Merge "Add a delay to rotation updates to help avoid fold state race" into tm-qpr-dev am: d094fe2516

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22122422

Change-Id: Ice00437ee103a84c8cb70e0acc0b08b0078baf6e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

2 files changed, 9 insertions, 7 deletions

diff --git a/services/core/java/com/android/server/wm/DisplayRotation.java b/services/core/java/com/android/server/wm/DisplayRotation.java
index 27e33b08d936..e9569d8cc064 100644
--- a/services/core/java/com/android/server/wm/DisplayRotation.java
+++ b/services/core/java/com/android/server/wm/DisplayRotation.java
@@ -87,6 +87,8 @@ import java.util.Set;
  */
 public class DisplayRotation {
     private static final String TAG = TAG_WITH_CLASS_NAME ? "DisplayRotation" : TAG_WM;
+    // Delay to avoid race between fold update and orientation update.
+    private static final int ORIENTATION_UPDATE_DELAY_MS = 800;
 
     // Delay in milliseconds when updating config due to folding events. This prevents
     // config changes and unexpected jumps while folding the device to closed state.
@@ -1743,15 +1745,15 @@ public class DisplayRotation {
                 mDeviceState = newState;
                 // Now mFoldState is set to HALF_FOLDED, the overrideFrozenRotation function will
                 // return true, so rotation is unlocked.
-                mService.updateRotation(false /* alwaysSendConfiguration */,
-                        false /* forceRelayout */);
             } else {
                 mInHalfFoldTransition = true;
                 mDeviceState = newState;
-                // Tell the device to update its orientation.
-                mService.updateRotation(false /* alwaysSendConfiguration */,
-                        false /* forceRelayout */);
             }
+            UiThread.getHandler().postDelayed(
+                    () -> {
+                        mService.updateRotation(false /* alwaysSendConfiguration */,
+                                false /* forceRelayout */);
+                    }, ORIENTATION_UPDATE_DELAY_MS);
             // Alert the activity of possible new bounds.
             UiThread.getHandler().removeCallbacks(mActivityBoundsUpdateCallback);
             UiThread.getHandler().postDelayed(mActivityBoundsUpdateCallback,
diff --git a/services/tests/wmtests/src/com/android/server/wm/DisplayRotationTests.java b/services/tests/wmtests/src/com/android/server/wm/DisplayRotationTests.java
index 192274317173..26d2a46f768a 100644
--- a/services/tests/wmtests/src/com/android/server/wm/DisplayRotationTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/DisplayRotationTests.java
@@ -750,7 +750,7 @@ public class DisplayRotationTests {
         // ... until half-fold
         mTarget.foldStateChanged(DeviceStateController.DeviceState.HALF_FOLDED);
         assertTrue(waitForUiHandler());
-        verify(sMockWm).updateRotation(false, false);
+        verify(sMockWm).updateRotation(anyBoolean(), anyBoolean());
         assertTrue(waitForUiHandler());
         assertEquals(Surface.ROTATION_0, mTarget.rotationForOrientation(
                 SCREEN_ORIENTATION_UNSPECIFIED, Surface.ROTATION_0));
@@ -758,7 +758,7 @@ public class DisplayRotationTests {
         // ... then transition back to flat
         mTarget.foldStateChanged(DeviceStateController.DeviceState.OPEN);
         assertTrue(waitForUiHandler());
-        verify(sMockWm, atLeast(1)).updateRotation(false, false);
+        verify(sMockWm, atLeast(1)).updateRotation(anyBoolean(), anyBoolean());
         assertTrue(waitForUiHandler());
         assertEquals(Surface.ROTATION_270, mTarget.rotationForOrientation(
                 SCREEN_ORIENTATION_UNSPECIFIED, Surface.ROTATION_0));