public async Task <FileData> TakePhoto(CapturePhotoOptions p_options)
{
if (await IsCameraAvailable())
{
return(await TakeMedia(true, p_options ?? new CapturePhotoOptions()));
}
return(null);
}
public async Task <FileData> TakePhoto(CapturePhotoOptions p_options)
{
if (!await IsCameraAvailable())
{
return(null);
}
var options = p_options ?? new CapturePhotoOptions();
var capture = new CameraCaptureUI();
capture.PhotoSettings.Format = CameraCaptureUIPhotoFormat.Jpeg;
capture.PhotoSettings.MaxResolution = (options.VideoQuality == 1) ? CameraCaptureUIMaxPhotoResolution.HighestAvailable : CameraCaptureUIMaxPhotoResolution.SmallVga;
// we can only disable cropping if resolution is set to max
if (capture.PhotoSettings.MaxResolution == CameraCaptureUIMaxPhotoResolution.HighestAvailable)
{
capture.PhotoSettings.AllowCropping = options.AllowCropping;
}
var result = await capture.CaptureFileAsync(CameraCaptureUIMode.Photo);
if (result == null)
{
return(null);
}
// 将文件移动到CachePath
await result.MoveAsync(await StorageFolder.GetFolderFromPathAsync(Kit.CachePath), Kit.NewGuid + ".jpg");
var fd = new FileData(result.Path, result.Name, (await result.GetBasicPropertiesAsync()).Size);
var prop = await result.Properties.GetImagePropertiesAsync();
fd.Desc = $"{prop.Width} x {prop.Height} (jpg)";
// 生成缩略图
if (prop.Width > FileData.ThumbSize || prop.Height > FileData.ThumbSize)
{
fd.ThumbPath = Path.Combine(Kit.CachePath, Kit.NewGuid + "-t.jpg");
using (var fs = File.Create(fd.ThumbPath))
{
// 默认根据DPI调整缩略图大小
var fl = await result.GetThumbnailAsync(ThumbnailMode.SingleItem, FileData.ThumbSize, ThumbnailOptions.ResizeThumbnail);
await fl.AsStreamForRead().CopyToAsync(fs);
}
}
return(fd);
}
Task <FileData> TakeMedia(bool p_isPhoto, CapturePhotoOptions p_options)
{
var ntcs = new TaskCompletionSource <FileData>();
var previousTcs = Interlocked.Exchange(ref _tcs, ntcs);
if (previousTcs != null)
{
previousTcs.TrySetResult(null);
}
try
{
var intent = new Intent(Application.Context, typeof(CameraCaptureActivity));
intent.PutExtra(CameraCaptureActivity.ExtraIsPhoto, p_isPhoto);
intent.PutExtra(CameraCaptureActivity.ExtraFront, p_options.UseFrontCamera);
intent.PutExtra(MediaStore.ExtraVideoQuality, p_options.VideoQuality);
if (p_options is CaptureVideoOptions vo)
{
// 一定要转成int，否正无法按int获取值！
intent.PutExtra(MediaStore.ExtraDurationLimit, (int)vo.DesiredLength.TotalSeconds);
if (vo.DesiredSize > 0)
{
intent.PutExtra(MediaStore.ExtraSizeLimit, vo.DesiredSize);
}
}
intent.SetFlags(ActivityFlags.NewTask);
Application.Context.StartActivity(intent);
EventHandler <FileData> handler = null;
handler = (s, e) =>
{
var tcs = Interlocked.Exchange(ref _tcs, null);
CameraCaptureActivity.Captured -= handler;
tcs?.SetResult(e);
};
CameraCaptureActivity.Captured += handler;
}
catch (Exception ex)
{
Debug.Write(ex);
_tcs.SetException(ex);
}
return(_tcs.Task);
}
async void OnTakePhoto(object sender, RoutedEventArgs e)
{
CapturePhotoOptions op = new CapturePhotoOptions();
if ((bool)_cbFront.IsChecked)
{
op.UseFrontCamera = true;
}
var fd = await Kit.TakePhoto(op);
if (fd != null)
{
_img.Source = new BitmapImage(new Uri(fd.FilePath));
}
else
{
_img.Source = null;
}
}
Task <FileData> TakeMedia(bool p_isPhoto, CapturePhotoOptions p_options)
{
StatusBarStyle = UIApplication.SharedApplication.StatusBarStyle;
var viewController = GetHostViewController();
var ndelegate = new CaptureDelegate();
var od = Interlocked.CompareExchange(ref _pickerDelegate, ndelegate, null);
if (od != null)
{
throw new InvalidOperationException("同一时间只可激活一次");
}
var view = new CaptureController(ndelegate);
view.MediaTypes = new[] { p_isPhoto ? "public.image" : "public.movie" };
view.SourceType = UIImagePickerControllerSourceType.Camera;
view.CameraDevice = p_options.UseFrontCamera ? UIImagePickerControllerCameraDevice.Front : UIImagePickerControllerCameraDevice.Rear;
view.AllowsEditing = p_options.AllowCropping;
if (p_isPhoto)
{
view.CameraCaptureMode = UIImagePickerControllerCameraCaptureMode.Photo;
}
else if (p_options is CaptureVideoOptions voptions)
{
view.CameraCaptureMode = UIImagePickerControllerCameraCaptureMode.Video;
view.VideoQuality = (voptions.VideoQuality == 0) ? UIImagePickerControllerQualityType.Low : UIImagePickerControllerQualityType.High;
view.VideoMaximumDuration = voptions.DesiredLength.TotalSeconds;
}
viewController.PresentViewController(view, true, null);
return(ndelegate.Task.ContinueWith(t =>
{
Dismiss(view);
return t.Result;
}));
}
// 参见 https://github.com/jamesmontemagno/MediaPlugin
/// <summary>
/// 拍照
/// </summary>
/// <param name="p_options">选项</param>
/// <returns>照片文件信息，失败或放弃时返回null</returns>
public Task <FileData> TakePhoto(CapturePhotoOptions p_options = null)
{
return(new CameraCapture().TakePhoto(p_options));
}
