C#光盘刻录

一.背景介绍

最近公司一个老项目需要添加导出数据到光盘的功能.开始对这功能添加有点抵触的.光盘?都啥年代了.

光盘一种即将淘汰的存储媒介.就像当年的随身听,Mp3,Mp4一样,即将退出历史舞台.领导让加,发牢骚归发牢骚,活还是得干哈.

从网上找了一些资料,都是特别古老的文档了.很多方法用起来并不是特别的方便.

1.CodePlex Archive https://archive.codeplex.com/?p=csimapi2samples 其中的例子功能不全,参数都使用dynamic类型,刚开始不了解那些基础概念时,理解起来比较难.可以参考学习.

2.博客:https://blog.csdn.net/huanghunjiuba/article/details/12967463 中的例子BurnCdDemo.

里面的BurnCdDemo对ImApi2做了封装.其实例子里面的封装做的挺不错的.注释也特别全.

在做测试的时候发现刻录功能在本机运行的非常好.在公司的测试机上却获取不到光盘大小,取到的大小是负数.对着Demo的源代码检查了半天,没找到原因.╮(￣▽￣")╭,脑袋好大的.后来找到原因了,在下面的过程中会描述下.

PS:个人不喜欢啥都做抽象.抽象,意味着要多写代码,查找问题也不方便.抽象,依赖注入,控制反转是个好东西,就是要多写许多代码.

个人觉得,很多技术还是要看实际项目情况而使用,没有必要去为了追求使用而滥用.看起来高大上,实际多写了代码维护也不方便.

So,自己搞个简单点的.因为就那么几个功能:获取光驱设备列表,获取光盘信息,添加媒体文件,刻录,进度通知.

二.工欲善其事必先利其器

 因工作电脑没有光驱,测试非常不方便.那我们就安装一个虚拟光驱.

推荐一个比较好用的虚拟光驱软件PhantomBurner,带注册码.下载地址:https://download.csdn.net/download/zjhaag/10909339

安装过程就不说了.选下安装路径,一路Next.安装完成后提示重启.其实不重启也可以用.

安装完成后界面如下.在About中输入注册码激活.点击Create,选择Dvd+RW创建Virtual Disc Image.在资源管理器中就可以看到我们创建的虚拟光驱了.

 三.开工

1.设备列表获取

(1)首先添加一个RecorderHelper.在RecorderHelper类中添加一个静态方法GetRecorderList用于获取光驱设备列表.

        /// <summary>
        /// 获取光驱设备列表
        /// </summary>
        /// <returns></returns>
        public static List<Recorder> GetRecorderList()
        {
            List<Recorder> recordList = new List<Recorder>();

            // Create a DiscMaster2 object to connect to optical drives.
            MsftDiscMaster2 discMaster = new MsftDiscMaster2();
            for (int i = 0; i < discMaster.Count; i++)
            {
                if (discMaster[i] != null)
                {
                    Recorder recorder = new Recorder(discMaster[i]);
                    recordList.Add(recorder);
                }
            }
            return recordList;
        }

此时,需要Recorder光驱对象主要属性如下

        MsftDiscRecorder2 msRecorder = null;    //Recorder

        /// <summary>
        /// 当前磁盘标签
        /// </summary>
        public string RecorderName { get; private set; }    

        /// <summary>
        /// 是否支持当前刻录机
        /// </summary>
        public bool IsRecorderSupported { get; private set; }

        /// <summary>
        /// 是否支持当前磁盘媒体
        /// </summary>
        public bool IsCurrentMediaSupported { get; private set; }

        /// <summary>
        /// 当前磁盘可用大小
        /// </summary>
        public long FreeDiskSize { get; private set; }

        /// <summary>
        /// 当前磁盘总大小
        /// </summary>
        public long TotalDiskSize { get; private set; }

        /// <summary>
        /// 当前媒体状态
        /// </summary>
        public IMAPI_FORMAT2_DATA_MEDIA_STATE CurMediaState { get; private set; }

        /// <summary>
        /// 当前媒体状态
        /// </summary>
        public string CurMediaStateName { get; private set; }

        /// <summary>
        /// 当前媒体类型
        /// </summary>
        public IMAPI_MEDIA_PHYSICAL_TYPE CurMediaType { get; private set; }

