Web Mining inside an Android App

I'm wanting to create an app which mines and stores data from a movie ticket website. The user will give the movie and the theater name as the INPUT and the app will search for input movie name under the theater given in the mined data which is being refreshed automatically in the background. If found, the app throws a success notification saying that ticket bookings are open for the movie or if not, the app throws a bummer notification. PLEASE HELP! How to go about this?