I'm searching a tool or a method to record an Android App including Audio on a Android phone. On my research I found a similar question and three tools. But no one can't record video and audio together.
There's no portable way of recording the audio that's being played on the phone. Unless you use the internal mic to record the sound coming from the internal loudspeaker, which A) will result in an extremely poor recording, and B) fails completely if the user has attached e.g. a wired headset.