From f0ef89a522fb62f0cb22fb75a41b2f4a8873b023 Mon Sep 17 00:00:00 2001
From: Tiger Huang <tigerhuang@google.com>
Date: Thu, 13 Feb 2020 16:07:01 +0800
Subject: [PATCH] Abort dispatching animation callbacks if the root view is
 gone

This CL prevents possible NullPointerExceptions.

Bug: 118118435
Bug: 149479853
Test: atest AnimatedVectorDrawableParameterizedTest
Change-Id: I966a15c0886b80317a34541fb315b2886981af16
---
 core/java/android/view/InsetsController.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/core/java/android/view/InsetsController.java b/core/java/android/view/InsetsController.java
index 54de1bb3739d7..943572f56a1b6 100644
--- a/core/java/android/view/InsetsController.java
+++ b/core/java/android/view/InsetsController.java
@@ -39,7 +39,6 @@ import android.util.Log;
 import android.util.Pair;
 import android.util.Property;
 import android.util.SparseArray;
-import android.view.InputDevice.MotionRange;
 import android.view.InsetsSourceConsumer.ShowResult;
 import android.view.InsetsState.InternalInsetsType;
 import android.view.SurfaceControl.Transaction;
@@ -855,6 +854,9 @@ public class InsetsController implements WindowInsetsController, InsetsAnimation
         } else {
             hideDirectly(types);
         }
+        if (mViewRoot.mView == null) {
+            return;
+        }
         mViewRoot.mView.dispatchWindowInsetsAnimationPrepare(animation);
         mViewRoot.mView.getViewTreeObserver().addOnPreDrawListener(new OnPreDrawListener() {
             @Override