Extracting Sensordata

Hey folks,
first of all I'd like to thank you all for your great work here, it is fascinating how good a community can work together!
I hope I can take some benefit of that, since I have the following issues with my app:

- Since it uses classes of a third party framework which strongly uses threads and reflections of which I don't know much myself since I'm a very basic programmer, I need to know what I have to watch out for.

- In these threads I want to receive sensordata like the gps data or the compass data frequently and pass it to another thread which calculates stuff with those values and

- last but not least I want to send those information to a server in my Wifi-Network which offers webservices via SOAP messages.

Any advice (descriptions, how tos, tutorials, threats etc.) on one if those to topics is highly appreciated!
Thank you folks!