Android application communication with server and fetching data

Hey folks! So, here is a thing.I started with Android development, and i created simple travel guide for my [login to view URL], i want be able to update some sections of the application that change offten (like current events in my city, calendar, small news). I am looking for the easiest way to do [login to view URL] i am webdeveloper, i was wondering is it possible to do this with Joomla or Wordpress (so that application would fetch data from Joomla or WP database) or something similiar... If you are interested, plz drop me few lines so we could disqus more (use keyword "myapp") I know that these kinds of stuff are done via API's, so plz help folks :)