如何在Flutter中更新keyboardType (在应用中)？

import 'package:flutter/material.dart';

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  TextEditingController _textEditingController = TextEditingController();
  TextInputType _currentKeyboardType = TextInputType.text;

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

  void updateKeyboardType(TextInputType keyboardType) {
    setState(() {
      _currentKeyboardType = keyboardType;
    });
  }
}