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PR 没有实现粘性事件

之前说的使用方法,都是需要先注册(register),再post,才能接受到事件;如果你使用postSticky发送事件,那么可以不需要先注册,也能接受到事件,也就是一个延迟注册的过程。
   普通的事件我们通过post发送给EventBus,发送过后之后当前已经订阅过的方法可以收到。但是如果有些事件需要所有订阅了该事件的方法都能执行呢?例如一个Activity,要求它管理的所有Fragment都能执行某一个事件,但是当前我只初始化了3个Fragment,如果这时候通过post发送了事件,那么当前的3个Fragment当然能收到。但是这个时候又初始化了2个Fragment,那么我必须重新发送事件,这两个Fragment才能执行到订阅方法。
   粘性事件就是为了解决这个问题,通过 postSticky 发送粘性事件,这个事件不会只被消费一次就消失,而是一直存在系统中,知道被 removeStickyEvent 删除掉。那么只要订阅了该粘性事件的所有方法,只要被register 的时候,就会被检测到,并且执行。订阅的方法需要添加 sticky = true 属性。

作者:Mr丶sorrow
链接:https://www.jianshu.com/p/428a5257839c
來源:简书
简书著作权归作者所有,任何形式的转载都请联系作者获得授权并注明出处。

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