From 8dd4d35aa33652adda822919de369fbd7efbeed6 Mon Sep 17 00:00:00 2001
From: Kensuke Matsui <kensuke.matsui@sony.com>
Date: Fri, 21 Jul 2017 17:35:10 +0900
Subject: [PATCH] Fix NPE in StatusBar#onBackPressed()

StatusBar.mKeyguardUserSwitcher is instantiated
only if multi user function is enabled.
But mKeyguardUserSwitcher.hideIfNotSimple() is invoked
without null check in StatusBar#onBackPressed().
This causes NPE on multi user disabled devices.

Fixes: 65391930
Test: manual - tap Back key on lockscreen

Change-Id: I528823fa832ee5096d73dea660997fc276d86c5c
---
 .../src/com/android/systemui/statusbar/phone/StatusBar.java     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
index f58fe8290a438..55498af7a54b0 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
@@ -4486,7 +4486,7 @@ public class StatusBar extends SystemUI implements DemoMode,
             animateCollapsePanels();
             return true;
         }
-        if (mKeyguardUserSwitcher.hideIfNotSimple(true)) {
+        if (mKeyguardUserSwitcher != null && mKeyguardUserSwitcher.hideIfNotSimple(true)) {
             return true;
         }
         return false;