android中客服端和服务器端的链接

本文主要简单介绍了android手机中模拟客户端和服务器端的通信，其中服务器端的开发使用了JavaSE中的知识，其主要代码如下：

   android客服端源码：

   

package com.socket.client;

import java.io.*;
import java.net.Socket;
import java.net.UnknownHostException;

import android.app.Activity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class main extends Activity implements OnClickListener {
    // 定义声明需要用到的UI元素
    private EditText edtmsgcontent;
    private Button btnSend;
    //ip地址
    private String ip = "10.0.2.2";
    //端口号
    private int port = 8080;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        InitView();
    }

    private void InitView() {
        // 通过id获取ui元素对象
        edtmsgcontent = (EditText) findViewById(R.id.msgcontent);
        btnSend = (Button) findViewById(R.id.btnsend);
        // 为btnsend设置点击事件
        btnSend.setOnClickListener(this);
    }

    public void onClick(View bt) {
        try {
            String msg = edtmsgcontent.getText().toString();
            if (!TextUtils.isEmpty(msg))
                SendMsg(ip, port, msg);
            else {
                Toast.makeText(this, "请先输入要发送的内容", Toast.LENGTH_LONG);
                edtmsgcontent.requestFocus();
            }
        } catch (Exception e) {

            e.printStackTrace();
        }
    }

    public void SendMsg(String ip, int port, String msg)
            throws UnknownHostException, IOException {
        try {
            Socket socket = null;
            socket = new Socket(ip, port);
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(
                    socket.getOutputStream()));
            writer.write(msg);
            writer.flush();
            writer.close();
            socket.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

  注意要为其添加权限：

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

 服务器端源码：

    

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

public class TCPDesktopServer implements Runnable {

    public static final String SERVERIP = "10.0.2.2";

    public static final int SERVERPORT = 8080;

    public void run() {

        try {

            System.out.println("S: Connecting...");

            ServerSocket serverSocket = new ServerSocket(SERVERPORT);

            while (true) {

                Socket client = serverSocket.accept();

                System.out.println("S: Receiving...");

                try {

                    BufferedReader in = new BufferedReader(
                            new InputStreamReader(client.getInputStream()));

                    String str = in.readLine();

                    System.out.println("S: Received: '" + str + "'");

                } catch (Exception e) {

                    System.out.println("S: Error");

                    e.printStackTrace();

                } finally {

                    client.close();

                    System.out.println("S: Done.");

                }

            }

        } catch (Exception e) {

            System.out.println("S: Error");

            e.printStackTrace();
        }
    }

    public static void main(String a[]) {

        Thread desktopServerThread = new Thread(new TCPDesktopServer());

        desktopServerThread.start();
    }

}

 其结果如下：在android手机端中输入内容

      

 

当点击发送时，我们可以看到在服务器端的控制台中输入所接受到的内容