<android kotlin shared preferences unresolved refe...

# stackoverflow

[user]

android kotlin shared preferences unresolved reference getSharedPreferences error
I am learning Kotlin by trying to build a small app that find and and remember last connected BLE device. To recognize the last connected device I decide to save its MAC address using shared preferences (is that the best way to do that is also a question). I use a tutorial online and it worked well (I didn't remember the page) but today when I open the project to continue the job it gives me error - unresolved reference getSharedPreferences. My question is what is the problem - I get lost :)...