package com.andy.lockscreen; 
 
import android.app.admin.DeviceAdminReceiver; 
 
/** 
 * @author Zhang,Tianyou 
 * @version 2014年11月20日 下午9:51:42 
 * 
 * 特殊的廣播接受者 接收 管理員權(quán)限廣播 
 */ 
 
public class MyAdmin extends DeviceAdminReceiver{ 
 
} 

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
  package="com.andy.lockscreen" 
  android:versionCode="1" 
  android:versionName="1.0" > 
 
  <uses-sdk 
    android:minSdkVersion="8" 
    android:targetSdkVersion="17" /> 
 
  <application 
    android:allowBackup="true" 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" 
    android:theme="@style/AppTheme" > 
    <activity 
      android:name=".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=".MyAdmin" 
      android:description="@string/sample_device_admin_description" 
      android:label="@string/sample_device_admin" 
      android:permission="android.permission.BIND_DEVICE_ADMIN" > 
      <meta-data 
        android:name="android.app.device_admin" 
        android:resource="@xml/device_admin_sample" /> 
 
      <intent-filter> 
        <action android:name="android.app.action.DEVICE_ADMIN_ENABLED" /> 
      </intent-filter> 
    </receiver> 
  </application> 
 
</manifest> 

<device-admin xmlns:android="http://schemas.android.com/apk/res/android"> 
 <uses-policies> 
  <limit-password /> 
  <watch-login /> 
  <reset-password /> 
  <force-lock /> 
  <wipe-data /> 
  <expire-password /> 
  <encrypted-storage /> 
  <disable-camera /> 
 </uses-policies> 
</device-admin> 

<string name="sample_device_admin_description">用戶管理員的描述信息</string> 
<string name="sample_device_admin">設(shè)置管理權(quán)限</string> 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  xmlns:tools="http://schemas.android.com/tools" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  android:paddingBottom="@dimen/activity_vertical_margin" 
  android:paddingLeft="@dimen/activity_horizontal_margin" 
  android:paddingRight="@dimen/activity_horizontal_margin" 
  android:paddingTop="@dimen/activity_vertical_margin" 
  tools:context="com.andy.lockscreen.MainActivity" > 
 
   <Button 
    android:onClick="openAdmin" 
    android:layout_alignParentTop="true" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="開啟管理員權(quán)限" /> 
   
  <Button 
    android:onClick="lockcreen" 
    android:layout_centerInParent="true" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="一鍵鎖屏" /> 
 
  <Button 
    android:onClick="uninstall" 
    android:layout_alignParentBottom="true" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="卸載鎖屏" /> 
</RelativeLayout> 

package com.andy.lockscreen; 
 
import android.app.Activity; 
import android.app.admin.DevicePolicyManager; 
import android.content.ComponentName; 
import android.content.Intent; 
import android.net.Uri; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Toast; 
 
public class MainActivity extends Activity { 
 
  /** 
   * 設(shè)備策略服務(wù) 
   */ 
  private DevicePolicyManager dpm; 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    dpm = (DevicePolicyManager) getSystemService(DEVICE_POLICY_SERVICE); 
  } 
 
  /** 
   * 鎖屏 
   * 
   * @param view 
   */ 
  public void lockcreen(View view) { 
    ComponentName who = new ComponentName(this, MyAdmin.class); 
    // 判斷是否已經(jīng)開啟管理員權(quán)限 
    if (dpm.isAdminActive(who)) { 
      // 鎖屏 
      dpm.lockNow(); 
      // 設(shè)置屏幕密碼 第一個(gè)是密碼 第二個(gè)是附加參數(shù) 
      dpm.resetPassword("123", 0); 
 
      // 清楚數(shù)據(jù) 
      // WIPE_EXTERNAL_STORAGE 清楚sdcard的數(shù)據(jù) 
      // 0 恢復(fù)出廠設(shè)置 
      //dpm.wipeData(DevicePolicyManager.WIPE_EXTERNAL_STORAGE); 
    } else { 
      // 如果為未開啟 提示 
      Toast.makeText(MainActivity.this, "請(qǐng)先開啟管理員權(quán)限!", Toast.LENGTH_SHORT) 
          .show(); 
    } 
  } 
   
 
  /** 
   * 代碼開啟管理權(quán)限 
   * 
   * @param view 
   */ 
  public void openAdmin(View view) { 
    // 創(chuàng)建一個(gè)Intent 添加設(shè)備管理員 
    Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN); 
    // 激活MyAdmin廣播接收著 
    ComponentName who = new ComponentName(this, MyAdmin.class); 
 
    intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, who); 
    // 說明用戶開啟管理員權(quán)限的好處 
    intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, 
        "開啟可以一鍵鎖屏，防止勿碰"); 
    startActivity(intent); 
     
    Toast.makeText(MainActivity.this, "管理員權(quán)限已開啟!", Toast.LENGTH_SHORT).show(); 
  } 
 
  /** 
   * 卸載當(dāng)前的軟件 設(shè)備管理數(shù)據(jù)特殊應(yīng)用 所以不能普通卸載 
   */ 
 
  public void uninstall(View view) { 
    // 1. 先清除管理員權(quán)限 
    ComponentName who = new ComponentName(this, 
        MyAdmin.class); 
    dpm.removeActiveAdmin(who); 
 
    // 2. 普通應(yīng)用的卸載 
    Intent intent = new Intent(); 
    intent.setAction("android.intent.action.VIEW"); 
    intent.addCategory("android.intent.category.DEFAULT"); 
    intent.setData(Uri.parse("package:"+getPackageName())); 
    startActivity(intent); 
 
  } 
 
}