Android 录音(录音时为pcm,然后转为MP3)

最新推荐文章于 2025-09-21 10:38:22 发布

原创

最新推荐文章于 2025-09-21 10:38:22 发布 · 3k 阅读

1 ·

CC 4.0 BY-SA版权

本文介绍了一个Android应用程序中使用的录音功能，该功能可以将原始的PCM格式录音文件转换为MP3格式，包括录音、数据处理和格式转换的具体实现细节。

项目中用的评论回复功能,录制语言时为pcm格式,然后转换为MP3格式:

package zhiji.dajing.com.util;

import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.Environment;
import android.os.Handler;
import android.util.Log;

import com.jiangdg.lametomp3.LameMp3;
import com.jiangdg.lametomp3.Mp3Recorder;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.ShortBuffer;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;


public class AudioRecoderUtils {

    //文件路径
    private String filePath;
    //文件夹路径
    private String FolderPath;

    AudioRecord audioRecord;

    private final String TAG = "AudioRecoderUtils";
    public static final int MAX_LENGTH = 1000 * 1000 * 1000 ;// 最大录音时长

    private OnAudioStatusUpdateListener audioStatusUpdateListener;
    private  String voicePath = Environment.getExternalStorageDirectory()+"/dajing/audio/pcm/";
    private String voiceName = TimeUtils.getCurrentTime() + ".pcm";
    private boolean isRecording = false;

    int nMinBufSize =AudioRecord.getMinBufferSize(16000,
            AudioFormat.CHANNEL_IN_MONO,
            AudioFormat.ENCODING_PCM_16BIT);
    private double volume;
    private ExecutorService mThreadExecutor;
    private Handler handler;
    static AudioRecoderUtils audioRecoderUtils_p ;
    public boolean isTmpConversition;


    /**
     * 文件存储默认sdcard/record
     */
    public AudioRecoderUtils(){
        //默认保存路径为/sdcard/record/下
        this(Environment.getExternalStorageDirectory()+"/dajing/audio/pcm/");
        mThreadExecutor = Executors.newScheduledThreadPool(3);
    }

    public AudioRecoderUtils(String filePath) {

        File path = new File(filePath);
        if(!path.exists())
            path.mkdirs();

        this.FolderPath = filePath;

        handler = new Handler();
    }

    public static AudioRecoderUtils getInstance(){

        if (audioRecoderUtils_p == null){
            audioRecoderUtils_p = new AudioRecoderUtils();
        }

        return audioRecoderUtils_p;
    }

    private long startTime;
    private long endTime;


    public void startRecord(){

        audioRecord = new AudioRecord(MediaRecorder.AudioSource.VOICE_COMMUNICATION, 16000,
                AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, nMinBufSize);


        final File file = new File(voicePath);
        voiceName = TimeUtils.getCurrentTime() + ".pcm";

        final File fileaudio = new File(voicePath + voiceName);

        filePath = voicePath + voiceName;

        if (fileaudio.exists()) {