我试图有一个表单，当我填写它将填充一个列表视图，但似乎不能得到该列表与任何值popuate。
我使用以下代码来创建底部导航：

class _AppState extends State<App> {
  int _currentIndex = 0;
  final List<Widget> body = [
    AddNewStudent(),
    StudentList(),
  ];

在格式如下所示的文件中：

class StudentClass {
  String kidFirstName;
  String kidLastName;
  DateTime dateOfBirth;
  int totalAttedance = 0;
  int attedanceAtRank = 0;

  StudentClass(
      {required this.kidFirstName,
      required this.kidLastName,
      required this.dateOfBirth});
}

class AddNewStudent extends StatefulWidget {
  @override
  AddStudentScreen createState() => AddStudentScreen();
}

class AddStudentScreen extends State<AddNewStudent> {
  List<StudentClass> studentList = [];
  void addStudent(StudentClass newStudent) {
    setState(() {
      studentList.add(newStudent);
    });
  }
  
  final formKey = GlobalKey<FormState>();
Widget build(BuildContext context) {
    return Container(
        margin: EdgeInsets.all(20.0),
        child: SingleChildScrollView(
            child: Column(
          children: [
            Form(
              key: formKey,
              child: Column(
                children: [
                  kidsFirstNameFormField(),
                  kidLastNameFormField(),
                  kidDateofBirth(),
                  submitButton(),
                ],
              ),
            ),
          ],
        )));
  }
Widget submitButton() {
    return ElevatedButton(
      child: Text('Create New Student Profile'),
      onPressed: () {
        if (formKey.currentState?.validate() ?? false) {
          formKey.currentState?.save();
          StudentClass newStudent = StudentClass(
            kidFirstName: kidFirstName,
            kidLastName: kidLastName,
            dateOfBirth: dateOfBirth,
          );
          addStudent(newStudent);
          formKey.currentState?.reset();
        }
      },
    );
  }

列表视图构建器位于其自己的文件中：

class StudentList extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    List<StudentClass> studentList = [];
    return Scaffold(
      appBar: AppBar(
        title: Text('Student List'),
      ),
      body: StudentListState(
        studentList: studentList,
      ),
    );
  }
}

class StudentListState extends StatefulWidget {
  final List<StudentClass> studentList;
  StudentListState({required this.studentList});
  @override
  _StudentListState createState() => _StudentListState();
}

class _StudentListState extends State<StudentListState> {
  void addStudent(StudentClass student) {
    setState(() {
      widget.studentList.add(student);
    });
  }

  @override
  Widget build(BuildContext context) {
    return Container(
        margin: EdgeInsets.all(20.0),
        child: ListView.builder(
          itemCount: widget.studentList.length,
          itemBuilder: (context, index) {
            return ListTile(
              title: Text(widget.studentList[index].kidFirstName),
              subtitle: Text(widget.studentList[index].kidLastName),
              trailing: Text(widget.studentList[index].dateOfBirth.toString()),
            );
          },
        ));
  }
}

我很难弄清楚如何将信息传递给列表来填充。我已经让它构建起来没有错误，但不知何故，我知道我没有正确传递它。我知道我可能在这里有一个额外的列表。