public void DidScan(IScanSession session)
{
if (session.NewlyRecognizedCodes.Count > 0)
{
Barcode code = session.NewlyRecognizedCodes [0];
Console.WriteLine("Código escaneado: {0}, '{1}'", code.SymbologyName, code.Data);
// Call GC.Collect() before stopping the scanner as the garbage collector for some reason does not
// collect objects without references asap but waits for a long time until finally collecting them.
GC.Collect();
// Stop the scanner directly on the session.
session.StopScanning();
// If you want to edit something in the view hierarchy make sure to run it on the UI thread.
RunOnUiThread(() => {
AlertDialog alert = new AlertDialog.Builder(this)
.SetTitle(code.SymbologyName + " Código de barras detectado")
.SetMessage(code.Data)
.SetPositiveButton("OK", delegate {
picker.StartScanning();
})
.SetOnCancelListener(this)
.Create();
alert.Show();
});
}
}
protected override void OnResume()
{
base.OnResume();
paused = false;
if ((int)Build.VERSION.SdkInt >= 23)
{
GrantCameraPermissionsThenStartScanning();
}
else
{
barcodePicker.StartScanning();
}
}
protected void SetScanState(ScanState state, IScanSession scanSession)
{
scanState = state;
switch (state)
{
case ScanState.STOPPED:
if (scanSession != null)
{
scanSession.StopScanning();
}
else
{
picker.StopScanning();
}
break;
case ScanState.SCANNING:
if (HasCameraPermission())
{
picker.StartScanning();
}
else
{
RequestCameraPermission();
}
break;
}
}
protected override void OnElementChanged(ElementChangedEventArgs <PickerView> e)
{
base.OnElementChanged(e);
if (e.NewElement != null)
{
pickerView = e.NewElement;
e.NewElement.StartScanningRequested += OnStartScanningRequested;
e.NewElement.PauseScanningRequested += OnPauseScanningRequested;
barcodePicker = new BarcodePicker(context, CreateScanSettings());
SetNativeControl(barcodePicker.OverlayView.RootView);
onScanListener = new PickerOnScanListener
{
PickerView = pickerView,
ContinuousAfterScan = pickerView.Settings.ContinuousAfterScan
};
barcodePicker.SetOnScanListener(onScanListener);
ApplyOverlaySettings();
barcodePicker.StartScanning();
}
if (e.OldElement != null)
{
e.OldElement.StartScanningRequested -= OnStartScanningRequested;
e.OldElement.PauseScanningRequested -= OnPauseScanningRequested;
}
}
public override void DidScan(BarcodePicker picker, IScanSession session)
{
if (session.NewlyRecognizedCodes.Count > 0)
{
Barcode code = session.NewlyRecognizedCodes.GetItem <Barcode> (0);
Console.WriteLine("barcode scanned: {0}, '{1}'", code.SymbologyString, code.Data);
// Stop the scanner directly on the session.
session.StopScanning();
// If you want to edit something in the view hierarchy make sure to run it on the UI thread.
UIApplication.SharedApplication.InvokeOnMainThread(() => {
UIAlertView alert = new UIAlertView()
{
Title = code.SymbologyString + " Barcode Detected", Message = "" + code.Data
};
alert.AddButton("OK");
alert.Clicked += (object o, UIButtonEventArgs e) => {
picker.StartScanning();
};
alert.Show();
});
}
}
void GrantCameraPermissionsThenStartScanning()
{
if (CheckSelfPermission(Manifest.Permission.Camera) != (int)Permission.Granted)
{
if (deniedCameraAccess == false)
{
// It's pretty clear for why the camera is required. We don't need to give a
// detailed reason.
RequestPermissions(new String[] { Manifest.Permission.Camera }, CameraPermissionRequest);
}
}
else
{
Console.WriteLine("starting scanning");
barcodePicker.StartScanning();
}
}
partial void scanButtonClicked(Foundation.NSObject sender)
{
// The scanning behavior of the barcode picker is configured through scan
// settings. We start with empty scan settings and enable a very generous
// set of symbologies. In your own apps, only enable the symbologies you
// actually need.
ScanSettings settings = ScanSettings.DefaultSettings();
NSSet symbologiesToEnable = new NSSet(
Symbology.EAN13,
Symbology.EAN8,
Symbology.UPC12,
Symbology.UPCE,
Symbology.Datamatrix,
Symbology.QR,
Symbology.Code39,
Symbology.Code128,
Symbology.ITF
);
settings.EnableSymbologies(symbologiesToEnable);
// Some 1d barcode symbologies allow you to encode variable-length data. By default, the
// Scandit BarcodeScanner 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 3 lines of code.
