问题
Is there any way to receive and identify DTMF signals when you get a phonecall? I found these two functions (extractNetworkPortion & extractPostDialPortion), but I can't seem to get DTMF signal send by phonecalls.
Also, what is the shortest delay you can have for sending DTMF signals when calling someone?
回答1:
Unfortunately this is not possible in standard Android platform (as of the latest version, 3.1)
回答2:
It is not in SDK but you can make it.
Look at this project :
http://code.google.com/p/dtmf-decoder/source/checkout
来源：https://stackoverflow.com/questions/6028581/getting-dtmf-signals-when-receiving-a-call-on-android