How to build a Android app with Codeigniter?

I'm wondering if somebody build a Android app with Codeigniter.
How did you do it?

I have been thinking to use the webview option for Android apps and to serve a slightly different view to the app of my site. I think the agent library can't probably determine if the user is using the app so I would pass a URI parameter.

Is this a good idea or bad practice? Are there better solutions?