NSMutableSet codeLengths = new NSMutableSet();
int i = 0;
for (i = 7; i <= 20; i++)
{
codeLengths.Add(new NSNumber(i));
}
settings.SettingsForSymbology(Symbology.Code128).ActiveSymbolCounts = codeLengths;
// For details on defaults and how to calculate the symbol counts for each symbology, take
// a look at http://docs.scandit.com/stable/c_api/symbologies.html.
// Setup the barcode scanner
BarcodePicker picker = new BarcodePicker(settings);
picker.OverlayView.ShowToolBar(true);
// Add delegates for the scan and cancel event. We keep references to the
// delegates until the picker is no longer used as the delegates are softly
// referenced and can be removed because of low memory.
scanDelegate = new PickerScanDelegate();
picker.ScanDelegate = scanDelegate;
cancelDelegate = new OverlayCancelDelegate(this, picker);
picker.OverlayView.CancelDelegate = cancelDelegate;
PresentViewController(picker, true, null);
picker.StartScanning();
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
// The scanning behavior of the barcode picker is configured through scan
// settings. We start with empty scan settings and enable a generous set
// of 1D symbologies. Matrix scan is currently only supported for 1D
// symbologies, enabling 2D symbologies will result in unexpected results.
// In your own apps, only enable the symbologies you actually need.
ScanSettings settings = ScanSettings.DefaultSettings();
NSSet symbologiesToEnable = new NSSet(
Symbology.EAN13,
Symbology.EAN8,
Symbology.UPC12,
Symbology.UPCE,
Symbology.Code39,
Symbology.Code128,
Symbology.ITF
);
// Enable matrix scan and set the max number of barcodes that can be recognized per frame
// to some reasonable number for your use case. The max number of codes per frame does not
// limit the number of codes that can be tracked at the same time, it only limits the
// number of codes that can be newly recognized per frame.
settings.EnableSymbologies(symbologiesToEnable);
settings.MatrixScanEnabled = true;
settings.MaxNumberOfCodesPerFrame = 10;
settings.HighDensityModeEnabled = true;
// When matrix scan is enabled beeping/vibrating is often not wanted.
BarcodePicker picker = new BarcodePicker(settings);
picker.OverlayView.SetBeepEnabled(false);
picker.OverlayView.SetVibrateEnabled(false);
// Register a SBSScanDelegate delegate, in order to be notified about relevant events
// (e.g. a successfully scanned bar code).
scanDelegate = new PickerScanDelegate();
picker.ScanDelegate = scanDelegate;
// Register a SBSProcessFrameDelegate delegate to be able to reject tracked codes.
processFrameDelegate = new PickerProcessFrameDelegate();
picker.ProcessFrameDelegate = processFrameDelegate;
AddChildViewController(picker);
picker.View.Frame = View.Bounds;
Add(picker.View);
picker.DidMoveToParentViewController(this);
picker.OverlayView.GuiStyle = GuiStyle.MatrixScan;
picker.StartScanning();
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
// The scanning behavior of the barcode picker is configured through scan
// settings. We start with empty scan settings and enable a very generous
// set of symbologies. In your own apps, only enable the symbologies you
// actually need.
ScanSettings settings = ScanSettings.DefaultSettings();
NSSet symbologiesToEnable = new NSSet(
Symbology.EAN13,
Symbology.EAN8,
Symbology.UPC12,
Symbology.UPCE,
Symbology.Datamatrix,
Symbology.QR,
Symbology.Code39,
Symbology.Code128,
Symbology.ITF
);
settings.EnableSymbologies(symbologiesToEnable);
// Enable and set the restrict active area. This will make sure that codes are only scanned in a very thin band in the center of the image.
settings.SetActiveScanningArea(new CoreGraphics.CGRect(0, 0.48, 1, 0.04));
// Setup the barcode scanner
picker = new BarcodePicker(settings);
picker.OverlayView.ShowToolBar(false);
// Add delegate for the scan event. We keep references to the
// delegates until the picker is no longer used as the delegates are softly
// referenced and can be removed because of low memory.
