/* * Copyright (C) 2008 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.alarmclock;import android.content.Context;import android.os.PowerManager;/** * Hold a wakelock that can be acquired in the AlarmReceiver and * released in the AlarmAlert activity */class AlarmAlertWakeLock {    private static PowerManager.WakeLock sWakeLock;    static void acquire(Context context) {        if (sWakeLock != null) {            sWakeLock.release();        }        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);        sWakeLock = pm.newWakeLock(                PowerManager.FULL_WAKE_LOCK |                PowerManager.ACQUIRE_CAUSES_WAKEUP |                PowerManager.ON_AFTER_RELEASE, Log.LOGTAG);        sWakeLock.acquire();    }    static void release() {        if (Log.LOGV) Log.v("AlarmAlertWakeLock release");        if (sWakeLock != null) {            sWakeLock.release();            sWakeLock = null;        }    }}