Is it possible to create a phone answering machine program on android phones?

Question

I am researching for my next android app project. ( My wife and I created the Mayan Calendar Countdown 2012 App ) I want to create a phone answering machine for android phones that have all the capabilities of a normal home phone answering machine. The recording of a message to answer with seems relatively easy but I am unsure how to play that message back to the incoming caller.

Is this app possible without some hack that will make it unacceptable for android market? I have a lot of c++ experience and have setup the ndk etc.

BTW stackoverflow is great. I am very impressed with the knowledge here.

Answer 1

As far as I am aware there is no way in the standard Java API to programmatically answer an incoming call. This appears to be one of the features that is reserved by the OS.