EventBus3.1.1 解决 Caused by: org.greenrobot.eventbus.EventBusException: Subscriber class ... and its super classes have no public methods with the @Sub

      小菜今天自己写测试 Demo 时，需要用到 EventBus，目前集成 3.1.1 版本，集成的方式很简单，在某个 Fragment 实践应用中，却一直报入下错：
Caused by: org.greenrobot.eventbus.EventBusException: Subscriber class com.roating.ace.frag.FragmentSign and its super classes have no public methods with the @Subscribe annotation

      出问题就解决嘛，尝试如下：

1. 检查 EventBus 集成是否添加混淆文件：

-keepattributes *Annotation*
-keepclassmembers class ** {
    @org.greenrobot.eventbus.Subscribe <methods>;
}
-keep enum org.greenrobot.eventbus.ThreadMode { *; }

# Only required if you use AsyncExecutor
-keepclassmembers class * extends org.greenrobot.eventbus.util.ThrowableFailureEvent {
    <init>(java.lang.Throwable);
}

1. 检查 Fragment 中 EventBus 的注册是否正确：

@Override
protected View initViews(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    EventBus.getDefault().register(this);
    View view = inflater.inflate(R.layout.activity_sign, null);
    return view;
}
@Override
public void onDestroyView() {
    super.onDestroyView();
    EventBus.getDefault().unregister(this);
}

1. 检查接受 Event 的方法是否添加 @Subscribe：

@Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
void refreshSignTime(EventMessageK.SignStateME event) {
    if (event != null) {
        if (event.getType() == 1) {
            mUpTv.setText(event.getTime());
        } else {
            mDownTv.setText(event.getTime());
        }
    }
}

      乍一看应该没啥问题，但是每次都会报 its super classes have no public methods with the @Subscribe annotation，很尴尬，之后各种查网上大神解释，依然没注意问题所在，查看以前写的代码，突然醒悟，因为最近在学 Kotlin，方法定义的时候可以直接定义方法，经常省略方法权限 public/private/protected 等，意识到接收 Event 消息必须是 public 才可以，一个很简单等知识点却因为基础不扎实而浪费了很多时间，希望大家不会遇到小菜的问题。

@Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
fun checkLoginInfo(event: MessageEvent.LoginInfoME) {
    loginPhone = event.phone
}

@Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
public void checkLoginInfo(MessageEvent.LoginInfoME event) {
    loginPhone = event.phone
}

  下面是小菜的公众号，欢迎闲来吐槽～