AudioRecord是Android中用于音频录制的类，它的主要作用是捕获来自设备麦克风或其他音频源的音频数据，并将其保存为PCM格式的音频流，以供后续处理或存储。

以下是关于AudioRecord的一些常见用途和基本使用方法：

作用和用途：

音频录制：AudioRecord可以用于录制来自麦克风、耳机麦克风或其他音频输入源的音频。这在开发语音通话、语音识别、音频笔记、音频流媒体等应用中非常有用。

声音分析：通过捕获音频数据，你可以进行声音分析，如检测音频的频谱、音量、音调等特征，用于声音处理和分析应用。

实时音频处理：你可以将录制的音频数据传递给其他音频处理库或自定义算法，以进行实时音频处理，如降噪、回声消除、音频效果等。

音频存储：你可以将录制的音频数据保存为音频文件，例如.wav或.mp3，以便后续播放或分享。

需要权限：

<uses-permission android:name="android.permission.RECORD_AUDIO"/>

工具类：

package com.realtop.translatemodule.utils;import android.annotation.SuppressLint;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.util.Log;import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;import javax.security.auth.login.LoginException;public class AudioRecordUtils {private static final String TAG = "AudioRecordActivity";private static final int SAMPLE_RATE = 16000; // 采样率为16Kprivate 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;private boolean isRecording = false;private Thread recordingThread;private FileOutputStream fileOutputStream;@SuppressLint("MissingPermission")public synchronized void startRecording(String filePath) {if (isRecording) {Log.i(TAG, "startRecording: ing stop enter");return;}isRecording = true;// 初始化 AudioRecord 对象audioRecord = new AudioRecord(MediaRecorder.AudioSource.VOICE_COMMUNICATION,SAMPLE_RATE,CHANNEL_CONFIG,AUDIO_FORMAT,BUFFER_SIZE);audioRecord.startRecording();// 初始化输出文件try {fileOutputStream = new FileOutputStream(filePath, true);} catch (FileNotFoundException e) {Log.i(TAG, "startRecording: error:" + e.getMessage());}recordingThread = new Thread(() -> {byte[] buffer = new byte[BUFFER_SIZE];while (isRecording) {int bytesRead = audioRecord.read(buffer, 0, BUFFER_SIZE);if (bytesRead != AudioRecord.ERROR_INVALID_OPERATION) {try {fileOutputStream.write(buffer, 0, bytesRead);} catch (IOException e) {Log.i(TAG, "startRecording: error:" + e.getMessage());}}}Log.i(TAG, "startRecording: record thread end");});recordingThread.start();Log.i(TAG, "startRecording: start");}public synchronized void stopRecording() {if (!isRecording) {Log.i(TAG, "stopRecording: end ing");return;}isRecording = false;try {recordingThread.join(); // 精华部分audioRecord.stop();fileOutputStream.close();audioRecord.release();Log.i(TAG, "stopRecording: end");} catch (Exception e) {e.printStackTrace();Log.i(TAG, "stopRecording: error:" + e.getMessage());}}}