MyService.java

package github.nisrulz.service;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.widget.Toast;

public class MyService extends Service {
    public MyService() {
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        System.out.println("onCreate");
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        System.out.println("onStartCommand");
        Toast.makeText(MyService.this, "Service Started", Toast.LENGTH_SHORT).show();
        return super.onStartCommand(intent, flags, startId);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        System.out.println("onDestroy");
    }
}