1 files changed, 15 insertions, 9 deletions

diff --git a/services/core/java/com/android/server/policy/PhoneWindowManager.java b/services/core/java/com/android/server/policy/PhoneWindowManager.java
index cdf475e265c3..01c7e52a269f 100644
--- a/services/core/java/com/android/server/policy/PhoneWindowManager.java
+++ b/services/core/java/com/android/server/policy/PhoneWindowManager.java
@@ -3378,7 +3378,8 @@ public class PhoneWindowManager implements WindowManagerPolicy {
             mPendingKeyguardOccluded = occluded;
             mKeyguardOccludedChanged = true;
         } else {
-            setKeyguardOccludedLw(occluded, false /* transitionStarted */);
+            setKeyguardOccludedLw(occluded, false /* force */,
+                    false /* transitionStarted */);
         }
     }
 
@@ -3387,7 +3388,8 @@ public class PhoneWindowManager implements WindowManagerPolicy {
         if (mKeyguardOccludedChanged) {
             if (DEBUG_KEYGUARD) Slog.d(TAG, "transition/occluded changed occluded="
                     + mPendingKeyguardOccluded);
-            if (setKeyguardOccludedLw(mPendingKeyguardOccluded, transitionStarted)) {
+            if (setKeyguardOccludedLw(mPendingKeyguardOccluded, false /* force */,
+                    transitionStarted)) {
                 return FINISH_LAYOUT_REDO_LAYOUT | FINISH_LAYOUT_REDO_WALLPAPER;
             }
         }
@@ -3641,15 +3643,22 @@ public class PhoneWindowManager implements WindowManagerPolicy {
     }
 
     /**
-     * Updates the occluded state of the Keyguard immediately via
-     * {@link com.android.internal.policy.IKeyguardService}.
+     * Updates the occluded state of the Keyguard.
      *
      * @param isOccluded Whether the Keyguard is occluded by another window.
+     * @param force notify the occluded status to KeyguardService and update flags even though
+     *             occlude status doesn't change.
      * @param transitionStarted {@code true} if keyguard (un)occluded transition started.
      * @return Whether the flags have changed and we have to redo the layout.
      */
-    private boolean setKeyguardOccludedLw(boolean isOccluded, boolean transitionStarted) {
+    private boolean setKeyguardOccludedLw(boolean isOccluded, boolean force,
+            boolean transitionStarted) {
         if (DEBUG_KEYGUARD) Slog.d(TAG, "setKeyguardOccluded occluded=" + isOccluded);
+        mKeyguardOccludedChanged = false;
+        if (isKeyguardOccluded() == isOccluded && !force) {
+            return false;
+        }
+
         final boolean showing = mKeyguardDelegate.isShowing();
         final boolean animate = showing && !isOccluded;
         // When remote animation is enabled for keyguard (un)occlude transition, KeyguardService
@@ -3657,10 +3666,7 @@ public class PhoneWindowManager implements WindowManagerPolicy {
         // to notify here.
         final boolean notify = !WindowManagerService.sEnableRemoteKeyguardOccludeAnimation
                 || !transitionStarted;
-        if (notify) {
-            mKeyguardOccludedChanged = false;
-            mKeyguardDelegate.setOccluded(isOccluded, animate, notify);
-        }
+        mKeyguardDelegate.setOccluded(isOccluded, animate, notify);
         return showing;
     }