scanDelegate = new PickerScanDelegate();
picker.ScanDelegate = scanDelegate;
AddChildViewController(picker);
picker.View.Frame = View.Bounds;
Add(picker.View);
picker.DidMoveToParentViewController(this);
// Modify the GUI style to have a "laser" line instead of a square viewfinder.
picker.OverlayView.GuiStyle = GuiStyle.Laser;
// Start scanning in paused state.
picker.StartScanning(true);
showAimAndScanButton();
}
void InitializeBarcodeScanning()
{
ScanSettings settings = ScanSettings.Create();
int[] symbologiesToEnable =
{
Barcode.SymbologyEan13,
Barcode.SymbologyEan8,
Barcode.SymbologyUpca,
Barcode.SymbologyUpce,
Barcode.SymbologyDataMatrix,
Barcode.SymbologyQr,
Barcode.SymbologyCode39,
Barcode.SymbologyCode128,
Barcode.SymbologyInterleaved2Of5
};
foreach (int symbology in symbologiesToEnable)
{
settings.SetSymbologyEnabled(symbology, true);
}
// Enable and set the restrict active area. This will make sure that codes are only scanned in a very thin band in the center of the image.
settings.SetActiveScanningArea(ScanSettings.OrientationPortrait, new RectF(0f, 0.48f, 1f, 0.52f));
// Setup the barcode scanner
barcodePicker = new BarcodePicker(this, settings);
// Add listener for the scan event. We keep references to the
// delegates until the picker is no longer used as the delegates are softly
// referenced and can be removed because of low memory.
barcodePicker.SetOnScanListener(this);
// Modify the GUI style to have a "laser" line instead of a square viewfinder.
barcodePicker.OverlayView.SetGuiStyle(ScanOverlay.GuiStyleLaser);
// Start scanning in paused state.
barcodePicker.StartScanning(true);
(FindViewById(Resource.Id.picker_container) as FrameLayout).AddView(barcodePicker, 0);
GrantCameraPermissionsThenStartScanning();
}
protected override void OnElementChanged(ElementChangedEventArgs <CustomStackLayout> e)
{
base.OnElementChanged(e);
//var test = this as ViewGroup;
if (e.NewElement != null)
{
// Set the app key before instantiating the picker.
ScanditLicense.AppKey = appKey;
// The scanning behavior of the barcode picker is configured through scan
// settings. We start with empty scan settings and enable a very generous
// set of symbologies. In your own apps, only enable the symbologies you
// actually need.
ScanSettings settings = ScanSettings.Create();
int[] symbologiesToEnable = new int[]
{
Barcode.SymbologyEan13,
Barcode.SymbologyEan8,
Barcode.SymbologyUpca,
Barcode.SymbologyDataMatrix,
Barcode.SymbologyQr,
Barcode.SymbologyCode39,
Barcode.SymbologyCode128,
Barcode.SymbologyInterleaved2Of5,
Barcode.SymbologyUpce
};
for (int sym = 0; sym < symbologiesToEnable.Length; sym++)
{
settings.SetSymbologyEnabled(symbologiesToEnable[sym], true);
}
//// Some 1d barcode symbologies allow you to encode variable-length data. By default, the
//// Scandit BarcodeScanner 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.
SymbologySettings symSettings = settings.GetSymbologySettings(Barcode.SymbologyCode128);
short[] activeSymbolCounts = new short[]
{
7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
};
symSettings.SetActiveSymbolCounts(activeSymbolCounts);
// For details on defaults and how to calculate the symbol counts for each symbology, take
// a look at http://docs.scandit.com/stable/c_api/symbologies.html.
picker = new BarcodePicker(this.Context, settings);
picker.OverlayView.SetViewfinderDimension(0.5f, 0.9f, 0.5f, 0.9f);
picker.OverlayView.SetTorchEnabled(false);
// Set listener for the scan event.
