flutter 调出键盘和监听输入

调出键盘:

dart 复制代码
  void callKeyboard() {
    SystemChannels.textInput.invokeMethod<void>('TextInput.show');
  }

监听按键:

dart 复制代码
RawKeyboardListener(
                autofocus: true,
                onKey: (event) {
                  if (event.runtimeType == RawKeyDownEvent) {
                    if(event.data is RawKeyEventDataAndroid){
                      RawKeyEventDataAndroid datga = event.data as RawKeyEventDataAndroid;
                      ///获取按键键值 keycode
                      // _value = datga.keyCode.toString();
                      print('flutter down: '+datga.keyCode.toString());
                    }
                  }
                },
                focusNode: FocusNode(),
                child:  Text(""),
              )

完整代码

dart 复制代码
import 'package:flutter/material.dart';

import 'package:flutter/services.dart';


void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  void callKeyboard() {
    SystemChannels.textInput.invokeMethod<void>('TextInput.show');
  }

  @override
  Widget build(BuildContext context) {


    const title = 'Horizontal List';

    String _value = "test";

    return MaterialApp(
      title: title,
      home: Scaffold(
        appBar: AppBar(
          title: const Text(title),
        ),
        body: Container(
          margin: const EdgeInsets.symmetric(vertical: 20),
          height: 200,
          child: ListView(
            // This next line does the trick.
            scrollDirection: Axis.horizontal,
            children: <Widget>[
              Container(
                width: 160,
                color: Colors.red,
              ),
              Container(
                width: 160,
                color: Colors.blue,
              ),
              Container(
                width: 160,
                color: Colors.green,
              ),
              Container(
                width: 160,
                color: Colors.yellow,
              ),
              Container(
                width: 160,
                color: Colors.orange,
                child: OutlinedButton(
                  child: Text("normal"),
                  onPressed: callKeyboard,
                )
              ),
              RawKeyboardListener(
                autofocus: true,
                onKey: (event) {
                  if (event.runtimeType == RawKeyDownEvent) {
                    if(event.data is RawKeyEventDataAndroid){
                      RawKeyEventDataAndroid datga = event.data as RawKeyEventDataAndroid;
                      ///获取按键键值 keycode
                      // _value = datga.keyCode.toString();
                      print('flutter down: '+datga.keyCode.toString());
                    }
                  }
                },
                focusNode: FocusNode(),
                child:  Text(_value),
              )

            ],
          ),
        ),
      ),
    );
  }
}
相关推荐
掘金安东尼2 小时前
抛弃自定义模态框:原生Dialog的实力
前端·javascript·github
hj5914_前端新手6 小时前
javascript基础- 函数中 this 指向、call、apply、bind
前端·javascript
Hilaku6 小时前
都2025年了,我们还有必要为了兼容性,去写那么多polyfill吗?
前端·javascript·css
LuckySusu6 小时前
【js篇】JavaScript 原型修改 vs 重写:深入理解 constructor的指向问题
前端·javascript
LuckySusu6 小时前
【js篇】如何准确获取对象自身的属性?hasOwnProperty深度解析
前端·javascript
LuckySusu6 小时前
【js篇】深入理解 JavaScript 作用域与作用域链
前端·javascript
LuckySusu6 小时前
【js篇】call() 与 apply()深度对比
前端·javascript
LuckySusu6 小时前
【js篇】addEventListener()方法的参数和使用
前端·javascript
LuckySusu6 小时前
【js篇】深入理解 JavaScript 原型与原型链
前端·javascript
云枫晖7 小时前
手写Promise-构造函数
前端·javascript