键盘打开或关闭时重新加载Flutter页面

import 'package:flutter/material.dart';

class MyPage extends StatefulWidget {
  @override
  _MyPageState createState() => _MyPageState();
}

class _MyPageState extends State<MyPage> with WidgetsBindingObserver {
  bool _isKeyboardOpen = false;

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();
  }

  @override
  void didChangeMetrics() {
    final bool isKeyboardOpen = MediaQuery.of(context).viewInsets.bottom > 0;
    if (_isKeyboardOpen != isKeyboardOpen) {
      setState(() {
        _isKeyboardOpen = isKeyboardOpen;
      });
      // 执行重新加载页面的操作
      reloadPage();
    }
  }

  void reloadPage() {
    // 在这里执行重新加载页面的逻辑
    // 可以使用Navigator.pushReplacement来重新加载当前页面
    Navigator.pushReplacement(
      context,
      MaterialPageRoute(builder: (context) => MyPage()),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('My Page'),
      ),
      body: Center(
        child: Text('Keyboard is ${_isKeyboardOpen ? 'open' : 'closed'}'),
      ),
    );
  }
}