        /// <summary>
        /// 当前媒体类型
        /// </summary>
        public string CurMediaTypeName { get; private set; }

        /// <summary>
        /// 是否可以刻录
        /// </summary>
        public bool CanBurn {get;private set;}

(2)对Recorder各属性进行初始化,赋值.主要方法如下

        /// <summary>
        /// Recorder Ctor
        /// </summary>
        /// <param name="uniqueId">标识Id</param>
        public Recorder(string uniqueId)
        {
            this.uniqueId = uniqueId;
            msRecorder = new MsftDiscRecorder2();
            msRecorder.InitializeDiscRecorder(uniqueId);
            InitRecorder();

            this.BurnMediaList = new List<BurnMedia>();
            this.BurnMediaFileSize = 0;
        }

        /// <summary>
        /// 初始化Recorder
        /// 更新Recorder信息,更新光盘后可重试.
        /// </summary>
        public void InitRecorder()
        {
            try
            {
                if (msRecorder.VolumePathNames != null && msRecorder.VolumePathNames.Length > 0)
                {
                    foreach (object mountPoint in msRecorder.VolumePathNames)
                    {   //挂载点 取其中一个
                        RecorderName = mountPoint.ToString();
                        break;
                    }
                }
                // Define the new disc format and set the recorder
                MsftDiscFormat2Data dataWriter = new MsftDiscFormat2Data();
                dataWriter.Recorder = msRecorder;

                if (!dataWriter.IsRecorderSupported(msRecorder))
                {
                    return;
                }
                if (!dataWriter.IsCurrentMediaSupported(msRecorder))
                {
                    return;
                }
                if (dataWriter.FreeSectorsOnMedia >= 0)
                {   //可用大小
                    FreeDiskSize = dataWriter.FreeSectorsOnMedia * 2048L;
                }

                if (dataWriter.TotalSectorsOnMedia >= 0)
                {   //总大小
                    TotalDiskSize = dataWriter.TotalSectorsOnMedia * 2048L;
                }
                CurMediaState = dataWriter.CurrentMediaStatus;  //媒体状态
                CurMediaStateName = RecorderHelper.GetMediaStateName(CurMediaState);
                CurMediaType = dataWriter.CurrentPhysicalMediaType; //媒介类型
                CurMediaTypeName = RecorderHelper.GetMediaTypeName(CurMediaType);
                CanBurn = RecorderHelper.GetMediaBurnAble(CurMediaState);   //判断是否可刻录
            }
            catch (COMException ex)
            {
                string errMsg = ex.Message.Replace("\r\n", ""); //去掉异常信息里的\r\n
                this.CurMediaStateName = $"COM Exception:{errMsg}";
            }
            catch (Exception ex)
            {
                this.CurMediaStateName = $"{ex.Message}";
            }
        }

(3)测试代码如下

                    #region 查找光驱设备
                    Console.Clear();
                    Console.WriteLine("正在查找光驱设备..");
                    List<Recorder> recorderList = RecorderHelper.GetRecorderList();
                    if (recorderList.Count <= 0)
                    {
                        Console.WriteLine("没有可以使用的光驱,请检查.");
                        Console.WriteLine("请连接光驱后,按任意键重试...");
                        Console.ReadKey();
                        continue;
                    }
                    for (int i = 0; i < recorderList.Count; i++)
                    {
                        Recorder tempRecorder = recorderList[i];
                        Console.WriteLine($"发现光驱设备:[{i+1}]  {tempRecorder.RecorderName}");
                        Console.WriteLine($"媒体类型:{tempRecorder.CurMediaTypeName}");
                        Console.WriteLine($"媒体状态:{tempRecorder.CurMediaStateName}");
                        Console.WriteLine("支持刻录:" + (tempRecorder.CanBurn ? "√" : "×"));
                        Console.WriteLine($"可用大小:{FormatFileSize(tempRecorder.FreeDiskSize)}");
                        Console.WriteLine($"总大小:{FormatFileSize(tempRecorder.TotalDiskSize)}");
                    }
                    if (!recorderList.Any(r=>r.CanBurn))
                    {
                        Console.WriteLine("没有可以用于刻录的光驱设备,请检查后,按任意键重试.");
                        Console.ReadKey();
                        continue;
                    }
                    #endregion        

 测试结果:

 

至此,我们完成了对于光驱设备列表的获取及Recorder对象各属性的初始化工作.

