flutter/dev/integration_tests/ui/lib/keyboard_textfield.dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/material.dart';
import 'package:flutter_driver/driver_extension.dart';

import 'keys.dart' as keys;

void main() {
  enableFlutterDriverExtension();

  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Keyboard & TextField',
      theme: ThemeData(primarySwatch: Colors.blue),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final ScrollController _controller = ScrollController();
  double offset = 0.0;

  @override
  void initState() {
    super.initState();
    _controller.addListener(() {
      setState(() {
        offset = _controller.offset;
      });
    });
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final bool isSoftKeyboardVisible = MediaQuery.of(context).viewInsets.bottom > 100;
    return Scaffold(
      body: Column(
        children: <Widget>[
          Text('$offset', key: const ValueKey<String>(keys.kOffsetText)),
          if (isSoftKeyboardVisible)
            const Text('keyboard visible', key: ValueKey<String>(keys.kKeyboardVisibleView)),
          Expanded(
            child: ListView(
              key: const ValueKey<String>(keys.kListView),
              controller: _controller,
              children: <Widget>[
                Container(height: MediaQuery.of(context).size.height),
                const TextField(key: ValueKey<String>(keys.kDefaultTextField)),
              ],
            ),
          ),
        ],
      ),
    );
  }
}