Merge "Insets Animations: Always dispatch onEnd when cancelled" into sc-dev am: e53e6f5c10

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15029085

Change-Id: I09617d3a91ea4e807b736d42adeaf8679b16ec50

core/java/android/view/InsetsController.java

@@ -1265,7 +1265,7 @@ public class InsetsController implements WindowInsetsController, InsetsAnimation
                     }
                     stateChanged |= getSourceConsumer(types.valueAt(j)).notifyAnimationFinished();
                 }
-                if (invokeCallback && runningAnimation.startDispatched) {
+                if (invokeCallback) {
                     dispatchAnimationEnd(runningAnimation.runner.getAnimation());
                 }
                 break;

core/java/android/view/ViewRootInsetsControllerHost.java

@@ -110,6 +110,10 @@ public class ViewRootInsetsControllerHost implements InsetsController.Host {
     @Override
     public void dispatchWindowInsetsAnimationEnd(@NonNull WindowInsetsAnimation animation) {
         if (DEBUG) Log.d(TAG, "windowInsetsAnimation ended");
+        if (mViewRoot.mView == null) {
+            // The view has already detached from window.
+            return;
+        }
         mViewRoot.mView.dispatchWindowInsetsAnimationEnd(animation);
     }
 

core/java/android/view/WindowInsetsAnimation.java

@@ -360,6 +360,13 @@ public final class WindowInsetsAnimation {
          * finished, and then revert to the starting state of the animation in the first
          * {@link #onProgress} callback by using post-layout view properties like {@link View#setX}
          * and related methods.
+         *
+         * <p>Note that the animation might be cancelled before {@link #onStart} is dispatched. On
+         * {@link android.os.Build.VERSION_CODES#S S} and later, {@link #onEnd} is immediately
+         * dispatched without an {@link #onStart} in that case.
+         * On {@link android.os.Build.VERSION_CODES#R R}, no callbacks are dispatched after
+         * {@code #onPrepare} for such an animation.
+         *
          * <p>
          * Note: If the animation is application controlled by using
          * {@link WindowInsetsController#controlWindowInsetsAnimation}, the end state of the