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How to Create Checkbox in Flutter

How to Create Checkbox in Flutter?

Aman Jain, September 12, 2022March 16, 2024

In this tutorial we will learn to create checkbox in flutter application. Checkbox is used to provide multiple options to users and they can select multiple value for same input. Usage of checkbox input can be for remember me, check terms and condition, multiple answers questions choices and etc.

Flutter providers most of the widgets and input like checkbox, text field, password, textarea and in this article we will create the simple checkbox with check and uncheck values.

You can simple create checkbox as follow

Checkbox(
      value: rememberMe,
      onChanged:(bool newValue){
        setState((){
        rememberMe=newValue;
        });
      }
);

Checkbox with label in flutter

In flutter we can also create checkbox with label using the CheckboxListTile widget. CheckboxListTile accepts title in which we can define the text of label as follow

 CheckboxListTile(
    title: Text("title text"),  
    value: checkedValue,
    onChanged: (newValue) { ... },
  )

Let’s understand create checkbox in Flutter Application with an example

Step 1 : Create flutter project

Very first step is to create the fluter application using command line tool or in Android studio.

flutter create example_app

This will create a new project with name my_app then go in to the folder .

Step 2 : Create a simple widget

Now, Create a simple statefull widget to create the checkbox

File : lib/checkboxexample.dart


class CheckBoxExample extends StatefulWidget {
  const CheckBoxExample({Key? key}) : super(key: key);

  @override
  State<CheckBoxExample> createState() => _CheckBoxExampleState();
}

class _CheckBoxExampleState extends State<CheckBoxExample> {
  bool checkedValue=false;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Checkbox Example '),
      ),
      body:Center(
        child: Checkbox(
          value: checkedValue,
          activeColor: Colors.greenAccent,
          checkColor: Colors.black,


          onChanged: (bool ?value){
            setState(() {
              checkedValue=value!;
            });
          },

        ),
      ),
    );
  }
}

Step 3: Import and use the widget in main

We just created a new widget with name CheckBoxExample, now we are going to use it in our main.dart file as below

import 'package:flutter/material.dart'; 
import 'package:example_app/checkboxexample.dart';;

void main() {
  runApp(const AppRouter());
}

class AppRouter extends StatelessWidget {
  const AppRouter({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
        debugShowCheckedModeBanner: false,
        title: 'Remove Banner',
        home:  CheckBoxExample()
    );

  }
}

Step 4 : Update main.dart file

Now, open the main.dart file and add the debugShowCheckedModeBanner with value false to Material App

File : lib/main.dart

import 'package:example_app/assetimagedemo.dart';
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,  // <-- add this
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const  Container(child:Text("Test")),
    );
  }
}

Step 5: Run the project

Simply run the project using command line or in android studio to check the implementation.

flutter run lib/main.dart

Screenshot :

checkbox example flutter
checkbox example flutter

Read Also : How to create routing in flutter and pass parameters to routes ?

Related

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Aman Jain
Aman Jain

With years of hands-on experience in the realm of web and mobile development, they have honed their skills in various technologies, including Laravel, PHP CodeIgniter, mobile app development, web app development, Flutter, React, JavaScript, Angular, Devops and so much more. Their proficiency extends to building robust REST APIs, AWS Code scaling, and optimization, ensuring that your applications run seamlessly on the cloud.

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