Does anyone have idea how to solve this error : "only safe (?.) Or non-null asserted(!!.) Calls are allowed on a nullable receiver of type cursor?" I'm trying to extract contacts using ContactsContract content provider by query which return response as a Cursor

Cursor can be null, you can see it in

query

method signature, it annotated with

@Nullable

Just check for cursor nullability in your condition and Kotlin smart cast will handle it for you:

if (cursor != null && cursor.count > 0)

i was a kotlin newbie not too long ago, double bang (!!) is always best to avoid, from what i've read. i got dinged pretty hard on an interview problem for using double bang (rightfully so i believe)