phone_form_field

Flutter phone input integrated with flutter internationalization

Features

Totally cross platform, this is a dart only package / dependencies
Internationalization: many languages supported
Semantics
Phone formatting localized by region
Phone number validation (built-in validators included for main use cases)
Support auto fill and copy paste
Uses dart phone_numbers_parser for parsing
Form field

Demo

Demo available at https://cedvdb.github.io/phone_form_field/

Usage

PhoneFormField();

/// params
PhoneFormField(
  initialValue: PhoneNumber.parse('+33'), // or use the controller
  validator: PhoneValidator.compose(
      [PhoneValidator.required(), PhoneValidator.validMobile()]),
  countrySelectorNavigator: const CountrySelectorNavigator.page(),
  onChanged: (phoneNumber) => print('changed into $phoneNumber'),
  enabled: true,
  isCountrySelectionEnabled: true,
  isCountryButtonPersistent: true,
  countryButtonStyle: const CountryButtonStyle(
    showDialCode: true,
    showIsoCode: true,
    showFlag: true,
    flagSize: 16
  ),

  // + all parameters of TextField
  // + all parameters of FormField
  // ...
);

Validation

Built-in validators

required : PhoneValidator.required
valid : PhoneValidator.valid (default value when no validator supplied)
valid mobile number : PhoneValidator.validMobile
valid fixed line number : PhoneValidator.validFixedLine
valid type : PhoneValidator.validType
valid country : PhoneValidator.validCountry
none : PhoneValidator.none (this can be used to disable default valid validator)

Validators details

Each validator has an optional errorText property to override built-in translated text

Composing validators

Validator can be a composed set of validators built-in or custom validator using PhoneValidator.compose, see example below.

Note that when composing validators, the sorting is important as the error message displayed is the first validator failing.

PhoneFormField(
  // ...
  validator: PhoneValidator.compose([
    // list of validators to use
    PhoneValidator.required(errorText: "You must enter a value"),
    PhoneValidator.validMobile(),
    // ..
  ]),
)

Country selector

Here are the list of the parameters available for all built-in country selector :

Name	Default value	Description
countries	null	Countries available in list view (all countries are listed when omitted)
favorites	null	List of country code `['FR','UK']` to display on top of the list
addSeparator	true	Whether to add a separator between favorite countries and others one. Useless if `favorites` parameter is null
showCountryCode	true	Whether to display the country dial code as listTile item subtitle
sortCountries	false	Whether the countries should appear in alphabetic order, if false the countries are displayed in the same order as `countries` property (Note that favorite countries are listed in supplied order whatever the value of this parameter)
noResultMessage	null	The message to be displayed in place of the list when search result is empty (a default localised message is used when omitted)

Built-in country selector

CountrySelectorNavigator.page Open a page to select the country. No extra parameters
CountrySelectorNavigator.dialog Open a dialog to select the country. No extra parameters
CountrySelectorNavigator.bottomSheet Open a bottom sheet expanding to all available space in both axis No extra parameters
CountrySelectorNavigator.modalBottomSheet Open a modal bottom sheet expanded horizontally Extra parameters:
- height (double, default null) Allow to determine the height of the bottom sheet, will expand to all available height when omitted
CountrySelectorNavigator.draggableBottomSheet Open a modal bottom sheet expanded horizontally which may be dragged from a minimum to a maximum of current available height. Uses internally the DraggableScrollableSheet flutter widget Extra parameters:
- initialChildSize (double, default: 0.5) factor of current available height used when opening
- minChildSize (double, default: 0.Z5) : maximum factor of current available height
- minChildSize (double, default: 0.Z5) : minimum factor of current available height
- borderRadius (BorderRadiusGeometry, default: 16px circular radius on top left/right)

Custom Country Selector Navigator

You can use your own country selector by creating a class that implements CountrySelectorNavigator It has one required method show expected to return the selected country:

class CustomCountrySelectorNavigator implements CountrySelectorNavigator {
  Future<Country?> show(BuildContext context) {
    // ask user for a country and return related `Country` class
  }
}

// usage
PhoneFormField(
  // ...
  selectorNavigator: CustomCountrySelectorNavigator(),
  // ...
)

Internationalization

Dynamic localization

This package uses the flutter_country_selector package under the hood, which exports a method for dynamic localization CountrySelectorLocalization.of(context).countryName(isoCode).

Setup

Include the delegate

  return MaterialApp(
    localizationsDelegates: [
      DefaultMaterialLocalizations.delegate,
      ...PhoneFieldLocalization.delegates, 
    ], 
      supportedLocales: [ 
      const Locale('en', ''), 
      const Locale('es', ''), 
      const Locale('fr', ''), 
      const Locale('ru', ''), 
      const Locale('uz', ''), 
      const Locale('uk', ''), 
      // ... 
    ],

That's it.

Supported languages

If one of the language you target is not supported you can submit a pull request in flutter_country_selector and phone_form_field repositories.

Overwriting or adding custom flags

Some users have expressed their need to change some flags due to political reasons, or stylistic reasons. You might also wish to add your own flags. To do so refer to this issue: https://github.com/cedvdb/phone_form_field/issues/222