country_selector 1.0.2+4

A flutter widget, You can use it to get region code and this widget allows you to filter the country code items by app bar search or the right side index bar.

example/lib/main.dart

import 'package:country_selector/aris_country_localizations.dart';
import 'package:country_selector/constants/country_codes.dart';
import 'package:country_selector/country_selector.dart';
import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Country Selector Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      supportedLocales: [
        Locale('zh', 'CN'),
        Locale('en', 'US'),
      ],
      locale: defaultLocale,
      localizationsDelegates: [
        ArisCountryLocalizations.delegate,
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
      ],
      builder: (BuildContext context, Widget child) {
        /// make font size not affected by system font setting
        /// https://www.kikt.top/posts/flutter/layout/dynamic-text/
        return MediaQuery(
          data: MediaQuery.of(context).copyWith(textScaleFactor: 1.0),
          child: child,
        );
      },
      home: MyHomePage(title: 'Country Selector Demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text(widget.title),
        ),
        body: Padding(
          padding: EdgeInsets.symmetric(horizontal: 12.0, vertical: 16.0),
          child: ArisCountrySelector(
            listPageTitle: 'Select Country and Region',
            titleCentered: true,
            // enableBackToTop: false,
            floatingButtonStyle: TextStyle(
              fontSize: 32.0,
              // color: Colors.yellow,
            ),
            listPageCancelButtonText: 'Cancel',
            listPageSearchHint: 'Search',
            initialSelection: 'US',
            listPageAppBarTheme: AppBarTheme(
                color: Colors.blue,
                iconTheme: IconThemeData(
                  color: Colors.white,
                ),
                textTheme: TextTheme(
                    headline5: TextStyle(
                      color: Colors.white,
                    ),
                    headline6: TextStyle(
                      color: Colors.white,
                    ),
                    button: TextStyle(
                      color: Colors.white,
                    ))),
            listPageTextTheme: TextTheme(),
            listPageIndexBarTheme: TextTheme(),
            onSelected: (params) {
              print(params.toString());
              // if you want to assign it to other variable, wrap it in below code
              // WidgetsBinding.instance.addPostFrameCallback((_) {
              //   setState(() {
              //     this.variable = params;
              //   });
              // });
            },
            // use country short code or dial code
            favorite: ['86', 'HK', 'MO', 'TW'],
          ),
        ));
  }
}