Mic Access on Android Processing

MicAccess

import android.media.AudioRecord;
import android.media.AudioFormat;
import android.media.MediaRecorder;

final int RECORDER_SAMPLERATE = 44100;
final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_MONO;
final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;

short[] buffer = null;
AudioRecord audioRecord = null;
int bufferSize;
float volume = 0;

void setup() {
  bufferSize = AudioRecord.getMinBufferSize(RECORDER_SAMPLERATE,RECORDER_CHANNELS,RECORDER_AUDIO_ENCODING);
  audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, RECORDER_SAMPLERATE, RECORDER_CHANNELS,RECORDER_AUDIO_ENCODING, bufferSize);
  audioRecord.startRecording();
  buffer = new short[bufferSize];
}

void draw() {
   background(200);
   int bufferReadResult = audioRecord.read(buffer, 0, bufferSize);
   volume = 0;
   for (int i = 0; i < bufferReadResult; i++) 
   {
      //volume = Math.max(Math.abs(buffer[i]), volume);
     line( i, 200 + buffer[i]/100, i + 1, 200 + buffer[i+1]/100 ); 
   }
   //text("" + volume, 100, 100);
}

void stop() {
  audioRecord.stop();
  audioRecord.release();
}