Android Open Source - RetroTimer Wake Lock Holder

From Project

Back to project page RetroTimer.

License

The source code is released under:

GNU General Public License

If you think the Android project RetroTimer listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

/*
 * Copyright (C) 2010-2014  Eric Hansander
 *//  ww  w . j  a v  a  2s  .co m
 *  This file is part of Retro Timer.
 *
 *  Retro Timer is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Retro Timer is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Retro Timer.  If not, see <http://www.gnu.org/licenses/>.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 *     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 se.erichansander.retrotimer;

import android.content.Context;
import android.os.PowerManager;

/**
 * Hold a wakelock that can be acquired in the AlarmReceiver and released in the
 * TimerAlert activity.
 * 
 * This file is borrowed almost without modification from the DeskClock app
 * included with Android.
 */
class WakeLockHolder {

    private static final String TAG = "WakeLockHolder";

    private static PowerManager.WakeLock sCpuWakeLock;

    public static void acquireScreenCpuWakeLock(Context context) {
        // this check basically ensures no nesting of WakeLocks, even though
        // setReferenceCounted() is left at default true.
        if (sCpuWakeLock != null) {
            return;
        }

        PowerManager pm = (PowerManager) context
                .getSystemService(Context.POWER_SERVICE);
        sCpuWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK
                | PowerManager.ACQUIRE_CAUSES_WAKEUP
                | PowerManager.ON_AFTER_RELEASE, TAG);
        sCpuWakeLock.acquire();
    }

    public static void releaseCpuLock() {
        if (sCpuWakeLock != null) {
            sCpuWakeLock.release();
            sCpuWakeLock = null;
        }
    }
}

Java Source Code List