Accessibility Button Demo 

readme.md

Accessibility Button Demo 

Created with <3 with dartpad.dev.

main.dart

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const FontSizeChanger(),
    );
  }
}

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

  @override
  State<FontSizeChanger> createState() => _FontSizeChangerState();
}

class _FontSizeChangerState extends State<FontSizeChanger> {
  double _fontSize = 14.0;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Accessibility Button Demo'),
      ),
      body: Center(
        child: Semantics(
          label: 'Increase font size', // <-- Semantics label
          child: Focus(
            onFocusChange: (hasFocus) {
              if (hasFocus) {
                setState(() {
                  _fontSize += 2.0;
                });
              }
            },
            child: Text(
              'Hello World',
              style: TextStyle(fontSize: _fontSize),
            ),
          ),
        ),
      ),
    );
  }
}