sys_info 是一个用于在 Flutter 应用中获取系统信息的插件。它可以帮助你获取设备的硬件和操作系统相关信息，例如 CPU 信息、内存信息、磁盘信息等。以下是使用 sys_info 插件的基本步骤和示例代码。

1. 添加依赖

首先，在你的 pubspec.yaml 文件中添加 sys_info 插件的依赖：

dependencies:
  flutter:
    sdk: flutter
  sys_info: ^2.0.0  # 请检查最新版本

然后运行 flutter pub get 来安装依赖。

2. 导入包

在你的 Dart 文件中导入 sys_info 包：

import 'package:sys_info/sys_info.dart';

3. 获取系统信息

你可以使用 SysInfo 类提供的各种方法来获取系统信息。以下是一些常见的使用示例：

获取 CPU 信息

void getCpuInfo() async {
  String processorName = await SysInfo.processorName;
  int numberOfCores = await SysInfo.numberOfCores;
  print('Processor Name: $processorName');
  print('Number of Cores: $numberOfCores');
}

获取内存信息

void getMemoryInfo() async {
  int totalPhysicalMemory = await SysInfo.getTotalPhysicalMemory();
  int freePhysicalMemory = await SysInfo.getFreePhysicalMemory();
  print('Total Physical Memory: $totalPhysicalMemory bytes');
  print('Free Physical Memory: $freePhysicalMemory bytes');
}

获取磁盘信息

void getDiskInfo() async {
  int totalDiskSpace = await SysInfo.getTotalDiskSpace();
  int freeDiskSpace = await SysInfo.getFreeDiskSpace();
  print('Total Disk Space: $totalDiskSpace bytes');
  print('Free Disk Space: $freeDiskSpace bytes');
}

获取操作系统信息

void getOsInfo() async {
  String osName = await SysInfo.operatingSystemName;
  String osVersion = await SysInfo.operatingSystemVersion;
  print('OS Name: $osName');
  print('OS Version: $osVersion');
}

4. 完整示例

以下是一个简单的 Flutter 应用示例，展示如何使用 sys_info 插件获取并显示系统信息：

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

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'System Info Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: SystemInfoScreen(),
    );
  }
}

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

class _SystemInfoScreenState extends State<SystemInfoScreen> {
  String cpuInfo = 'Loading...';
  String memoryInfo = 'Loading...';
  String diskInfo = 'Loading...';
  String osInfo = 'Loading...';

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

  void loadSystemInfo() async {
    String processorName = await SysInfo.processorName;
    int numberOfCores = await SysInfo.numberOfCores;
    int totalPhysicalMemory = await SysInfo.getTotalPhysicalMemory();
    int freePhysicalMemory = await SysInfo.getFreePhysicalMemory();
    int totalDiskSpace = await SysInfo.getTotalDiskSpace();
    int freeDiskSpace = await SysInfo.getFreeDiskSpace();
    String osName = await SysInfo.operatingSystemName;
    String osVersion = await SysInfo.operatingSystemVersion;

    setState(() {
      cpuInfo = 'Processor: $processorName\nCores: $numberOfCores';
      memoryInfo = 'Total Memory: ${totalPhysicalMemory ~/ (1024 * 1024)} MB\nFree Memory: ${freePhysicalMemory ~/ (1024 * 1024)} MB';
      diskInfo = 'Total Disk: ${totalDiskSpace ~/ (1024 * 1024 * 1024)} GB\nFree Disk: ${freeDiskSpace ~/ (1024 * 1024 * 1024)} GB';
      osInfo = 'OS: $osName\nVersion: $osVersion';
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('System Info'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text('CPU Info:\n$cpuInfo', textAlign: TextAlign.center),
            SizedBox(height: 20),
            Text('Memory Info:\n$memoryInfo', textAlign: TextAlign.center),
            SizedBox(height: 20),
            Text('Disk Info:\n$diskInfo', textAlign: TextAlign.center),
            SizedBox(height: 20),
            Text('OS Info:\n$osInfo', textAlign: TextAlign.center),
          ],
        ),
      ),
    );
  }
}