Data is taken from the page in the Thread, how to wait for data to be received?

Question

Android

Thread(Runnable {
            document=Jsoup.connect("......").get()

            val elements:Elements=document.getElementsByClass("nbl-slimPosterBlock__title")
  
                elements.forEach {
                 arrayList1.add(DataCard(it.text()))
                }
// здесь  размер массива равен 144
        }).start()
//здесь размер массива равен 0

The list should be displayed on the screen after starting the application, but it does not display anything, because the data does not have time to turn out, as an array of 0 elements is already displayed. How to delay it until the data is received?

Answer 1

output array here: // here array size is 144
wrap output in runOnUiThread
read about LIveData and MVVM

Answer 2

Use AsyncTask