How to check whether microphone is used by any background app

Question

I have been searching for couple of days now and havent been able to find a suitable solution.

I am trying to check if any app in the background is using the microph

Answer 1

After searching more i found the solution and i am adding it here for anyone that needs it to find it easier.

private boolean validateMicAvailability(){
    Boolean available = true;
    AudioRecord recorder =
            new AudioRecord(MediaRecorder.AudioSource.MIC, 44100,
                    AudioFormat.CHANNEL_IN_MONO,
                    AudioFormat.ENCODING_DEFAULT, 44100);
    try{
        if(recorder.getRecordingState() != AudioRecord.RECORDSTATE_STOPPED ){
            available = false;

        }

        recorder.startRecording();
        if(recorder.getRecordingState() != AudioRecord.RECORDSTATE_RECORDING){
            recorder.stop();
            available = false;

        }
        recorder.stop();
    } finally{
        recorder.release();
        recorder = null;
    }

    return available;
}