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public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
	protected override void OnCreate(Bundle bundle)
	{
		base.OnCreate(bundle);

		global::Xamarin.Forms.Forms.Init(this, bundle);
		Microsoft.WindowsAzure.MobileServices.CurrentPlatform.Init();
		LoadApplication(new App());
	}

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// ...

async Task UpdateSelectedItem ()
{
	await Task.Delay(300);
	SelectedItem = SelectedIndex > -1 ? Children[SelectedIndex].BindingContext : null;
}

// ...

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public class App : Application
{
	public IEnumerable<ICarouselViewModel> _pages;

	public App()
	{		
		_pages = new List<ICarouselViewModel>()
		{
			new PageOneViewModel(),
			new PageTwoViewModel()

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public HomePage(CarouselLayout.IndicatorStyleEnum indicatorStyle)
{
    _indicatorStyle = indicatorStyle;

    viewModel = new SwitcherPageViewModel();
    BindingContext = viewModel;

    Title = _indicatorStyle.ToString();

    relativeLayout = new RelativeLayout 

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void ItemsSourceChanged ()
{
    if (ItemsSource == null) return;
    CreateTabs();
}

void CreateTabs()
{
    if(Children != null && Children.Count > 0) Children.Clear();

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void ItemsSourceChanged ()
{
    if (ItemsSource == null) return;

    var countDelta = ItemsSource.Count - Children.Count;

    if (countDelta > 0) {
        for (var i = 0; i < countDelta; i++) 
        {
            CreateDot();

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public enum IndicatorStyleEnum
{
    None,
    Dots,
    Tabs
}

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void NativeScrolled (object sender, EventArgs e)
{
    var center = _native.ContentOffset.X + (_native.Bounds.Width / 2);
    ((CarouselLayout)Element).SelectedIndex = ((int)center) / ((int)_native.Bounds.Width);
}

void ElementPropertyChanged(object sender, PropertyChangedEventArgs e) {
    if (e.PropertyName == CarouselLayout.SelectedIndexProperty.PropertyName && !Dragging) {
        ScrollToSelection (false);
    }

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void SnapScroll ()
{
    var roughIndex = (float)_scrollView.ScrollX / _scrollView.Width;

    var targetIndex = 
        _deltaX < 0 ? Math.Floor (roughIndex)
        : _deltaX > 0 ? Math.Ceil (roughIndex)
        : Math.Round (roughIndex);

    ScrollToIndex ((int)targetIndex);

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public static readonly BindableProperty ItemsSourceProperty =
    BindableProperty.Create<CarouselLayout, IList> (
        view => view.ItemsSource,
        null,
        propertyChanging: (bindableObject, oldValue, newValue) => {
        ((CarouselLayout)bindableObject).ItemsSourceChanging ();
    },
        propertyChanged: (bindableObject, oldValue, newValue) => {
        ((CarouselLayout)bindableObject).ItemsSourceChanged ();
    }