React Native Event

React Native event emitter with callback on both Android & iOS.

Sometimes we send event to javascript and want to execute some native codes with javascript result, we have to write lots of template codes, so this library provide the ability to send event with callback.

iOS Screenshot

Android Screenshot

Build and run the demo

$ cd RNEventDemo/
$ yarn install
$ react-native run-ios # or react-native run-android

Setup

Install:

$ yarn add rn-event-emitter-callback

iOS:

• You must be consuming React itself via CocoaPods for this to work, see React Native documentation on how to set that up.

• Add the following to your Podfile and run pod update

  pod 'ReactEventEmitter', :path => '../node_modules/rn-event-emitter-callback/Source/ios/'

Android：

• Edit android/settings.gradle to look like this (without the +):

  rootProject.name = 'MyApp'
  
  include ':app'
  
  + include ':ReactEventEmitter'
  + project(':ReactEventEmitter').projectDir = new File(rootProject.projectDir, '../node_modules/rn-event-emitter-callback/Source/android')

• Edit android/app/build.gradle to look like this:

  apply plugin: 'com.android.application'
  
  android {
    ...
  }
  
  dependencies {
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}"
    implementation "com.facebook.react:react-native:+"  // From node_modules
    implementation 'org.greenrobot:eventbus:3.1.1'
  + implementation project(':ReactEventEmitter')
  }

• Edit MainApplication.java to look like this:

  package com.myapp;
  
  + import me.tom.react.event.ReactEventEmitterPackage;
  
  ....
  
    @Override
    protected List<ReactPackage> getPackages() {
      return Arrays.<ReactPackage>asList(
        new MainReactPackage()
  +   , new ReactEventEmitterPackage()
      );
    }
  
  }

Demo

• JavaScript
• iOS
• Android

API

JavaScript

ReactEventEmitter.addListener(name, { params, callback });
ReactEventEmitter.removeListener(name);

iOS

- (void)sendEvent:(RCTBridge *)bridge name:(NSString *)name;
- (void)sendEvent:(RCTBridge *)bridge name:(NSString *)name
           params:(id)params;
- (void)sendEvent:(RCTBridge *)bridge name:(NSString *)name
         callback:(ReactEventEmitterCallbackHandler)callback;
- (void)sendEvent:(RCTBridge *)bridge name:(NSString *)name
           params:(id)params
         callback:(ReactEventEmitterCallbackHandler)callback;

Android

public void sendEvent(ReactContext context, String name);
public void sendEvent(ReactContext context, String name, @Nullable Object params);
public void sendEvent(ReactContext context,
                      String name,
                      @Nullable ReactEventEmitterCallbackHandler callbackHandler);
public void sendEvent(ReactContext context,
                      String name,
                      @Nullable Object params,
                      @Nullable ReactEventEmitterCallbackHandler callbackHandler);

Note

The callback is run in main thread.

License

MIT