안드로이드 정리해야할 자료
activity 생명주기
http://lyb1495.tistory.com/51
안드로이드 인텐트
http://blog.naver.com/crowdark7?Redirect=Log&logNo=141463352
getRunningTasks
getRunningAppProcesses
안드로이드 패스워드 예제
http://valley.egloos.com/viewer/?url=http://adamjin.egloos.com/2876006
http://androidprogrammingstuff.blogspot.kr/p/android-pass-information-activity-to.html
Sha1 MD5 implement in android
http://karanbalkar.com/2013/05/tutorial-28-implement-sha1-and-md5-hashing-in-android/
