使用Xamarin.Forms在Android的标签页中隐藏底部标签栏

using Xamarin.Forms.Platform.Android;
using Xamarin.Forms;
using Android.Content;
using Android.Support.Design.Widget;
using Android.Views;

[assembly: ExportRenderer(typeof(TabbedPage), typeof(CustomTabbedPageRenderer))]
namespace YourAppName.Droid
{
    public class CustomTabbedPageRenderer : TabbedPageRenderer
    {
        public CustomTabbedPageRenderer(Context context) : base(context)
        {
        }

        protected override void OnElementChanged(ElementChangedEventArgs<TabbedPage> e)
        {
            base.OnElementChanged(e);

            if (e.NewElement != null)
            {
                // 隐藏底部标签栏
                var bottomNavigationView = (BottomNavigationView)ViewGroup.GetChildAt(0);
                bottomNavigationView.Visibility = ViewStates.Gone;
            }
        }
    }
}

using Android.App;
using Android.Content.PM;
using Android.OS;
using YourAppName.Droid;

namespace YourAppName.Droid
{
    [Activity(Label = "YourAppName", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
    public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            TabLayoutResource = Resource.Layout.Tabbar;
            ToolbarResource = Resource.Layout.Toolbar;

            base.OnCreate(savedInstanceState);

            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
            global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
            LoadApplication(new App());
        }
    }
}