Flutter weird bug with widget function, sometimes in runs 2 times instead of one - flutter

Question

This function have futureBuilder inside and returns another function that returns ListView.
Also I do not want the user to download information from the Internet every time they visit the page, so I put the information downloaded from the Internet into a static variable in class, so i make if else. If this static variable length != 0 , it return me listView instead of make server request with futureBuilder
function that works 2 times instead of one is ListView body
And also this bug created after i added purchases to my application, maybe something wrong there. I don't have any ideas why this happend
this is my complete code
class AddCheckList extends StatefulWidget {
const AddCheckList({Key? key}) : super(key: key);
#override
_AddCheckListState createState() => _AddCheckListState();
}
class _AddCheckListState extends State<AddCheckList> {
String xQueryReqestForCheckListNames = "element CheckListList {for \$a in PACK/OBJECT where (\$a/#inUse = 'True') order by \$a/#name return element CheckList {attribute name {\$a/#name}, attribute sPaid {\$a/#isPaid},attribute oid {\$a/#oid} }}";
String serverLink = "http...";
int addCheckListMethod = 0;
// if addCheckListMethod == 0, then data will download from server and checkLists will be added from server xml data
// if addCheckListMethod == 1, then data will download from assets, and checkLists will be added from assets xml data with getXmlData function
final InAppPurchase _inAppPurchase = InAppPurchase.instance;
final String _productID = '1d7ea644f690ffa';
bool _available = true;
List<ProductDetails> _products = [];
List<PurchaseDetails> _purchases = [];
StreamSubscription<List<PurchaseDetails>>? _subscription;
#override
void initState() {
final Stream<List<PurchaseDetails>> purchaseUpdated = _inAppPurchase.purchaseStream;
_subscription = purchaseUpdated.listen((purchaseDetailsList) {
setState(() {
_purchases.addAll(purchaseDetailsList);
_listenToPurchaseUpdated(purchaseDetailsList);
});
}, onDone: () {
_subscription!.cancel();
}, onError: (error) {
_subscription!.cancel();
});
_initialize();
super.initState();
}
#override
void dispose() {
_subscription!.cancel();
super.dispose();
}
void _initialize() async {
_available = await _inAppPurchase.isAvailable();
List<ProductDetails> products = await _getProducts(
productIds: Set<String>.from(
[_productID],
),
);
setState(() {
_products = products;
});
}
void _listenToPurchaseUpdated(List<PurchaseDetails> purchaseDetailsList) {
purchaseDetailsList.forEach((PurchaseDetails purchaseDetails) async {
switch (purchaseDetails.status) {
case PurchaseStatus.pending:
// _showPendingUI();
break;
case PurchaseStatus.purchased:
case PurchaseStatus.restored:
// bool valid = await _verifyPurchase(purchaseDetails);
// if (!valid) {
// _handleInvalidPurchase(purchaseDetails);
// }
break;
case PurchaseStatus.error:
print(purchaseDetails.error!);
// _handleError(purchaseDetails.error!);
break;
default:
break;
}
if (purchaseDetails.pendingCompletePurchase) {
await _inAppPurchase.completePurchase(purchaseDetails);
}
});
}
Future<List<ProductDetails>> _getProducts({required Set<String> productIds}) async {
ProductDetailsResponse response = await _inAppPurchase.queryProductDetails(productIds);
return response.productDetails;
}
void _subscribe({required ProductDetails product}) {
final PurchaseParam purchaseParam = PurchaseParam(productDetails: product);
_inAppPurchase.buyNonConsumable(
purchaseParam: purchaseParam,
);
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: Container(padding: EdgeInsets.all(14.0), child: listViweBody(addCheckListMethod, serverLink, xQueryReqestForCheckListNames, _products,_subscribe)),
);
}
}
Widget listView(addCheckListMethod, serverLink, product,_subscribe) {
return ListView.separated(
