diff --git a/services/core/java/com/android/server/am/ActivityStack.java b/services/core/java/com/android/server/am/ActivityStack.java
index 77bb1a9..922cef4 100755
--- a/services/core/java/com/android/server/am/ActivityStack.java
+++ b/services/core/java/com/android/server/am/ActivityStack.java
@@ -1235,12 +1235,14 @@
             mUndrawnActivitiesBelowTopTranslucent.clear();
             mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG);
 
-            if (waitingActivity != null && waitingActivity.app != null &&
-                    waitingActivity.app.thread != null) {
-                try {
-                    waitingActivity.app.thread.scheduleTranslucentConversionComplete(
-                            waitingActivity.appToken, r != null);
-                } catch (RemoteException e) {
+            if (waitingActivity != null) {
+                mWindowManager.setWindowOpaque(waitingActivity.appToken, false);
+                if (waitingActivity.app != null && waitingActivity.app.thread != null) {
+                    try {
+                        waitingActivity.app.thread.scheduleTranslucentConversionComplete(
+                                waitingActivity.appToken, r != null);
+                    } catch (RemoteException e) {
+                    }
                 }
             }
         }
diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index f46056b..1747d01 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -4208,10 +4208,25 @@
         AppWindowToken atoken = findAppWindowToken(token);
         if (atoken != null) {
             atoken.appFullscreen = toOpaque;
+            // When making translucent, wait until windows below have been drawn.
+            if (toOpaque) {
+                // Making opaque so do it now.
+                setWindowOpaque(token, true);
+            }
             requestTraversal();
         }
     }
 
+    public void setWindowOpaque(IBinder token, boolean isOpaque) {
+        AppWindowToken wtoken = findAppWindowToken(token);
+        if (wtoken != null) {
+            WindowState win = wtoken.findMainWindow();
+            if (win != null) {
+                win.mWinAnimator.setOpaque(isOpaque);
+            }
+        }
+    }
+
     boolean setTokenVisibilityLocked(AppWindowToken wtoken, WindowManager.LayoutParams lp,
             boolean visible, int transit, boolean performLayout) {
         boolean delayed = false;
diff --git a/services/core/java/com/android/server/wm/WindowStateAnimator.java b/services/core/java/com/android/server/wm/WindowStateAnimator.java
index ffb17f1..ef236fb 100644
--- a/services/core/java/com/android/server/wm/WindowStateAnimator.java
+++ b/services/core/java/com/android/server/wm/WindowStateAnimator.java
@@ -490,6 +490,7 @@
         private final Rect mWindowCrop = new Rect();
         private boolean mShown = false;
         private int mLayerStack;
+        private boolean mIsOpaque;
         private final String mName;
 
         public SurfaceTrace(SurfaceSession s,
@@ -575,6 +576,16 @@
         }
 
         @Override
+        public void setOpaque(boolean isOpaque) {
+            if (isOpaque != mIsOpaque) {
+                Slog.v(SURFACE_TAG, "setOpaque(" + isOpaque + "): OLD:" + this
+                        + ". Called by " + Debug.getCallers(3));
+                mIsOpaque = isOpaque;
+            }
+            super.setOpaque(isOpaque);
+        }
+
+        @Override
         public void hide() {
             if (mShown) {
                 Slog.v(SURFACE_TAG, "hide: OLD:" + this + ". Called by " + Debug.getCallers(3));
@@ -620,7 +631,8 @@
                     + mName + " (" + mLayerStack + "): shown=" + mShown + " layer=" + mLayer
                     + " alpha=" + mSurfaceTraceAlpha + " " + mPosition.x + "," + mPosition.y
                     + " " + mSize.x + "x" + mSize.y
-                    + " crop=" + mWindowCrop.toShortString();
+                    + " crop=" + mWindowCrop.toShortString()
+                    + " opaque=" + mIsOpaque;
         }
     }
 
@@ -1337,8 +1349,7 @@
             Slog.w(TAG, "setTransparentRegionHint: null mSurface after mHasSurface true");
             return;
         }
-        if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG,
-            ">>> OPEN TRANSACTION setTransparentRegion");
+        if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG, ">>> OPEN TRANSACTION setTransparentRegion");
         SurfaceControl.openTransaction();
         try {
             if (SHOW_TRANSACTIONS) WindowManagerService.logSurface(mWin,
@@ -1364,8 +1375,7 @@
                 // transformation is being applied by the animation.
                 return;
             }
-            if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG,
-                    ">>> OPEN TRANSACTION setWallpaperOffset");
+            if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG, ">>> OPEN TRANSACTION setWallpaperOffset");
             SurfaceControl.openTransaction();
             try {
                 if (WindowManagerService.SHOW_TRANSACTIONS) WindowManagerService.logSurface(mWin,
@@ -1383,6 +1393,22 @@
         }
     }
 
+    void setOpaque(boolean isOpaque) {
+        if (mSurfaceControl == null) {
+            return;
+        }
+        if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG, ">>> OPEN TRANSACTION setOpaque");
+        SurfaceControl.openTransaction();
+        try {
+            if (SHOW_TRANSACTIONS) WindowManagerService.logSurface(mWin, "isOpaque=" + isOpaque,
+                    null);
+            mSurfaceControl.setOpaque(isOpaque);
+        } finally {
+            SurfaceControl.closeTransaction();
+            if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG, "<<< CLOSE TRANSACTION setOpaque");
+        }
+    }
+
     // This must be called while inside a transaction.
     boolean performShowLocked() {
         if (mWin.isHiddenFromUserLocked()) {