void regenerate()
{
if (formsView != null && formsView.BarcodeValue != null)
{
var writer = new ZXing.Mobile.BarcodeWriter();
if (formsView != null && formsView.BarcodeOptions != null)
{
writer.Options = formsView.BarcodeOptions;
}
if (formsView != null && formsView.BarcodeFormat != null)
{
writer.Format = formsView.BarcodeFormat;
}
var value = formsView != null ? formsView.BarcodeValue : string.Empty;
Device.BeginInvokeOnMainThread(() =>
{
var image = writer.Write(value);
imageView.Source = image;
});
}
}
protected override void OnElementChanged(ElementChangedEventArgs <ZXingBarcodeImageView> e)
{
formsView = Element;
if (imageView == null)
{
imageView = new ImageView(Xamarin.Forms.Forms.Context);
base.SetNativeControl(imageView);
}
if (formsView != null && formsView.BarcodeValue != null)
{
var writer = new ZXing.Mobile.BarcodeWriter();
if (formsView != null && formsView.BarcodeOptions != null)
{
writer.Options = formsView.BarcodeOptions;
}
if (formsView != null && formsView.BarcodeFormat != null)
{
writer.Format = formsView.BarcodeFormat;
}
var value = formsView != null ? formsView.BarcodeValue : string.Empty;
var image = writer.Write(value);
imageView.SetImageBitmap(image);
}
base.OnElementChanged(e);
}
public virtual Stream Create(BarCodeCreateConfiguration cfg) {
#if __ANDROID__
var writer = new ZXing.BarcodeWriter {
Format = (BarcodeFormat)Enum.Parse(typeof(BarcodeFormat), cfg.Format.ToString()),
Encoder = new MultiFormatWriter(),
Options = new EncodingOptions {
Height = cfg.Height,
Margin = cfg.Margin,
Width = cfg.Height,
PureBarcode = cfg.PureBarcode
}
};
#endif
#if __IOS__
var writer = new ZXing.Mobile.BarcodeWriter
{
Format = (BarcodeFormat)Enum.Parse(typeof(BarcodeFormat), cfg.Format.ToString()),
Encoder = new MultiFormatWriter(),
Options = new EncodingOptions
{
Height = cfg.Height,
Margin = cfg.Margin,
Width = cfg.Height,
PureBarcode = cfg.PureBarcode
}
};
#endif
return this.ToImageStream(writer, cfg);
}
private UIImage GetQRCode(string url)
{
var writer = new ZXing.Mobile.BarcodeWriter {
Format = BarcodeFormat.QR_CODE,
Options = new ZXing.Common.EncodingOptions {
Height = 250,
Width = 250
}
};
return(writer.Write(url));
}
public Stream ConvertImageStream(string text, int width = 500, int height = 500)
{
var barcodeWriter = new ZXing.Mobile.BarcodeWriter
{
Format = ZXing.BarcodeFormat.QR_CODE,
Options = new ZXing.Common.EncodingOptions
{
Width = width,
Height = height,
Margin = 2
}
};
barcodeWriter.Renderer = new ZXing.Mobile.BitmapRenderer();
var bitmap = barcodeWriter.Write(text);
var stream = new MemoryStream();
bitmap.Compress(Bitmap.CompressFormat.Jpeg, 100, stream); // this is the diff between iOS and Android
stream.Position = 0;
return(stream);
}
void regenerate()
{
if (formsView != null && formsView.BarcodeValue != null)
{
var writer = new ZXing.Mobile.BarcodeWriter();
if (formsView != null && formsView.BarcodeOptions != null)
{
writer.Options = formsView.BarcodeOptions;
}
if (formsView != null && formsView.BarcodeFormat != null)
{
writer.Format = formsView.BarcodeFormat;
}
var value = formsView != null ? formsView.BarcodeValue : string.Empty;
var image = writer.Write(value);
imageView.SetImageBitmap(image);
}
}
public Bitmap GenerateQrImage(string content, int width, int height)
{
var writer = new ZXing.Mobile.BarcodeWriter
{
Format = BarcodeFormat.QR_CODE,
Options = new ZXing.Common.EncodingOptions
{
Height = height,
Width = width,
Margin = 0,
PureBarcode = true,
}
};
writer.Renderer = new ZXing.Mobile.BitmapRenderer {
Background = Color.Red, Foreground = Color.Black
};
var bitmap = writer.Write(content);
//var stream = new MemoryStream();
//bitmap.Compress(Bitmap.CompressFormat.Png, 100, stream); // this is the diff between iOS and Android
//stream.Position = 0;
return(bitmap);
}
protected SensusServiceHelper()
{
if (SINGLETON != null)
throw new SensusException("Attempted to construct new service helper when singleton already existed.");
_stopped = true;
_registeredProtocols = new ObservableCollection<Protocol>();
_runningProtocolIds = new List<string>();
_healthTestCallbackId = null;
_idCallback = new Dictionary<string, ScheduledCallback>();
_hasher = new SHA256Managed();
_pointsOfInterest = new List<PointOfInterest>();
// ensure that the entire QR code is always visible by using 90% the minimum screen dimension as the QR code size.
#if __ANDROID__
int qrCodeSize = (int)(0.9 * Math.Min(XLabs.Platform.Device.Display.Metrics.WidthPixels, XLabs.Platform.Device.Display.Metrics.HeightPixels));
#elif __IOS__
int qrCodeSize = (int)(0.9 * Math.Min(AppleDevice.CurrentDevice.Display.Height, AppleDevice.CurrentDevice.Display.Width));
#else
#error "Unrecognized platform"
#endif
_barcodeWriter = new ZXing.Mobile.BarcodeWriter
{
Format = BarcodeFormat.QR_CODE,
Options = new ZXing.Common.EncodingOptions
{
Height = qrCodeSize,
Width = qrCodeSize
}
};
if (!Directory.Exists(SHARE_DIRECTORY))
Directory.CreateDirectory(SHARE_DIRECTORY);
#if DEBUG || UNIT_TESTING
LoggingLevel loggingLevel = LoggingLevel.Debug;
#elif RELEASE
LoggingLevel loggingLevel = LoggingLevel.Normal;
#else
#error "Unrecognized configuration."
#endif
_logger = new Logger(LOG_PATH, loggingLevel, Console.Error);
_logger.Log("Log file started at \"" + LOG_PATH + "\".", LoggingLevel.Normal, GetType());
GpsReceiver.Get().Initialize(Geolocator); // initialize GPS receiver with platform-specific geolocator
if (Insights.IsInitialized)
_logger.Log("Xamarin Insights is already initialized.", LoggingLevel.Normal, GetType());
else if (string.IsNullOrWhiteSpace(XAMARIN_INSIGHTS_APP_KEY))
_logger.Log("Xamarin Insights API key is empty. Not initializing.", LoggingLevel.Normal, GetType()); // xamarin allows to initialize with a null key, which fails with exception but results in IsInitialized being true. prevent that here.
else
{
try
{
_logger.Log("Initializing Xamarin Insights.", LoggingLevel.Normal, GetType());
// wait for startup crash to be logged -- https://insights.xamarin.com/docs
Insights.HasPendingCrashReport += (sender, isStartupCrash) =>
{
if (isStartupCrash)
Insights.PurgePendingCrashReports().Wait();
};
InitializeXamarinInsights();
}
catch (Exception ex)
{
_logger.Log("Failed to initialize Xamarin insights: " + ex.Message, LoggingLevel.Normal, GetType());
}
}
}
