Remove event listeners when touch session ends
Currently, the event listeners may still run after the touch session has
ended, which is causing NullPointerException to be thrown
Was able to reproduce this by forcing dreams to switch while swiping up
on the screen to bring up the bouncer.
Bug: 275659024
Test: atest DreamOverlayTouchMonitorTest
Change-Id: I2e47d16231e0f7297e4e7781325a6de9f8e8c948
diff --git a/packages/SystemUI/src/com/android/systemui/dreams/touch/DreamOverlayTouchMonitor.java b/packages/SystemUI/src/com/android/systemui/dreams/touch/DreamOverlayTouchMonitor.java
index 7f44463..aca621b 100644
--- a/packages/SystemUI/src/com/android/systemui/dreams/touch/DreamOverlayTouchMonitor.java
+++ b/packages/SystemUI/src/com/android/systemui/dreams/touch/DreamOverlayTouchMonitor.java
@@ -41,6 +41,7 @@
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
+import java.util.Iterator;
import java.util.Set;
import java.util.concurrent.Executor;
import java.util.function.Consumer;
@@ -195,7 +196,14 @@
* Called by the monitor when this session is removed.
*/
private void onRemoved() {
- mCallbacks.forEach(callback -> callback.onRemoved());
+ mEventListeners.clear();
+ mGestureListeners.clear();
+ final Iterator<Callback> iter = mCallbacks.iterator();
+ while (iter.hasNext()) {
+ final Callback callback = iter.next();
+ callback.onRemoved();
+ iter.remove();
+ }
}
@Override
diff --git a/packages/SystemUI/tests/src/com/android/systemui/dreams/touch/DreamOverlayTouchMonitorTest.java b/packages/SystemUI/tests/src/com/android/systemui/dreams/touch/DreamOverlayTouchMonitorTest.java
index 08427da..21397d97 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/dreams/touch/DreamOverlayTouchMonitorTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/dreams/touch/DreamOverlayTouchMonitorTest.java
@@ -269,6 +269,30 @@
}
@Test
+ public void testInputEventPropagationAfterRemoval() {
+ final DreamTouchHandler touchHandler = Mockito.mock(DreamTouchHandler.class);
+
+ final Environment environment = new Environment(Stream.of(touchHandler)
+ .collect(Collectors.toCollection(HashSet::new)));
+
+ final InputEvent initialEvent = Mockito.mock(InputEvent.class);
+ environment.publishInputEvent(initialEvent);
+
+ // Ensure session started
+ final DreamTouchHandler.TouchSession session = captureSession(touchHandler);
+ final InputChannelCompat.InputEventListener eventListener =
+ registerInputEventListener(session);
+
+ session.pop();
+ environment.executeAll();
+
+ final InputEvent event = Mockito.mock(InputEvent.class);
+ environment.publishInputEvent(event);
+
+ verify(eventListener, never()).onInputEvent(eq(event));
+ }
+
+ @Test
public void testInputGesturePropagation() {
final DreamTouchHandler touchHandler = Mockito.mock(DreamTouchHandler.class);