The vatsim-data-api gives you access to the live data of the Flightsimulation Network http://www.vatsim.net/. The api is written in Java and can be used in common and Android applications.
In general it parses the available online data like server-, pilot- and controller states and generates entity lists in form of POJOs.
If you are interessted, feel free to download and improve the code. You are welcome ;)
To get in detail visit the corresponding wiki page at: https://github.com/Zilchinger/vatsim-data-api/wiki
Best regards,
Zilchinger