i don't do android programming yet, but i've been gathering resources.
here are a couple starting points.

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book on android dev:

http://my.safaribooksonline.com/book/programming/android/9781430234463/firstchapter#X2ludGVybmFsX0ZsYXNoUmVhZGVyP3htbGlkPTk3ODE0MzAyMzQ0NjMvMTQ=


site for android sdk etc:

http://developer.android.com/sdk/index.html