Android编程实现一键锁屏的方法

下面是设备管理器类LockReceiver,这是一个继承自DeviceAdminReceiver的类,可以接收到激活/接触激活的广播,进行下一步操作,本程序中,只是简单打印一下信息.

import android.app.admin.DeviceAdminReceiver; 
import android.content.Context; 
import android.content.Intent; 
public class LockReceiver extends DeviceAdminReceiver{ 
  @Override 
  public void onReceive(Context context, Intent intent) { 
    super.onReceive(context, intent); 
    System.out.println("onreceiver"); 
  } 
  @Override 
  public void onEnabled(Context context, Intent intent) { 
    System.out.println("激活使用"); 
    super.onEnabled(context, intent); 
  } 
  @Override 
  public void onDisabled(Context context, Intent intent) { 
    System.out.println("取消激活"); 
    super.onDisabled(context, intent); 
  } 
} 

主配置文件:

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://www.easck.com/apk/res/android" 
  package="com.iceman.test" 
  android:versionCode="1" 
  android:versionName="1.0" > 
  <uses-sdk android:minSdkVersion="9" /> 
  <application 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" > 
    <activity 
      android:name=".LockActivity" 
      android:label="@string/app_name" 
      android:theme="@android:style/Theme.Translucent" > 
      <intent-filter> 
        <action android:name="android.intent.action.MAIN" /> 
        <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
    </activity> 
    <receiver 
      android:name=".LockReceiver" 
      android:description="@string/app_name" 
      android:label="@string/app_name" 
      android:permission="android.permission.BIND_DEVICE_ADMIN" > 
      <meta-data 
        android:name="android.app.device_admin" 
        android:resource="@xml/lock_screen" /> 
      <intent-filter> 
        <action android:name="android.app.action.DEVICE_ADMIN_ENABLED" /> 
      </intent-filter> 
    </receiver> 
  </application> 
</manifest> 

其中lock_screen是设备管理器的权限声明,需要在res/xml目录下以xml文件形式定义