At the Texas Linux Fest, there was a great talk that reviewed non-Java ways of programming on Android:

http://texaslinuxfest.org/sessions/decaffeinated-robot-devel...

http://www.deepbluelambda.org/events/live/decaffeinated-robo...

There are some comparisons of code size for the different languages and environments. That was probably the most informative talk I attended at the Linux Fest.