Flutter键盘可见性检测插件flutter_keyboard_visibility_windows的使用

Flutter键盘可见性检测插件flutter_keyboard_visibility_windows的使用

简介

flutter_keyboard_visibility_windows 是一个用于在Windows平台上检测键盘可见性的Flutter插件。该插件目前只是返回假值以表示键盘是否可见。未来的目标是能够检测虚拟键盘。

使用步骤

以下是使用 flutter_keyboard_visibility_windows 插件的基本步骤和示例代码：

步骤1: 添加依赖

首先，在你的 pubspec.yaml 文件中添加插件依赖：

dependencies:
  flutter:
    sdk: flutter
  flutter_keyboard_visibility: ^5.0.0

然后运行 flutter pub get 来安装依赖。

步骤2: 初始化键盘可见性监听器

在你的Flutter应用中初始化键盘可见性监听器。以下是一个简单的示例代码：

import 'package:flutter/material.dart';
import 'package:flutter_keyboard_visibility/flutter_keyboard_visibility.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  [@override](/user/override)
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  bool _isKeyboardVisible = false;

  [@override](/user/override)
  void initState() {
    super.initState();

    // 初始化键盘可见性监听器
    final keyboardVisibilityController = KeyboardVisibilityController();

    // 监听键盘状态变化
    keyboardVisibilityController.onChange.listen((bool visible) {
      setState(() {
        _isKeyboardVisible = visible;
      });
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('键盘可见性检测'),
        ),
        body: Center(
          child: Text(
            _isKeyboardVisible ? '键盘可见' : '键盘不可见',
            style: TextStyle(fontSize: 20),
          ),
        ),
      ),
    );
  }
}

步骤3: 显示键盘可见性状态

在上述代码中，我们通过 Text 小部件显示当前键盘是否可见的状态。每当键盘状态发生变化时，onChange 监听器会触发并更新 _isKeyboardVisible 的值。

完整示例

完整的示例代码如下：

import 'package:flutter/material.dart';
import 'package:flutter_keyboard_visibility/flutter_keyboard_visibility.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  [@override](/user/override)
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  bool _isKeyboardVisible = false;

  [@override](/user/override)
  void initState() {
    super.initState();

    // 初始化键盘可见性监听器
    final keyboardVisibilityController = KeyboardVisibilityController();

    // 监听键盘状态变化
    keyboardVisibilityController.onChange.listen((bool visible) {
      setState(() {
        _isKeyboardVisible = visible;
      });
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('键盘可见性检测'),
        ),
        body: Center(
          child: Text(
            _isKeyboardVisible ? '键盘可见' : '键盘不可见',
            style: TextStyle(fontSize: 20),
          ),
        ),
      ),
    );
  }
}