I'm deaf I can not hear on the phone, i have a simple application that needs to call a number and speech-to-text (as best as possible) whatever the other party is saying.
Simply put, if the other party says "Hello", then "Hello" would be displayed on the screen.
I can make a call using Intent.ACTION_CALL:
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:91234567"));
startActivity(callIntent);
However, how do I continue from there, to convert the received audio signals to text?