Question

I am designing an android application for which I want to use web view (html) for the whole UI part though it is not completely dependent on web. Is there any harm if I don’t use xml buttons, textviews etc.

As I am more comfortable in html5 , so do I need to learn xml UI of android or carry forward using html5 approach.

Answer 1

I am sure there is no Harm if you just load your HTML or website inside the WebView (through the complete app).

Android has always been about connectivity and providing a great web
browsing experience, so building your app with web technologies can be
a great opportunity. Not only can you build an app on the web and
still optimize your designs for Android’s various screen sizes and
densities, but you can also embed web-based content into your Android
app using WebView.

Read more Web Apps.

If you want to deliver a web application (or just a web page) as a
part of a client application, you can do it using WebView.

Read more Building Web Apps in WebView

And i would suggest you to check this document: Best Practices for Web Apps