A customized Flutter TextFormField to input an international Mobile number along with the country code.
intl_mobile_field is a powerful and flexible Flutter package designed to handle international phone number input easily. It offers advanced features, improved compatibility, and enhanced customization options to meet modern development needs. Visit the Changelog to stay updated on the latest additions and improvements.
Installing
To use this package:
Run this command:
flutter pub add intl_mobile_field
Or, add the following to your pubspec.yaml file under dependencies:
intl_mobile_field: ^2.1.4
Sometimes you may want to use the latest version of the package, instead of a published version. To do that, use the git syntax:
dependencies:
intl_mobile_field:
git:
url: https://github.com/MdAshrafUllah/intl_mobile_field.git
ref: master
How to Use
import the url
import 'package:intl_mobile_field/intl_mobile_field.dart';
For FlagsDropDown you have to import.
import 'package:intl_mobile_field/flags_drop_down.dart';
Simply create a IntlMobileField widget, and pass the required params:
Example: 1 (without favorite)
IntlMobileField(
initialCountryCode: 'BD', // initial Country is Bangladesh
languageCode: "en", // initial language is English
decoration: const InputDecoration(
labelText: 'Mobile Number',
border: OutlineInputBorder(
borderSide: BorderSide(),
),
),
disableLengthCounter: true,
),
output

Example: 2 (with favorite - style one)
IntlMobileField(
favorite: const ['BD', 'US', 'MY'],
favoriteIcon: Icon(
Icons.star,
color: Colors.amber,
),
favoriteIconPosition: Position.trailing,
favoriteCountryCodePosition: Position.trailing,
initialCountryCode: 'BD',
languageCode: "en", // default is 'en'
onCountryChanged: (country) {
log('Country changed to: ${country.name}');
},
decoration: const InputDecoration(
labelText: 'Mobile Number',
border: OutlineInputBorder(
borderSide: BorderSide(),
),
),
disableLengthCounter: true,
onChanged: (mobile) {
log(mobile.completeNumber);
},
),
output

Example: 3 (with favorite - style two)
IntlMobileField(
favorite: const ['BD', 'US', 'MY'],
favoriteIcon: Icon(
Icons.favorite,
color: Colors.pinkAccent,
),
favoriteIconPosition: Position.trailing,
initialCountryCode: 'BD',
languageCode: "en", // default is 'en'
onCountryChanged: (country) {
log('Country changed to: ${country.name}');
},
decoration: const InputDecoration(
labelText: 'Mobile Number',
border: OutlineInputBorder(
borderSide: BorderSide(),
),
),
disableLengthCounter: true,
onChanged: (mobile) {
log(mobile.completeNumber);
},
),
output

Use initialCountryCode to set an initial Country Code.
For PickerDialogStyle you have to import.
import 'package:intl_mobile_field/country_picker_dialog.dart';
Example 4 (FlagDropDown)
FlagsDropDown(
countryCodeDisable: true,
onCountryChanged: (country) {
debugPrint('Country changed to: ${country.name}');
},
flagWidth: 150,
),
Output

Example 5 (FlagImage)
FlagImage(
countryCode: 'BD',
width: 150,
height: 150,
),
Output
Example 6 (Validation Message)
When you want to show a invalid Number message you can pass it through invalidNumberMessage
IntlMobileField(
decoration: InputDecoration(
labelText: "Mobile Number",
border: OutlineInputBorder(),
),
invalidNumberMessage: "Enter a Valid Number",
),
Output
Example 7 (Custom Validation)
you can add your own validation message.
IntlMobileField(
initialCountryCode: "BD",
decoration: InputDecoration(
labelText: "Mobile Number",
border: OutlineInputBorder(),
),
invalidNumberMessage:
"Enter a Valid Number", // fallback error message
validator: (mobileNumber) {
if (mobileNumber == null || mobileNumber.number.isEmpty) {
return 'Please enter a mobile number';
}
if (!RegExp(r'^[0-9]+$').hasMatch(mobileNumber.number)) {
return 'Only digits are allowed';
}
return null;
},
),
Output

Example 8 (Custom Country List)
You can limit the country List. Otherwise, it shows all countries by default.
IntlMobileField(
initialCountryCode: "BD",
decoration: InputDecoration(
labelText: "Mobile Number",
border: OutlineInputBorder(),
),
countries: ['BD', 'MY', 'US', 'AE', 'UK', 'NL'], // ['880', '60', '971'],
),
Output

RTL Support
If you select languageCode Arabic, Urdu, Persian, or Cantonese (Chinese), the flag will automatically be on the right, and the country code will automatically be on the left. You can also turn off RLT Support by adding rltSupport: false.
output
| LRT Languages | RLT Language |
|---|---|
![]() |
![]() |
Supported Languages
We support more than 26 languages, including:
| No | Code | Language | No | Code | Language |
|---|---|---|---|---|---|
| 01 | hu | Hungarian | 15 | ar | Arabic |
| 02 | sk | Slovak | 16 | fa | Persian |
| 03 | se | Swedish | 17 | yue | Cantonese (Chinese) |
| 04 | pl | Polish | 18 | bd | Bangla (Bangladesh) |
| 05 | no | Norwegian | 19 | in | Hindi (India) |
| 06 | ja | Japanese | 20 | ur | Urdu (Pakistan) |
| 07 | it | Italian | 21 | pt_br | Brazilian Portuguese |
| 08 | zh | Simplified Chinese | 22 | sr_cyrl | Serbian (Cyrillic) |
| 09 | nl | Dutch | 23 | sr_latn | Serbian (Latin) |
| 10 | de | German | 24 | zh_tw | Traditional Chinese |
| 11 | fr | French | 25 | tr | Turkish |
| 12 | es | Spanish | 26 | ro | Romanian |
| 13 | en | English | 27 | pt | Portuguese |
| 14 | vi | Vietnamese |
Enjoy multilingual support with easy-to-read formatting!
Contributing
Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
Please make sure to update tests as appropriate.
Comment on Issue or Pull Request.
Maintainers
LICENSE
This project is licensed under the MIT license. See LICENSE for more information.

