Android Question Migrating from Http to OkHttp

I HAVE

Dim webclient As OkHttpClient
Dim webrequest As OkHttpRequest

THEN

Sub webClient_ResponseSuccess (resp As OkHttpResponse, TaskId As Int)

xml = resp.GetString("UTF8")

RELATED TO THE OLD Http LIBRARY.

What is the equivalent instruction for OkHttp???

Many many thanks to solvers.