有没有什么办法可以接收和识别DTMF信号，当你得到一个phonecall？ 我发现这两个函数（ extractNetworkPortion 和放大器; extractPostDialPortion ），但我似乎无法得到DTMF信号的发送由电话中。

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.

此外，什么是你可以有最短的延迟呼叫某人时发送DTMF信号？

Also, what is the shortest delay you can have for sending DTMF signals when calling someone?

推荐答案

不幸的是，这是不可能的标准Android平台（如最新版本，3.1）

Unfortunately this is not possible in standard Android platform (as of the latest version, 3.1)