private void InitializeAndStartBarcodeScanning()
{
// Create data capture context using your license key.
this.dataCaptureContext = DataCaptureContext.ForLicenseKey(SCANDIT_LICENSE_KEY);
// Use the default camera with the recommended camera settings for the BarcodeCapture mode
// and set it as the frame source of the context. The camera is off by default and must be
// turned on to start streaming frames to the data capture context for recognition.
// See resumeFrameSource and pauseFrameSource below.
this.camera = Camera.GetDefaultCamera();
if (this.camera == null)
{
throw new NullReferenceException(
"Sample depends on a camera, which failed to initialize.");
}
// Use the settings recommended by barcode capture.
this.dataCaptureContext.SetFrameSourceAsync(this.camera);
// The settings instance initially has all types of barcodes (symbologies) disabled. For the purpose of this
// sample we enable the QR symbology. In your own app ensure that you only enable the symbologies that your app
// requires as every additional enabled symbology has an impact on processing times.
var barcodeCaptureSettings = BarcodeCaptureSettings.Create();
barcodeCaptureSettings.EnableSymbology(Symbology.Qr, true);
// Create new barcode capture mode with the settings from above.
barcodeCapture = BarcodeCapture.Create(dataCaptureContext, barcodeCaptureSettings);
// By default, every time a barcode is scanned, a sound (if not in silent mode) and a
// vibration are played. In the following we are setting a success feedback without sound
// and vibration.
barcodeCapture.Feedback.Success = new Feedback();
// Register self as a listener to get informed whenever a new barcode got recognized.
barcodeCapture.AddListener(this);
// To visualize the on-going barcode capturing process on screen, setup a data capture view
// that renders the camera preview. The view must be connected to the data capture context.
this.dataCaptureView = DataCaptureView.Create(this, this.dataCaptureContext);
// Add a barcode capture overlay to the data capture view to render the location of captured
// barcodes on top of the video preview.
// This is optional, but recommended for better visual feedback.
overlay = BarcodeCaptureOverlay.Create(this.barcodeCapture, this.dataCaptureView);
// Add a square viewfinder as we are only scanning square QR codes.
overlay.Viewfinder = RectangularViewfinder.Create(RectangularViewfinderStyle.Square, RectangularViewfinderLineStyle.Light);
// Adjust the overlay's barcode highlighting to match the new viewfinder styles and improve the visibility of feedback.
// With 6.10 we will introduce this visual treatment as a new style for the overlay.
this.highlightingBrush = new Brush(fillColor: Android.Graphics.Color.Transparent,
strokeColor: Android.Graphics.Color.White,
strokeWidth: 3);
overlay.Brush = this.highlightingBrush;
SetContentView(this.dataCaptureView);
}
private void InitializeAndStartBarcodeScanning()
{
// Create data capture context using your license key.
this.dataCaptureContext = DataCaptureContext.ForLicenseKey(SCANDIT_LICENSE_KEY);
// Use the default camera and set it as the frame source of the context.
// The camera is off by default and must be turned on to start streaming frames to the data
// capture context for recognition.
// See resumeFrameSource and pauseFrameSource below.
this.camera = Camera.GetDefaultCamera();
if (this.camera != null)
{
// Use the settings recommended by barcode capture.
this.camera.ApplySettingsAsync(BarcodeCapture.RecommendedCameraSettings);
this.dataCaptureContext.SetFrameSourceAsync(this.camera);
}
// The barcode capturing process is configured through barcode capture settings
// which are then applied to the barcode capture instance that manages barcode recognition.
BarcodeCaptureSettings barcodeCaptureSettings = BarcodeCaptureSettings.Create();
// The settings instance initially has all types of barcodes (symbologies) disabled.
// For the purpose of this sample we enable a very generous set of symbologies.
// In your own app ensure that you only enable the symbologies that your app requires as
// every additional enabled symbology has an impact on processing times.
HashSet <Symbology> symbologies = new HashSet <Symbology>();
symbologies.Add(Symbology.Ean13Upca);
symbologies.Add(Symbology.Ean8);
symbologies.Add(Symbology.Upce);
symbologies.Add(Symbology.Qr);
symbologies.Add(Symbology.DataMatrix);
symbologies.Add(Symbology.Code39);
symbologies.Add(Symbology.Code128);
symbologies.Add(Symbology.InterleavedTwoOfFive);
barcodeCaptureSettings.EnableSymbologies(symbologies);
// Some linear/1d barcode symbologies allow you to encode variable-length data.
// By default, the Scandit Data Capture SDK only scans barcodes in a certain length range.
// If your application requires scanning of one of these symbologies, and the length is
// falling outside the default range, you may need to adjust the "active symbol counts"
// for this symbology. This is shown in the following few lines of code for one of the
// variable-length symbologies.
SymbologySettings symbologySettings =
barcodeCaptureSettings.GetSymbologySettings(Symbology.Code39);
ICollection <short> activeSymbolCounts = new HashSet <short>(
new short[] { 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 });
symbologySettings.ActiveSymbolCounts = activeSymbolCounts;
// Create new barcode capture mode with the settings from above.
this.barcodeCapture = BarcodeCapture.Create(this.dataCaptureContext, barcodeCaptureSettings);
// Register self as a listener to get informed whenever a new barcode got recognized.
barcodeCapture.AddListener(this);
// To visualize the on-going barcode capturing process on screen, setup a data capture view
// that renders the camera preview. The view must be connected to the data capture context.
this.dataCaptureView = DataCaptureView.Create(this, this.dataCaptureContext);
// Add a barcode capture overlay to the data capture view to render the location of captured
// barcodes on top of the video preview.
// This is optional, but recommended for better visual feedback.
BarcodeCaptureOverlay overlay = BarcodeCaptureOverlay.Create(this.barcodeCapture, this.dataCaptureView);
overlay.Viewfinder = RectangularViewfinder.Create();
SetContentView(this.dataCaptureView);
}
