I have a PCL type app and I'm using the Xam.Plugin.Media
plugin. I need it to ensure a user submits a photo from the camera before they can continue.
To do this I show the camera page from a button click event and I want to ensure that in case the user cancels out of this that the app launches the camera again, this would repeat until a photograph is stored.
Currenty my app falls in the onActivityResumed
method of the MainApplication
file when the user cancels out of the camera
Attached photo of my code, My code .
private async void TakePicture()
{
await CrossMedia.Current.Initialize();
if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
{
await App.Current.MainPage.DisplayAlert("No Camera", ":( No camera available.", "Aceptar");
}
file = await CrossMedia.Current.TakePhotoAsync(new Plugin.Media.Abstractions.StoreCameraMediaOptions
{
Directory = "Sample",
Name = "test.jpg",
PhotoSize = PhotoSize.Small,
});
//IsRunning = true;
if (file != null)
{
ImageSource = ImageSource.FromStream(() =>
{
var stream = file.GetStream();
return stream;
});
}
IsRunning = false;
}
Aside from the fact that it is usually a bit of a UX issue to force a user into anything nowadays, the question still has some merits.
this is the approach that I would consider, it involves recursion.
private async void TakePicture()
{
await CrossMedia.Current.Initialize();
if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
{
await App.Current.MainPage.DisplayAlert("No Camera", ":( No camera available.", "Aceptar");
}
file = await CrossMedia.Current.TakePhotoAsync(new Plugin.Media.Abstractions.StoreCameraMediaOptions
{
Directory = "Sample",
Name = "test.jpg",
PhotoSize = PhotoSize.Small,
});
//IsRunning = true;
if (file != null)
{
ImageSource = ImageSource.FromStream(() =>
{
var stream = file.GetStream();
return stream;
});
}
else
{
// Recursion - I believe that this would continue until the file is not null, then it would carry on.
TakePicture();
}
IsRunning = false;
}
I can't say I use recursion that often, but I think it might do the trick here.
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