void SaveDocument(SaveType type)
{
if (!SBSDK.IsLicenseValid())
{
Alert.ShowLicenseDialog(this);
return;
}
Task.Run(delegate
{
var input = adapter.GetDocumentUris().ToArray();
var output = GetOutputUri(".pdf");
if (type == SaveType.TIFF)
{
output = GetOutputUri(".tiff");
// Please note that some compression types are only compatible for 1-bit encoded images (binarized black & white images)!
var options = new TiffOptions {
OneBitEncoded = true, Compression = TiffCompressionOptions.CompressionCcittfax4, Dpi = 250
};
bool success = SBSDK.WriteTiff(input, output, options);
}
else if (type == SaveType.OCR)
{
var languages = SBSDK.GetOcrConfigs().InstalledLanguages.ToArray();
if (languages.Length == 0)
{
RunOnUiThread(delegate
{
Alert.Toast(this, "OCR languages blobs are not available");
});
return;
}
SBSDK.PerformOCR(input, languages, output);
}
else
{
SBSDK.CreatePDF(input, output, ScanbotSDK.Xamarin.PDFPageSize.FixedA4);
}
Java.IO.File file = Copier.Copy(this, output);
var intent = new Intent(Intent.ActionView, output);
var authority = ApplicationContext.PackageName + ".provider";
var uri = FileProvider.GetUriForFile(this, authority, file);
intent.SetDataAndType(uri, MimeUtils.GetMimeByName(file.Name));
intent.SetFlags(ActivityFlags.ClearWhenTaskReset | ActivityFlags.NewTask);
intent.AddFlags(ActivityFlags.GrantReadUriPermission | ActivityFlags.GrantWriteUriPermission);
RunOnUiThread(delegate
{
StartActivity(Intent.CreateChooser(intent, output.LastPathSegment));
Alert.Toast(this, "File saved to: " + output.Path);
});
});
}
void AssignOcrButtonsHandler()
{
performOcrButton = FindViewById <Button>(Resource.Id.performOcrButton);
performOcrButton.Click += delegate
{
if (!CheckScanbotSDKLicense())
{
return;
}
if (!CheckDocumentImage())
{
return;
}
performOcrButton.Post(() => {
performOcrButton.Text = "Running OCR ... Please wait ...";
performOcrButton.Enabled = false;
});
Task.Run(() => {
try
{
var pdfOutputUri = GenerateRandomFileUrlInDemoTempStorage(".pdf");
var images = new AndroidNetUri[] { documentImageUri }; // add more images for OCR here
// The SDK call is sync!
var result = SBSDK.PerformOCR(images, new [] { "en", "de" }, pdfOutputUri);
DebugLog("Recognized OCR text: " + result.RecognizedText);
DebugLog("Sandwiched PDF file created: " + pdfOutputUri);
ShowAlertDialog(result.RecognizedText, "OCR Result", () =>
{
OpenSharingDialog(pdfOutputUri, "application/pdf");
});
}
catch (Exception e)
{
ErrorLog("Error performing OCR", e);
}
finally
{
performOcrButton.Post(() => {
performOcrButton.Text = "Perform OCR";
performOcrButton.Enabled = true;
});
}
});
};
}
partial void PerformOCRUpInside(UIButton sender)
{
if (!CheckScanbotSDKLicense())
{
return;
}
if (!CheckDocumentImageUrl())
{
return;
}
Task.Run(() =>
{
DebugLog("Performing OCR ...");
var images = new NSUrl[] { documentImageUrl };
var result = SBSDK.PerformOCR(images, new[] { "en", "de" });
DebugLog("OCR result: " + result.RecognizedText);
ShowMessage("OCR Text", result.RecognizedText);
});
}
private void RecognizeText()
{
String status = "reading the recognized text";
SpeakStatus(status);
Task.Run(() => {
try
{
if (!CheckScanbotSDKLicense())
{
return;
}
var images = new AndroidNetUri[] { documentImageUri };
// SDK call is sync
var result = SBSDK.PerformOCR(images, new[] { "en", "de" });
DebugLog("Recognized OCR text: " + result.RecognizedText);
//switch to readbraille layout
Intent nextActivity = new Intent(this, typeof(ReadBraille));
nextActivity.PutExtra("text", result.RecognizedText);
if (nextActivity == null)
{
return;
}
StartActivity(nextActivity);
}
catch (Exception e)
{
ErrorLog("Error performing OCR", e);
}
});
}
private void OnSaveButtonClick(object sender, EventArgs e)
{
var input = PageRepository.DocumentImageURLs;
var docs = NSSearchPathDirectory.DocumentDirectory;
var nsurl = NSFileManager.DefaultManager.GetUrls(docs, NSSearchPathDomain.User)[0];
var controller = UIAlertController.Create(Texts.save, Texts.SaveHow, UIAlertControllerStyle.ActionSheet);
var title = "Oops!";
var body = "Something went wrong with saving your file. Please try again";
if (!SBSDK.IsLicenseValid())
{
title = "Oops";
body = "Your license has expired";
Alert.Show(this, title, body);
return;
}
var pdf = CreateButton(Texts.save_without_ocr, delegate
{
var output = new NSUrl(nsurl.AbsoluteString + Guid.NewGuid() + ".pdf");
SBSDK.CreatePDF(input, output, PDFPageSize.FixedA4);
OpenDocument(output, false);
});
var ocr = CreateButton(Texts.save_with_ocr, delegate
{
var output = new NSUrl(nsurl.AbsoluteString + Guid.NewGuid() + ".pdf");
var languages = SBSDK.GetOcrConfigs().InstalledLanguages;
try
{
SBSDK.PerformOCR(input, languages.ToArray(), output);
OpenDocument(output, true);
}
catch (Exception ex)
{
body = ex.Message;
Alert.Show(this, title, body);
}
});
var tiff = CreateButton(Texts.Tiff, delegate
{
var output = new NSUrl(nsurl.AbsoluteString + Guid.NewGuid() + ".tiff");
// Please note that some compression types are only compatible for 1-bit encoded images (binarized black & white images)!
var options = new TiffOptions {
OneBitEncoded = true, Compression = TiffCompressionOptions.CompressionCcittfax4, Dpi = 250
};
bool success = SBSDK.WriteTiff(input, output, options);
if (success)
{
title = "Info";
body = "TIFF file saved to: " + output.Path;
}
Alert.Show(this, title, body);
});
var cancel = CreateButton("Cancel", delegate { }, UIAlertActionStyle.Cancel);
controller.AddAction(pdf);
controller.AddAction(ocr);
controller.AddAction(tiff);
controller.AddAction(cancel);
UIPopoverPresentationController presentationPopover = controller.PopoverPresentationController;
if (presentationPopover != null)
{
presentationPopover.SourceView = View;
presentationPopover.PermittedArrowDirections = UIPopoverArrowDirection.Up;
}
PresentViewController(controller, true, null);
}