Adroid In-App google pay billing system enabling to our Application

http://mcondev.wordpress.com/2011/06/26/integrate-in-app-billing-just-3-lines-of-code-in-your-app/
http://www.mobileoped.com/2012/04/06/android-google-play-in-app-billing-part-1/
http://aur.archlinux.org/packages.php?ID=57457