From 255b008afe262050a421e02ccb00068665ea7e4f Mon Sep 17 00:00:00 2001
From: Adam Powell <adamp@google.com>
Date: Thu, 18 Feb 2016 15:17:29 -0800
Subject: [PATCH] Fix NPE for Fragment#setUserVisibleHint(true)

Fix a bug where calling setUserVisibleHint(true) before adding a
Fragment to a FragmentManager could cause a crash.

Bug 27250018

Change-Id: Id192ae31bab95f15d32de9f105e707bdb8691641
---
 core/java/android/app/Fragment.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/java/android/app/Fragment.java b/core/java/android/app/Fragment.java
index 02a898b33dd1a..8fcc54f88d6a7 100644
--- a/core/java/android/app/Fragment.java
+++ b/core/java/android/app/Fragment.java
@@ -1033,7 +1033,7 @@ public class Fragment implements ComponentCallbacks2, OnCreateContextMenuListene
      *                        false if it is not.
      */
     public void setUserVisibleHint(boolean isVisibleToUser) {
-        if (!mUserVisibleHint && isVisibleToUser && mState < STARTED) {
+        if (!mUserVisibleHint && isVisibleToUser && mState < STARTED && mFragmentManager != null) {
             mFragmentManager.performPendingDeferredStart(this);
         }
         mUserVisibleHint = isVisibleToUser;