simple Android EventBus code

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

import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;
import org.greenrobot.eventbus.ThreadMode;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EventBus.getDefault().register(this);

        MyEvent event = new MyEvent();
        event.id = 1;
        event.time = System.currentTimeMillis();
        EventBus.getDefault().post(event);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        EventBus.getDefault().unregister(this);
    }

    @Subscribe(threadMode = ThreadMode.MAIN, priority = 8)
    public void onMessageEvent1(MyEvent event) {
        Log.d("MAIN消息1", event.id + "," + event.time);
    }

    @Subscribe(threadMode = ThreadMode.MAIN, priority = 9)
    public void onMessageEvent2(MyEvent event) {
        Log.d("MAIN消息2", event.id + "," + event.time);
    }

    @Subscribe(threadMode = ThreadMode.BACKGROUND, priority = 98)
    public void onMessageEvent3(MyEvent event) {
        Log.d("BACKGROUND消息3", event.id + "," + event.time);
    }

    @Subscribe(threadMode = ThreadMode.BACKGROUND, priority = 99)
    public void onMessageEvent4(MyEvent event) {
        Log.d("BACKGROUND消息4", event.id + "," + event.time);
    }

    private class MyEvent {
        public int id;
        public long time;
    }
}