说明下,对光驱设备操作需要有管理员权限,没有管理员权限会导致获取失败.对于C#应用程序设置以管理员身份启动请参照https://www.cnblogs.com/babycool/p/3569183.html

2.添加刻录文件

(1)我们为Recorder对象添加待刻录媒体对象列表和待刻录媒体文件大小两个属性

        /// <summary>
        /// 待刻录媒体对象List
        /// </summary>
        public List<BurnMedia> BurnMediaList {get;set;}

        /// <summary>
        /// 待刻录媒体文件大小
        /// </summary>
        public long BurnMediaFileSize { get; set; }

待刻录媒体对象定义如下

    /// <summary>
    /// 刻录媒体
    /// </summary>
    public class BurnMedia
    {
        /// <summary>
        /// 路径
        /// </summary>
        public string MediaPath { get; set; }

        /// <summary>
        /// 名称
        /// </summary>
        public string MediaName { get; set; }

        /// <summary>
        /// 是否是文件夹
        /// </summary>
        public bool IsDirectory { get; set; }

        /// <summary>
        /// 大小
        /// </summary>
        public long Size { get; set; }
    }

(2)为Recorder对象添加AddBurnMedia方法

        /// <summary>
        /// 添加刻录媒体对象
        /// </summary>
        public BurnMedia AddBurnMedia(string path)
        {
            BurnMedia media = null;
            if(string.IsNullOrEmpty(path))
            {
                throw new Exception("文件路径不能为空.");
            }
            if(!CanBurn)
            {
                throw new Exception("当前磁盘状态不支持刻录.");
            }
            media = new BurnMedia();
            long fileSize = 0;
            if (Directory.Exists(path))
            {
                DirectoryInfo dirInfo = new DirectoryInfo(path);
                fileSize = GetDirectorySize(path);
                media.MediaName = dirInfo.Name;
                media.MediaPath = dirInfo.FullName;
                media.Size = fileSize;
                media.IsDirectory = true;
            }
            else if (File.Exists(path))
            {
                FileInfo fileInfo = new FileInfo(path);
                fileSize = fileInfo.Length;
                media.MediaName = fileInfo.Name;
                media.MediaPath = fileInfo.FullName;
                media.Size = fileSize;
                media.IsDirectory = false;
            }
            else
            {
                throw new Exception("文件不存在");
            }
            if (BurnMediaFileSize + fileSize >= FreeDiskSize)
            {
                throw new Exception("剩余空间不足");
            }
            if (BurnMediaList.Any(m => m.MediaName.ToLower() == media.MediaName.ToLower()))
            {
                throw new Exception($"已存在媒体名称为{media.MediaName}的对象");
            }
            BurnMediaList.Add(media);
            BurnMediaFileSize += fileSize;
            return media;
        }

(3)测试代码如下

                    while (true)
                    {
                        Console.WriteLine("添加文件:请输入待刻录文件或文件夹路径. 0完成 1查看已添加文件");
                        string filePath = Console.ReadLine();
                        if (string.IsNullOrEmpty(filePath))
                        {
                            continue;
                        }
                        else if (filePath == "0")
                        {
                            break;
                        }
                        else if (filePath == "1")
                        {
                            ShowBurnMediaListInfo(recorder);
                        }
                        else
                        {
                            try
                            {
                                BurnMedia media = recorder.AddBurnMedia(filePath);
                                Console.WriteLine($"添加成功:{filePath}");
                                Console.WriteLine("文件大小:" + FormatFileSize(media.Size));
                                Console.WriteLine("已添加文件总大小:" + FormatFileSize(recorder.BurnMediaFileSize));
                            }
                            catch (Exception ex)
                            {
                                Console.WriteLine($"添加失败:{ex.Message}");
                            }
                        }
                    }

运行结果:

3.刻录及刻录进度通知

 为Recorder对象添加Burn方法.同时,添加刻录进度通知.

