Is there a way to to create a custom answering machine in android?

Question

I'd like to create an app that allow you to filter incoming call to various answering message with :

• "this number is not available" for black listed phone numbers
• A formal message for strangers
• A informative message about what your doing for friends

I don't know how you can get automatically a call, play a recorded message then wait for the answer and record it. Or maybe there is just a way to interact with the actual answering system so I just have to plugin.

Any clue strongly appreciated. A human sacrifice for any code snippet :-)

Answer 1

Access to the internal telephony is not possible or planned for future releases of Android:

http://groups.google.com/group/android-developers/browse_thread/thread/e8904c82a2c4a333

This would present a security risk as app developers could intercept and hijack sensitive calls (eg. telephone banking)

Answer 2

This is not possible on the tmobile G1 at this time. There is no way for an android SDK application to access the call input or output on this hardware/firmware combination.

http://groups.google.com/group/android-developers/browse_thread/thread/d04c307973345fef/a628e578900b3dce?lnk=gst&q=dave+sparks+play+audio#a628e578900b3dce

and

http://groups.google.com/group/android-developers/browse_thread/thread/185e33a3f420d1ac/e14e1dc84bb6dd24?lnk=gst&q=play+sound+call#e14e1dc84bb6dd24