Android的一键锁屏

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今天我要讲一下Android的一键锁屏。

这需要用到DevicePolicyMAnager【设配管理器】和ComponentName(

DevicePolicyManager 可以通过他获取设配得管理权限

【方法】

LockNow（）在这个例子中用到的、实行锁屏的动作

ComponentName 可以打开其他应用的Activity的服务、

MainActivity。Java

private DevicePolicyManager manager;
private ComponentName componentName;

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.i("---->Lock!!!","start lock");
manager = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);
componentName = new ComponentName(MainActivity.this,LockScreen.class);
//判断是否有权限
if(manager.isAdminActive(componentName)){
manager.lockNow();
//kill掉Activity 避免浪费程序
android.os.Process.killProcess(android.os.Process.myPid());
finish();
}else{
activeManager();
}
}

private void activeManager() {
//激活获取设配的权限
Intent it = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
it.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,componentName);
it.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "我的锁屏");
startActivity(it);
finish();
}

}

LockScreen.java

import android.app.admin.DeviceAdminReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class LockScreen extends DeviceAdminReceiver{ //一定要继承DeviceAdminReceiver类
public void onReceiver(Context context,Intent it){
Log.i("-----Lock","接收");
super.onReceive(context, it);
}
public void onEnabled(Context context,Intent it){
Log.i("----Lock!!1","激活");
super.onEnabled(context, it);
}
public void onDisabled(Context context,Intent it){
Log.i("-----Lock!!!","取消");
super.onDisabled(context, it);

}

}

AndroidManifest。xml文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.android.my6"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="19" />

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.android.my6.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver
android:name="com.android.my6.LockScreen"
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>
<uses-permission
android:name="android.permission.DISABLE_KEYGUARD"/>
</manifest>

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