WebView not working

I want to use WebView and TextInput on same page/view, but after going through various examples, the examples or documentation given are not working in preview on android device. In some examples Android.WebView and NativeViewHost has been used, but it ends up with error on building. I also tried adding Fuse.Android and Fuse.Android.Views and Fuse.Android.Controls but that too not working.

Except the following code, all webview examples are showing unexpected behaviour or ends up with error: