Default [Q] What parser to use with phpBB ?

I'm making a Android app and I want it to display the phpBB forum similar to tapatalk.
I am not the forum owner, so I can't install the mod for it and the owner doesn't want to do that anyways.
I am trying to parse the html so that it displays correctly on the screen.
There are several open source parsers and I'm not sure which one to use. Can anyone tell me which is the best parser for this?