There are a couple of Java examples for using the SOAP version of FlightXML2 on http://flightaware.com/commercial/fligh ... ation2.rvt
One uses Axis1 and the other uses Axis2. You might be able to use Axis from Android, but I haven't tried.
Some other people recommend using KSOAP2 if you're developing on Android, but I have no direct experience with it: http://ksoap2.sourceforge.net/http://stackoverflow.com/questions/2975 ... th-android
Another approach is to use the new REST/JSON interface for FlightXML2 on Android. If you go this route, you probably won't need to use any other libraries besides org.apache.http.client.HttpClient and org.json.JSONObject