EventBus is a publish/subscribe event bus optimized for Android.

EventBus…

• simplifies the communication between components
  • decouples event senders and receivers
  • performs well with Activities, Fragments, and background threads
  • avoids complex and error-prone dependencies and life cycle issues
• makes your code simpler
• is fast
• is tiny (~50k jar)
• is proven in practice by apps with 100,000,000+ installs
• has advanced features like delivery threads, subscriber priorities, etc.

EventBus in 3 steps

1. Define events:
   public class MessageEvent { / Additional fields if needed / }
   
   
2. Prepare subscribers
   Register your subscriber (in your onCreate or in a constructor):
   eventBus.register(this);
   
   Declare your subscribing method:
   @Subscribe
public void onEvent(AnyEventType event) {/ Do something /};
   
   
3. Post events:
   eventBus.post(event);

This getting started guide shows these 3 steps in more detail.

Add EventBus to your project

Please ensure that you are using the latest version by checking here

Gradle:

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compile 'org.greenrobot:eventbus:3.0.0'

Maven:

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<dependency>
    <groupId>org.greenrobot</groupId>
    <artifactId>eventbus</artifactId>
    <version>3.0.0</version>
</dependency>

Or download EventBus from Maven Central

Homepage, Documentation, Links

For more details on EventBus please check EventBus' website. Here are some direct links you may find useful:

Features

Documentation

Changelog

FAQ

How does EventBus compare to other solutions, like Otto from Square? Check this comparison.

License

Copyright © 2012-2016 Markus Junginger, greenrobot (http://greenrobot.org)

EventBus binaries and source code can be used according to the Apache License, Version 2.0.

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