Adding a custom view to a page not working in PDFTron.Android for Xamarin

I’m trying to use PDFTron for Xamarin Android. I want to render and paint my custom annotations, without using their annotation system. According to their documentation in You can add a CustomRelativeLayout which doesn’t work. It basically renders nothing in top of the PDF

enter image description here

I hosted the whole solution in here so it’s easy to test and see if someone can see what’s wrong.


Please kindly try to only post the same question once on one platform. I will continue answering this question on SO: