Android Kotlin UI Async Http request - AsyncTask or Custom Libraries?

Question

Specifically trying do some non-blocking http operations within a UI context.

1. I read up on coroutines whicch blew my tiny mind, couldn't work out how to invoke a declarative suspend method from a UI event.

2. Had a fair crack with AsyncTask in conjunction with URL(addr).openStream(), which seemed ok, but I couldn't seem find any good examples where a lambda was being passed in for the oncomplete processing. All the examples seemed to just directly name the control instances in the in the onPostExecute function.

I was keen to find a more reusable pattern, perhaps in the styley of jquery's ajax pattern.

3. The Fuel http client library seems pretty good, I've knocked this together which seems to do the trick:

   val url_public_ip: String = "http://ipinfo.io/json"
   val url_fake_data: String = "https://jsonplaceholder.typicode.com/photos"
   
   fun btnGetPublicIp_Click(view: View){
       getData(url_public_ip, txtData) 
   }
   
   fun btnGetMockData_Click(view: View){
       getData(url_fake_data, txtData) 
   }
   
   fun getData(url: String, control: TextView){
       control.text = "Querying..."
   
       // Fuel based async request.
       url.httpGet().responseString { request, response, result ->
           when (result) {
               is Result.Failure -> {
                   var error: String? = result.getAs()
   
                   control.text = error
               }
               is Result.Success -> {
                   var data: String? = result.getAs()
   
                   control.text = data
               }
           }
       } 
   }
   

So, the question:

Is anyone else using other custom libs to do this & what kinda stuff are you guys using?