在Windows上通过Xamarin使用Google地图

using Xamarin.Forms;
using Xamarin.Forms.Xaml;

[assembly: XamlCompilation(XamlCompilationOptions.Compile)]
namespace YourNamespace
{
    public partial class App : Application
    {
        public App()
        {
            InitializeComponent();

            // 初始化地图服务
            Xamarin.FormsMaps.Init("YOUR_GOOGLE_MAPS_API_KEY");

            MainPage = new MainPage();
        }
    }
}

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:maps="clr-namespace:Xamarin.Forms.Maps;assembly=Xamarin.Forms.Maps"
             x:Class="YourNamespace.MainPage">
    <ContentPage.Content>
        <StackLayout>
            <maps:Map x:Name="map" />
        </StackLayout>
    </ContentPage.Content>
</ContentPage>

using Xamarin.Forms;
using Xamarin.Forms.Maps;

namespace YourNamespace
{
    public partial class MainPage : ContentPage
    {
        public MainPage()
        {
            InitializeComponent();

            // 设置地图的初始位置
            var initialPosition = new Position(37.79752, -122.40183);
            map.MoveToRegion(MapSpan.FromCenterAndRadius(initialPosition, Distance.FromMiles(1)));

            // 在地图上添加标记
            var pin = new Pin
            {
                Position = initialPosition,
                Label = "San Francisco",
                Address = "California, USA"
            };
            map.Pins.Add(pin);
        }
    }
}