OOService.java

package me.aflak.test;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.support.annotation.Nullable;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by Omar on 12/08/17.
 */

public class OOService extends Service {
    private static List<String> events = new ArrayList<>();
    private static List<OnEventListener> eventListeners = new ArrayList<>();
    private static List<String> actions = new ArrayList<>();
    private static List<OnEventListener> actionListeners = new ArrayList<>();

    @Nullable @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    public void emit(String event, Object ...o) {
        int index = events.indexOf(event);
        if(index!=-1){
            eventListeners.get(index).onEvent(o);
        }
    }

    public static void subscribe(String event, OnEventListener listener){
        events.add(event);
        eventListeners.add(listener);
    }

    public static void action(String action, Object ...o){
        int index = actions.indexOf(action);
        if(index!=-1){
            actionListeners.get(index).onEvent(o);
        }
    }

    public void bind(String action, OnEventListener listener){
        actions.add(action);
        actionListeners.add(listener);
    }

    public interface OnEventListener{
        void onEvent(Object ...o);
    }
}