MvxTintSpinner for AppCompat v21

gistfile1.cs

    /// <summary>
    /// Tint-aware version of MvxSpinner so that it's styled properly
    /// with AppCompat V21
    /// </summary>
    public class MvxTintSpinner : MvxSpinner
    {
        private static readonly int[] TintAttrs =
        {
            Android.Resource.Attribute.Background,
            Android.Resource.Attribute.PopupBackground
        };

        public MvxTintSpinner(Context context, IAttributeSet attributes)
            : base(context, attributes)
        {
            TintTypedArray a = TintTypedArray.ObtainStyledAttributes(
                context, attributes, TintAttrs, Android.Resource.Attribute.SpinnerStyle, 0);

            SetBackgroundDrawable(a.GetDrawable(0));
            if ((int)Build.VERSION.SdkInt >= 16 && a.HasValue(1))
                SetPopupBackgroundDrawable(a.GetDrawable(1));

            a.Recycle();
        }
    }

Then in your AppCompatViewFactory from kjeremy/gist:5b76cb2eb82ff6caa046

case "MvxSpinner":
    return new MvxTintSpinner(context, attrs);