如何在TextField中为"value“添加两个函数？

import 'package:flutter/material.dart';

class MyTextField extends StatefulWidget {
  @override
  _MyTextFieldState createState() => _MyTextFieldState();
}

class _MyTextFieldState extends State<MyTextField> {
  TextEditingController _controller;

  @override
  void initState() {
    super.initState();
    _controller = TextEditingController();
    _controller.addListener(_onValueChanged);
  }

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

  void _onValueChanged() {
    // 第一个函数
    print('Value changed: ${_controller.text}');

    // 第二个函数
    _doSomething();
  }

  void _doSomething() {
    // 在这里执行你想要的操作
    print('Do something with the value');
  }

  @override
  Widget build(BuildContext context) {
    return TextField(
      controller: _controller,
    );
  }
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('My App'),
        ),
        body: Center(
          child: MyTextField(),
        ),
      ),
    );
  }
}