我正在開發Xamarin Android項目,我想用MvvmCross實現拍照。在Xamarin Android中使用MvvmCross拍照
這裏是我的代碼:
public class PhotoService:IPhotoService
{
private const int MaxPixelDimension = 1280;
private const int DefaultJpegQuality = 90;
private Stream imageStream;
public Stream ImageStream
{
get { return imageStream; }
set { imageStream = value; }
}
public void GetPhoto()
{
var task = Mvx.Resolve<IMvxPictureChooserTask>();
task.TakePicture(
MaxPixelDimension,
DefaultJpegQuality,
SavePicture, null);
}
private void SavePicture(Stream stream)
{
ImageStream = stream;
}
}
但在:
task.TakePicture(
MaxPixelDimension,
DefaultJpegQuality,
SavePicture,
null);
我有錯誤:
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
UPDATE
呼叫堆棧我有:
0x0 in Android.Content.Intent..ctor at /Users/builder/data/lanes/3511/501e63ce/source/monodroid/src/Mono.Android/platforms/android-24/src/generated/Android.Content.Intent.cs:1275,6 C# 0x12 in MvvmCross.Plugins.PictureChooser.Droid.MvxPictureChooserTask.TakePicture C#
0x3A in App.Services.PhotoService.PhotoService.GetPhoto at C:\app\App.Services\PhotoService\PhotoService.cs:38,4 C#
0x7 in App.ViewModels.ViewModels.MainViewModel.TakePhoto at C:\app\App.ViewModels\ViewModels\MainViewModel.cs:49,4 C#
您是否有更多信息?如堆棧跟蹤。可能是內部異常? – Cheesebaron
@Cheesebaron問題已更新 – Quiet
這看起來不像整個堆棧跟蹤。 – Cheesebaron