added null check in doInBackground and if null, properly intializes

variables.

Bug:29234237
Change-Id: I1d65b1a232c71efdd11a917769aec5044867a085
(cherry picked from commit 0f0f5414f4860de7f5e98d783b3172a39a42df2f)

1 files changed, 7 insertions, 0 deletions

diff --git a/packages/SettingsLib/src/com/android/settingslib/drawer/SettingsDrawerActivity.java b/packages/SettingsLib/src/com/android/settingslib/drawer/SettingsDrawerActivity.java
index ce916cba312a..37e3c531229a 100644
--- a/packages/SettingsLib/src/com/android/settingslib/drawer/SettingsDrawerActivity.java
+++ b/packages/SettingsLib/src/com/android/settingslib/drawer/SettingsDrawerActivity.java
@@ -308,6 +308,13 @@ public class SettingsDrawerActivity extends Activity {
         }
 
         @Override
+        protected void onPreExecute() {
+            if (sConfigTracker == null || sTileCache == null) {
+                getDashboardCategories();
+            }
+        }
+
+        @Override
         protected void onPostExecute(List<DashboardCategory> dashboardCategories) {
             for (int i = 0; i < dashboardCategories.size(); i++) {
                 DashboardCategory category = dashboardCategories.get(i);