麦克风测试程序

MicropRunnable.java:

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

public class MicropRunnable implements Runnable {
    // 是否录放的标记
    boolean isRecording = false;
    static final int frequency = 44100;

    @SuppressWarnings("deprecation")
    static final int channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_MONO;
    static final int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;

    // 定义录放音缓冲区大小
    int recBufSize, playBufSize;

    // 实例化录音对象
    AudioRecord audioRecord;

    // 实例化播放对象
    AudioTrack audioTrack;

    public MicropRunnable() {
        // 调用getMinBufferSize方法获得录音的最小缓冲空间
        recBufSize = AudioRecord.getMinBufferSize(frequency, channelConfiguration, audioEncoding);

        // 调用getMinBufferSize方法获得放音最小的缓冲区大小
        playBufSize = AudioTrack.getMinBuffer