CustomPresenter.cs

public override void Show(MvxViewModelRequest request)
		{
			if (request.ViewModelType == typeof(SettingsViewModel))
			{
				var page = CreatePage(request);
				var viewModel = LoadViewModel(request);
				page.DataContext = viewModel;

				var vc = page.CreateViewController();
				var attr = new MvxTabPresentationAttribute
				{
					TabName = "Settings",
					TabIconName = "SettingsTabIcon"
				};
				vc.Title = attr.TabName;
				this.ShowTabViewController(vc, attr, request);
				if (UIDevice.CurrentDevice.CheckSystemVersion(11, 0))
				{
					vc.NavigationController.NavigationBar.PrefersLargeTitles = true;
				}
			}
			else if (request.ViewModelType == typeof(SettingsDroneDetailsViewModel))
			{
				var page = CreatePage(request);
				var viewModel = LoadViewModel(request);
				page.DataContext = viewModel;
				var vc = page.CreateViewController();
				var attr = new MvxChildPresentationAttribute();
				this.ShowChildViewController(vc, attr, request);
			}
			else
			{
				base.Show(request);
			}
		}

FormsBaseActivity.cs

using Android.OS;
using MvvmCross.Forms.Views;
using MvvmCross.ViewModels;
using Xamarin.Forms.Platform.Android;

namespace Blueye.App.Droid.Views
{
	public abstract class FormsBaseActivity<TViewModel, TFormsPage> : BaseActivity<TViewModel>
		where TViewModel : class, IMvxViewModel
		where TFormsPage : MvxContentPage, new()
	{
		protected override void OnCreate(Bundle bundle)
		{
			base.OnCreate(bundle);

			SetContentView(Resource.Layout.FormsPageFrame);

			var page = new TFormsPage
			{
				DataContext = ViewModel
			};

			var pageFragment = page.CreateFragment(this);

			FragmentManager
				.BeginTransaction()
				.Replace(Resource.Id.forms_page_frame, pageFragment)
				.DisallowAddToBackStack()
				.Commit();
		}
	}
}

FormsBaseFragment.cs

using Android.OS;
using MvvmCross.Forms.Views;
using MvvmCross.ViewModels;
using Xamarin.Forms.Platform.Android;

namespace Blueye.App.Droid.Views
{
	public abstract class FormsBaseFragment<TViewModel, TFormsPage> : BaseFragment<TViewModel> 
		where TViewModel : class, IMvxViewModel
		where TFormsPage : MvxContentPage, new ()
	{
		protected override int FragmentLayoutId => Resource.Layout.FormsPageFrame;

		public override void OnCreate(Bundle savedInstanceState)
		{
			base.OnCreate(savedInstanceState);

			var page = new TFormsPage
			{
				DataContext = ViewModel
			};

			var pageFragment = page.CreateSupportFragment(Activity);

			ChildFragmentManager
				.BeginTransaction()
				.Replace(Resource.Id.forms_page_frame, pageFragment)
				.DisallowAddToBackStack()
				.Commit();
		}
	}
}

FormsPageFrame.axml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:local="http://schemas.android.com/apk/res-auto"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:id="@+id/forms_page_frame" />

SettingsDroneDetailsView.cs

using Android.App;
using Blueye.App.Views;
using Blueye.App.ViewModels;
using MvvmCross.Platforms.Android.Presenters.Attributes;

namespace Blueye.App.Droid.Views
{
	[MvxActivityPresentation]
	[Activity(Theme = "@style/AppTheme")]
	public class SettingsDroneDetailsView : FormsBaseActivity<SettingsDroneDetailsViewModel, SettingsDroneDetailsPage>
	{
	}
}

SettingsView.cs

using Blueye.App.Views;
using Blueye.App.ViewModels;
using MvvmCross.Platforms.Android.Presenters.Attributes;

namespace Blueye.App.Droid.Views
{
	[MvxFragmentPresentation(typeof(MiniHomeViewModel), Resource.Id.container)]
	public class SettingsView : FormsBaseFragment<SettingsViewModel, SettingsPage>
	{
	}
}

Setup.cs

// On Droid:
protected override MvxBindingBuilder CreateBindingBuilder() => new MvxFormsAndroidBindingBuilder();

// On iOS:
protected override MvxBindingBuilder CreateBindingBuilder() => new MvxFormsIosBindingBuilder();