Rexsee API介绍：Android屏幕锁定，Keyguard函数与扩展源码

Android锁屏时会先调用onPause()；解锁时调用onResume，读入保存的应用程序的资源。如果运行程序时已经锁屏，应用程序会先调用onCreate(),然后onResume(),再则onPause()。

取消锁屏：

<uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>
KeyguardManager mKeyGuardManager = (KeyguardManager)getSystemService(KEYGUARD_SERVICE);
KeyguardLock mLock = mKeyGuardManager.newKeyguardLock("自己Activity名字");
mLock.disableKeyguard();

也是相当的简单了，但基于Rexsee的API，可以通过一句话搞定。

1. 取消锁屏：window.setTimeout('rexseeKeyguard.disable();alert(\'自动解锁！\');',10000);

alert('请按电源键关屏再开屏看到锁屏画面，10秒后自动解锁。')

2. 启动锁屏：rexseeKeyguard.reEnable();

如下是rexseeKeyguard.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.app.KeyguardManager;  
import android.app.KeyguardManager.KeyguardLock;  
import android.content.Context;  
 
public class RexseeKeyguard implements JavascriptInterface {  
 
       private static final String INTERFACE_NAME = "Keyguard";  
       @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 RexseeKeyguard(childBrowser);  
       }  
 
       private final Context mContext;  
       private final RexseeBrowser mBrowser;  
       private KeyguardLock mKeyguardLock = null;  
 
       public RexseeKeyguard(RexseeBrowser browser) {  
               mBrowser = browser;  
               mContext = browser.getContext();  
       }  
       public RexseeKeyguard(Context context) {  
               mBrowser = null;  
               mContext = context;  
       }  
 
       //JavaScript Interface  
 
       public void enable() {  
               /*  
               try {  
                       DevicePolicyManager dpm = (DevicePolicyManager) mContext.getSystemService(Context.DEVICE_POLICY_SERVICE);  
                       dpm.lockNow();  
               } catch (Exception e) {  
                       mBrowser.exception(getInterfaceName(), e);  
               }  
               */  
       }  
       public void reEnable() {  
               if (mKeyguardLock != null) {  
                       mKeyguardLock.reenableKeyguard();  
                       mKeyguardLock = null;  
               }  
       }  
       public void disable() {  
               KeyguardManager keyguardManager = (KeyguardManager) mContext.getSystemService(Context.KEYGUARD_SERVICE);  
               mKeyguardLock = keyguardManager.newKeyguardLock("");  
               mKeyguardLock.disableKeyguard();  
       }  
 
}

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%，且全部开放： http://www.rexsee.com/