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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.launcher3;
     18 
     19 import android.app.backup.BackupAgentHelper;
     20 import android.app.backup.BackupManager;
     21 import android.app.backup.SharedPreferencesBackupHelper;
     22 import android.content.Context;
     23 import android.content.SharedPreferences;
     24 import android.provider.Settings;
     25 import android.util.Log;
     26 
     27 public class LauncherBackupAgentHelper extends BackupAgentHelper {
     28 
     29     private static final String TAG = "LauncherBackupAgentHelper";
     30     static final boolean VERBOSE = true;
     31     static final boolean DEBUG = false;
     32 
     33     private static BackupManager sBackupManager;
     34 
     35     protected static final String SETTING_RESTORE_ENABLED = "launcher_restore_enabled";
     36 
     37     /**
     38      * Notify the backup manager that out database is dirty.
     39      *
     40      * <P>This does not force an immediate backup.
     41      *
     42      * @param context application context
     43      */
     44     public static void dataChanged(Context context) {
     45         if (sBackupManager == null) {
     46             sBackupManager = new BackupManager(context);
     47         }
     48         sBackupManager.dataChanged();
     49     }
     50 
     51     @Override
     52     public void onDestroy() {
     53         // There is only one process accessing this preference file, but the restore
     54         // modifies the file outside the normal codepaths, so it looks like another
     55         // process.  This forces a reload of the file, in case this process persists.
     56         String spKey = LauncherAppState.getSharedPreferencesKey();
     57         SharedPreferences sp = getSharedPreferences(spKey, Context.MODE_MULTI_PROCESS);
     58         super.onDestroy();
     59     }
     60 
     61     @Override
     62     public void onCreate() {
     63         boolean restoreEnabled = 0 != Settings.Secure.getInt(
     64                 getContentResolver(), SETTING_RESTORE_ENABLED, 0);
     65         if (VERBOSE) Log.v(TAG, "restore is " + (restoreEnabled ? "enabled" : "disabled"));
     66 
     67         addHelper(LauncherBackupHelper.LAUNCHER_PREFS_PREFIX,
     68                 new LauncherPreferencesBackupHelper(this,
     69                         LauncherAppState.getSharedPreferencesKey(),
     70                         restoreEnabled));
     71         addHelper(LauncherBackupHelper.LAUNCHER_PREFIX,
     72                 new LauncherBackupHelper(this, restoreEnabled));
     73     }
     74 }
     75