Android Parcelable 설명을 깔끔하게 해놓은 글 원글https://arsviator.blogspot.kr/2010/10/parcelable%EC%9D%84-%EC%82%AC%EC%9A%A9%ED%95%9C-%EC%98%A4%EB%B8%8C%EC%A0%9D%ED%8A%B8-%EC%A0%84%EB%8B%AC-object.html HashCode 옮긴글http://hashcode.co.kr/questions/882/%EC%95%88%EB%93%9C%EB%A1%9C%EC%9D%B4%EB%93%9C%EC%97%90%EC%84%9C-parcelable%EC%9D%B4-%EB%AD%94%EC%A7%80-%EC%9E%90%EC%84%B8%ED%9E%88-%EC%84%A4%EB%AA%85%ED%95%B4%E..