How to Add Autocomplete Suggestions on TextField in Flutter
Introduction
Autocomplete suggestions are a crucial feature in mobile applications, providing users with a seamless and efficient way to enter data. In Flutter, adding autocomplete suggestions to a TextField can be achieved using the Autocomplete package. In this article, we will explore how to add autocomplete suggestions on TextField in Flutter.
Understanding the Basics of Autocomplete in Flutter
To get started with autocomplete in Flutter, you need to have a basic understanding of the Autocomplete package. This package provides a simple and effective way to add autocomplete suggestions to your TextField. The package uses a list of suggestions and a callback function to filter the suggestions based on the user’s input.
Implementing Autocomplete Suggestions in Flutter
To implement autocomplete suggestions in Flutter, you need to use the `RawAutocomplete` widget. This widget takes a list of suggestions and a callback function to filter the suggestions. Here is a simple example of how to use the `RawAutocomplete` widget:
“`dart
import ‘package:flutter/material.dart’;
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
@override
MyHomePageState createState() => MyHomePageState();
}
class _MyHomePageState extends State
final List
final TextEditingController _controller = TextEditingController();
@override
Widget build(BuildContext context) {
return Scaffold(
body: RawAutocomplete(
optionsBuilder: (TextEditingValue textEditingValue) {
if (textEditingValue.text == ”) {
return [];
}
return _options.where((option) => option.contains(textEditingValue.text)).toList();
},
fieldViewBuilder: (BuildContext context, TextEditingController textEditingController, FocusNode focusNode, VoidCallback onFieldSubmitted) {
_controller = textEditingController;
return TextField(
controller: textEditingController,
focusNode: focusNode,
onSubmitted: (String value) {
onFieldSubmitted();
},
);
},
optionsViewBuilder: (BuildContext context, AutocompleteOnSelected
return Align(
alignment: Alignment.topLeft,
child: Material(
elevation: 4.0,
child: SizedBox(
width: 200,
child: ListView(
shrinkWrap: true,
children: options.map((option) {
return GestureDetector(
onTap: () {
onSelected(option);
},
child: ListTile(
title: Text(option),
),
);
}).toList(),
),
),
),
);
},
onSelected: (String selection) {
_controller.text = selection;
},
),
);
}
}
“`
Benefits of Using Autocomplete Suggestions in Flutter
Using autocomplete suggestions in Flutter provides several benefits, including:
- Improved user experience: Autocomplete suggestions help users enter data quickly and accurately.
- Reduced errors: Autocomplete suggestions reduce the likelihood of errors caused by typos or incorrect data entry.
- Increased efficiency: Autocomplete suggestions save users time and effort by providing a list of possible options.
Common Use Cases for Autocomplete Suggestions in Flutter
Autocomplete suggestions are commonly used in a variety of scenarios, including:
- Search bars: Autocomplete suggestions are often used in search bars to provide users with a list of possible search terms.
- Form fields: Autocomplete suggestions can be used in form fields to help users enter data quickly and accurately.
- Text fields: Autocomplete suggestions can be used in text fields to provide users with a list of possible options.
Conclusion
In conclusion, adding autocomplete suggestions to a TextField in Flutter is a simple and effective way to improve the user experience. By using the `RawAutocomplete` widget and providing a list of suggestions, you can help users enter data quickly and accurately. With the benefits and common use cases outlined above, you can see why autocomplete suggestions are a crucial feature in many mobile applications.
Frequently Asked Questions
1. What is the purpose of the Autocomplete package in Flutter?
The Autocomplete package in Flutter provides a simple and effective way to add autocomplete suggestions to a TextField.
2. How do I implement autocomplete suggestions in Flutter?
To implement autocomplete suggestions in Flutter, you can use the `RawAutocomplete` widget and provide a list of suggestions.
3. What are the benefits of using autocomplete suggestions in Flutter?
Using autocomplete suggestions in Flutter provides several benefits, including improved user experience, reduced errors, and increased efficiency.
4. Can I customize the appearance of autocomplete suggestions in Flutter?
Yes, you can customize the appearance of autocomplete suggestions in Flutter by using the `optionsViewBuilder` property of the `RawAutocomplete` widget.
5. Are autocomplete suggestions in Flutter compatible with all devices?
Yes, autocomplete suggestions in Flutter are compatible with all devices, including Android and iOS devices.
