Flutter资源动态更改插件change_res的使用

Flutter资源动态更改插件change_res的使用

描述

change_res 插件允许在运行时动态更改 Windows 应用程序的分辨率。

完整示例代码

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

import 'package:flutter/services.dart';
import 'package:change_res/change_res.dart';

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

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

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = '未知';
  final _changeResPlugin = ChangeRes();
  int width = 0;
  int high = 0;

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

  // 异步方法用于初始化平台状态
  Future<void> initPlatformState() async {
    String platformVersion;
    // 使用 try/catch 处理可能发生的 PlatformException
    try {
      platformVersion = await _changeResPlugin.changeReslutionScreen() ?? 
                        '未知平台版本';
      width = int.parse(platformVersion.split(',,').first);
      high = int.parse(platformVersion.split(',,').last);
    } on PlatformException {
      platformVersion = '获取平台版本失败。';
    }

    // 如果小部件在异步平台消息处理过程中被移除，则丢弃回复
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        floatingActionButton: IconButton(
            onPressed: () async {
              String platformVersion = await _changeResPlugin
                      .changeReslutionScreen(high: high, width: width) ??
                  '未知平台版本';
              width = int.parse(platformVersion.split(',,').first);
              high = int.parse(platformVersion.split(',,').last);
            },
            icon: const Icon(Icons.access_alarm_sharp)),
        appBar: AppBar(
          title: const Text('插件示例应用'),
        ),
        body: Center(
          child: Text('运行于: $_platformVersion\n'),
        ),
      ),
    );
  }
}

说明

1. 导入必要的包

   import 'package:flutter/material.dart';
   import 'dart:async';
   
   import 'package:flutter/services.dart';
   import 'package:change_res/change_res.dart';
   

2. 定义主应用

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

3. 创建应用状态管理类

   class MyApp extends StatefulWidget {
     const MyApp({super.key});
   
     [@override](/user/override)
     State<MyApp> createState() => _MyAppState();
   }
   

4. 初始化平台状态

   class _MyAppState extends State<MyApp> {
     String _platformVersion = '未知';
     final _changeResPlugin = ChangeRes();
     int width = 0;
     int high = 0;
   
     [@override](/user/override)
     void initState() {
       super.initState();
       initPlatformState();
     }
   
     Future<void> initPlatformState() async {
       String platformVersion;
       try {
         platformVersion = await _changeResPlugin.changeReslutionScreen() ?? 
                           '未知平台版本';
         width = int.parse(platformVersion.split(',,').first);
         high = int.parse(platformVersion.split(',,').last);
       } on PlatformException {
         platformVersion = '获取平台版本失败。';
       }
   
       if (!mounted) return;
   
       setState(() {
         _platformVersion = platformVersion;
       });
     }
   

   • initPlatformState 方法用于初始化平台状态并获取当前分辨率。
   • changeReslutionScreen 方法用于设置新的分辨率。

5. 构建用户界面

   [@override](/user/override)
   Widget build(BuildContext context) {
     return MaterialApp(
       home: Scaffold(
         floatingActionButton: IconButton(
             onPressed: () async {
               String platformVersion = await _changeResPlugin
                       .changeReslutionScreen(high: high, width: width) ??
                   '未知平台版本';
               width = int.parse(platformVersion.split(',,').first);
               high = int.parse(platformVersion.split(',,').last);
             },
             icon: const Icon(Icons.access_alarm_sharp)),
         appBar: AppBar(
           title: const Text('插件示例应用'),
         ),
         body: Center(
           child: Text('运行于: $_platformVersion\n'),
         ),
       ),
     );
   }