itemCount: CheckListModel.checkListModelNamesFromServer.length,
itemBuilder: (BuildContext context, int index) {
if (CheckListModel.checkListModelNamesFromServer[index].ispaid == false) {
return InkWell(
onTap: () async {
CheckListModel checkList = CheckListModel('', 0, '', 0, 0, 0, '', [], '');
if (addCheckListMethod == 0) {
String xQueryReqestForCheckList = 'for \$a in PACK/OBJECT where \$a/#name="${CheckListModel.checkListModelNamesFromServer[index].name}" return \$a';
var data = await CheckListModel.getDataFromServer(xQueryReqestForCheckList, serverLink);
CheckListModel.addCheckListFromServer(checkList, data);
} else {
CheckListModel.addCheckList(index, checkList);
}
showDialog(
context: context,
builder: (BuildContext context) {
return AlertDialog(
title: Text("Добавить описание"),
content: Container(
decoration: BoxDecoration(border: Border.all(color: Color.fromARGB(Desing.colorFromARGBBtn[0], Desing.colorFromARGBBtn[1], Desing.colorFromARGBBtn[2], Desing.colorFromARGBBtn[3]), width: 1), borderRadius: BorderRadius.circular(10)),
child: TextField(
decoration: new InputDecoration.collapsed(hintText: "Описание", border: InputBorder.none),
maxLines: null,
onChanged: (String value) async {
checkList.description = value;
},
),
),
actions: [
TextButton(
onPressed: () {
Navigator.pop(context);
},
child: Text("Отменить"),
),
TextButton(
onPressed: () async {
await checkList.writeToFile(checkList.toJson());
CheckListModel.checkLists.add(checkList);
Navigator.pushNamed(context, '/beforeMainCheckList', arguments: {'index': CheckListModel.checkLists.length - 1});
},
child: Text('Добавить'))
],
);
});
},
child: Container(
decoration: BoxDecoration(border: Border.all(color: Color.fromARGB(Desing.colorFromARGBBtn[0], Desing.colorFromARGBBtn[1], Desing.colorFromARGBBtn[2], Desing.colorFromARGBBtn[3]), width: 1), borderRadius: BorderRadius.circular(10)),
width: 50,
height: 80,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
"${CheckListModel.checkListModelNamesFromServer[index].name}",
style: TextStyle(fontSize: 30),
)
],
),
),
);
} else {
if (product.length != 0) {
return showPurchaseCheckLists(product, index,_subscribe);
} else {
return Center(
child: CircularProgressIndicator(),
);
}
}
},
separatorBuilder: (BuildContext context, int index) {
return Container(
height: 14,
);
});
}
Widget showPurchaseCheckLists(product, index,_subscribe) {
int getCurrentProduct() {
String? checkListModelid = CheckListModel.checkListModelNamesFromServer[index].checkListId?.toLowerCase();
int indexx = 0;
for (int i = 0; i < product.length; i++) {
if (checkListModelid == product[i].id) {
indexx = i;
}
}
return indexx;
}
return InkWell(
child: Container(
decoration: BoxDecoration(border: Border.all(color: Color.fromARGB(Desing.colorFromARGBBtn[0], Desing.colorFromARGBBtn[1], Desing.colorFromARGBBtn[2], Desing.colorFromARGBBtn[3]), width: 1), borderRadius: BorderRadius.circular(10), color: Color.fromARGB(255, 240, 240, 240)),
width: 50,
height: 80,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
"${CheckListModel.checkListModelNamesFromServer[index].name}",
style: TextStyle(fontSize: 25),
),
Text("Купить за ${product[getCurrentProduct()].price}")
],
),
),
onTap: () {
_subscribe(product: product[getCurrentProduct()]);
},
);
}
Widget listViweBody(addCheckListMethod, serverLink, xQueryReqestForCheckListNames, product,_subscribe) {
if (CheckListModel.checkListModelNamesFromServer.length == 0) {
return FutureBuilder(
future: CheckListModel.getDataFromServer(xQueryReqestForCheckListNames, serverLink),
builder: (context, data) {
if (data.connectionState == ConnectionState.done) {
return listView(addCheckListMethod, serverLink, product,_subscribe);
} else {
return Center(
child: CircularProgressIndicator(),
);
}
});
} else {
return listView(addCheckListMethod, serverLink, product,_subscribe);
}
}