java - How can I record system audio in my app on android studio?

Question

I have to record the system sound because during WhatsApp calls the audio disappears if I record it only from the microphone.

My code (MainActivity) is below. All permissions have already been included.

private void initRecorder() {
    try {
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
        mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

        videoUri = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
                +new StringBuilder("/Registrazione_").append(new SimpleDateFormat("dd-MM-yyyy-hh_mm_ss")
        .format(new Date())).append(".mp4").toString();

        mediaRecorder.setOutputFile(videoUri);
        mediaRecorder.setVideoSize(DISPLAY_WIDTH,DISPLAY_HEIGHT);
        mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        mediaRecorder.setVideoEncodingBitRate(512*1000);
        mediaRecorder.setVideoFrameRate(30);

        int rotation = getWindowManager().getDefaultDisplay().getRotation();
        int orientation = ORIENTATIONS.get(rotation + 90);
        mediaRecorder.setOrientationHint(orientation);
        mediaRecorder.prepare();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

If anyone can help me, I would be really grateful. Thanks!

question from:https://stackoverflow.com/questions/66066591/how-can-i-record-system-audio-in-my-app-on-android-studio

Answer 1

Waitting for answers