# EventBus

**Repository Path**: BattleCall/EventBus

## Basic Information

- **Project Name**: EventBus
- **Description**: Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.
- **Primary Language**: Java
- **License**: Apache-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-12-17
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

Hey, do have a minute for a [quick survey](https://docs.google.com/forms/d/e/1FAIpQLSePA8NqA9Jlbvh28xcFVbmIGUzHW3dnsxuxi23-ZDPPfkWMSQ/viewform) on how we are doing with EventBus? 

EventBus
========
EventBus is a publish/subscribe event bus for Android and Java.<br/>
<img src="EventBus-Publish-Subscribe.png" width="500" height="187"/>

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.

 [![Build Status](https://travis-ci.org/greenrobot/EventBus.svg?branch=master)](https://travis-ci.org/greenrobot/EventBus)

EventBus in 3 steps
-------------------
1. Define events:

    ```java  
    public static class MessageEvent { /* Additional fields if needed */ }
    ```

2. Prepare subscribers:
    Declare and annotate your subscribing method, optionally specify a [thread mode](http://greenrobot.org/eventbus/documentation/delivery-threads-threadmode/):  

    ```java
    @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:

   ```java
    @Override
    public void onStart() {
        super.onStart();
        EventBus.getDefault().register(this);
    }
 
    @Override
    public void onStop() {
        super.onStop();
        EventBus.getDefault().unregister(this);
    }
    ```

3. Post events:

   ```java
    EventBus.getDefault().post(new MessageEvent());
    ```

Read the full [getting started guide](http://greenrobot.org/eventbus/documentation/how-to-get-started/).

Add EventBus to your project
----------------------------
<a href="https://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.greenrobot%22%20AND%20a%3A%22eventbus%22"><img src="https://img.shields.io/maven-central/v/org.greenrobot/eventbus.svg"></a>

Via Gradle:
```gradle
compile 'org.greenrobot:eventbus:3.1.1'
```

Via Maven:
```xml
<dependency>
    <groupId>org.greenrobot</groupId>
    <artifactId>eventbus</artifactId>
    <version>3.1.1</version>
</dependency>
```

Or download [the latest JAR](https://search.maven.org/remote_content?g=org.greenrobot&a=eventbus&v=LATEST) from Maven Central.

Homepage, Documentation, Links
------------------------------
For more details please check the [EventBus website](http://greenrobot.org/eventbus). Here are some direct links you may find useful:

[Features](http://greenrobot.org/eventbus/features/)

[Documentation](http://greenrobot.org/eventbus/documentation/)

[ProGuard](http://greenrobot.org/eventbus/documentation/proguard)

[Changelog](http://greenrobot.org/eventbus/changelog/)

[FAQ](http://greenrobot.org/eventbus/documentation/faq/)

How does EventBus compare to other solutions, like Otto from Square? Check this [comparison](COMPARISON.md).

License
-------
Copyright (C) 2012-2017 Markus Junginger, greenrobot (http://greenrobot.org)

EventBus binaries and source code can be used according to the [Apache License, Version 2.0](LICENSE).

More Open Source by greenrobot
==============================
[__ObjectBox__](http://objectbox.io/) ([GitHub](https://github.com/objectbox/objectbox-java)) is a new superfast object-oriented database for mobile.

[__Essentials__](http://greenrobot.org/essentials/) ([GitHub](https://github.com/greenrobot/essentials)) is a set of utility classes and hash functions for Android & Java projects.

[__greenDAO__](http://greenrobot.org/greendao/) ([GitHub](https://github.com/greenrobot/greenDAO)) is an ORM optimized for Android: it maps database tables to Java objects and uses code generation for optimal speed.

[Follow us on Google+](https://plus.google.com/b/114381455741141514652/+GreenrobotDe/posts) or check our [homepage](http://greenrobot.org/) to stay up to date.