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.deskclock;
18 
19 import android.content.Context;
20 import android.os.PowerManager;
21 
22 /**
23  * Utility class to hold wake lock in app.
24  */
25 public class AlarmAlertWakeLock {
26 
27     private static final String TAG = "AlarmAlertWakeLock";
28 
29     private static PowerManager.WakeLock sCpuWakeLock;
30 
createPartialWakeLock(Context context)31     public static PowerManager.WakeLock createPartialWakeLock(Context context) {
32         PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
33         return pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
34     }
35 
acquireCpuWakeLock(Context context)36     public static void acquireCpuWakeLock(Context context) {
37         if (sCpuWakeLock != null) {
38             return;
39         }
40 
41         sCpuWakeLock = createPartialWakeLock(context);
42         sCpuWakeLock.acquire();
43     }
44 
acquireScreenCpuWakeLock(Context context)45     public static void acquireScreenCpuWakeLock(Context context) {
46         if (sCpuWakeLock != null) {
47             return;
48         }
49         PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
50         sCpuWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK
51                 | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE, TAG);
52         sCpuWakeLock.acquire();
53     }
54 
releaseCpuLock()55     public static void releaseCpuLock() {
56         if (sCpuWakeLock != null) {
57             sCpuWakeLock.release();
58             sCpuWakeLock = null;
59         }
60     }
61 }
62