hide launcher restore behind a flag.

enable with 'adb shell settings put secure launcher_restore_enabled 1'
before signing into wiped device

Bug: 12532845
Change-Id: I1471c39dac2e6e1412f7720b1ba8edf46273c593

3 files changed, 55 insertions, 4 deletions

diff --git a/src/com/android/launcher3/LauncherBackupAgentHelper.java b/src/com/android/launcher3/LauncherBackupAgentHelper.java
index 83e4a60d4..876cf0887 100644
--- a/src/com/android/launcher3/LauncherBackupAgentHelper.java
+++ b/src/com/android/launcher3/LauncherBackupAgentHelper.java
@@ -21,6 +21,7 @@ import android.app.backup.BackupManager;
 import android.app.backup.SharedPreferencesBackupHelper;
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.provider.Settings;
 
 public class LauncherBackupAgentHelper extends BackupAgentHelper {
 
@@ -28,6 +29,8 @@ public class LauncherBackupAgentHelper extends BackupAgentHelper {
 
     private static BackupManager sBackupManager;
 
+    protected static final String SETTING_RESTORE_ENABLED = "launcher_restore_enabled";
+
     /**
      * Notify the backup manager that out database is dirty.
      *
@@ -54,9 +57,15 @@ public class LauncherBackupAgentHelper extends BackupAgentHelper {
 
     @Override
     public void onCreate() {
+
+        boolean restoreEnabled = 0 != Settings.Secure.getInt(
+                getContentResolver(), SETTING_RESTORE_ENABLED, 0);
+
         addHelper(LauncherBackupHelper.LAUNCHER_PREFS_PREFIX,
-                new SharedPreferencesBackupHelper(this,
-                        LauncherAppState.getSharedPreferencesKey()));
-        addHelper(LauncherBackupHelper.LAUNCHER_PREFIX, new LauncherBackupHelper(this));
+                new LauncherPreferencesBackupHelper(this,
+                        LauncherAppState.getSharedPreferencesKey(),
+                        restoreEnabled));
+        addHelper(LauncherBackupHelper.LAUNCHER_PREFIX,
+                new LauncherBackupHelper(this, restoreEnabled));
     }
 }
diff --git a/src/com/android/launcher3/LauncherBackupHelper.java b/src/com/android/launcher3/LauncherBackupHelper.java
index fa6a3188a..5b722c1d3 100644
--- a/src/com/android/launcher3/LauncherBackupHelper.java
+++ b/src/com/android/launcher3/LauncherBackupHelper.java
@@ -138,12 +138,15 @@ public class LauncherBackupHelper implements BackupHelper {
 
     private final Context mContext;
 
+    private final boolean mRestoreEnabled;
+
     private HashMap<ComponentName, AppWidgetProviderInfo> mWidgetMap;
 
     private ArrayList<Key> mKeys;
 
-    public LauncherBackupHelper(Context context) {
+    public LauncherBackupHelper(Context context, boolean restoreEnabled) {
         mContext = context;
+        mRestoreEnabled = restoreEnabled;
     }
 
     private void dataChanged() {
diff --git a/src/com/android/launcher3/LauncherPreferencesBackupHelper.java b/src/com/android/launcher3/LauncherPreferencesBackupHelper.java
new file mode 100644
index 000000000..1ac6ff962
--- /dev/null
+++ b/src/com/android/launcher3/LauncherPreferencesBackupHelper.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3;
+
+import android.app.backup.BackupDataInputStream;
+import android.app.backup.SharedPreferencesBackupHelper;
+import android.content.Context;
+
+public class LauncherPreferencesBackupHelper extends SharedPreferencesBackupHelper {
+
+    private final boolean mRestoreEnabled;
+
+    public LauncherPreferencesBackupHelper(Context context,  String sharedPreferencesKey,
+            boolean restoreEnabled) {
+        super(context, sharedPreferencesKey);
+        mRestoreEnabled = restoreEnabled;
+    }
+
+    @Override
+    public void restoreEntity(BackupDataInputStream data) {
+        if (mRestoreEnabled) {
+            super.restoreEntity(data);
+        }
+    }
+}