How to retrieve parts of Wikipedia content into Android App?

I have managed to find the answer. I think I over complicate this things. We can actually retrieve the content perfectly without calling the mediawiki API. Because They already provided the interface for mobile.

I just need to load http://en.m.wikipedia.org/wiki/ and add the topic at the back. Then View it using WebView. Displayed perfectly Nice. :)

References: http://en.wikipedia.org/wiki/Help:Mobile_access#Official_online_version