android caller id app source for newbie

I am looking for source of caller id android app I can learn from. Soemthing like this (or more simple) http://ift.tt/1vKdqmS - but I can't build the app because of some problems with maven. Or something like this http://ift.tt/1Dm9CFI - but there is no code anymore.

I tried google for this but I can't find sources I can learn from. I prefer something I can open in eclipse and start learning code or makeing trial and error changes in it and the compile. Thank you.