(1)添加BurnProgressChanged委托用于通知刻录进度

    /// <summary>
    /// 刻录进度delegate
    /// </summary>
    public delegate void BurnProgressChanged(BurnProgress burnProgress);

刻录进度通知对象定义如下(其属性为根据需求添加):

    /// <summary>
    /// 刻录进度对象
    /// </summary>
    public class BurnProgress
    {
        /// <summary>
        /// 当前操作
        /// 对应IMAPI2.IMAPI_FORMAT2_DATA_WRITE_ACTION枚举
        /// 4 正在写入数据 5完成数据写入 6 刻录完成
        /// </summary>
        public int CurrentAction { get; set; }

        /// <summary>
        /// 当前操作Name
        /// </summary>
        public string CurrentActionName { get; set; }

        /// <summary>
        /// 已用时间单位S
        /// </summary>
        public int ElapsedTime { get; set; }

        /// <summary>
        /// 预计总时间单位S
        /// </summary>
        public int TotalTime { get; set; }

        /// <summary>
        /// 数据写入进度
        /// </summary>
        public decimal Percent { get; set; }

        /// <summary>
        /// 数据写入进度%
        /// </summary>
        public string PercentStr { get { return Percent.ToString("0.00%"); } }
    }

(2)为Recorder对象添加委托属性

        /// <summary>
        /// 刻录进度变化通知
        /// </summary>
        public BurnProgressChanged OnBurnProgressChanged { get; set; }

(3)为Recorder添加Burn方法

        /// <summary>
        /// 刻录
        /// </summary>
        public void Burn(string diskName = "SinoUnion")
        {
            if(!CanBurn)
            {
                throw new Exception("当前磁盘状态不支持刻录");
            }
            if (string.IsNullOrEmpty(diskName))
            {
                throw new Exception("DiskName不能为空");
            }
            if (BurnMediaList.Count <= 0)
            {
                throw new Exception("待刻录文件列表不能为空");
            }
            if(BurnMediaFileSize<=0)
            {
                throw new Exception("待刻录文件大小为0");
            }

            try
            {   //说明
                //1.fsi.ChooseImageDefaults用的是IMAPI2FS的,我们定义的msRecorder是IMAPI2的.所以必须用动态类型
                //2.dataWriter也要使用动态类型,要不然Update事件会出异常.
                // Create an image stream for a specified directory.
                dynamic fsi = new IMAPI2FS.MsftFileSystemImage();  // Disc file system
                IMAPI2FS.IFsiDirectoryItem dir = fsi.Root;                 // Root directory of the disc file system                
                dynamic dataWriter = new MsftDiscFormat2Data(); //Create the new disc format and set the recorder

                dataWriter.Recorder = msRecorder;
                dataWriter.ClientName = "SinoGram";
                //不知道这方法不用行不行.用的参数是IMAPI2FS的.
                //所以学官网的例子,把fsi改成了动态的.使用msRecorder作为参数
                fsi.ChooseImageDefaults(msRecorder);

                //设置相关信息
                fsi.VolumeName = diskName;   //刻录磁盘名称
                for (int i = 0; i < BurnMediaList.Count; i++)
                {
                    dir.AddTree(BurnMediaList[i].MediaPath, true);
                }
                // Create an image from the file system
                IStream stream = fsi.CreateResultImage().ImageStream;
                try
                {
                    dataWriter.Update += new DDiscFormat2DataEvents_UpdateEventHandler(BurnProgressChanged);
                    dataWriter.Write(stream);// Write stream to disc
                }
                catch (System.Exception ex)
                {
                    throw ex;
                }
                finally
                {
                    if (stream != null)
                    {
                        Marshal.FinalReleaseComObject(stream);
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"刻录失败:{ex.Message}");
            }
        }

