Form Submission Page in Flutter

 import 'package:flutter/material.dart';

 void main() {
   runApp(HomeScreen());
 }

 class HomeScreen extends StatefulWidget {
   @override
   _MyAppState createState() => _MyAppState();
 }

 class _MyAppState extends State<HomeScreen> {
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
      title: "FormValidation",
      home: MyHomePage(),
     );
   }
 }

 class MyHomePage extends StatefulWidget {
   @override
   _MyHomePageState createState() => _MyHomePageState();
 }

 class _MyHomePageState extends State<MyHomePage> {
   final GlobalKey<FormState> _formKey = GlobalKey();
   String email = "";
   String password = "";

  void _submit() {
    print('Name: $email'); // Print the name
    print('Email: $password');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(" Login " ),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          children: <Widget>[
            Form(
              key: _formKey,
              child: Column(
                children: <Widget>[
                  TextFormField(
                    decoration: InputDecoration(labelText: 'E-Mail'),
                    keyboardType: TextInputType.emailAddress,
                    onChanged: (value) {
                      setState(() {
                        email = value!;
                      });

                      print("email$email");

                     },
                     validator: (value) {
                      if (value!.isEmpty || !value.contains('@')) {
                         return 'Invalid email!';
                       }
                       return null;
                     },
                   ),
                   TextFormField(
                     decoration: InputDecoration(labelText: 'password'),
                     keyboardType: TextInputType.visiblePassword,
                     obscureText: true,
                     validator: (value) {
                       if (value!.isEmpty && value.length < 7) {
                         return 'Invalid password!';
                       }
                       return null;
                    },
                     onChanged: (value) {
                       setState(() {
                         password = value!;
                       });
 
                       print(password);
 
                    },
                   ),
                   ElevatedButton(
                     onPressed: _submit,
                     child: Text("submit"),
                   ),
                 ],
               ),
             ),

             SizedBox(
               height: 20,
             ),
             Column(
               children: <Widget>[
                 email.isEmpty ? Text("No data") : Text(email),
                  SizedBox(
                   height: 10,
                ),
                 password.isEmpty ? Text("No Data") : Text(password),
               ],
             )
           ],
         ),
       ),
     );
   }
 }