!636

!quicknew

import android.media.AudioFormat;

import android.media.AudioRecord;

import android.media.MediaRecorder;

main {

  psvm {

    new SoundMeter sm;

    sm.start();

    for (int i = 0; i < 20; i ++) {

    Thread.sleep(500);

    System.out.println(sm.getAmplitude());

    }

    sm.stop();

  }

}

class SoundMeter {

    private AudioRecord ar = null;

    private int minSize;

    public void start() {

        minSize= AudioRecord.getMinBufferSize(8000, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);

        ar = new AudioRecord(MediaRecorder.AudioSource.MIC, 8000,AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT,minSize);

        ar.startRecording();

    }

    public void stop() {

        if (ar != null) {

            ar.stop();

        }

    }

    public double getAmplitude() {

        short[] buffer = new short[minSize];

        ar.read(buffer, 0, minSize);

        int max = 0;

        for (short s : buffer)

        {

            if (Math.abs(s) > max)

            {

                max = Math.abs(s);

            }

        }

        return max;

    }

}