network_monitor 是一个用于监听网络状态变化的 Flutter 插件。它可以帮助你检测设备的网络连接状态，例如设备是否连接到互联网，以及连接的网络类型（Wi-Fi、移动数据等）。以下是如何使用 network_monitor 插件的基本步骤：

1. 添加依赖

首先，你需要在 pubspec.yaml 文件中添加 network_monitor 依赖：

dependencies:
  flutter:
    sdk: flutter
  network_monitor: ^0.0.1 # 请检查最新版本

然后运行 flutter pub get 来获取依赖。

2. 导入包

在你的 Dart 文件中导入 network_monitor 包：

import 'package:network_monitor/network_monitor.dart';

3. 初始化 NetworkMonitor

在使用 NetworkMonitor 之前，你需要先对其进行初始化：

final networkMonitor = NetworkMonitor();

4. 监听网络状态变化

你可以使用 onStatusChange 来监听网络状态的变化：

networkMonitor.onStatusChange.listen((NetworkStatus status) {
  print('Network status changed: $status');
});

NetworkStatus 是一个枚举类型，可能的值包括：

MonteBasedOn your 'mateBasedOn your materials, here’s a complete guide on using the network_monitor Flutter plugin:

Flutter Network Monitor Plugin: Usage Guide

network_monitor is a Flutter plugin designed to monitor network connectivity status, such as whether the device is connected to the internet and the type of connection (Wi-Fi, mobile data, etc.). Below is a step-by-step guide to using this plugin.

1. Add Dependency

Add the network_monitor plugin to your pubspec.yaml file:

dependencies:
  flutter:
    sdk: flutter
  network_monitor: ^0.0.1 # Ensure you use the latest version

Then, run flutter pub get to fetch the dependency.

2. Import the Package

Import the network_monitor package in your Dart file:

import 'package:network_monitor/network_monitor.dart';

3. Initialize NetworkMonitor

Initialize the NetworkMonitor instance before using it:

final networkMonitor = NetworkMonitor();

4. Listen for Network Status Changes

Use the onStatusChange stream to listen for network status updates:

networkMonitor.onStatusChange.listen((NetworkStatus status) {
  print('Network status changed: $status');
});

NetworkStatus is an enum with the following possible values:

• NetworkStatus.connected: The device is connected to the internet.
• NetworkStatus.disconnected: The device is not connected to the internet.
• NetworkStatus.wifi: The device is connected via Wi-Fi.
• NetworkStatus.mobile: The device is connected via mobile data.

5. Check Current Network Status

You can also check the current network status using the currentStatus property:

final currentStatus = await networkMonitor.currentStatus;
print('Current network status: $currentStatus');

6. Handle Permissions (if needed)

Ensure that your app has the necessary permissions to access network information. For Android, add the following permissions to your AndroidManifest.xml:

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

For iOS, no additional permissions are required.

7. Dispose the Monitor (Optional)

If you no longer need to monitor network status, you can dispose of the NetworkMonitor instance to free up resources:

networkMonitor.dispose();

Example Usage

Here’s a complete example of how to use network_monitor in a Flutter app:

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

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: NetworkMonitorExample(),
    );
  }
}

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

class _NetworkMonitorExampleState extends State<NetworkMonitorExample> {
  final networkMonitor = NetworkMonitor();
  NetworkStatus _currentStatus = NetworkStatus.disconnected;

  [@override](/user/override)
  void initState() {
    super.initState();
    networkMonitor.onStatusChange.listen((status) {
      setState(() {
        _currentStatus = status;
      });
    });
  }

  [@override](/user/override)
  void dispose() {
    networkMonitor.dispose();
    super.dispose();
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Network Monitor Example'),
      ),
      body: Center(
        child: Text(
          'Network Status: $_currentStatus',
          style: TextStyle(fontSize: 24),
        ),
      ),
    );
  }
}