/// <summary>
/// Native implementation of scan
/// </summary>
/// <param name="topText">Text displayed at the top of the layout</param>
/// <param name="bottomText">Text displayed at the bottom of the layout</param>
/// <param name="cameraUnsupportedMessage">Unsupported camera message</param>
/// <returns>Native scan result</returns>
protected override async Task <ZXing.Result> ScanNative(string topText, string bottomText, string cameraUnsupportedMessage)
{
// Current activity
var currentActivity = Mvx.IoCProvider.Resolve <IMvxAndroidCurrentTopActivity>().Activity;
// Initialize the scanner first so we can track the current context
MobileBarcodeScanner.Initialize(currentActivity.Application);
// Create a new instance of our scanner
var scanner = new MobileBarcodeScanner
{
UseCustomOverlay = false, // Use the default overlay
TopText = topText,
BottomText = bottomText,
CameraUnsupportedMessage = cameraUnsupportedMessage
};
try
{
// Add option for use correct resolution for mobile
var options = new MobileBarcodeScanningOptions()
{
CameraResolutionSelector = new CameraResolutionSelectorDelegate(ResolutionSelector)
};
// Start scanning
return(await scanner.Scan(options));
}
finally
{
// Uninitialize the scanner to avoid memory leaks
MobileBarcodeScanner.Uninitialize(currentActivity.Application);
}
}
/// <summary>
/// Efetua a leitura de um código de barras; Por padrão, lê qualquer formato disponível atualmente
/// </summary>
/// <param name="p_sTextoExibicao">Texto que aparecerá para o usuário durante a leitura do código.</param>
/// <returns></returns>
public async Task <string> LerCodigo(string p_sTextoExibicao, bool p_bAutoFoco)
{
string sRet = string.Empty;
MobileBarcodeScanningOptions scanOptions = new MobileBarcodeScanningOptions();
scanOptions.AutoRotate = false;
scanOptions.UseNativeScanning = true;
//scanOptions.TryInverted = true;
scanOptions.PossibleFormats.Add(ZXing.BarcodeFormat.EAN_13);
//scanOptions.TryHarder = true;
scanOptions.DelayBetweenAnalyzingFrames = 712;
var scanner = new MobileBarcodeScanner();
if (!string.IsNullOrEmpty(p_sTextoExibicao))
{
scanner.TopText = p_sTextoExibicao;
}
ZXing.Result zRet = null;
new Thread(new ThreadStart(delegate
{
while (zRet == null)
{
scanner.AutoFocus();
Thread.Sleep(1916);
}
})).Start();
zRet = await scanner.Scan(scanOptions);
if (zRet != null)
{
sRet = (!string.IsNullOrEmpty(zRet.Text) ? zRet.Text : "");
}
MobileBarcodeScanner.Uninitialize(app);
return(sRet);
}
public void Dispose()
{
MobileBarcodeScanner.Uninitialize(_application);
}