在Android中，WakeLock可以让进程持续执行，即使手机关屏、进入睡眠模式。。基于Rexsee的WakeLock扩展可以使用JS实现。。
【函数】 void acquire(boolean onAfterRelease)
【说明】 点亮屏幕直到release()被调用。
【参数】 onAfterRelease：在release()被调用后是否继续点亮至默认的屏幕超时。
【示例】
window.setTimeout('rexseeKeyguard.disable();rexseeWakeLock.acquire(false);alert(\'点亮屏幕！\');',5000);
alert('请按电源键关屏，5秒后自动亮屏。');
【函数】 void release()
【说明】 允许黑屏，如果调用的acquire()函数携带了参数true则仍需等待默认的屏幕超时时间后才会黑屏。
【示例】
rexseeWakeLock.release();
rexseeWakeLock.java源码
/*
* Copyright (C) 2011 The Rexsee Open Source Project
*
* Licensed under the Rexsee License, Version 1.0 (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.rexsee.com/CN/legal/license.html
*
* 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 rexsee.core.alarm;
import rexsee.core.browser.JavascriptInterface;
import rexsee.core.browser.RexseeBrowser;
import android.content.Context;
import android.os.PowerManager;
public class RexseeWakeLock implements JavascriptInterface {
private static final String INTERFACE_NAME = "WakeLock";
@Override
public String getInterfaceName() {
return mBrowser.application.resources.prefix + INTERFACE_NAME;
}
@Override
public JavascriptInterface getInheritInterface(RexseeBrowser childBrowser) {
return this;
}
@Override
public JavascriptInterface getNewInterface(RexseeBrowser childBrowser) {
return new RexseeWakeLock(childBrowser);
}
private final Context mContext;
private final RexseeBrowser mBrowser;
private PowerManager.WakeLock mWakeLock = null;
public RexseeWakeLock(RexseeBrowser browser) {
mBrowser = browser;
mContext = browser.getContext();
}
public RexseeWakeLock(Context context) {
mBrowser = null;
mContext = context;
}
//JavaScript interface
public void acquire(boolean onAfterRelease) {
release();
PowerManager pm = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
int mode = PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP;
if (onAfterRelease) {
mode = mode | PowerManager.ON_AFTER_RELEASE;
}
mWakeLock = pm.newWakeLock(mode, "");
mWakeLock.acquire();
}
public void release() {
if (mWakeLock != null) {
mWakeLock.release();
mWakeLock = null;
}
}
}
仅对Rexsee的源码和函数事件做了整理，相关的demo或源码解析可以在Rexsee社区了解，目前Rexsee已提供了近2000个扩展，覆盖Android原生功能超过90%
