Back4App - Example of Android App for Push Notifications using GCM (Main Activity)

MainActivity.java

package com.example.back4app.APP_NAME;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }
}