public string StartRecordingAudio()
{
string fullfilename = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath
+ "/" + Android.OS.Environment.DirectoryDownloads;
fullfilename += "/" + String.Format("myAudio_{0}.mp4", Guid.NewGuid());
try
{
_recorder = new Android.Media.MediaRecorder();
_recorder.SetAudioSource(Android.Media.AudioSource.Mic);
_recorder.SetOutputFormat(Android.Media.OutputFormat.Mpeg4);
_recorder.SetAudioEncoder(Android.Media.AudioEncoder.AmrNb);
_recorder.SetOutputFile(fullfilename);
_recorder.Prepare();
_recorder.Start();
timer.Start();
saveAudio = false;
_recordingFile = fullfilename;
return(fullfilename);
}
catch (Exception)
{
return("");
}
}
public PlatformSystem(Activity activity)
{
m_Activity = activity;
this.m_ConnectivityManager = (ConnectivityManager)Application.Context.GetSystemService(Context.ConnectivityService);
//record audios
timer.Interval = 1000;
timer.Elapsed += Timer_Elapsed;
_recorder = new Android.Media.MediaRecorder();
_player = new Android.Media.MediaPlayer();
_player.Completion += (sender, e) => {
_player.Reset();
};
}
private void initRecorder(int width, int height)
{
mMediaRecorder = new Android.Media.MediaRecorder();
// 遇到的坑 -- 用户权限没有赋予 Mic 会报错 "setAudioSource failed.", 故此处进行判断是否含有麦克风权限
if (Xamarin.Essentials.DeviceInfo.Version.Major >= 6)
{
Android.Content.PM.Permission permission = mAppActivity.CheckSelfPermission(Android.Manifest.Permission.RecordAudio);
if (permission == Android.Content.PM.Permission.Granted)
{
// mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mMediaRecorder.SetAudioSource(Android.Media.AudioSource.Mic);
}
}
// mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
mMediaRecorder.SetVideoSource(Android.Media.VideoSource.Surface);
// mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mMediaRecorder.SetOutputFormat(Android.Media.OutputFormat.ThreeGpp);
// mediaRecorder.setOutputFile(getsaveDirectory() + System.currentTimeMillis() + ".mp4");
// 遇到的坑 -- 目录没有创建会报出 Java.IO.FileNotFoundException, 要先判断 Dir 是否存在, 不存在则进行创建
var mp4FileInfo = MyAndroidScreenRecord.GetScreenVideoFileInfo(mImageFileDateTime, mDirName);
if (mp4FileInfo.Directory.Exists == false)
{
mp4FileInfo.Directory.Create();
}
mMediaRecorder.SetOutputFile(mp4FileInfo.FullName);
// mediaRecorder.setVideoSize(width, height);
mMediaRecorder.SetVideoSize(width, height);
// mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
mMediaRecorder.SetVideoEncoder(Android.Media.VideoEncoder.H264);
// 遇到的坑 -- 用户权限没有赋予 Mic 会报错 "setAudioSource failed.", 故此处进行判断是否含有麦克风权限
if (Xamarin.Essentials.DeviceInfo.Version.Major >= 6)
{
Android.Content.PM.Permission permission = mAppActivity.CheckSelfPermission(Android.Manifest.Permission.RecordAudio);
if (permission == Android.Content.PM.Permission.Granted)
{
// mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mMediaRecorder.SetAudioEncoder(Android.Media.AudioEncoder.AmrNb);
}
}
// mediaRecorder.setVideoEncodingBitRate(5 * 1024 * 1024);
mMediaRecorder.SetVideoEncodingBitRate(5 * 1024 * 1024);
// mediaRecorder.setVideoFrameRate(30);
mMediaRecorder.SetVideoFrameRate(mDpi);
try
{
mMediaRecorder.Prepare();
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("MyAndroidScreenRecord - initRecorder 捕获到错误");
System.Diagnostics.Debug.WriteLine(ex.GetFullInfo());
System.Diagnostics.Debugger.Break();
throw ex;
}
}
