gistfile1.txt

public class VectorImageViewRenderer : ImageRenderer
    {
		static readonly NGraphics.IPlatform Platform = new AndroidPlatform();
        protected override void OnElementChanged(ElementChangedEventArgs<Image> e)
        {
            base.OnElementChanged(e);

            if (e.OldElement == null)
            {
                this.DrawImage();
            }
        }

        protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            base.OnElementPropertyChanged(sender, e);

            DrawImage();
        }

        async void DrawImage()
        {
			var vectorImage = (VectorImageView)Element;
            int width = (int)Element.WidthRequest;
            int height = (int)Element.HeightRequest;

            if (width == 0 || height == 0)
            {
                return;
            }
            
			var image = await ImageCacheService.GetImage(vectorImage.Vector, width, height, vectorImage.Color);
            Control.SetImageDrawable(image);
        }

    }