import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(

        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Hint Text Direction'),
    );
  }
}

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: Directionality(
        textDirection: TextDirection.rtl,
        child: Padding(
          padding: const EdgeInsets.all(8.0),
          child: Column(
            children: <Widget>[
              TextFormField(
                textDirection: TextDirection.ltr,
                decoration: InputDecoration(
                  border: OutlineInputBorder(),
                  labelText: 'آدرس ایمیل',
                  hintText: '[email protected]',
                ),
              ),
              SizedBox(height: 8),
              TextFormField(
                textDirection: TextDirection.ltr,
                decoration: InputDecoration(
                    border: OutlineInputBorder(),
                    labelText: 'آدرس ایمیل',
                    hintText: '[email protected]',
                    hintTextDirection: TextDirection.ltr),
              ),
            ],
          ),
        ),
      ),
    );
  }
}