main.dart

import 'package:flutter/material.dart';
import 'package:flutter_form_builder/flutter_form_builder.dart';
import 'package:form_builder_phone_field/form_builder_phone_field.dart';
import 'package:form_builder_validators/form_builder_validators.dart';
import 'package:flutter_localizations/flutter_localizations.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      // Locale config required by form_builder_validators
      // https://github.com/danvick/flutter_form_builder/blob/master/packages/form_builder_validators/example/lib/main.dart
      supportedLocales: const [...FormBuilderLocalizations.supportedLocales],
      localizationsDelegates: const [
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
        GlobalCupertinoLocalizations.delegate,
        FormBuilderLocalizations.delegate,
      ],
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  final _formKey = GlobalKey<FormBuilderState>();

  MyHomePage({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text("FormBuilderPhoneField")),
      body: FormBuilder(
        key: _formKey,
        child: Padding(
          padding: const EdgeInsets.all(8.0),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              FormBuilderPhoneField(
                name: 'phone_number',
                decoration: const InputDecoration(
                  labelText: 'Phone Number',
                  hintText: 'Hint',
                ),
                // onChanged: _onChanged,
                priorityListByIsoCode: const ['KE'],
                validator: FormBuilderValidators.compose([
                  FormBuilderValidators.numeric(),
                  FormBuilderValidators.required(),
                ]),
              ),
              const SizedBox(height: 15),
              FormBuilderPhoneField(
                name: 'phone_number_cupertino',
                isCupertinoPicker: true,
                decoration: const InputDecoration(
                  labelText: 'Phone Number',
                  hintText: 'Hint',
                ),
                // onChanged: _onChanged,
                priorityListByIsoCode: const ['US'],
                validator: FormBuilderValidators.compose([
                  FormBuilderValidators.numeric(),
                  FormBuilderValidators.required(),
                ]),
              ),
              const SizedBox(height: 15),
              Wrap(
                spacing: 16,
                children: [
                  ElevatedButton(
                    onPressed: () {
                      if (_formKey.currentState!.saveAndValidate()) {
                        debugPrint(_formKey.currentState!.value.toString());
                      }
                    },
                    child: const Text("Submit"),
                  ),
                  ElevatedButton(
                    onPressed: () {
                      _formKey.currentState?.reset();
                      debugPrint(
                          _formKey.currentState!.instantValue.toString());
                    },
                    child: const Text("Reset"),
                  )
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }
}