Android : Read Facebook wall messages (public)

Hi please tell me the way to read facebook wall messages(public) in android. I know we can establish http connection to the graph url of facebook and get json string from that.After parsing json we can get the wall messages.

But my problem is, what is th开发者_如何学JAVAe graph url?

please help me

https://graph.facebook.com/ID/feed?access_token=token

Where ID is the id of the page in question and of course token is the users access token