같은 예제로 DiffUtil / AsyncListDiffer / ListAdapter을 사용하자면 아래와 같습니다 DiffUtilpackage com.example.co_timerimport android.view.LayoutInflaterimport android.view.ViewGroupimport androidx.recyclerview.widget.AsyncListDifferimport androidx.recyclerview.widget.DiffUtilimport androidx.recyclerview.widget.ListAdapterimport androidx.recyclerview.widget.RecyclerViewimport androidx.recyclerview.widget.Recycler..