From 59e1e6425861a91d82e9f8dbc2d840e7cea07169 Mon Sep 17 00:00:00 2001
From: Tsung-Mao Fang <tmfang@google.com>
Date: Wed, 12 Feb 2020 18:10:45 +0800
Subject: [PATCH] Handle null case in AppStateAppOpsBridge

AppStateAppOpsBridge#getEntries returns null if no app
is requesting AppStateAppOpsBridge#mPermissions,
which would cause the settings app to crash in
AppStateAppOpsBridge#loadAllExtraInfo or
AppStateAppOpsBridge#loadAppOpsStates.

Try to skip null case here and set null for extraInfo
when we get null from AppStateAppOpsBridge#getEntries.

Change-Id: Iac03ec11869eeac62fa055da26b4b7a10dc65bb8
Fix: 147479269
Test: Open All files access and no crash.
---
 ...anage_external_storage_permission_details.xml | 11 +++++++----
 .../applications/AppStateAppOpsBridge.java       | 16 +++++++++++++---
 2 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/res/xml/manage_external_storage_permission_details.xml b/res/xml/manage_external_storage_permission_details.xml
index b540ff6687c..29ff297b8c2 100644
--- a/res/xml/manage_external_storage_permission_details.xml
+++ b/res/xml/manage_external_storage_permission_details.xml
@@ -14,7 +14,9 @@
      limitations under the License.
 -->
 
-<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+<PreferenceScreen
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:settings="http://schemas.android.com/apk/res-auto"
     android:key="manage_external_storage_permission_details"
     android:title="@string/manage_external_storage_title">
 
@@ -22,8 +24,9 @@
         android:key="app_ops_settings_switch"
         android:title="@string/permit_manage_external_storage"/>
 
-    <Preference
-        android:summary="@string/allow_manage_external_storage_description"
-        android:selectable="false"/>
+    <com.android.settingslib.widget.FooterPreference
+        android:title="@string/allow_manage_external_storage_description"
+        android:selectable="false"
+        settings:searchable="false"/>
 
 </PreferenceScreen>
diff --git a/src/com/android/settings/applications/AppStateAppOpsBridge.java b/src/com/android/settings/applications/AppStateAppOpsBridge.java
index 8c001d841f1..b4f6e483711 100755
--- a/src/com/android/settings/applications/AppStateAppOpsBridge.java
+++ b/src/com/android/settings/applications/AppStateAppOpsBridge.java
@@ -61,6 +61,7 @@ public abstract class AppStateAppOpsBridge extends AppStateBaseBridge {
         this(context, appState, callback, appOpsOpCode, permissions,
                 AppGlobals.getPackageManager());
     }
+
     AppStateAppOpsBridge(Context context, ApplicationsState appState, Callback callback,
             int[] appOpsOpCodes, String[] permissions) {
         this(context, appState, callback, appOpsOpCodes, permissions,
@@ -70,9 +71,10 @@ public abstract class AppStateAppOpsBridge extends AppStateBaseBridge {
     @VisibleForTesting
     AppStateAppOpsBridge(Context context, ApplicationsState appState, Callback callback,
             int appOpsOpCode, String[] permissions, IPackageManager packageManager) {
-        this(context, appState, callback, new int[] {appOpsOpCode}, permissions,
+        this(context, appState, callback, new int[]{appOpsOpCode}, permissions,
                 packageManager);
     }
+
     AppStateAppOpsBridge(Context context, ApplicationsState appState, Callback callback,
             int[] appOpsOpCodes, String[] permissions, IPackageManager packageManager) {
         super(appState, callback);
@@ -155,8 +157,12 @@ public abstract class AppStateAppOpsBridge extends AppStateBaseBridge {
         for (int i = 0; i < N; i++) {
             AppEntry app = apps.get(i);
             int userId = UserHandle.getUserId(app.info.uid);
-            ArrayMap<String, PermissionState> userMap = entries.get(userId);
-            app.extraInfo = userMap != null ? userMap.get(app.info.packageName) : null;
+            if (entries != null) {
+                ArrayMap<String, PermissionState> userMap = entries.get(userId);
+                app.extraInfo = userMap != null ? userMap.get(app.info.packageName) : null;
+            } else {
+                app.extraInfo = null;
+            }
         }
     }
 
@@ -247,6 +253,10 @@ public abstract class AppStateAppOpsBridge extends AppStateBaseBridge {
      * a particular package.
      */
     private void loadAppOpsStates(SparseArray<ArrayMap<String, PermissionState>> entries) {
+        if (entries == null) {
+            return;
+        }
+
         // Find out which packages have been granted permission from AppOps.
         final List<AppOpsManager.PackageOps> packageOps = mAppOpsManager.getPackagesForOps(
                 mAppOpsOpCodes);