Compas Android XAMARIN FORMS (GUI)

using System;
using System.IO;
using System.Text;
using Xamarin.Essentials;
using Xamarin.Forms;

namespace BrujulaAndroid
{
    public partial class MainPage : ContentPage
    {
        public MainPage()
        {
            InitializeComponent();
        }
        public static void Main()
        {
            string[] imgs;
            TapGestureRecognizer imageTapGesture = new TapGestureRecognizer();
            TapGestureRecognizer labelTapGesture = new TapGestureRecognizer();
            //Inicio de Método anónimo del controlador de interfaz gráfica
            Ui.RunOnUiThread(()=>
            {
                imgs = new string[5]; int sn=3; int ar=1;
                imgs[0]="assets/files/preciosaex1.png";
                imgs[1]="assets/files/preciosaex2.png";
                imgs[2]="assets/files/preciosaex3.png";
                imgs[3]="assets/files/preciosaex4.png";
                imgs[4]="assets/files/preciosaex5.png";
                Random sourceNumber = new Random();
                //Creando contenedor principal de elementos visuales
                StackLayout stack = new StackLayout();
                stack.Orientation = StackOrientation.Vertical;
                Ui.Orientation = XamarinFormsUiLib.ScreenOrientation.Portrait;
                stack.BackgroundColor=Color.Black;
                //Creando contenedor vertical
                var stackV = new StackLayout()
                {
                    Scale = 0.8,
                    Orientation = StackOrientation.Vertical,
                    HorizontalOptions = LayoutOptions.FillAndExpand,
                    VerticalOptions = LayoutOptions.FillAndExpand
                };
                //Creando contenedor horizontal.
                var stackH = new StackLayout()
                {
                    Orientation = StackOrientation.Horizontal,
                    HorizontalOptions = LayoutOptions.FillAndExpand,
                    VerticalOptions = LayoutOptions.FillAndExpand,
                    Scale = 0.9
                };
                var title = new Label()
                {
                    Text="\u2003\u2003\u2003\t\tCompás Naútico",
                    FontSize=23,
                    TextColor=Color.Aqua,
                    FontAttributes=FontAttributes.Bold
                };
                var info = new Label()
                {
                    Text="\t\t\t\t\t\t\t\t\t[email protected]",
                    FontSize=17,
                    TextColor=Color.GreenYellow,
                    TextDecorations = TextDecorations.Underline,
                    FontAttributes=FontAttributes.Bold
                };
                labelTapGesture.Tapped += OnLinkTapped;
                async void OnLinkTapped (object sender, EventArgs linkargs)
                {
                    await Browser.OpenAsync("WEB LINK", BrowserLaunchMode.SystemPreferred);
                }
                info.GestureRecognizers.Add(labelTapGesture);
                var info2 = new Label()
                {
                    Text="\u2003\u2003\t\tColocar el dispositivo horizontalmente",
                    FontSize=15,
                    TextColor=Color.LightYellow,
                    FontAttributes=FontAttributes.Bold
                };
                //Fijando el pin marcador mediante Label
                var pin = new Label()
                {
                    Text = "\u21A7",
                    FontSize = 33,
                    Margin = new Thickness(0,0,0,0),
                    FontAttributes = FontAttributes.Bold,
                    HorizontalOptions = LayoutOptions.Center
                };
                //Enlazando el TextColorProperty del puntero.
                pin.SetBinding(Label.TextColorProperty, "Color.Red");
                var north = new Label()
                {
                    Text = "N",
                    FontSize = 27,
                    FontAttributes = FontAttributes.Bold,
                    HorizontalOptions = LayoutOptions.Center
                };
                north.SetBinding(Label.TextColorProperty, "Color.Yellow");
                var south = new Label()
                {
                    Text = "S",
                    FontSize = 30,
                    FontAttributes = FontAttributes.Bold,
                    HorizontalOptions = LayoutOptions.Center
                };
                south.SetBinding(Label.TextColorProperty, "Color.Aqua");
                var west = new Label()
                {
                    Text = "O",
                    FontSize = 30,
                    FontAttributes = FontAttributes.Bold,
                    VerticalOptions = LayoutOptions.Center,
                    HorizontalOptions = LayoutOptions.StartAndExpand
                };
                 west.SetBinding(Label.TextColorProperty, "Color.Aqua");
                var east = new Label()
                {
                    Text = "E",
                    FontSize = 30,
                    FontAttributes = FontAttributes.Bold,
                    VerticalOptions = LayoutOptions.Center,
                    HorizontalOptions = LayoutOptions.EndAndExpand
                };
                 east.SetBinding(Label.TextColorProperty, "Color.Aqua");
                var bear = new Label()
                {
                    Text = ".",
                    TextColor=Color.Yellow,
                    FontAttributes=FontAttributes.Bold,
                    FontSize = 28,
                    BackgroundColor=Color.Blue,
                    MinimumWidthRequest = 300,
                    MinimumHeightRequest = 300,
                    VerticalOptions = LayoutOptions.CenterAndExpand,
                    HorizontalOptions = LayoutOptions.CenterAndExpand
                };
                var Referencia = new Label()
                {
                    TextColor = Color.White,
                    FontSize = 20,
                    BackgroundColor = Color.Blue,
                    FontAttributes = FontAttributes.Bold,
                    VerticalOptions = LayoutOptions.Center,
                    HorizontalOptions = LayoutOptions.CenterAndExpand
                };
                Referencia.SetBinding(Label.TextProperty, "Norte");
                Image Espego = new Image
                {

