I have a spinner with some items (strings). I want to add the selected items to a list. I read online that I should use the onItemSelectedListenerrather than the
onItemSelectedListener
I implemented like this. 1. Create Empty Mutable List 2. Set onItemSelectedListner on spinner 3. When user select item add that to mutable list
Check my this answer for more info. It will help you: Android Koltin pass spinner values to mutable list