Android 使用AudioRecorder 录音并播放PCM 音频

最新推荐文章于 2024-05-21 10:10:35 发布

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最新推荐文章于 2024-05-21 10:10:35 发布 · 1.3k 阅读

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本文详细介绍了如何在Android平台上使用AudioRecord进行PCM格式的录音，并通过AudioTrack实现播放。同时，文章还展示了如何启用蓝牙耳机进行音频录制，包括开启和关闭SCO连接的实现。整个过程涵盖了从初始化、录音、播放到错误处理的完整流程。

本文介绍的是录音采用AudioRecorder 然后保存PCM 格式到文件然后使用AudioTrack 播放PCM 同时支持蓝牙耳机录制音频

下面贴下代码

1 AudioRecorder 录制和播放

package com.kwai.video.uikit.bluetoothapplication;

import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioRecord;
import android.media.AudioTrack;
import android.media.MediaRecorder;
import android.text.TextUtils;
import android.util.Log;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class AudioRecordManager {
    public static final String TAG = "AudioRecordManager";
    private AudioRecord mRecorder;
    private DataOutputStream dos;
    private Thread recordThread;
    private boolean isStart = false;
    private static AudioRecordManager mInstance;
    private int bufferSize;

    public AudioRecordManager() {
        //CHANNEL_IN_STEREO 双声道 输入
        //ENCODING_PCM_16BIT 16 bit 字节
        bufferSize = AudioRecord.getMinBufferSize(8000,
                AudioFormat.CHANNEL_IN_STEREO, AudioFormat.ENCODING_PCM_16BIT);
        mRecorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
                8000, AudioFormat.CHANNEL_IN_STEREO,
                AudioFormat.ENCODING_PCM_16BIT, bufferSize * 2);
    }

    /**
     * 获取单例引用
     *
     * @return
     */
    public static AudioRecordManager getInstance() {
        if (mInstance == null) {
            synchronized (AudioRecordManager.class) {
                if (mInstance == null) {
                    mInstance = new AudioRecordManager();
                }
            }
        }
        return mInstance;
    }

    /**
     * 销毁线程方法
     */
    private void destroyThread() {
        try {
            isStart = false;
            if (null != recordThread && Thread.State.RUNNABLE == recordThread.getState()) {
                try {
                    Thread.sleep(500);
                    recordThread.interrupt();
                } catch (Exception e) {
                    recordThread = null;
                }