void HandleScanResult(ZXing.Result result)
{
string msg = "";
if (result != null && !string.IsNullOrEmpty(result.Text))
msg = "Found Barcode: " + result.Text;
else
msg = "Scanning Canceled!";
this.InvokeOnMainThread(() => {
var av = new UIAlertView("Barcode Result", msg, null, "OK", null);
av.Show();
});
}