public BarcodeScannerRenderer(Context context) : base(context)
{
MainLayout =
(ConstraintLayout)LayoutInflater.FromContext(context).Inflate(Resource.Layout.BarcodeTracker, null);
AddView(MainLayout);
CameraSourcePreview = MainLayout.FindViewById <CameraSourcePreview>(Resource.Id.preview);
CloseScannerButton = MainLayout.FindViewById <ImageButton>(Resource.Id.closeScannerBtn);
CloseScannerButton.Click += async delegate
{
await Xamarin.Forms.Application.Current.MainPage.Navigation.PopModalAsync();
};
MGraphicOverlay = MainLayout.FindViewById <GraphicOverlay>(Resource.Id.faceOverlay);
BarcodeDetector detector = new BarcodeDetector.Builder(Application.Context)
.Build();
detector.SetProcessor(
new MultiProcessor.Builder(new GraphicBarcodeTrackerFactory(MGraphicOverlay, this)).Build());
if (!detector.IsOperational)
{
// Note: The first time that an app using barcode API is installed on a device, GMS will
// download a native library to the device in order to do detection. Usually this
// completes before the app is run for the first time. But if that download has not yet
// completed, then the above call will not detect any barcodes.
//
// IsOperational can be used to check if the required native library is currently
// available. The detector will automatically become operational once the library
// download completes on device.
Android.Util.Log.Warn(TAG, "Barcode detector dependencies are not yet available.");
}
MCameraSource = new CameraSource.Builder(Application.Context, detector)
.SetAutoFocusEnabled(true)
.SetFacing(Android.Gms.Vision.CameraFacing.Back)
.SetRequestedFps(15.0f)
.Build();
var torchFab = FindViewById <FloatingActionButton>(Resource.Id.fab_torchlight);
var hasFlashlight = Context.PackageManager.HasSystemFeature(PackageManager.FeatureCameraFlash);
if (!hasFlashlight)
{
torchFab.Hide();
}
else
{
torchFab.Click += TorchFab_Click;
}
StartCameraSource();
}
