如何在flutter中将文本字段的文本绑定到简单的文本标签

import 'package:flutter/material.dart';

class TextFieldExample extends StatefulWidget {
  @override
  _TextFieldExampleState createState() => _TextFieldExampleState();
}

class _TextFieldExampleState extends State<TextFieldExample> {
  TextEditingController _textEditingController = TextEditingController();
  String _displayText = '';

  @override
  void dispose() {
    _textEditingController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('TextField Example'),
      ),
      body: Column(
        children: [
          TextField(
            controller: _textEditingController,
            onChanged: (text) {
              setState(() {
                _displayText = text;
              });
            },
          ),
          SizedBox(height: 10),
          Text('Display Text: $_displayText'),
        ],
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: TextFieldExample(),
  ));
}