picker.SetOnScanListener(this);
picker.StartScanning();
//picker.Scan += (sender, args) =>
//{
//};
AddView(picker);
//SetNativeControl(picker);
}
}
private void StartScanning()
{
_picker.StartScanning();
}
public void OnCancel(IDialogInterface dialog)
{
picker.StartScanning();
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
contatinerView = new UIView(CGRect.Empty);
View.AddSubview(contatinerView);
freezeButton = new UIButton(CGRect.Empty);
freezeButton.SetTitle("Freeze", UIControlState.Normal);
freezeButton.SetBackgroundImage(UIImageExtensions.Brand.GetImage(), UIControlState.Normal);
freezeButton.TouchUpInside += (sender, e) =>
{
var scanning = picker.IsScanning();
if (scanning)
{
matrixScanHandler.Enabled = false;
picker.PauseScanning();
freezeButton.SetTitle("Done", UIControlState.Normal);
}
else
{
matrixScanHandler.RemoveAllAugmentations();
matrixScanHandler.Enabled = true;
picker.StartScanning();
freezeButton.SetTitle("Freeze", UIControlState.Normal);
}
};
View.AddSubview(freezeButton);
freezeButton.TranslatesAutoresizingMaskIntoConstraints = false;
contatinerView.TranslatesAutoresizingMaskIntoConstraints = false;
View.AddConstraints(new[]
{
contatinerView.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor),
contatinerView.TopAnchor.ConstraintEqualTo(View.TopAnchor),
contatinerView.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor),
contatinerView.BottomAnchor.ConstraintEqualTo(View.BottomAnchor),
freezeButton.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor, 20),
freezeButton.BottomAnchor.ConstraintEqualTo(View.BottomAnchor, -20),
freezeButton.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor, -20),
freezeButton.HeightAnchor.ConstraintEqualTo(60)
});
var settings = ScanSettings.DefaultSettings();
settings.SetSymbologyEnabled(Symbology.EAN13, true);
settings.MatrixScanEnabled = true;
settings.MaxNumberOfCodesPerFrame = 15;
settings.HighDensityModeEnabled = true;
picker = new BarcodePicker(settings);
picker.OverlayView.GuiStyle = GuiStyle.None;
matrixScanHandler = new MatrixScanHandler(picker);
matrixScanHandler.ShouldReject += (matrixScanHandler, trackedBarcode) => false;
// This delegate method is called every time a new frame has been processed.
// In this case we use it to update the offset of the augmentation.
matrixScanHandler.DidProcess += (sender, e) =>
{
DispatchQueue.MainQueue.DispatchAsync(() =>
{
foreach (var item in e.Frame.TrackedCodes)
{
var offset = GetYOffSet(item.Value as TrackedBarcode);
viewBasedMatrixScanOverlay.SetOffset(offset, item.Key as NSNumber);
}
});
};
viewBasedMatrixScanOverlay = new ViewBasedMatrixScanOverlay();
// This method is called every time a new barcode has been tracked.
// You can implement this method to return the offset that will be used to position the augmentation
// with respect to the center of the tracked barcode.
viewBasedMatrixScanOverlay.OffsetForOverlay += (overlay, barcode, identifier) => GetYOffSet(barcode);
// This delegate method is called every time a new barcode has been tracked.
// You can implement this method to return the view that will be used as the augmentation.
viewBasedMatrixScanOverlay.ViewForOverlay += (overlay, barcode, identifier) =>
{
if (barcode.Data == null)
{
return(new UIView(CGRect.Empty));
}
var view = new StockView(new CGRect(0, 0, StockView.StandardWidth, StockView.StandardHeight));
var model = Model.MockedModel(barcode.Data);
view.AddGestureRecognizer(new UITapGestureRecognizer(() =>
{
var overlayViewController = new OverlayViewController
{
Model = model,
ModalTransitionStyle = UIModalTransitionStyle.CoverVertical,
ModalPresentationStyle = UIModalPresentationStyle.OverCurrentContext
};
PresentViewController(overlayViewController, false, null);
}));
view.Model = model;
return(view);
};
// Add a ViewBasedMatrixScanOverlay in order to have custom UIView instances as augmentations.
matrixScanHandler.AddOverlay(viewBasedMatrixScanOverlay);
simpleMatrixScanOverlay = new SimpleMatrixScanOverlay();
// This method is called every time a new barcode has been tracked.
// You can implement this method to customize the color of the highlight.
simpleMatrixScanOverlay.ColorForOverlay += (overlay, barcode, identifier) => Model.MockedColor(barcode.Data);
// Add a SimpleMatrixScanOverlay in order to highlight the barcodes.
matrixScanHandler.AddOverlay(simpleMatrixScanOverlay);
AddChildViewController(picker);
picker.View.Frame = contatinerView.Frame;
picker.View.AutoresizingMask = UIViewAutoresizing.FlexibleHeight | UIViewAutoresizing.FlexibleWidth;
contatinerView.AddSubview(picker.View);
picker.DidMoveToParentViewController(this);
picker.StartScanning();
}