        /// <summary>
        /// 刻录进度通知
        /// </summary>
        /// <param name="object"></param>
        /// <param name="progress"></param>
        void BurnProgressChanged(dynamic @object, dynamic progress)
        {
            BurnProgress burnProgress = new BurnProgress();
            try
            {
                burnProgress.ElapsedTime = progress.ElapsedTime;
                burnProgress.TotalTime = progress.TotalTime;
                burnProgress.CurrentAction = progress.CurrentAction;
                if (burnProgress.ElapsedTime > burnProgress.TotalTime)
                {   //如果已用时间已超过预估总时间.则将预估总时间设置为已用时间
                    burnProgress.TotalTime = burnProgress.ElapsedTime;
                }
                string strTimeStatus;
                strTimeStatus = "Time: " + progress.ElapsedTime + " / " + progress.TotalTime;
                int currentAction = progress.CurrentAction;
                switch (currentAction)
                {
                    case (int)IMAPI2.IMAPI_FORMAT2_DATA_WRITE_ACTION.IMAPI_FORMAT2_DATA_WRITE_ACTION_CALIBRATING_POWER:
                        burnProgress.CurrentActionName = "Calibrating Power (OPC)";
                        break;
                    case (int)IMAPI2.IMAPI_FORMAT2_DATA_WRITE_ACTION.IMAPI_FORMAT2_DATA_WRITE_ACTION_COMPLETED:
                        burnProgress.CurrentActionName = "Completed the burn";
                        burnProgress.Percent = 1;
                        burnProgress.TotalTime = burnProgress.ElapsedTime;  //刻录完成,将预估用时,修正为已用时间
                        break;
                    case (int)IMAPI2.IMAPI_FORMAT2_DATA_WRITE_ACTION.IMAPI_FORMAT2_DATA_WRITE_ACTION_FINALIZATION:
                        burnProgress.CurrentActionName = "Finishing the writing";
                        burnProgress.Percent = 1;
                        burnProgress.TotalTime = burnProgress.ElapsedTime;  //写入完成,将预估用时,修正为已用时间
                        break;
                    case (int)IMAPI2.IMAPI_FORMAT2_DATA_WRITE_ACTION.IMAPI_FORMAT2_DATA_WRITE_ACTION_FORMATTING_MEDIA:
                        burnProgress.CurrentActionName = "Formatting media";
                        break;
                    case (int)IMAPI2.IMAPI_FORMAT2_DATA_WRITE_ACTION.IMAPI_FORMAT2_DATA_WRITE_ACTION_INITIALIZING_HARDWARE:
                        burnProgress.CurrentActionName = "Initializing Hardware";
                        break;
                    case (int)IMAPI2.IMAPI_FORMAT2_DATA_WRITE_ACTION.IMAPI_FORMAT2_DATA_WRITE_ACTION_VALIDATING_MEDIA:
                        burnProgress.CurrentActionName = "Validating media";
                        break;
                    case (int)IMAPI2.IMAPI_FORMAT2_DATA_WRITE_ACTION.IMAPI_FORMAT2_DATA_WRITE_ACTION_VERIFYING:
                        burnProgress.CurrentActionName = "Verifying the data";
                        break;
                    case (int)IMAPI2.IMAPI_FORMAT2_DATA_WRITE_ACTION.IMAPI_FORMAT2_DATA_WRITE_ACTION_WRITING_DATA:
                        dynamic totalSectors;
                        dynamic writtenSectors;
                        dynamic startLba;
                        dynamic lastWrittenLba;
                        totalSectors = progress.SectorCount;
                        startLba = progress.StartLba;
                        lastWrittenLba = progress.LastWrittenLba;
                        writtenSectors = lastWrittenLba - startLba;                        
                        burnProgress.CurrentActionName = "Writing data";
                        burnProgress.Percent = Convert.ToDecimal(writtenSectors)/ Convert.ToDecimal(totalSectors);
                        break;
                    default:
                        burnProgress.CurrentActionName = "Unknown action";
                        break;
                }
            }
            catch (Exception ex)
            {
                burnProgress.CurrentActionName = ex.Message;
            }
            if (OnBurnProgressChanged != null)
            {
                OnBurnProgressChanged(burnProgress);
            }
        }

(4)测试代码如下

                    if (recorder.BurnMediaList.Count <= 0)
                    {
                        Console.WriteLine($"未添加任何刻录文件.已退出刻录过程.");
                    }
                    else
                    {
                        #region 刻录前确认
                        bool confirmBurn = false;
                        Console.Clear();
                        ShowBurnMediaListInfo(recorder);
                        while (true)
                        {
                            Console.WriteLine();
                            Console.ForegroundColor = ConsoleColor.DarkGreen;//设置颜色.
                            Console.WriteLine($"刻录过程一旦开始,终止可能会造成磁盘损坏.确认要开始刻录(y/n)?");
                            Console.ForegroundColor = colorFore;//还原颜色.
                            string confirmStr = Console.ReadLine();
                            if (confirmStr.ToLower() == "n")
                            {
                                break;
                            }
                            else if (confirmStr.ToLower() == "y")
                            {
                                confirmBurn = true;
                                break;
                            }
                        }
                        if (!confirmBurn)
                        {
                            Console.WriteLine($"本次刻录过程已退出");
                            continue;
                        }
                        #endregion
                        Console.CursorVisible = false;    //隐藏光标
                        ShowBurnProgressChanged(recorder);
                        recorder.Burn();    //刻录
                        Console.WriteLine();
                    }

(5)输出刻录进度变化,添加ShowBurnProgressChanged方法

在查找如何输出进度数据的时候,看到了控制台输出进度条的功能.带颜色的还挺漂亮的,看到好的功能就想加到我们的项目里.

