How to intercept a voice stream on Android?

Question

Java

Hello. Interested in whether it is possible to somehow intercept the traffic of the current call in a third-party application? Those. get for example 2 streams, in one streaming audio from your microphone, in the other streaming audio from your opponent?

Answer 1

at one time when I was writing an application for recording conversations with the line it turned out.
There is an api in android for recording, but it does not work everywhere.
Since in some countries it is forbidden by law to record a conversation without the knowledge of an opponent, etc.
At the moment, applications on google play and w3bsit3-dns.com that record a conversation
mainly require root devices. Then you can cover the maximum devices.

Answer 2

In the standard API, this is definitely not the case.
maybe xposed? but I didn't look at it.

Answer 3

See this:
record voice call in android
Record phone calls on android phone?
How can I record voice and record Call in Android?...