Android SignKey

http://mrslowblog.blogspot.tw/2013/01/sign-apk-android-app.html
http://stackoverflow.com/questions/3635101/how-to-sign-android-app-with-system-signature
http://sam-chiu.blogspot.tw/
http://pontiffkao.blogspot.tw/2010/12/android-android-signed-application.html
http://m.oschina.net/blog/80843
http://www.360doc.com/content/12/0401/10/3700464_199872997.shtml