Android: receive dialer number press from the other party

I'm wondering if it's possible to receive a notification if user presses a number in dialer on the other side of connection during the phone call. Like the scheme used by various automated support services - "Press 1 to..., press 2 to...". So I would like to receive that number pressed.

Th开发者_Python百科anks

AFAIK it is not possible to tap into the phone's incoming audio stream...

There's a lot of "record incoming call" issues on that matter.

You would need the incoming audio stream to read the DTMF-codes being sent.