// this is called on any error while processing the document image
// Note: this is called every time an error occurs in a run, so that might be quite often
// An error message should only be presented to the user after some time
void IDocumentResultListener.OnPreviewProcessingFailure(DocumentScanView.DocumentError error)
{
if (_toast != null)
{
_toast.Cancel();
}
var e = error.ToString();
string text = "";
if (e.Equals(DocumentScanView.DocumentError.DocumentNotSharp.ToString()))
{
text += "Document is not sharp. Please hold the camera steadily and ensure the document is in focus.";
}
if (e.Equals(DocumentScanView.DocumentError.DocumentSkewTooHigh.ToString()))
{
text += "Document is skewed. Place the camera directly above the document.";
}
if (e.Equals(DocumentScanView.DocumentError.DocumentOutlineNotFound.ToString()))
{
text += "Could not detect document outline.";
}
if (e.Equals(DocumentScanView.DocumentError.GlareDetected.ToString()))
{
text += "Please remove the glare.";
}
if (e.Equals(DocumentScanView.DocumentError.ImageTooDark.ToString()))
{
text += "The image is too dark. Please ensure there is enough light.";
}
if (e.Equals(DocumentScanView.DocumentError.Unknown.ToString()))
{
text += "Unknown Failure.";
}
if (text != "")
{
_toast = Toast.MakeText(this, text, ToastLength.Short);
_toast.Show();
}
}
// handle an error while processing the full picture here - the preview will be restarted automatically
void IDocumentResultListener.OnPictureProcessingFailure(DocumentScanView.DocumentError error)
{
String text = "Error scanning full document. ";
String e = error.ToString();
if (e.Equals(DocumentScanView.DocumentError.DocumentNotSharp.ToString()))
{
text += "Document is not sharp. Please hold the camera steadily and ensure the document is in focus.";
}
if (e.Equals(DocumentScanView.DocumentError.DocumentSkewTooHigh.ToString()))
{
text += "Document is skewed. Place the camera directly above the document.";
}
if (e.Equals(DocumentScanView.DocumentError.DocumentOutlineNotFound.ToString()))
{
text += "Could not detect document outline.";
}
if (e.Equals(DocumentScanView.DocumentError.GlareDetected.ToString()))
{
text += "Please remove the glare.";
}
if (e.Equals(DocumentScanView.DocumentError.ImageTooDark.ToString()))
{
text += "The image is too dark. Please ensure there is enough light.";
}
if (e.Equals(DocumentScanView.DocumentError.Unknown.ToString()))
{
text += "Unknown Failure.";
}
_toast = Toast.MakeText(this, text, ToastLength.Long);
_toast.Show();
if (_progressDialog != null && _progressDialog.IsShowing)
{
_progressDialog.Dismiss();
}
_imageViewFull.SetImageBitmap(null);
}