How to change CheckBox text font in Flutter

In this Google flutter code example we are going to learn how to change CheckBox text font in Flutter.

You can copy and adopt this source code example to your android project without reinventing the wheel.

The code is based on flutter version 1.

Main.dart (App entry point)

import 'package:flutter/material.dart';
import 'change_text_font_family_task-11.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      //home: MyHomePage(title: 'Flutter Demo Home Page'),
      home: ChangeFontFamilyCheckbox(),
    );
  }
}

pubspec.yaml

name: food_store
description: A new Flutter project.

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# Read more about versioning at semver.org.
version: 1.0.0+1

environment:
  sdk: ">=2.0.0-dev.68.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2
  http: 0.12.0
  sqflite: 0.13.0+1
  path_provider: 0.4.1
  zoomable_image: 1.2.1+1
  multi_image_picker: 2.3.32
  dio: 2.0.22
  shared_preferences: 0.4.3


dev_dependencies:
  flutter_test:
    sdk: flutter

# For information on the generic Dart part of this file, see the
# following page: https://www.dartlang.org/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:
  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  assets:
    - assets/images/umbrella.png
  
  fonts:
    - family: AvenirNext
      fonts:
        - asset: assets/fonts/AvenirNextLTPro-Regular.otf
    - family: PlayfairDisplay
      fonts:
        - asset: assets/fonts/PlayfairDisplay-Regular.ttf
    - family: Thasadith
      fonts:
        - asset: assets/fonts/Thasadith-Regular.ttf
  # To add assets to your application, add an assets section, like this:
  # assets:
  #  - images/a_dot_burr.jpeg
  #  - images/a_dot_ham.jpeg
  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.io/assets-and-images/#resolution-aware.
  # For details regarding adding assets from package dependencies, see
  # https://flutter.io/assets-and-images/#from-packages
  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.io/custom-fonts/#from-packages

 

change_text_font_family_task-11.dart

import 'package:flutter/material.dart';

class ChangeFontFamilyCheckbox extends StatefulWidget {
  @override
  ChangeFontFamilyCheckboxState createState() {
    return new ChangeFontFamilyCheckboxState();
  }
}

class ChangeFontFamilyCheckboxState extends State<ChangeFontFamilyCheckbox> {
  bool _isChecked = true;
  List<String> _fontFamilies = [
    "AvenirNext",
    "PlayfairDisplay",
    "Thasadith",
  ];

  int _currentIndex = 0;

  _onChanged() {
    int _fontfamilyCount = _fontFamilies.length;

    setState(() {
      if (_currentIndex == _fontfamilyCount - 1) {
        _currentIndex = 0;
      } else {
        _currentIndex += 1;
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Change Font Family Checkbox Example"),
      ),
      body: Column(
        children: <Widget>[
          Expanded(
            child: Center(
              child: Row(
                children: <Widget>[
                  Checkbox(
                    value: _isChecked,
                    onChanged: (bool val) => setState(() => _isChecked = val),
                  ),
                  SizedBox(width: 12.0),
                  Text("Checkbox Text",
                      style: TextStyle(
                          fontFamily: _fontFamilies[_currentIndex],
                          fontSize: 17.0)),
                ],
              ),
            ),
          ),
          Expanded(
            child: Center(
              child: RaisedButton(
                onPressed: _onChanged,
                child: Text("Change Font Family"),
                color: Colors.red,
              ),
            ),
          ),
        ],
      ),
    );
  }
}

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