Rexsee API介紹：Android WakeLock進程持續，阻止應用休眠

在Android中，WakeLock可讓進程持續執行，即便手機關屏、進入睡眠模式。。基於Rexsee的WakeLock擴展可使用JS實現。。

【函數】 void acquire(boolean onAfterRelease)

【說明】 點亮屏幕直到release()被調用。

【參數】 onAfterRelease：在release()被調用後是否繼續點亮至默認的屏幕超時。

【示例】

window.setTimeout('rexseeKeyguard.disable();rexseeWakeLock.acquire(false);alert(\'點亮屏幕！\');',5000);
alert('請按電源鍵關屏，5秒後自動亮屏。');

【函數】 void release()

【說明】 容許黑屏，若是調用的acquire()函數攜帶了參數true則仍需等待默認的屏幕超時時間後纔會黑屏。

【示例】

rexseeWakeLock.release();

rexseeWakeLock.java源碼

/* 
* 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;  
               }  
       }  
 
}

僅對Rexsee的源碼和函數事件作了整理，相關的demo或源碼解析能夠在Rexsee社區瞭解，目前Rexsee已提供了近2000個擴展，覆蓋Android原生功能超過90%，且所有開放： http://www.rexsee.com/