From a944ee2a024f5aae9a6e1075b9636ba3be84575d Mon Sep 17 00:00:00 2001
From: Zaiyue Xue <xuezaiyue@google.com>
Date: Wed, 14 Dec 2022 15:33:34 +0800
Subject: [PATCH] Fix b/262378515: NullPointerException in
 TabPreference.onDetached()

Bug: 262378515
Fix: 262378515
Test: presubmit
Change-Id: I9c0629d570538a664c361eae74e8f7818f4210df
---
 .../android/settings/fuelgauge/batteryusage/TabPreference.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/com/android/settings/fuelgauge/batteryusage/TabPreference.java b/src/com/android/settings/fuelgauge/batteryusage/TabPreference.java
index 517e01cf565..0c5a69977e4 100644
--- a/src/com/android/settings/fuelgauge/batteryusage/TabPreference.java
+++ b/src/com/android/settings/fuelgauge/batteryusage/TabPreference.java
@@ -87,7 +87,7 @@ public class TabPreference extends Preference {
     @Override
     public void onDetached() {
         super.onDetached();
-        if (mOnPageChangeCallback != null) {
+        if (mViewPager != null && mOnPageChangeCallback != null) {
             mViewPager.unregisterOnPageChangeCallback(mOnPageChangeCallback);
         }
     }