事件总线在应用程序类中注册和取消注册

Question

Should i register and unregister the event bus in application class? If yes then where should i register and unregister it?

Once Register of event bus is done in application class then should i need to register the event bus in suscriber class?

Is there any problem occurs if i put some methods in Application class as a suscriber methods?

Answer 1

No one, except you, can tell whether you should or shouldn't register Application as a listener on EventBus - it depends on your app's use cases.

If the event is relevant to a specific Activity / Fragment / Service - register them as listeners.

If the event is relevant in the "global" sense (ie centralized error handling based on events) - you might register Application as listener.

You don't need to unregister Application from EventBus in order to prevent memory leaks because:

• their lyfe-cycles are identical ( Application can be treated as Singleton object)
• there is no onDestroy() method in Application

Answer 2

您可以创建一个具有onStart（）和onStop（）具体方法和eventbus实例的Common类，现在您可以在不需要时通过触发该类取消注册EventBus实例。

Answer 3

Subscribe in onStart() unsubscribe in onStop() or any other Android lifecycle component you wish to.

You should be able to have instance of your Event Bus in subscriber class if it implements / extends it or has any instance of it in your class.