Integrate oauth2 with native (iOS/Android) mobile application

Question

I need to integrate OAuth2 in a iOS and Android native application. I have been researching on OAuth2 and mobile applications and found this documentation - Google APIs - Us

Answer 1

Not a direct answer to this question but for people who come here like I did and get an out of date reply. It's probably best to start here: Google have published their OAuth Java libs and Scribe is Java ready.