DeskClockBackupAgent.java revision 1f53186f7d1d449382b2e429cd35e3312f9eb97e 
1/*
2 * Copyright (C) 2015 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
17package com.android.deskclock;
18
19import android.app.backup.BackupAgent;
20import android.app.backup.BackupDataInput;
21import android.app.backup.BackupDataOutput;
22import android.os.ParcelFileDescriptor;
23import android.support.annotation.NonNull;
24
25import com.android.deskclock.alarms.AlarmStateManager;
26import com.android.deskclock.provider.Alarm;
27import com.android.deskclock.provider.AlarmInstance;
28
29import java.io.File;
30import java.io.IOException;
31import java.util.Calendar;
32import java.util.List;
33
34public class DeskClockBackupAgent extends BackupAgent {
35
36    private static final String TAG = "DeskClockBackupAgent";
37
38    @Override
39    public void onBackup(ParcelFileDescriptor oldState, BackupDataOutput data,
40            ParcelFileDescriptor newState) throws IOException { }
41
42    @Override
43    public void onRestore(BackupDataInput data, int appVersionCode,
44            ParcelFileDescriptor newState) throws IOException { }
45
46    @Override
47    public void onRestoreFile(@NonNull ParcelFileDescriptor data, long size, File destination,
48            int type, long mode, long mtime) throws IOException {
49        // The preference file on the backup device may not be the same on the restore device.
50        // Massage the file name here before writing it.
51        if (destination.getName().endsWith("_preferences.xml")) {
52            final String prefFileName = getPackageName() + "_preferences.xml";
53            destination = new File(destination.getParentFile(), prefFileName);
54        }
55
56        super.onRestoreFile(data, size, destination, type, mode, mtime);
57    }
58
59    @Override
60    public void onRestoreFinished() {
61        // Now that alarms have been restored, schedule them in AlarmManager.
62        final List<Alarm> alarms = Alarm.getAlarms(getContentResolver(), null);
63
64        final Calendar now = Calendar.getInstance();
65        for (Alarm alarm : alarms) {
66            // Remove any instances that may currently exist for the alarm;
67            // these aren't relevant on the restore device and we'll recreate them below.
68            AlarmStateManager.deleteAllInstances(this, alarm.id);
69
70            if (alarm.enabled) {
71                // Create the next alarm instance to schedule.
72                AlarmInstance alarmInstance = alarm.createInstanceAfter(now);
73
74                // Add the next alarm instance to the database.
75                alarmInstance = AlarmInstance.addInstance(getContentResolver(), alarmInstance);
76
77                // Schedule the next alarm instance in AlarmManager.
78                AlarmStateManager.registerInstance(this, alarmInstance, true);
79                LogUtils.i(TAG, "DeskClockBackupAgent scheduled alarm instance: %s", alarmInstance);
80            }
81        }
82    }
83}