设备管理器实现锁屏

最新推荐文章于 2021-11-11 11:43:03 发布

原创最新推荐文章于 2021-11-11 11:43:03 发布 · 829 阅读

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文章标签：

#android #devicepolicymanager #lock

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本文详细介绍了如何通过监听Button点击事件，利用Android的DevicePolicyManager服务来注册应用并禁用设备的camera，从而实现设备的锁屏功能。同时，文章涵盖了在实现过程中所需的权限设置及Manifest文件的修改。

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对button进行事件监听：按下就会将该应用注册为设备管理器并禁用设备camera；

View.OnClickListener mOnClickListener = new View.OnClickListener(){
        boolean firstin = true ;
        @Override
        public void onClick(View view){
            if (firstin) {
                //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, "something like title");


                startActivityForResult(intent, 0);
                firstin = false ;
            }
            boolean active = dpm.isAdminActive(componentName);
            if (active) {
                dpm.setCameraDisabled(componentName,true);
                dpm.setStorageEncryption(componentName,false);
            }
        }
    };

监听设备管理器状态类——AdminReceiver.java


public class AdminReceiver extends DeviceAdminReceiver {
    @Override
    public DevicePolicyManager getManager(Context context) {
        Log.i("zy", "调用了getManager()方法");
        return super.getManager(context);
    }
    @Override
    public ComponentName getWho(Context context) {
        Log.i("zy", "调用了getWho()方法");
        return super.getWho(context);
    }


    /**
     * 禁用
     */
    @Override
    public void onDisabled(Context context, Intent intent) {
        FullscreenActivity.lockit();
        Log.i("zy", "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("zy", "调用了onDisableRequested()方法");
        return super.onDisableRequested(context, intent);
    }


    /**
     * 激活
     */
    @Override
    public void onEnabled(Context context, Intent intent) {
        Log.i("zy", "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("zy", "调用了onPasswordChanged()方法");
        super.onPasswordChanged(context, intent);
    }
    @Override
    public void onPasswordFailed(Context context, Intent intent) {
        Log.i("zy", "调用了onPasswordFailed()方法");
        super.onPasswordFailed(context, intent);
    }
    @Override
    public void onPasswordSucceeded(Context context, Intent intent) {
        Log.i("zy", "调用了onPasswordSucceeded()方法");
        super.onPasswordSucceeded(context, intent);
    }
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.i("zy", "调用了onReceive()方法");
        super.onReceive(context, intent);
    }
    @Override
    public IBinder peekService(Context myContext, Intent service) {
        Log.i("zy", "调用了peekService()方法");
        return super.peekService(myContext, service);
    }
  public static void lockit(){
        dpm.resetPassword("123456",DevicePolicyManager.RESET_PASSWORD_REQUIRE_ENTRY);
        dpm.lockNow();
    }
}

加上过程中用到的权限的metadata和修改manifest

<receiver
            android:name=".BoradcastReceiver.AdminReceiver"
            android:description="@string/app_name"
            android:label="TestReceiver"
            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>

配置权限文件lockourscreen.xml

<?xml version="1.0" encoding="UTF-8"?>
<device-admin
  xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-policies>
        <force-lock />
        <wipe-data />
        <reset-password />
        <limit-password />
        <watch-login />
        <disable-camera />
        <encrypted-storage/>
    </uses-policies>
</device-admin>