Flutter, listen to states without BlocListener from flutter bloc package

Question

I make purchases with in_app_purchase library, and i also using bloc, because i am not that good at bloc yet i copied code from in_app_purchase examples.

this is my listenToPurchaseUpdated function

  void _listenToPurchaseUpdated(List<PurchaseDetails> purchaseDetailsList) {
    purchaseDetailsList.forEach((PurchaseDetails purchaseDetails) async {
      if (purchaseDetails.status == PurchaseStatus.purchased) {
        await _checkListRepotisory.userDidPurchase(purchaseDetails.productID);
        CheckListTemplate template = await addCheckListWhenUserBuyIt(purchaseDetails.productID, _checkListRepotisory);
        addCheckListBloc.add(AddNewCheckList(template, ""));
      }
      if (purchaseDetails.status == PurchaseStatus.restored) {
        _restoredProducts.add(purchaseDetails.productID);
      }

      if (purchaseDetails.pendingCompletePurchase) {
        await _inAppPurchase.completePurchase(purchaseDetails);
      }
    });
  }

i create bloc without of context in this way

final AddCheckListBloc addCheckListBloc = AddCheckListBloc(checkListRepository: CheckListRepository(localStorage: LocalStorage.instanse, serverStorage: ServerStorage.instanse));

In the end of AddCheckListevent i emit state NewCheckListAddedState and i need listen to it, to navigate to other screen. How i can do it ?