kotlin.TypeCastException: null cannot be cast to non-null type kotlin.collections.MutableList

Question

please dont marked as duplicate , as the question is slightly different ---> null cannot be cast to non-null type kotlin.collections.MutableList

Answer 1

Can't find a reason to use MutableList but your issue is incorrect type cast (dataList as MutableList). This is cause null cannot be cast to non-null type. You can simplify code using class CartAdapter(private val context: Context, private val dataList: ArrayList?) and remove var dataList: MutableList, private val context: Context and init{}