package com.example.mylock;

import android.os.Bundle;

import android.R.anim;

import android.app.Activity;

import android.app.admin.DevicePolicyManager;

import android.content.ComponentName;

import android.content.Context;

import android.content.Intent;

import android.view.Menu;

public class MainActivity extends Activity {

private DevicePolicyManager policyManager;

private ComponentName componentName;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        policyManager=(DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);

        componentName=new ComponentName(this, AdminReceiver.class);

        mylock();

        android.os.Process.killProcess(android.os.Process.myPid());

    }

    private void mylock(){

        boolean active=policyManager.isAdminActive(componentName);

        if(!active){

            activeManage();

            policyManager.lockNow();

        }

        if(active){

            policyManager.lockNow();

        }

    }

    private void activeManage(){

        Intent intent=new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);

        intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, componentName);

        intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "--其他描述--");

        startActivityForResult(intent, 0);

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

}