Clash Royale CLAN TAG#URR8PPP

I need that when I unlock my cellphone, my app shows up inmediately

I need my cell phone to unlock it in my application automatically. The question is what do I do with a receiver ACTION_USER_PRESENT, but it has not worked for me. Some help?

I am working in android studio. Java

Receiver:

package com.example.juan.educandote;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class Monitor extends BroadcastReceiver

Monitor screen;


@Override
public void onReceive(Context arg0, Intent arg1)

if (arg1.getAction().equals(Intent.ACTION_USER_PRESENT))
Intent IntentInitiateApplication;
IntentInitiateApplication = new Intent(arg0, MainActivity.class);
IntentInitiateApplication.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
arg0.startActivity(IntentInitiateApplication);





manifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.juan.educandote">


<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=".Monitor">
<intent-filter>
<action android:name="android.intent.action.USER_PRESENT" />
</intent-filter>
</receiver>

</application>

</manifest>


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