Easy Autocomplete

A Flutter plugin to handle input autocomplete suggestions

Preview

Table of contents

• ToDo
• Done
• Installation
• Basic example
• Example with customized style
• Example with asynchronous data fetch
• API
• Issues & Suggestions

ToDo

• Add validation functionality
• Add possibility to show empty message when no suggestion is found

Done

• Add asynchronous suggestions fetch
• Add possibility to customize suggestions list item

Installation

In the pubspec.yaml of your flutter project, add the following dependency:

dependencies:
  ...
  easy_autocomplete: ^1.6.0

Basic example

You can create a simple autocomplete input widget as shown in first preview with the following example:

import 'package:easy_autocomplete/easy_autocomplete.dart';
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: SafeArea(
        child: Scaffold(
          appBar: AppBar(
            title: Text('Example')
          ),
          body: Container(
            padding: EdgeInsets.all(10),
            alignment: Alignment.center,
            child: EasyAutocomplete(
              suggestions: ['Afeganistan', 'Albania', 'Algeria', 'Australia', 'Brazil', 'German', 'Madagascar', 'Mozambique', 'Portugal', 'Zambia'],
              onChanged: (value) => print('onChanged value: $value'),
              onSubmitted: (value) => print('onSubmitted value: $value')
            )
          )
        )
      )
    );
  }
}

Example with customized style

You can customize other aspects of the autocomplete widget such as the suggestions text style, background color and others as shown in example below:

import 'package:easy_autocomplete/easy_autocomplete.dart';
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: SafeArea(
        child: Scaffold(
          appBar: AppBar(
            title: Text('Example')
          ),
          body: Container(
            padding: EdgeInsets.all(10),
            alignment: Alignment.center,
            child: EasyAutocomplete(
              suggestions: ['Afeganistan', 'Albania', 'Algeria', 'Australia', 'Brazil', 'German', 'Madagascar', 'Mozambique', 'Portugal', 'Zambia'],
              cursorColor: Colors.purple,
              decoration: InputDecoration(
                contentPadding: EdgeInsets.symmetric(vertical: 0, horizontal: 10),
                focusedBorder: OutlineInputBorder(
                  borderRadius: BorderRadius.circular(5),
                  borderSide: BorderSide(
                    color: Colors.purple,
                    style: BorderStyle.solid
                  )
                ),
                enabledBorder: OutlineInputBorder(
                  borderRadius: BorderRadius.circular(5),
                  borderSide: BorderSide(
                    color: Colors.purple,
                    style: BorderStyle.solid
                  )
                )
              ),
              suggestionBuilder: (data) {
                return Container(
                  margin: EdgeInsets.all(1),
                  padding: EdgeInsets.all(5),
                  decoration: BoxDecoration(
                    color: Colors.purple,
                    borderRadius: BorderRadius.circular(5)
                  ),
                  child: Text(
                    data,
                    style: TextStyle(
                      color: Colors.white
                    )
                  )
                );
              }
              onChanged: (value) => print(value)
            )
          )
        )
      )
    );
  }
}

The above example will generate something like below preview:

Example with asynchronous data fetch

To create a autocomplete field that fetches data asynchronously you will need to use asyncSuggestions instead of suggestions

import 'package:easy_autocomplete/easy_autocomplete.dart';
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  Future<List<String>> _fetchSuggestions(String searchValue) async {
    await Future.delayed(Duration(milliseconds: 750));
    List<String> _suggestions = ['Afeganistan', 'Albania', 'Algeria', 'Australia', 'Brazil', 'German', 'Madagascar', 'Mozambique', 'Portugal', 'Zambia'];
    List<String> _filteredSuggestions = _suggestions.where((element) {
      return element.toLowerCase().contains(searchValue.toLowerCase());
    }).toList();
    return _filteredSuggestions;
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: SafeArea(
        child: Scaffold(
          appBar: AppBar(
            title: Text('Example')
          ),
          body: Container(
            padding: EdgeInsets.all(10),
            alignment: Alignment.center,
            child: EasyAutocomplete(
              asyncSuggestions: (searchValue) async => _fetchSuggestions(searchValue),
              onChanged: (value) => print(value)
            )
          )
        )
      )
    );
  }
}

The above example will generate something like below preview:

API

Attribute	Type	Required	Description	Default value
suggestions	List<String>	:x:	The list of suggestions to be displayed
asyncSuggestions	Future<List<String>> Function(String)	:x:	Fetches list of suggestions from a Future
controller	TextEditingController	:x:	Text editing controller
validator	String Function(String?)	:x:	Validate the autocomplete field value
decoration	InputDecoration	:x:	Can be used to decorate the input
onChanged	Function(String)	:x:	Function that handles the changes to the input
inputFormatter	List<TextInputFormatter>	:x:	Can be used to set custom inputFormatters to field
initialValue	String	:x:	Can be used to set the textfield initial value
textCapitalization	TextCapitalization	:x:	Can be used to set the text capitalization type	TextCapitalization.sentences
autofocus	bool	:x:	Determines if should gain focus on screen open	false
focusNode	FocusNode	:x:	Can be used to manage TextField focus
keyboardType	TextInputType	:x:	Can be used to set different keyboardTypes to your field	TextInputType.text
cursorColor	Color	:x:	Can be used to set a custom color to the input cursor	Colors.blue
inputTextStyle	TextStyle	:x:	Can be used to set custom style to the suggestions textfield
suggestionTextStyle	TextStyle	:x:	Can be used to set custom style to the suggestions list text
suggestionBackgroundColor	Color	:x:	Can be used to set custom background color to suggestions list
debounceDuration	Duration	:x:	Used to set the debounce time for async data fetch	Duration(milliseconds: 400)
suggestionBuilder	Widget Function(String)	:x:	Can be used to customize suggestion items
progressIndicatorBuilder	Widget	:x:	Can be used to display custom progress idnicator

Issues & Suggestions

If you encounter any issue you or want to leave a suggestion you can do it by filling an issue.

Contributions

Here's the list of our awesome contributors:

• Prateek Sunal
• Miklos Zsido

Thank you for the support!

Libraries

easy_autocomplete

widgets/filterable_list