textfield_list_test.dart

import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  final tecs = List.generate(5, (_) => TextEditingController());
  @override
  void dispose() {
    for (final tec in tecs) {
      tec.dispose();
    }
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Column(children: [
      for (final tec in tecs) TextField(controller: tec),
      ElevatedButton(
          child: Text('Print'),
          onPressed: () {
            final _list = tecs.map((tec) => tec.text).toList();
            print(_list);
          })
    ]);
  }
}