Merge "Prevent flicker on orientation change while starting" into tm-qpr-dev

services/core/java/com/android/server/wm/ActivityRecord.java

@@ -4025,7 +4025,7 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
     }
 
     void finishRelaunching() {
-        mLetterboxUiController.setRelauchingAfterRequestedOrientationChanged(false);
+        mLetterboxUiController.setRelaunchingAfterRequestedOrientationChanged(false);
         mTaskSupervisor.getActivityMetricsLogger().notifyActivityRelaunched(this);
 
         if (mPendingRelaunchCount > 0) {
@@ -9420,7 +9420,7 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
                 mRelaunchReason = RELAUNCH_REASON_NONE;
             }
             if (isRequestedOrientationChanged) {
-                mLetterboxUiController.setRelauchingAfterRequestedOrientationChanged(true);
+                mLetterboxUiController.setRelaunchingAfterRequestedOrientationChanged(true);
             }
             if (mState == PAUSING) {
                 // A little annoying: we are waiting for this activity to finish pausing. Let's not

services/core/java/com/android/server/wm/LetterboxUiController.java

@@ -242,7 +242,9 @@ final class LetterboxUiController {
     @Nullable
     private final Boolean mBooleanPropertyFakeFocus;
 
-    private boolean mIsRelauchingAfterRequestedOrientationChanged;
+    private boolean mIsRelaunchingAfterRequestedOrientationChanged;
+
+    private boolean mLastShouldShowLetterboxUi;
 
     private boolean mDoubleTapEvent;
 
@@ -395,7 +397,7 @@ final class LetterboxUiController {
                         ::isPolicyForIgnoringRequestedOrientationEnabled,
                 mIsOverrideEnableCompatIgnoreRequestedOrientationEnabled,
                 mBooleanPropertyIgnoreRequestedOrientation)) {
-            if (mIsRelauchingAfterRequestedOrientationChanged) {
+            if (mIsRelaunchingAfterRequestedOrientationChanged) {
                 Slog.w(TAG, "Ignoring orientation update to "
                         + screenOrientationToString(requestedOrientation)
                         + " due to relaunching after setRequestedOrientation for "
@@ -484,8 +486,8 @@ final class LetterboxUiController {
      * Sets whether an activity is relaunching after the app has called {@link
      * android.app.Activity#setRequestedOrientation}.
      */
-    void setRelauchingAfterRequestedOrientationChanged(boolean isRelaunching) {
+    void setRelaunchingAfterRequestedOrientationChanged(boolean isRelaunching) {
-        mIsRelauchingAfterRequestedOrientationChanged = isRelaunching;
+        mIsRelaunchingAfterRequestedOrientationChanged = isRelaunching;
     }
 
     /**
@@ -1162,12 +1164,28 @@ final class LetterboxUiController {
 
     @VisibleForTesting
     boolean shouldShowLetterboxUi(WindowState mainWindow) {
-        return (mActivityRecord.isInLetterboxAnimation() || isSurfaceVisible(mainWindow))
+        if (mIsRelaunchingAfterRequestedOrientationChanged || !isSurfaceReadyToShow(mainWindow)) {
+            return mLastShouldShowLetterboxUi;
+        }
+
+        final boolean shouldShowLetterboxUi =
+                (mActivityRecord.isInLetterboxAnimation() || isSurfaceVisible(mainWindow))
                 && mainWindow.areAppWindowBoundsLetterboxed()
                 // Check for FLAG_SHOW_WALLPAPER explicitly instead of using
                 // WindowContainer#showWallpaper because the later will return true when this
                 // activity is using blurred wallpaper for letterbox background.
                 && (mainWindow.getAttrs().flags & FLAG_SHOW_WALLPAPER) == 0;
+
+        mLastShouldShowLetterboxUi = shouldShowLetterboxUi;
+
+        return shouldShowLetterboxUi;
+    }
+
+    @VisibleForTesting
+    boolean isSurfaceReadyToShow(WindowState mainWindow) {
+        return mainWindow.isDrawn() // Regular case
+                // Waiting for relayoutWindow to call preserveSurface
+                || mainWindow.isDragResizeChanged();
     }
 
