如何在不录音的情况下采样Android上的麦克风，以获得实时振幅/电平？

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

public class MicrophoneSampler {
    private static final int SAMPLE_RATE = 44100;
    private static final int CHANNEL_CONFIG = AudioFormat.CHANNEL_IN_MONO;
    private static final int AUDIO_FORMAT = AudioFormat.ENCODING_PCM_16BIT;
    private static final int BUFFER_SIZE = AudioRecord.getMinBufferSize(SAMPLE_RATE, CHANNEL_CONFIG, AUDIO_FORMAT);

    private AudioRecord audioRecord;

    public MicrophoneSampler() {
        audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, SAMPLE_RATE, CHANNEL_CONFIG, AUDIO_FORMAT, BUFFER_SIZE);
    }

    public void startSampling() {
        audioRecord.startRecording();
        short[] buffer = new short[BUFFER_SIZE];
        while (true) {
            int read = audioRecord.read(buffer, 0, BUFFER_SIZE);
            if (read > 0) {
                // 计算振幅/电平
                double amplitude = calculateAmplitude(buffer, read);
                System.out.println("Amplitude: " + amplitude);
            }
        }
    }

    private double calculateAmplitude(short[] buffer, int size) {
        long sum = 0;
        for (int i = 0; i < size; i++) {
            sum += Math.abs(buffer[i]);
        }
        return (double) sum / size;
    }

    public void stopSampling() {
        if (audioRecord != null) {
            audioRecord.stop();
            audioRecord.release();
            audioRecord = null;
        }
    }

    public static void main(String[] args) {
        MicrophoneSampler sampler = new MicrophoneSampler();
        sampler.startSampling();
    }
}