android的一键锁屏与一键卸载的代码实现

一.设备管理器操作步骤

1.创建类DeviceAdminReceiver的子类

如：com.itheima62.lockscreen.DeviceAdminSample

2.在清单文件中配置广播接收者

<receiver
android:name="com.itheima62.lockscreen.DeviceAdminSample"
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>

3.配置字符串相关信息

<string name="activity_sample_device_admin">设备管理员</string>
<string name="sample_device_admin">管理员</string>
<string name="sample_device_admin_description">开启设备管理员，不开启扣2000块</string>

4.在res目录下创建xml文件夹，在该文件夹下创建device_admin_sample.xml文件，内容：

<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>

5.在代码中创建设备管理器和组件

dpm = (DevicePolicyManager) getSystemService(DEVICE_POLICY_SERVICE);
ComponentName who = new ComponentName(this, DeviceAdminSample.class);

6.写功能

dpm.lockNow();一键锁屏

二.源代码

创建类DeviceAdminReceiver的子类

package com.example.suoping;
import android.app.admin.DeviceAdminReceiver;
public class DeviceAdminSample extends DeviceAdminReceiver
{

}

MainActivity

package com.example.suoping;

import android.app.Activity;
import android.app.admin.DevicePolicyManager;
import android.content.ComponentName;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;

public class MainActivity extends Activity
{
private DevicePolicyManager dpm;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
dpm = (DevicePolicyManager) getSystemService(DEVICE_POLICY_SERVICE);
lockScreen(null);
}

/**
* @param v
* 一键锁屏
*/
public void lockScreen(View v)
{
//如果没有激活设备管理员，提醒给用户做事
ComponentName who = new ComponentName(this, DeviceAdminSample.class);
if (dpm.isAdminActive(who))
{
dpm.lockNow();//一键锁屏
finish();
}
else
{

Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, who);
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,
"设备管理器，，，，，，，，，，，，，，，，");
startActivityForResult(intent, 1);
}
}

@Override
public boolean onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}

RemoveActivity

package com.example.suoping;

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;

public class RemoveActivity extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
remove(null);

}

/**
* 一键卸载
* @param v
*/
public void remove(View v)
{
// 取消激活设备管理
DevicePolicyManager dpm = (DevicePolicyManager) getSystemService(DEVICE_POLICY_SERVICE);
ComponentName who = new ComponentName(this, DeviceAdminSample.class);dpm.removeActiveAdmin(who);//取消激活管理设备

//卸载
Intent remove = new Intent("android.intent.action.DELETE");
remove.addCategory("android.intent.category.DEFAULT");
remove.setData(Uri.parse("package:" + getPackageName()));
startActivity(remove);//卸载用户apk的界面
}
}

布局文件

<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:background="#00000000">

</RelativeLayout>

RemoveActivity.xml

<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:background="#00000000"
>

</RelativeLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.suoping"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.suoping.MainActivity"
android:label="一键锁屏" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.suoping.RemoveActivity"
android:label="一键卸载" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

<receiver
android:name="com.example.suoping.DeviceAdminSample"
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_sample.xml

<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>

strings.xml

<resources>
<string name="app_name">一键锁屏</string>
<string name="action_settings">Settings</string>
<string name="hello_world">Hello world!</string>
<string name="activity_sample_device_admin">设备管理员</string>
<string name="sample_device_admin">管理员</string>
<string name="sample_device_admin_description">开启设备管理员，不开启扣2000块</string>
</resources>