     @VisibleForTesting
@@ -1303,6 +1321,10 @@ final class LetterboxUiController {
         return null;
     }
 
+    boolean getIsRelaunchingAfterRequestedOrientationChanged() {
+        return mIsRelaunchingAfterRequestedOrientationChanged;
+    }
+
     private void adjustBoundsForTaskbar(final WindowState mainWindow, final Rect bounds) {
         // Rounded corners should be displayed above the taskbar. When taskbar is hidden,
         // an insets frame is equal to a navigation bar which shouldn't affect position of

services/core/java/com/android/server/wm/WindowState.java

@@ -5596,8 +5596,17 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
             if (surfaceInsetsChanged) {
                 mLastSurfaceInsets.set(mAttrs.surfaceInsets);
             }
-            if (surfaceSizeChanged && mWinAnimator.getShown() && !canPlayMoveAnimation()
+            final boolean surfaceResizedWithoutMoveAnimation = surfaceSizeChanged
-                    && okToDisplay() && mSyncState == SYNC_STATE_NONE) {
+                    && mWinAnimator.getShown() && !canPlayMoveAnimation() && okToDisplay()
+                    && mSyncState == SYNC_STATE_NONE;
+            final ActivityRecord activityRecord = getActivityRecord();
+            // If this window belongs to an activity that is relaunching due to an orientation
+            // change then delay the position update until it has redrawn to avoid any flickers.
+            final boolean isLetterboxedAndRelaunching = activityRecord != null
+                    && activityRecord.areBoundsLetterboxed()
+                    && activityRecord.mLetterboxUiController
+                        .getIsRelaunchingAfterRequestedOrientationChanged();
+            if (surfaceResizedWithoutMoveAnimation || isLetterboxedAndRelaunching) {
                 applyWithNextDraw(mSetSurfacePositionConsumer);
             } else {
                 mSetSurfacePositionConsumer.accept(t);

services/tests/wmtests/src/com/android/server/wm/LetterboxUiControllerTest.java

@@ -145,7 +145,7 @@ public class LetterboxUiControllerTest extends WindowTestsBase {
         mActivity = setUpActivityWithComponent();
         mController = new LetterboxUiController(mWm, mActivity);
         prepareActivityThatShouldIgnoreRequestedOrientationDuringRelaunch();
-        mController.setRelauchingAfterRequestedOrientationChanged(false);
+        mController.setRelaunchingAfterRequestedOrientationChanged(false);
 
         spyOn(mDisplayContent.mDisplayRotationCompatPolicy);
         doReturn(true).when(mDisplayContent.mDisplayRotationCompatPolicy)
@@ -864,7 +864,7 @@ public class LetterboxUiControllerTest extends WindowTestsBase {
     private void prepareActivityThatShouldIgnoreRequestedOrientationDuringRelaunch() {
         doReturn(true).when(mLetterboxConfiguration)
                 .isPolicyForIgnoringRequestedOrientationEnabled();
-        mController.setRelauchingAfterRequestedOrientationChanged(true);
+        mController.setRelaunchingAfterRequestedOrientationChanged(true);
     }
 
     private ActivityRecord setUpActivityWithComponent() {

services/tests/wmtests/src/com/android/server/wm/SizeCompatTests.java

@@ -782,6 +782,8 @@ public class SizeCompatTests extends WindowTestsBase {
         assertEquals(window, mActivity.findMainWindow());
 
         spyOn(mActivity.mLetterboxUiController);
+        doReturn(true).when(mActivity.mLetterboxUiController)
+                .isSurfaceReadyToShow(any());
         doReturn(true).when(mActivity.mLetterboxUiController)
                 .isSurfaceVisible(any());