How can I convert phone internal audio to string in android studio jva?

See more:

Java

Android

SDK

I have been using Speech Recognizer for this purpose but it only convert the external audio not the audio played by phone.


So how can I convert phone internal audio to string so that I can search keyword in it!!
Below is how it used my Speech recognizer to convert audio from external but i want to convert its internal audio!!

What I have tried:

Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault());