search if not found, get value of the search

[yogithesymbian]

how to get value on searching items ?
i need to implement if the data is not found on items list, just get the last search text and in my BE create the data.

override fun onNothingSelected(adapterView: AdapterView<*>) {
                Log.e(TAG_LOG,"on nothing bro")
            }

on above code didnt run when i click gray screen .

when i click on gray screen, i got this message

W/InputEventReceiver: Attempted to finish an input event but the input event receiver has already been disposed.