Android -- Eventbus

/*

public class EventBus {

HashMap<String, List<Event>>

public void register(String eventName, Event event) {};

public void unregister(String eventName, Event event){};

public void postEvent(String eventName, Object Data){};

public interface Event {

  void onEvent(Object data);

}

}

*/

class EventBus {

  private Map<String, List<Event>> map;

  

  public EventListener() {

    map = new HashMap<String, List<Event>>();

  }

  

  public void register(String eventName, Event event) {

    if (map.containsKey(eventName)) {

      map.get(eventName).add(event);

    } else {

      List<Event> events = new ArrayList<Event>();

      events.add(event);

      map.put(eventName, events);

    }

  };

  

  public void unregister(String eventName, Event event) {

    if (map.containsKey(eventName)) {

      map.get(eventName).remove(event);

    }

  };

  public void postEvent(String eventName, Object data) {

if(map.containsKey(eventName)){

List<Event> events = map.get(eventName);

for(Event event : events){

event.doEvent(data);

}

}

 

/*

    Event event = new Event();

    event.doEvent(data);

    this.register(eventName, event);

    */

  };

} 

class Event {

  private Object data;

  

  public void doEvent(Object data) {

    this.data = data;

  };

}