How can I customize the auto-capitalization settings for text input fields in Flutter?

I’m developing a Flutter application and need to control the auto-capitalization behavior of text input fields. Specifically, I want to configure whether the first letter of each sentence, each word, or all characters are automatically capitalized when the user types. Additionally, I would like to know how to disable auto-capitalization entirely if needed. Could someone provide a detailed explanation and example code on how to achieve this in Flutter?

How can I customize the auto-capitalization settings for text input fields in Flutter?

>Solution :

To customize the auto-capitalization settings for text input fields in Flutter, you can use the TextCapitalization property of the TextField or TextFormField widget. This property allows you to specify how the text should be capitalized as the user types.

Here’s a example code:

Explanation

The TextCapitalization enum provides several options:

• TextCapitalization.none: No automatic capitalization.
• TextCapitalization.words: Capitalizes the first letter of each word.
• TextCapitalization.sentences: Capitalizes the first letter of each sentence.
• TextCapitalization.characters: Capitalizes all characters.

Example

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Auto-Capitalization Example'),
        ),
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            children: [
              TextField(
                decoration: InputDecoration(labelText: 'No Capitalization'),
                textCapitalization: TextCapitalization.none,
              ),
              TextField(
                decoration: InputDecoration(labelText: 'Words Capitalization'),
                textCapitalization: TextCapitalization.words,
              ),
              TextField(
                decoration: InputDecoration(labelText: 'Sentences Capitalization'),
                textCapitalization: TextCapitalization.sentences,
              ),
              TextField(
                decoration: InputDecoration(labelText: 'All Characters Capitalization'),
                textCapitalization: TextCapitalization.characters,
              ),
            ],
          ),
        ),
      ),
    );
  }
}