From 02bf9ac96cc3cc63c1ddd8cad76bdd92b07b1f6b Mon Sep 17 00:00:00 2001
From: Qi Wang <wangqi@google.com>
Date: Thu, 14 Apr 2016 17:40:23 -0700
Subject: Fix crash on accessibility service.

Change-Id: If35d4744c3ada3a3d0ae6063dd1150e309ee5c59
Fix: 27926006
(cherry picked from commit e61465686d1ee1be8297c1e758c63ca0bff8ef47)
---
 InCallUI/src/com/android/incallui/CallCardFragment.java | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/InCallUI/src/com/android/incallui/CallCardFragment.java b/InCallUI/src/com/android/incallui/CallCardFragment.java
index 785d3d3aa..39dd5eae2 100644
--- a/InCallUI/src/com/android/incallui/CallCardFragment.java
+++ b/InCallUI/src/com/android/incallui/CallCardFragment.java
@@ -45,6 +45,7 @@ import android.view.ViewPropertyAnimator;
 import android.view.ViewTreeObserver;
 import android.view.ViewTreeObserver.OnGlobalLayoutListener;
 import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityManager;
 import android.view.animation.Animation;
 import android.view.animation.AnimationUtils;
 import android.widget.ImageButton;
@@ -1154,13 +1155,21 @@ public class CallCardFragment extends BaseFragment<CallCardPresenter, CallCardPr
         mHandler.postDelayed(new Runnable() {
             @Override
             public void run() {
-                if (getView() != null && getView().getParent() != null) {
+                if (getView() != null && getView().getParent() != null &&
+                        isAccessibilityEnabled(getContext())) {
                     AccessibilityEvent event = AccessibilityEvent.obtain(
                             AccessibilityEvent.TYPE_ANNOUNCEMENT);
                     dispatchPopulateAccessibilityEvent(event);
                     getView().getParent().requestSendAccessibilityEvent(getView(), event);
                 }
             }
+
+            private boolean isAccessibilityEnabled(Context context) {
+                AccessibilityManager accessibilityManager =
+                        (AccessibilityManager) context.getSystemService(Context.ACCESSIBILITY_SERVICE);
+                return accessibilityManager != null && accessibilityManager.isEnabled();
+
+            }
         }, ACCESSIBILITY_ANNOUNCEMENT_DELAY_MS);
     }
 
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