                    Source = "assets/files/preciosaex5.png",
                };
                imageTapGesture.Tapped += OnImageTapped;
                void OnImageTapped (object sender, EventArgs args)
                {
                    InTap:
                    ar=sn;
                    sn = sourceNumber.Next(0,5);
                    if (sn == ar) goto InTap;
                    Espego.Source= imgs[sn];
                }
                Espego.GestureRecognizers.Add(imageTapGesture);
                var di = DeviceDisplay.MainDisplayInfo;

                //Método de cálculo de parámetros de elementos gráficos
                void Translate()
                {
                    pin.TranslationY = di.Height / di.Density / 9;
                    north.TranslationY = di.Height / di.Density / 9;
                    south.TranslationY = -(di.Height / di.Density / 9);
                }
                Translate(); //Llamada del método paramétrico.
                //Evento de llamada y visualización.
                DeviceDisplay.MainDisplayInfoChanged += (sdr, args) =>
                {
                    di = args.DisplayInfo;
                    Translate();
                };
                //Agregando elementos en su orden a los contenedores.
                stackH.Children.Add(west);
                stackH.Children.Add(bear);
                stackH.Children.Add(east);

                stackV.Children.Add(north);
                stackV.Children.Add(stackH);
                stackV.Children.Add(south);

                stack.Children.Add(title);
                stack.Children.Add(info);
                stack.Children.Add(info2);
                stack.Children.Add(Espego);

                stack.Children.Add(pin);
                stack.Children.Add(Referencia);
                stack.Children.Add(stackV);
                //Suscribiendo elementos al controlador de datos
                Compass.ReadingChanged += (sdr, e) =>
                {
                    stackV.Rotation = -e.Reading.HeadingMagneticNorth;
                    //Manteniendo inmóvil el centro de rotación.
                    bear.Rotation = e.Reading.HeadingMagneticNorth;
                    bear.Text = e.Reading.HeadingMagneticNorth.ToString("0°");
                    double Lecture = Convert.ToDouble((bear.Text).TrimEnd('°'));
                    if(bear.Text!="0°")
                    {
                        north.TextColor=Color.Yellow;
                        pin.TextColor=Color.Red;
                    }
                    if(bear.Text!="90°")
                    {
                        east.TextColor=Color.Blue;
                        pin.TextColor=Color.Red;
                    }
                    if(bear.Text!="180°")
                    {
                        south.TextColor=Color.Blue;
                        pin.TextColor=Color.Red;
                    }
                    if(bear.Text!="270°")
                    {
                        west.TextColor=Color.Blue;
                        pin.TextColor=Color.Red;
                    }
                    if (bear.Text == "0°" || bear.Text == "360°")
                    {
                        north.TextColor=Color.Red;
                        pin.TextColor = Color.Red;
                    }
                    if (bear.Text == "90°")
                    {
                        east.TextColor=Color.Yellow;
                        pin.TextColor=Color.Yellow;
                    }
                    if (bear.Text == "180°")
                    {
                        south.TextColor=Color.Yellow;
                        pin.TextColor=Color.Yellow;
                    }
                    if (bear.Text == "270°")
                    {
                        west.TextColor=Color.Yellow;
                        pin.TextColor=Color.Yellow;
                    }
                    if (Lecture==0 || Lecture==360) Referencia.Text="Norte";
                    if (Lecture==90) Referencia.Text="Este";
                    if (Lecture==180) Referencia.Text="Sur";
                    if (Lecture==270) Referencia.Text="Oeste";
                    if (0<Lecture & Lecture<90)
                    {
                        Referencia.Text="NorEste";
                    }
                    if (90<Lecture & Lecture<180)
                    {
                        Referencia.Text="SurEste";
                    }
                    if (180<Lecture & Lecture<270)
                    {
                        Referencia.Text="SurOeste";
                    }
                    if (270<Lecture & Lecture<360)
                    {
                        Referencia.Text="NorOeste";
                    }
                };
                //Iniciando lectura del compás.
                Compass.Start(SensorSpeed.UI);
                //Cargando la vista de la interfaz visual.
                Ui.LoadMainLayout(stack);
            });
            //Fin del evento anónimo de interfaz gráfica (GUI).
        }
    }
}