I am developing it using xamarin.
I want to create a comment field by image recognition.
Is there any reference source code? I do not know how to use HTMLDrawbleClass.
I would like to obtain comments from the database with REST WebEpi if possible.
When you have acquired the desired data, you can create a HtmlDrawable and simply set its .html property to a string containing the HTML content based on your data you would like it to render.
A small snippet on how to create a HtmlDrawable with custom HTML can be found here.
I ran the HTML snippet you posted in Chrome and received the following error:
Failed to load https://iwb.jp/s/js/data.json: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.
My guess is, that the WebView of the HTMLDrawable will behave the same way.
Here's a resource that might help with that issue.