inavlid argument(s) /Exception caught by widgets library - flutter

Question

I have an empty card widget which I used it for opening adding page, my problem is when I pushed from main categories screen I can add main category, but When I used this empty card button on sub category screen of any main category, add screen is opening but when I pushed add I took invalid argument(s) error app is broken. How can ı solve this issue?.
class EmptyCard extends StatelessWidget {
EmptyCard({this.where});
final String where;
#override
Widget build(BuildContext context) {
return Padding(
padding: EdgeInsets.only(top:15.0),
child: TextButton(
onPressed: (){
if(where=="homeScreen"){
showModalBottomSheet(
context: context,
builder: (BuildContext context)=> AddMenuScreen(buttonText: "Menü Ekle",route:where),
);
}
else if(where=="subCategoryScreen"){
showModalBottomSheet(
context: context,
builder: (BuildContext context)=> AddMenuScreen(buttonText: "Tarif Ekle",route:where),
);
}
},
child: Container(
height: 180,
width: 180,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(30),
color: Colors.black12.withOpacity(0.1),
),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Icon(Icons.add_circle_outline_outlined,size: 100,color: Colors.grey.shade400,),
],
),
),
),
);
}
}
class AddMenuScreen extends StatefulWidget {
AddMenuScreen({this.categoryId,this.buttonText, this.route});
final int categoryId;
final String route;
final String buttonText;
static String id="addMenuScreen";
#override
_AddMenuScreenState createState() => _AddMenuScreenState();
}
class _AddMenuScreenState extends State<AddMenuScreen> {
final stickerList= List<String>.generate(23, (index) => "images/sticker$index");
int selectedIndex=-1;
Color _containerForStickersInactiveColor=Colors.white;
Color _containerForStickersActiveColor=Colors.black12;
String chosenImagePath;
String newCategoryName;
int addScreenImageNum;
#override
Widget build(BuildContext context) {
return Material(
child: Container(
color: kColorTheme9,
child: Container(
height: 400,
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.only(topRight: Radius.circular(40),topLeft: Radius.circular(40)),
),
child:Padding(
padding:EdgeInsets.all(20.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisAlignment: MainAxisAlignment.start,
children: [
Container(
decoration: BoxDecoration(
color: kColorTheme2,
borderRadius: BorderRadius.circular(90)
),
child: TextField(
style: TextStyle(
color: Colors.black,
fontFamily:"Graduate",
fontSize: 20,
),
textAlign: TextAlign.center,
onChanged: (value){
newCategoryName=value;
},
decoration: InputDecoration(
border:OutlineInputBorder(
borderRadius: BorderRadius.circular(90),
borderSide: BorderSide(
color: Colors.teal,
),
),
hintText: "Menü ismi belirleyin",
hintStyle: TextStyle(
color: Colors.black.withOpacity(0.2),
fontFamily: "Graduate",
),
),
),
),
SizedBox(height: 20,),
Text(" Yana kadırarak menünüz icin bir resim secin",textAlign: TextAlign.center,
style: TextStyle(fontFamily: "Graduate", fontSize: 12),),
SizedBox(height: 20,),
Expanded(
child: ListView.builder(
scrollDirection: Axis.horizontal,
itemCount: stickerList.length,
itemBuilder: (context,index){
return Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(30),
color: index == selectedIndex ?
