Even Bus 3.1.1

定义事件

public static class MessageEvent { /* Additional fields if needed */ }

(声明和注解事件接收方法)Declare and annotate your subscribing method,注意方法的名称和event名称要对应。
MessageEvent-->onMessageEvent()

@Subscribe(threadMode = ThreadMode.MAIN)  
public void onMessageEvent(MessageEvent event) {/* Do something */};

注册和取消注册

@Override
 public void onStart() {     super.onStart();
     EventBus.getDefault().register(this);
 } @Override
 public void onStop() {     super.onStop();
     EventBus.getDefault().unregister(this);
 }

发送事件

EventBus.getDefault().post(new MessageEvent()); EventBus.getDefault().post(new MessageEvent(“要传送的内容”));

粘性事件（Sticky Events）:就是在发送事件之后再订阅该事件也能收到该事件

EventBus.getDefault().postSticky(new MessageEvent("Hello everyone!"));

@Subscribe(sticky = true, threadMode = ThreadMode.MAIN)// sticky =true,可以接收粘性事件。public void onEvent(MessageEvent event) {   
    textField.setText(event.message);
}