调用系统的锁屏功能锁定屏幕

调用系统的锁屏Demo

程序运行后：
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点击激活设备管理权限按钮显示如下：
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点击Activate后，然后点击系统锁使用按钮，界面如下：
[img]

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工程结构图：
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AdminReceiver

package com.amaker.lock;

import android.app.admin.DeviceAdminReceiver;
import android.app.admin.DevicePolicyManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class AdminReceiver extends DeviceAdminReceiver {
	@Override
	public DevicePolicyManager getManager(Context context) {
		Log.i("XiaoMaGuo", "调用了getManager()方法");
		return super.getManager(context);
	}
	@Override
	public ComponentName getWho(Context context) {
		Log.i("XiaoMaGuo", "调用了getWho()方法");
		return super.getWho(context);
	}
	
	/**
	 * 禁用
	 */
	@Override
	public void onDisabled(Context context, Intent intent) {
		Log.i("XiaoMaGuo", "调用了onDisabled()方法");
		Toast.makeText(context, "禁用设备管理", Toast.LENGTH_SHORT).show();
		
		super.onDisabled(context, intent);
	}
	@Override
	public CharSequence onDisableRequested(Context context, Intent intent) {
		Log.i("XiaoMaGuo", "调用了onDisableRequested()方法");
		return super.onDisableRequested(context, intent);
	}
	
	/**
	 * 激活
	 */
	@Override
	public void onEnabled(Context context, Intent intent) {
		Log.i("XiaoMaGuo", "调用了onEnabled()方法");
		Toast.makeText(context, "启动设备管理", Toast.LENGTH_SHORT).show();
		
		super.onEnabled(context, intent);
	}
	@Override
	public void onPasswordChanged(Context context, Intent intent) {
		Log.i("XiaoMaGuo", "调用了onPasswordChanged()方法");
		super.onPasswordChanged(context, intent);
	}
	@Override
	public void onPasswordFailed(Context context, Intent intent) {
		Log.i("XiaoMaGuo", "调用了onPasswordFailed()方法");
		super.onPasswordFailed(context, intent);
	}
	@Override
	public void onPasswordSucceeded(Context context, Intent intent) {
		Log.i("XiaoMaGuo", "调用了onPasswordSucceeded()方法");
		super.onPasswordSucceeded(context, intent);
	}
	@Override
	public void onReceive(Context context, Intent intent) {
		Log.i("XiaoMaGuo", "调用了onReceive()方法");
		super.onReceive(context, intent);
	}
	@Override
	public IBinder peekService(Context myContext, Intent service) {
		Log.i("XiaoMaGuo", "调用了peekService()方法");
		return super.peekService(myContext, service);
	}
	
}

DevicePolicyManagerDemoActivity

package com.amaker.lock;
import android.app.Activity;
import android.app.admin.DevicePolicyManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;


/**  
* @Title: DevicePolicyManagerDemoActivity.java
* @Package com.xiaoma.www
* @Description: 屏幕锁测试
* @author MZH
* @version V2.2
*/
public class DevicePolicyManagerDemoActivity extends Activity {
	
	private Button startPermissionBtn;
	private Button stopPermissionBtn;
	private Button sysLockBtn;
	
	private DevicePolicyManager dpm;
	private ComponentName componentName ;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //初始化
        init();
    }
    
    /**
     * 初始化实现
     */
    private void init(){
    	//资源声明定位
    	startPermissionBtn = (Button)findViewById(R.id.button1);
    	stopPermissionBtn = (Button)findViewById(R.id.button2);
    	sysLockBtn = (Button)findViewById(R.id.button3);
    	
    	startPermissionBtn.setOnClickListener(listener);
    	stopPermissionBtn.setOnClickListener(listener);
    	sysLockBtn.setOnClickListener(listener);
    	
    	//取得系统服务
    	dpm  = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);
    	componentName = new ComponentName(this, AdminReceiver.class);
    	
    }
    
    
    /**
     * 按钮监听器的实现,此处小马讲下，在实现监听的时候不要在一个分支里面写太多逻辑处理
     * 分支只负责分支，不负责处理，要处理的话可以模块化，处理函数抽出去就可以了
     * 小马希望大家从一开始就养成个好习惯，吼吼。。
     */
    private OnClickListener listener = new OnClickListener() {
		@Override
		public void onClick(View v) {
			//以下是三个按钮分别处理的事件实现
			switch (v.getId()) {
			case R.id.button1:
				//开启设备权限
				startDeviceManager();
				break;
			case R.id.button2:
				//停止设备权限
				stopDeviceManager();
				break;
			case R.id.button3:
				//调用系统锁
				sysLock();
				break;
			default:
				break;
			}
		}
	};
	
	/**
	 * 启动设备管理权限
	 */
	private void startDeviceManager(){
		//添加一个隐式意图，完成设备权限的添加 
		//这个Intent (DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN)跳转到 权限提醒页面
		//并传递了两个参数EXTRA_DEVICE_ADMIN 、 EXTRA_ADD_EXPLANATION
		Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
		
		//权限列表
		//EXTRA_DEVICE_ADMIN参数中说明了用到哪些权限， 
        intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, componentName);
        
        //描述(additional explanation)
        //EXTRA_ADD_EXPLANATION参数为附加的说明
        intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "--小马坏，小马爱，小马瓜瓜怪--");
        
        startActivityForResult(intent, 0);
        
		}
	
	/**
	 * 禁用设备管理权限方法实现
	 */
	private void stopDeviceManager(){
		Log.i("XiaoMaGuo","------ unActiveManage ------");
		boolean active = dpm.isAdminActive(componentName);
        if (active) {
        	dpm.removeActiveAdmin(componentName);
        }
	}
	
	/**
	 * 调用系统锁方法实现
	 */
	private void sysLock(){
        boolean active = dpm.isAdminActive(componentName);
        if (active) {
        	dpm.lockNow();
        }
	}
	
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="激活设备管理权限" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="禁用设备管理权限" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="系统锁使用" />

</LinearLayout>

lockourscreen.xml

<?xml version="1.0" encoding="UTF-8"?>
<device-admin
  xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-policies>
    	<!-- 强行锁定 -->
        <force-lock />
        
        <!--  因为今天我们只讲下简单的，所以其它的权限，小马先暂时注释掉咯，有兴趣的朋友们可以打开自己试下-->
        	 <!-- 清除所有数据（恢复出厂设置）-->
        	 <wipe-data /> 
        	 <!-- 重置密码 -->
       		 <reset-password />
        	 <!-- 限制密码选择-->
        	 <limit-password /> 
        	 <!-- 监控登录尝试 -->
          	 <watch-login />
        
    </uses-policies>
</device-admin>

配置文件：

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

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name="com.amaker.lock.DevicePolicyManagerDemoActivity"
            android:label="欢迎跟小马一起交流学习" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
        <receiver
            android:name=".AdminReceiver"
            android:description="@string/description"
            android:label="@string/labelValue"
            android:permission="android.permission.BIND_DEVICE_ADMIN"
            >
             <meta-data 
                android:name="android.app.device_admin"
				android:resource="@xml/lockourscreen"/>
			<intent-filter>
				<action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
			</intent-filter>
            
        </receiver>
    </application>

</manifest>