_containerForStickersActiveColor :
_containerForStickersInactiveColor,
),
child:TextButton(
child: Image(
image: AssetImage("images/sticker$index.png"),
),
onPressed: (){
setState(() {
selectedIndex = index;
});
},
),
);
}
),
),
SizedBox(height: 20,),
Container(
decoration: BoxDecoration(
border: Border.all(style: BorderStyle.solid),
color: kColorTheme7,
borderRadius: BorderRadius.circular(90),
),
child: TextButton(
onPressed: (){
if(widget.route=="homeScreen"){
Navigator.pop(context, ModalRoute.withName(HomeScreen.id));
Navigator.pushReplacement(context, MaterialPageRoute(builder: (context)=>HomeScreen(newCategoryName: newCategoryName,
newCategoryImagePath: "images/sticker$selectedIndex.png")));
}
else if(widget.route=="subCategoryScreen"){
Navigator.pop(context, ModalRoute.withName(SubCategoriesScreen.id));
Navigator.pushReplacement(context, MaterialPageRoute(builder: (context)=>SubCategoriesScreen(categoryId: widget.categoryId,subCategoryName: newCategoryName,
subCategoryImagePath:"images/sticker$selectedIndex.png" )));
}
},
child: Text(widget.buttonText, style: TextStyle(fontSize: 20, color: Colors.white,
fontFamily: "Graduate", fontWeight: FontWeight.bold),),
),
),
],
),
),
),
),
);
}
}
class _SubCategoriesScreenState extends State<SubCategoriesScreen> {
void initState(){
super.initState();
if(widget.categoryId!=null && widget.subCategoryImagePath!=null && widget.subCategoryName!=null){
addSubCategory();
}
}
void addSubCategory(){
SubCategoryModel subCategoryModel=SubCategoryModel(
subCategoryId:widget.categoryId,
subCategoryImagePath: widget.subCategoryImagePath,
subCategoryName: widget.subCategoryName,
categoryColor: Color((Random().nextDouble() * 0xFFFFFF).toInt()).withOpacity(0.5));
if(categoryModels!=null){
for (var categoryModel in categoryModels){
if (categoryModel.categoryId == subCategoryModel.subCategoryId){
categoryModel.subCategoryModels.insert(categoryModel.subCategoryModels.length-1,subCategoryModel);
}
}
}
}
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
appBar: AppBar(
automaticallyImplyLeading: false,
centerTitle: true,
title: BorderedText(
child:Text(
categoryModels[widget.categoryId].categoryName,
style: TextStyle(
color: Color(0XFFFFFB00),
fontSize: 30,
fontFamily: "Graduate"
),
),
strokeWidth: 5,
strokeColor: Colors.black,
),
elevation: 5,
backgroundColor: Color(0xFFF2C3D4).withOpacity(1),
leading: IconButton(
icon: Icon(Icons.arrow_back),
onPressed: (){
Navigator.pop(context);
},
iconSize: 40,
color: Color(0xFFA2000B),
),
actions: [
CircleAvatar(
radius: 27,
backgroundColor: Colors.transparent,
backgroundImage: AssetImage("images/cuttedlogo.PNG"),
)
],
),
body: Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage("images/logoBGopacity.png"),
fit: BoxFit.cover,
),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Expanded(
child: GridView.builder(
scrollDirection: Axis.vertical,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),
itemCount:categoryModels[widget.categoryId].subCategoryModels.length,
itemBuilder: (context,index){
if(categoryModels[widget.categoryId].subCategoryModels[index].subCategoryId==-1){
return EmptyCard(where: "subCategoryScreen");
}
return SubCategoryCard(subCategoryId:widget.categoryId,subcategoryName: categoryModels[widget.categoryId].subCategoryModels[index].subCategoryName,
subCategoryImagePath: categoryModels[widget.categoryId].subCategoryModels[index].subCategoryImagePath,
subCategoryColor: categoryModels[widget.categoryId].subCategoryModels[index].categoryColor,);
}
),
),
Column(
mainAxisAlignment: MainAxisAlignment.end,
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Padding(
padding: EdgeInsets.all(10),
child: Container(
decoration: BoxDecoration(
border: Border.all(style: BorderStyle.solid),
color: kColorTheme7,
borderRadius: BorderRadius.circular(40),
),
child: TextButton(
onPressed: (){
showModalBottomSheet(
context: context,
builder: (BuildContext context)=> AddMenuScreen(categoryId:widget.categoryId,buttonText: "Tarif Ekle", route:"subCategoryScreen"),
);
},
child: BorderedText(
strokeWidth: 5,
strokeColor: Colors.black,
child:Text("Tarif Ekle",style: TextStyle(
color: Colors.white,
fontFamily:'Graduate',
fontSize:30,
),
),
),
),
),
),
],
)
],
),
),
),
);
}
}
Error:
======== Exception caught by widgets library =======================================================
The following ArgumentError was thrown building SubCategoriesScreen(dirty, state: _SubCategoriesScreenState#72f75):
Invalid argument(s)
The relevant error-causing widget was:
SubCategoriesScreen file:///C:/Users/yagiz/AndroidStudioProjects/lezzet_kitabi/lib/screens/add_menu_screen.dart:121:98
When the exception was thrown, this was the stack:
#0 List.[] (dart:core-patch/growable_array.dart:254:60)
#1 _SubCategoriesScreenState.build (package:lezzet_kitabi/screens/subCategoriesScreen.dart:61:29)
#2 StatefulElement.build (package:flutter/src/widgets/framework.dart:4742:27)
#3 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4625:15)
#4 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4797:11)