NSNotificationCenterのようなことをandroidでもやるために

MyEventObject.java

/**
 * NSNotificationのようなもの
 * 通知で送る情報が詰まったオブジェクト
 */
public class MyEventObject extends EventObject {

	public static final String TAG = "MyEventObject";
	
	public enum EventType {
		Hoge,
		HogeHoge
	}
	
	private EventType mEventType;
	
	public MyEventObject(Object source, EventType eventType) {
		super(source);
		mEventType = eventType;
	}
	
	public EventType getEventType() {
		return mEventType;
	}
	
}

MyObservable.java

/**
 * NSNotficationCenterのようなモノ
 * 通知するものを受け取って、発行する
 */
public class MyObservable extends Observable {
	
	public static final String TAG = "MyObservable";
	
	private static MyObservable mInstace = null;
	
	private MyObservable() {
		super();
	}
	
	public static MyObservable getInstace() {
		if (mInstace == null) {
			mInstace = new MyObservable();
		}
		return mInstace;
	}
	
	/**
	 * 指定されたイベントを通知する
	 * @param eventObject
	 */
	public void notice(EventObject event) {
		setChanged();
		notifyObservers(event);
	}
	
}

ReceiveActivity.java

/**
 * 受け取る方
 */
public class ReceiveActivity extends Activity implements Observer {
	
	@Override
	public void update(Observable observable, Object data) {
		MyEventObject event = (MyEventObject)data;
		switch (event.getEventType()) {
		case EventType.Hoge:
			// Hoge通知を受け取った時の処理
			return;
		case EventType.HogeHoge:
			// HogeHoge通知を受け取った時の処理
			return;
		}
	}
	
}

SendActivity.java

/**
 * 例：送る方
 */
public class SendActivity extends Activity implements OnClickListener {

	@Override
	public void onClick(View v) {
		MyEventObject event = new MyEventObject(this, EventType.Hoge);
		MyObservable.getInstace().notice(event);
	}
	
}