xamarin android自动调整google地图的大小

using Android.App;
using Android.OS;
using Android.Views;
using Android.Widget;
using Android.Gms.Maps;
using Android.Gms.Maps.Model;

namespace XamarinMapDemo
{
    [Activity(Label = "MapActivity")]
    public class MapActivity : Activity, IOnMapReadyCallback
    {
        private GoogleMap googleMap;
        private MapView mapView;

        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.MapLayout);

            mapView = FindViewById<MapView>(Resource.Id.mapView);
            mapView.OnCreate(savedInstanceState);
            mapView.GetMapAsync(this);
        }

        public void OnMapReady(GoogleMap map)
        {
            googleMap = map;
            // 在这里可以对地图进行进一步的设置和操作
            // 例如添加标记、设置地图类型等

            // 自动调整地图大小
            ViewTreeObserver observer = mapView.ViewTreeObserver;
            observer.AddOnGlobalLayoutListener(new MyGlobalLayoutListener(mapView));
        }

        protected override void OnResume()
        {
            base.OnResume();
            mapView.OnResume();
        }

        protected override void OnPause()
        {
            base.OnPause();
            mapView.OnPause();
        }

        protected override void OnDestroy()
        {
            base.OnDestroy();
            mapView.OnDestroy();
        }

        private class MyGlobalLayoutListener : Java.Lang.Object, ViewTreeObserver.IOnGlobalLayoutListener
        {
            private MapView mapView;

            public MyGlobalLayoutListener(MapView mapView)
            {
                this.mapView = mapView;
            }

            public void OnGlobalLayout()
            {
                // 调整地图大小以适应屏幕
                LatLngBounds.Builder builder = new LatLngBounds.Builder();
                // 添加地图上的标记点
                // builder.Include(marker1.Position);
                // builder.Include(marker2.Position);
                LatLngBounds bounds = builder.Build();
                int padding = 50; // 调整地图边界的填充值
                CameraUpdate cu = CameraUpdateFactory.NewLatLngBounds(bounds, padding);
                mapView.Map.MoveCamera(cu);

                // 只需要调整一次，因此在调整后移除监听器
                mapView.ViewTreeObserver.RemoveOnGlobalLayoutListener(this);
            }
        }
    }
}