package?com.example.key;


import?android.app.Activity;
import?android.app.admin.DevicePolicyManager;
import?android.content.ComponentName;
import?android.content.Intent;
import?android.os.Bundle;
import?android.view.Window;


public?class?MainActivity?extends?Activity?{

	DevicePolicyManager?policyManager;
	ComponentName?componentName;
????@Override
????protected?void?onCreate（Bundle?savedInstanceState）?{
????????super.onCreate（savedInstanceState）;
????????this.requestWindowFeature（Window.FEATURE_NO_title）;
????????se