为什么不加receliver的android:permission=”android.permission.BIND_DEVICE_ADMIN” 不行
package com.popoaichuiniu.jacy.devicepermissionapply;
import android.app.Instrumentation;
import android.app.admin.DevicePolicyManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
/**
* 设备管理员
*/
private DevicePolicyManager mDPM;
/**
* 四大组件名的封装类
*/
private ComponentName mConmp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDPM = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
mConmp = new ComponentName(this, MyReceiver.class);
Button lockScreen= (Button) findViewById(R.id.button);
lockScreen.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
policy(v);
}
});
}
public void policy(View v) {
boolean active = mDPM.isAdminActive(mConmp);
if (active) {
System.out.println("--已经获取管理员权限--");
mDPM.lockNow();
} else {
Intent intent = new Intent(
DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, mConmp);
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,
"只有激活了管理员权限才能锁屏,清理缓存");
startActivityForResult(intent, 0);
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.popoaichuiniu.jacy.devicepermissionapply">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver
android:name=".MyReceiver"
android:description="@string/app_name"
android:label="@string/app_name">
android:permission="android.permission.BIND_DEVICE_ADMIN" >
<meta-data
android:name="android.app.device_admin"
android:resource="@xml/policy" />
<intent-filter>
<action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
</intent-filter>
</receiver>
</application>
</manifest>
package com.popoaichuiniu.jacy.devicepermissionapply;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class MyReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
}
}