public ScanPage(MainPage mainPage) : base() { zxing = new ZXingScannerView { HorizontalOptions = LayoutOptions.FillAndExpand, VerticalOptions = LayoutOptions.FillAndExpand, AutomationId = "zxingScannerView", }; zxing.OnScanResult += (result) => { zxing.Unfocus(); zxing.IsScanning = false; zxing.IsAnalyzing = false; Device.BeginInvokeOnMainThread(async() => { await Navigation.PopAsync(); mainPage.CheckCode(result.Text); }); }; overlay = new ZXingDefaultOverlay { //TopText = "Přiložte váš telefon ke QR kódu", //BottomText = "Skenování se provede automaticky", ShowFlashButton = zxing.HasTorch, AutomationId = "zxingDefaultOverlay", }; overlay.FlashButtonClicked += (sender, e) => { zxing.IsTorchOn = !zxing.IsTorchOn; }; var grid = new Grid { VerticalOptions = LayoutOptions.FillAndExpand, HorizontalOptions = LayoutOptions.FillAndExpand, }; grid.Children.Add(zxing); grid.Children.Add(overlay); // The root page of your application Content = grid; }