I've been looking around to see if there are any ports of Qt or SDL to Android. This is by way of comparison to the Airplay SDK.
There are a couple of open-source projects that have been working towards this... though neither look pratical to my eyes at the moment.
Qt port to Android:
SDL port to Android:
It is a shame that none of the bigger software development companies haven't done this already - the port of Qt would be especially useful!