Welcome to Awesome Android Apps. A quick shout out to the producers of some stuff that has been helpful to me in learning to code on the Android platform:
https://developer.android.com/ – official docs, UI, Android SDK, etc.
XDA Forums – useful message boards, apps, games, ROMs, tricks and more.
Professional Android Development – decent, if not great, book by Reto Meier / Wrox
#android-dev on freenode IRC
Thanks for the help, folks.