Flutter:是否有可能将按钮值发送到文本字段？

import 'package:flutter/material.dart';

class ButtonTextField extends StatefulWidget {
  @override
  _ButtonTextFieldState createState() => _ButtonTextFieldState();
}

class _ButtonTextFieldState extends State<ButtonTextField> {
  String buttonText = '';
  TextEditingController textEditingController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        RaisedButton(
          child: Text('按钮'),
          onPressed: () {
            setState(() {
              buttonText = '按钮被点击了';
              textEditingController.text = buttonText;
            });
          },
        ),
        TextField(
          controller: textEditingController,
          decoration: InputDecoration(
            labelText: '文本字段',
          ),
        ),
      ],
    );
  }
}

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: Scaffold(
        appBar: AppBar(
          title: Text('Flutter按钮和文本字段示例'),
        ),
        body: Center(
          child: ButtonTextField(),
        ),
      ),
    );
  }
}