### Main Application Widget

Source: https://pub.dev/packages/google_fonts/example

This is the main entry point for the google_fonts demo application. It sets up the basic Material App structure with tabs for different examples.

```dart
// Copyright 2013 The Flutter Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// ignore_for_file: public_member_api_docs

import 'package:flutter/material.dart';

import 'example_font_selection.dart';
import 'example_simple.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData.light(useMaterial3: true),
      home: DefaultTabController(
        animationDuration: Duration.zero,
        length: 2,
        child: Scaffold(
          appBar: AppBar(
            title: const Text('Google Fonts Demo'),
            bottom: const TabBar(
              tabs: <Widget>[
                Tab(text: 'Simple'),
                Tab(text: 'Select a font'),
              ],
            ),
          ),
          body: const TabBarView(
            children: <Widget>[ExampleSimple(), ExampleFontSelection()],
          ),
        ),
      ),
    );
  }
}

```

--------------------------------

### Pubspec.yaml Dependency Entry

Source: https://pub.dev/packages/google_fonts/install

This is an example of how the google_fonts dependency will appear in your pubspec.yaml file after running the add command. It also implies an automatic `flutter pub get`.

```yaml
dependencies:
  google_fonts: ^8.1.0
```

--------------------------------

### Registering Font Licenses

Source: https://pub.dev/packages/google_fonts

Add font licenses to your Flutter application's LicenseRegistry. This example shows how to load a license file from assets and register it.

```dart
void main() {
  LicenseRegistry.addLicense(() async* {
    final String license = await rootBundle.loadString('google_fonts/OFL.txt');
    yield LicenseEntryWithLineBreaks(<String>['google_fonts'], license);
  });

  runApp(const MyApp());
}

```

--------------------------------

### Import google_fonts in Dart

Source: https://pub.dev/packages/google_fonts/install

Import the google_fonts package into your Dart files to start using its functionalities for integrating Google Fonts.

```dart
import 'package:google_fonts/google_fonts.dart';
```

--------------------------------

### macOS Network Entitlement for HTTP Fetching

Source: https://pub.dev/packages/google_fonts

Configure macOS entitlements to allow network access for HTTP fetching of Google Fonts. This is a platform-specific requirement for debug and release builds.

```xml
<key>com.apple.security.network.client</key>
<true/>

```

--------------------------------

### Dynamically Load Google Font

Source: https://pub.dev/packages/google_fonts

Load a Google Font dynamically by its name. This is useful when the font name might be determined at runtime.

```dart
Text('This is Google Fonts', style: GoogleFonts.getFont('Lato')),

```

--------------------------------

### Font Weight to Filename Mapping

Source: https://pub.dev/packages/google_fonts

This map shows the correspondence between FontWeight enum values and the expected filename suffixes for Google Fonts. Ensure your downloaded font files match these naming conventions.

```dart
<FontWeight, String>{
  FontWeight.w100: 'Thin',
  FontWeight.w200: 'ExtraLight',
  FontWeight.w300: 'Light',
  FontWeight.w400: 'Regular',
  FontWeight.w500: 'Medium',
  FontWeight.w600: 'SemiBold',
  FontWeight.w700: 'Bold',
  FontWeight.w800: 'ExtraBold',
  FontWeight.w900: 'Black',
};

```

--------------------------------

### Apply Google Font to Existing TextStyle

Source: https://pub.dev/packages/google_fonts

Integrate a Google Font with an existing TextStyle, allowing you to combine custom styles with the chosen font. This is useful for applying specific font properties like color or letter spacing.

```dart
Text(
  'This is Google Fonts',
  style: GoogleFonts.lato(
    textStyle: const TextStyle(color: Colors.blue, letterSpacing: .5),
  ),
),

```

--------------------------------

### Apply Google Font to Theme TextStyle

Source: https://pub.dev/packages/google_fonts

Use a Google Font with a TextStyle derived from the current theme. This allows for consistent font application across different text styles defined in your app's theme.

```dart
Text(
  'This is Google Fonts',
  style: GoogleFonts.lato(
    textStyle: Theme.of(context).textTheme.headlineMedium,
  ),
),

```

--------------------------------

### Apply Google Font to Entire Text Theme

Source: https://pub.dev/packages/google_fonts

Modify an entire TextTheme to use a specific Google Font. This is ideal for establishing a consistent typographic hierarchy throughout your application.

```dart
class MyApp extends StatelessWidget {
  // ···
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      // ···
      theme: _buildTheme(Brightness.dark),
      // ···
    );
  }
}

ThemeData _buildTheme(Brightness brightness) {
  final baseTheme = ThemeData(brightness: brightness);

  return baseTheme.copyWith(
    textTheme: GoogleFonts.latoTextTheme(baseTheme.textTheme),
  );
}


```

--------------------------------

### Add google_fonts Dependency

Source: https://pub.dev/packages/google_fonts/install

Use this command to add the google_fonts package to your Flutter project's dependencies. This command automatically updates your pubspec.yaml file.

```bash
 $ flutter pub add google_fonts
```

--------------------------------

### Modify Text Theme with Different Fonts

Source: https://pub.dev/packages/google_fonts

Customize a TextTheme by applying different Google Fonts to specific text styles. This allows for a varied typographic design within your app.

```dart
final TextTheme textTheme = Theme.of(context).textTheme;

return MaterialApp(
  // ···
  theme: ThemeData(
    textTheme: GoogleFonts.latoTextTheme(textTheme).copyWith(
      bodyMedium: GoogleFonts.oswald(textStyle: textTheme.bodyMedium),
    ),
  ),
  // ···
);


```

--------------------------------

### Use Google Font in Text Widget

Source: https://pub.dev/packages/google_fonts

Apply a Google Font directly to a Text widget using its font family name. This is the most straightforward way to use a specific font.

```dart
Text('This is Google Fonts', style: GoogleFonts.lato()),

```

--------------------------------

### Override TextStyle Properties with Google Font

Source: https://pub.dev/packages/google_fonts

Apply a Google Font and override specific TextStyle properties like fontSize, fontWeight, or fontStyle. This provides fine-grained control over the appearance of text elements.

```dart
Text(
  'This is Google Fonts',
  style: GoogleFonts.lato(
    textStyle: Theme.of(context).textTheme.displayLarge,
    fontSize: 48,
    fontWeight: FontWeight.w700,
    fontStyle: FontStyle.italic,
  ),
),

```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.