Great source for working a RaspberryPi.
https://www.raspberrypi.org/magpi-issues/
Of special interest for Android developers:
Run Android on RaspberryPi, see
https://www.raspberrypi.org/magpi-issues/MagPi71.pdf
MagPi
Moderators: FourthWorld, heatherlaine, Klaus, kevinmiller, robinmiller