Thanks for the swift reply. Yes, you’re right, I had 4.2 running, which resulted in the parsing error. Meanwhile I got the 4.4 running but still I’ve several problems to solve (Either Bluetooth or Wifi are not recognised (depending on the computer I use), so far) But I think I will get there. I got the app running and noticed the rotation… thanks for the tips concerning that too.
I will post another reply once I have things running the way they should. It might help others as well.