【WPF】扫描的方式发现局域网中的Android设备

C#部分

扫描局域网的IP地址范围

检查每个IP地址是否可达

using System.Net;
using System.Net.Sockets;public static class NetworkScanner
{public static List<IPAddress> ScanLocalNetwork(){List<IPAddress> devices = new List<IPAddress>();string localIP = GetLocalIPAddress();string[] ipParts = localIP.Split('.');string baseIP = ipParts[0] + "." + ipParts[1] + "." + ipParts[2] + ".";for (int i = 1; i < 255; i++){string ip = baseIP + i.ToString();// Ping the IP address to check if it's reachablePing ping = new Ping();PingReply reply = ping.Send(ip, 100); // Timeout set to 100msif (reply.Status == IPStatus.Success){devices.Add(IPAddress.Parse(ip));}}return devices;}private static string GetLocalIPAddress(){IPHostEntry host = Dns.GetHostEntry(Dns.GetHostName());foreach (IPAddress ip in host.AddressList){if (ip.AddressFamily == AddressFamily.InterNetwork){return ip.ToString();}}return "";}
}

上述代码使用Ping类对局域网中的IP地址进行逐个检查，如果某个IP地址能够成功响应则认为该IP地址上有设备存在，可以将其添加到设备列表中。

一旦发现了局域网中的Android设备的IP地址，你可以使用Socket或者其他网络通信库来建立与设备的通信连接。

开始通信

csharp端建立Socket进行连接和通信：

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;public static class NetworkCommunication
{private const int Port = 12345; // 修改为你自己的端口号public static void ConnectAndCommunicate(IPAddress deviceIP){try{// 建立Socket连接Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);IPEndPoint endPoint = new IPEndPoint(deviceIP, Port);socket.Connect(endPoint);Console.WriteLine("Connected to device: " + deviceIP);// 发送数据string message = "Hello, Android device!";byte[] data = Encoding.UTF8.GetBytes(message);socket.Send(data);// 接收数据byte[] buffer = new byte[1024];int bytesRead = socket.Receive(buffer);string receivedMessage = Encoding.UTF8.GetString(buffer, 0, bytesRead);Console.WriteLine("Received message: " + receivedMessage);// 关闭连接socket.Shutdown(SocketShutdown.Both);socket.Close();}catch (Exception ex){Console.WriteLine("Error: " + ex.Message);}}
}

上述代码使用Socket类建立与Android设备的连接，发送一条消息，并接收设备返回的消息。你需要将Port的值修改为你自己的端口号。

Android 端

建立与WPF应用程序的连接并进行通信：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;public class NetworkCommunication {private static final String SERVER_IP = "192.168.0.100"; // 修改为你WPF应用程序所在的IP地址private static final int PORT = 12345; // 修改为你WPF应用程序所使用的端口号public static void connectAndCommunicate() {try {// 建立Socket连接Socket socket = new Socket(SERVER_IP, PORT);// 发送数据PrintWriter out = new PrintWriter(socket.getOutputStream(), true);out.println("Hello, WPF application!");// 接收数据BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));String receivedMessage = in.readLine();System.out.println("Received message: " + receivedMessage);// 关闭连接out.close();in.close();socket.close();} catch (IOException e) {e.printStackTrace();}}
}