tec_with_animated_builder_test.dart

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(title: 'Material App', home: Home());
  }
}

class Home extends StatefulWidget {
  const Home({
    Key? key,
  }) : super(key: key);

  @override
  State<Home> createState() => _HomeState();
}

class _HomeState extends State<Home> {
  final tec1 = TextEditingController();
  final tec2 = TextEditingController();
  late final Listenable listenable;
  @override
  void initState() {
    super.initState();
    listenable = Listenable.merge([tec1, tec2]);
  }

  @override
  void dispose() {
    tec1.dispose();
    tec2.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Material App Bar')),
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Center(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.center,
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              TextField(
                controller: tec1,
                decoration: const InputDecoration(
                  hintText: 'TEC1',
                  border: OutlineInputBorder(),
                ),
              ),
              const SizedBox(height: 10),
              TextField(
                controller: tec2,
                decoration: const InputDecoration(
                  hintText: 'TEC2',
                  border: OutlineInputBorder(),
                ),
              ),
              const SizedBox(height: 10),
              AnimatedBuilder(
                animation: listenable,
                builder: (context, child) {
                  debugPrint("TEXT REBUILD");
                  return Text('tec1: ${tec1.text}\ntec2: ${tec2.text}');
                },
              ),
            ],
          ),
        ),
      ),
    );
  }
}