NavigationReactEventEmitter.java

package com.reactnativenavigation.bridge;

import com.facebook.react.bridge.Arguments;
import com.facebook.react.bridge.ReactContext;
import com.facebook.react.bridge.WritableMap;
import com.facebook.react.modules.core.DeviceEventManagerModule.RCTDeviceEventEmitter;

public class NavigationReactEventEmitter {

    private static final String KEY_EVENT_ID = "id";
    private static final String KEY_EVENT_TYPE = "type";
    private static final String KEY_NAVIGATOR_EVENT_ID = "navigatorEventID";
    private static final String EVENT_TYPE = "NavBarButtonPress";
    private RCTDeviceEventEmitter eventEmitter;

    public NavigationReactEventEmitter(ReactContext reactContext) {
        this.eventEmitter = reactContext.getJSModule(RCTDeviceEventEmitter.class);
    }

    public void sendNavigatorEvent(String eventId, String navigatorEventId) {
        WritableMap data = Arguments.createMap();
        data.putString(KEY_EVENT_TYPE, EVENT_TYPE);
        data.putString(KEY_EVENT_ID, eventId);
        data.putString(KEY_NAVIGATOR_EVENT_ID, navigatorEventId);
        eventEmitter.emit(navigatorEventId, data);
    }

    public void sendNavigatorEvent(String eventId, String navigatorEventId, WritableMap data) {
        data.putString(KEY_NAVIGATOR_EVENT_ID, navigatorEventId);
        data.putString(KEY_EVENT_ID, eventId);
        eventEmitter.emit(navigatorEventId, data);
    }

    public void sendEvent(String eventId, String data) {
        eventEmitter.emit(eventId, data);
    }

    public void sendEvent(String eventId, WritableMap data) {
        eventEmitter.emit(eventId, data);
    }
}