http://fimtrus.tistory.com/entry/Android-Notification-%EC%97%90%EC%84%9C-onNewIntent%EA%B0%80-%ED%83%80%EC%A7%80-%EC%95%8A%EB%8A%94-%EB%AC%B8%EC%A0%9C
http://raphaelh.tistory.com/27
onNewIntent 를 사용해보셔요