EventBus: Event bus for Android and Java

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality. - greenrobot/EventBus: Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality. EventBus in 3 steps Define events: public static class MessageEvent { /* Additional fields if needed */ } Prepare subscribers: Declare and annotate your subscribing method, optionally specify a thread mode: @Subscribe(threadMode = ThreadMode.MAIN) public void onMessageEvent(MessageEvent event) { // Do something } Register and unregister your subscriber. For example on Android, activities and fragments should usually register according to their life cycle: @Override public void onStart() { super.onStart(); EventBus.getDefault().register(this); } @Override public void onStop() { super.onStop(); EventBus.getDefault().unregister(this); } Post events: EventBus.getDefault().post(new MessageEvent()); examples: https://github.com/greenrobot-team/greenrobot-examples