This code defines a Flutter widget called CountryPicker that lets users select a country from a dropdown list. Here's a breakdown: CountryPicker widget: Takes an optional selectedCountry (the initial selected country) and an onChanged callback that's triggered when the selection changes. _loadCountries function: Reads a JSON file (assets/countries.json) containing country data and populates the countries list with the loaded data. build method: Creates a DropdownButton widget. The dropdown's items are generated from the countries list, showing each country's name. The dropdown's value is set to widget.selectedCountry and the onChanged callback is used to update the state and call the provided onChanged function. In essence, this code provides a simple yet effective way to implement a country picker in your Flutter application.

Features

  1. Easy Integration: Effortless setup: Simply import the package and use the CountryPicker widget to create a dropdown list. Customize appearance: Style the dropdown using standard Flutter widgets and theme settings.
  2. Comprehensive Country Data: Extensive database: Includes data for all countries worldwide, ensuring wide coverage. JSON-based: The country data is stored in a JSON file, making it easy to update and customize.
  3. User-Friendly Interface: Dropdown list: Provides a familiar and intuitive way to select a country. Clear display: Shows country names clearly in the dropdown list.
  4. Customizable Functionality: Initial Selection: Set a default country using the selectedCountry parameter. On-change Callback: Execute custom logic when the selected country changes using the onChanged callback.

Getting started

Prerequisites: Flutter: Ensure you have Flutter installed and set up on your system. https://flutter.dev/docs/get-started/install Dart: Flutter uses the Dart programming language, so familiarity with Dart is recommended. Steps:

  1. Add the package to your project: Open your pubspec.yaml file in your Flutter project. Add the following line under the dependencies section: country_picker: ^latest_version

  2. Run flutter pub get in your terminal to install the package. Import the package: In your Dart code file, import the country_picker package: import 'package:country_picker/country_picker.dart';

  3. Use the CountryPicker widget: Create a CountryPicker widget in your UI: CountryPicker( selectedCountry: 'United States', onChanged: (String? newValue) { print('Selected Country: $newValue'); }, ),

Usage

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

class MyWidget extends StatefulWidget { @override _MyWidgetState createState() => _MyWidgetState(); }

class _MyWidgetState extends State

@override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Basic Country Selection'), ), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: 

const like = 'sample';

Additional information

This package is typically released under an open-source license, which grants users the freedom to use, modify, and distribute the code. Check the LICENSE file in the repository for specific details.

Libraries

country_picker