ANIMATION_SPEC;
 
-import android.annotation.ColorInt;
 import android.os.SystemClock;
 import android.util.proto.ProtoOutputStream;
 import android.view.SurfaceControl;
@@ -72,12 +71,6 @@ class LocalAnimationAdapter implements AnimationAdapter {
         return mSpec.calculateStatusBarTransitionStartTime();
     }
 
-    @Override
-    @ColorInt
-    public int getBackgroundColor() {
-        return mSpec.getBackgroundColor();
-    }
-
     @Override
     public void dump(PrintWriter pw, String prefix) {
         mSpec.dump(pw, prefix);
@@ -156,9 +149,5 @@ class LocalAnimationAdapter implements AnimationAdapter {
         }
 
         void dumpDebugInner(ProtoOutputStream proto);
-
-        default int getBackgroundColor() {
-            return 0;
-        }
     }
 }
diff --git a/services/core/java/com/android/server/wm/WindowAnimationSpec.java b/services/core/java/com/android/server/wm/WindowAnimationSpec.java
index 08758afcb0b24..073a508083f07 100644
--- a/services/core/java/com/android/server/wm/WindowAnimationSpec.java
+++ b/services/core/java/com/android/server/wm/WindowAnimationSpec.java
@@ -21,7 +21,6 @@ import static com.android.server.wm.AnimationSpecProto.WINDOW;
 import static com.android.server.wm.WindowAnimationSpecProto.ANIMATION;
 import static com.android.server.wm.WindowStateAnimator.ROOT_TASK_CLIP_NONE;
 
-import android.annotation.ColorInt;
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.os.SystemClock;
@@ -85,12 +84,6 @@ public class WindowAnimationSpec implements AnimationSpec {
         return mAnimation.computeDurationHint();
     }
 
-    @Override
-    @ColorInt
-    public int getBackgroundColor() {
-        return mAnimation.getBackgroundColor();
-    }
-
     @Override
     public void apply(Transaction t, SurfaceControl leash, long currentPlayTime) {
         final TmpValues tmp = mThreadLocalTmps.get();