1 /*
2  * Copyright (C) 2008 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.inputmethod.latin;
18 
19 import android.app.backup.BackupAgentHelper;
20 import android.app.backup.BackupDataInput;
21 import android.app.backup.SharedPreferencesBackupHelper;
22 import android.content.SharedPreferences;
23 import android.os.ParcelFileDescriptor;
24 
25 import com.android.inputmethod.latin.settings.LocalSettingsConstants;
26 
27 import java.io.IOException;
28 
29 /**
30  * Backup/restore agent for LatinIME.
31  * Currently it backs up the default shared preferences.
32  */
33 public final class BackupAgent extends BackupAgentHelper {
34     private static final String PREF_SUFFIX = "_preferences";
35 
36     @Override
onCreate()37     public void onCreate() {
38         addHelper("shared_pref", new SharedPreferencesBackupHelper(this,
39                 getPackageName() + PREF_SUFFIX));
40     }
41 
42     @Override
onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState)43     public void onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState)
44             throws IOException {
45         // Let the restore operation go through
46         super.onRestore(data, appVersionCode, newState);
47 
48         // Remove the preferences that we don't want restored.
49         final SharedPreferences.Editor prefEditor = getSharedPreferences(
50                 getPackageName() + PREF_SUFFIX, MODE_PRIVATE).edit();
51         for (final String key : LocalSettingsConstants.PREFS_TO_SKIP_RESTORING) {
52             prefEditor.remove(key);
53         }
54         // Flush the changes to disk.
55         prefEditor.commit();
56     }
57 }
58