        /// <summary>
        /// 输出刻录进度通知
        /// </summary>
        /// <param name="recorder"></param>
        static void ShowBurnProgressChanged(Recorder recorder)
        {
            Console.Clear();

            #region 搭建输出显示框架
            Console.WriteLine();
            Console.WriteLine($"**********************刻录中,请稍候**********************");
            Console.WriteLine();
            Console.WriteLine("  当前操作:"); //第4行当前操作
            Console.WriteLine();

            // 第6行绘制进度条背景
            Console.Write("  ");
            Console.BackgroundColor = ConsoleColor.DarkCyan;
            for (int i = 1; i <= 50; i++)
            {   //设置50*1的为总进度
                Console.Write(" ");
            }

            Console.WriteLine();
            Console.BackgroundColor = colorBack;

            Console.WriteLine();    //第7行输出空行
            Console.WriteLine();    //第8行输出进度
            Console.WriteLine($"*********************************************************");  //第9行
            Console.WriteLine();    //第10行输出空行
            #endregion

            //进度变化通知时,更新相关行数据即可.
            recorder.OnBurnProgressChanged += (burnProgress) => {
                if (burnProgress.CurrentAction == 6)
                {   //刻录完成
                    Console.SetCursorPosition(0, 1);
                    Console.WriteLine($"*************************刻录完成************************");
                }
                //第4行 当前操作
                Console.SetCursorPosition(0, 3);
                Console.Write($"  当前操作:{burnProgress.CurrentActionName}");
                Console.Write("                  ");    //填充空白区域
                Console.ForegroundColor = colorFore;

                // 第6行 绘制进度条进度(进度条前预留2空格)
                Console.BackgroundColor = ConsoleColor.Yellow; // 设置进度条颜色
                Console.SetCursorPosition(2, 5); // 设置光标位置,参数为第几列和第几行
                for (int i = 0; i <burnProgress.Percent*50; i++)
                {   //每个整数写入1个空格
                    Console.Write(" "); // 移动进度条
                }
                Console.BackgroundColor = colorBack; // 恢复输出颜色
                
                //第8行 已用时间,总时间
                Console.ForegroundColor = ConsoleColor.Green;// 更新进度百分比,原理同上.
                Console.SetCursorPosition(0, 7);
                Console.Write($"  进度:{burnProgress.PercentStr}  " +
                    $"已用时间:{FormatTime(0, 0, burnProgress.ElapsedTime)}  " +
                    $"剩余时间:{FormatTime(0, 0, burnProgress.TotalTime - burnProgress.ElapsedTime)}");
                Console.Write("      ");    //填充空白区域
                Console.ForegroundColor = colorFore;

                Console.SetCursorPosition(0, 9);    //光标 定位到第10行
            };
        }

运行结果如下,剩余时间为IMAPI2提供.并不一定准确.

四.BurnCdDemo获取磁盘大小为负数bug

在开始的时候,我们说了使用BurnCdDemo获取光盘大小为负数.在实际开发的过程中,也碰到了.因为我们买的光盘太大了?达到8G,实际模拟刻录时,没那么大.所以没啥问题.

我们看BurnCdDemo里Recorder对象的代码:

private long m_nDiskSize = 0;
private long m_nUseableSize = 0;

//可用的
m_nUseableSize = msFormat.FreeSectorsOnMedia * 2048;
//总大小
m_nDiskSize = msFormat.TotalSectorsOnMedia * 2048;

msFormat.FreeSectorsOnMedia和msFormat.TotalSectorsOnMedia类型为int.大家想到原因了吧.int溢出了.所以把后面的2048改为2048L就可以了.看似正常的代码,以后在碰到类型转换时要多注意些.

五.总结

总结写点啥呢.当然是最重要的哈.上源码:https://github.com/279328316/RecorderHelper

如有问题,欢迎留言.