import 'package:flutter/material.dart';
import 'package:path_provider/path_provider.dart';
import 'dart:io';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'String Input and Save',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  TextEditingController _textEditingController = TextEditingController();

  void _saveToFile() async {
    String text = _textEditingController.text;
    if (text.isNotEmpty) {
      Directory directory = await getApplicationDocumentsDirectory();
      File file = File('${directory.path}/my_text_file.txt');
      await file.writeAsString(text);
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text('Text saved to file'),
        ),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('String Input and Save'),
      ),
      body: Padding(
        padding: EdgeInsets.all(16.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            TextField(
              controller: _textEditingController,
              decoration: InputDecoration(labelText: 'Enter your text'),
            ),
            SizedBox(height: 16.0),
            ElevatedButton(
              onPressed: _saveToFile,
              child: Text('Save to File'),
            ),
          ],
        ),
      ),
    );
  }
}




dependencies:
  flutter:
    sdk: flutter
  path_provider: ^2.0.2