pc 机和android 手机之间的通信_pc-android connection-优快云博客

本文链接：https://blog.youkuaiyun.com/tianxuhong/article/details/45368507

本文介绍了一个Android客户端与C语言服务器端通过Socket进行通信的实例。客户端使用Java编写，实现连接服务器、发送消息的功能；服务器端采用C语言编写，能够监听并接收来自客户端的消息。

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客户端：

package com.android.settings;

import java.io.IOException;
import java.io.PrintStream;
import java.net.Socket;
import java.net.UnknownHostException;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class BogoclientActivity extends Activity {
   /* 服务器地址 */
   private final String SERVER_HOST_IP = "10.0.0.158";

   /* 服务器端口 */
   private final int SERVER_HOST_PORT = 9400;

   private Button btnConnect;
   private Button btnSend;
   private EditText editSend;
   private Socket socket;
   private PrintStream output;

   public void toastText(String message) {
       Toast.makeText(this, message, Toast.LENGTH_LONG).show();
   }

   public void handleException(Exception e, String prefix) {
       e.printStackTrace();
       //toastText(prefix + e.toString());
   }

   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.xml.client_socket_layout);

       initView();

       btnConnect.setOnClickListener(new Button.OnClickListener() {
           @Override
           public void onClick(View v) {

               client client = new client();
               new Thread(client).start();
           }
       });

       btnSend.setOnClickListener(new Button.OnClickListener() {
           @Override
           public void onClick(View v) {
               sendMessage(editSend.getText().toString());
           }
       });
   }

   public void initView() {
       btnConnect = (Button) findViewById(R.id.btnConnect);
       btnConnect.setText("connect");
       btnSend = (Button) findViewById(R.id.btnSend);
       btnSend.setText("send");
       editSend = (EditText) findViewById(R.id.sendMsg);
       editSend.setText("editSend");

       btnSend.setEnabled(false);
       editSend.setEnabled(false);
   }

   public void closeSocket() {
       try {
           output.close();
           socket.close();
       } catch (IOException e) {
           handleException(e, "close exception: ");
       }
   }

   private void initClientSocket() {
       try {
           /* 连接服务器 */
           socket = new Socket(SERVER_HOST_IP, SERVER_HOST_PORT);

           /* 获取输出流 */
           output = new PrintStream(socket.getOutputStream(), true, "utf-8");
           Message message = mHandler.obtainMessage();
           message.arg1 =1;
           mHandler.sendMessage(message);

       } catch (UnknownHostException e) {
           handleException(e, "unknown host exception: " + e.toString());
       } catch (IOException e) {
           handleException(e, "io exception: " + e.toString());
       }
   }

   private void sendMessage(String msg) {
       output.print(msg);
   }



   class client implements Runnable{

       @Override
       public void run() {
           // TODO Auto-generated method stub
           initClientSocket();
       }

   }

   final Handler mHandler = new Handler(){
       @Override
       public void handleMessage(Message msg) {
           // TODO Auto-generated method stub
           super.handleMessage(msg);

           btnConnect.setEnabled(false);
           editSend.setEnabled(true);
           btnSend.setEnabled(true);
       }
   };
}

服务器端package com.android.settings;

import java.io.IOException;
import java.io.PrintStream;
import java.net.Socket;
import java.net.UnknownHostException;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class BogoclientActivity extends Activity {
   /* 服务器地址 */
   private final String SERVER_HOST_IP = "10.0.0.158";

   /* 服务器端口 */
   private final int SERVER_HOST_PORT = 9400;

   private Button btnConnect;
   private Button btnSend;
   private EditText editSend;
   private Socket socket;
   private PrintStream output;

   public void toastText(String message) {
       Toast.makeText(this, message, Toast.LENGTH_LONG).show();
   }

   public void handleException(Exception e, String prefix) {
       e.printStackTrace();
       //toastText(prefix + e.toString());
   }

   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.xml.client_socket_layout);

       initView();

       btnConnect.setOnClickListener(new Button.OnClickListener() {
           @Override
           public void onClick(View v) {

               client client = new client();
               new Thread(client).start();
           }
       });

       btnSend.setOnClickListener(new Button.OnClickListener() {
           @Override
           public void onClick(View v) {
               sendMessage(editSend.getText().toString());
           }
       });
   }

   public void initView() {
       btnConnect = (Button) findViewById(R.id.btnConnect);
       btnConnect.setText("connect");
       btnSend = (Button) findViewById(R.id.btnSend);
       btnSend.setText("send");
       editSend = (EditText) findViewById(R.id.sendMsg);
       editSend.setText("editSend");

       btnSend.setEnabled(false);
       editSend.setEnabled(false);
   }

   public void closeSocket() {
       try {
           output.close();
           socket.close();
       } catch (IOException e) {
           handleException(e, "close exception: ");
       }
   }

   private void initClientSocket() {
       try {
           /* 连接服务器 */
           socket = new Socket(SERVER_HOST_IP, SERVER_HOST_PORT);

           /* 获取输出流 */
           output = new PrintStream(socket.getOutputStream(), true, "utf-8");
           Message message = mHandler.obtainMessage();
           message.arg1 =1;
           mHandler.sendMessage(message);

       } catch (UnknownHostException e) {
           handleException(e, "unknown host exception: " + e.toString());
       } catch (IOException e) {
           handleException(e, "io exception: " + e.toString());
       }
   }

   private void sendMessage(String msg) {
       output.print(msg);
   }



   class client implements Runnable{

       @Override
       public void run() {
           // TODO Auto-generated method stub
           initClientSocket();
       }

   }

   final Handler mHandler = new Handler(){
       @Override
       public void handleMessage(Message msg) {
           // TODO Auto-generated method stub
           super.handleMessage(msg);

           btnConnect.setEnabled(false);
           editSend.setEnabled(true);
           btnSend.setEnabled(true);
       }
   };
}

服务器端：

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

#define PORT 9400
#define MAX_BUFFER 1024

int main()
{
    /* create a socket */
    int server_sockfd = socket(AF_INET, SOCK_STREAM, 0);

    struct sockaddr_in server_addr;
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = inet_addr("10.0.0.158");
    server_addr.sin_port = htons(PORT);

    /* bind with the local file */
    bind(server_sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr));

    /* listen */
    listen(server_sockfd, 5);

    int size;
    char buffer[MAX_BUFFER + 1];
    int client_sockfd;
    struct sockaddr_in client_addr;
    socklen_t len = sizeof(client_addr);

    /* accept a connection */
    printf("waiting connection...\n");
    client_sockfd = accept(server_sockfd, (struct sockaddr *)&client_addr, &len);
    printf("connection established!\n");

    while(1)
    {
        printf("waiting message...\n");

        /* exchange data */
        size = read(client_sockfd, buffer, MAX_BUFFER);
        buffer[size] = '\0';
        printf("Got %d bytes: %s\n", size, buffer);
    }

    /* close the socket */
    close(client_sockfd);

    return 0;
}