text_input_mask_formatter 0.0.3

Class that extends TextInputFormatter and makes pure dart masking in flutter simpler!

example/main.dart

import 'package:flutter/material.dart';
import 'package:text_input_mask_formatter/text_input_mask_formatter.dart';
import 'package:flutter/services.dart';

class App extends StatefulWidget {
  AppState createState() => new AppState();
}

class AppState extends State<App> {
  final maskFormatter = MaskTextInputFormatter('+1 (___) ___-__-__');

  String inputValue = '';
  String unmaskedInputValue = '';
  _onTextChange(String s) {
    setState(() {
      inputValue = s;
      unmaskedInputValue = maskFormatter.getEscapedString(s);
    });
  }

  @override
  Widget build(BuildContext context) => 
    MaterialApp(
      title: 'Flutter masked input',
      home: Scaffold(
        body: TextField(
          onChanged: _onTextChange,
          inputFormatters: [
            WhitelistingTextInputFormatter.digitsOnly,
            maskFormatter
          ],
            decoration: InputDecoration(
              hintText: '+1 (___) ___-__-__'
            ),
          )
    ));
}