Android与server通信中的方法（TCP）高效的安全完整

我以前一直使用sockets实现emulator和PC进行通讯，卡了几天，最后请教其它人最终能够连接了。  错误原因是在IP和port，IP要用本机IP（在CMD输入ipconfig。注意：每次开机本机IP都不同，ADSL是动态IP），port用emulator的名称，5554或5556.java sever文件要另外建javaproject执行。在androidproject执行不了java（run application） 

client代码： 

Java代码  

package com.yarin.android.Examples_08_04;   

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;   

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;   

public class Activity01 extends Activity
{
    private final String        DEBUG_TAG   = "Activity01";   

    private TextView    mTextView=null;
    private EditText    mEditText=null;
    private Button      mButton=null;   

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);   

        mButton = (Button)findViewById(R.id.Button01);
        mTextView=(TextView)findViewById(R.id.TextView01);
        mEditText=(EditText)findViewById(R.id.EditText01);   

        //登陆
        mButton.setOnClickListener(new OnClickListener()
        {
            public void onClick(View v)
            {
                Socket socket = null;
                String message = mEditText.getText().toString() + "\r\n";
                try
                {
                    //创建Socket
                    socket = new Socket("116.29.27.138",5554); //查看本机IP,每次开机都不同
                    //socket=new Socket("192.168.1.110",50000);
                    //向server发送消息
                    PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);
                    out.println(message);    

                    //接收来自server的消息
                    BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                    String msg = br.readLine();    

                    if ( msg != null )
                    {
                        mTextView.setText(msg);
                    }
                    else
                    {
                        mTextView.setText("数据错误!");
                    }
                    //关闭流
                    out.close();
                    br.close();
                    //关闭Socket
                    socket.close();
                }
                catch (Exception e)
                {
                    // TODO: handle exception
                    Log.e(DEBUG_TAG, e.toString());
                }
            }
        });
    }
}  

package com.yarin.android.Examples_08_04; 

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket; 

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView; 

public class Activity01 extends Activity
{
private final String DEBUG_TAG = "Activity01"; 

private TextView mTextView=null;
private EditText mEditText=null;
private Button mButton=null; 

@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main); 

mButton = (Button)findViewById(R.id.Button01);
mTextView=(TextView)findViewById(R.id.TextView01);
mEditText=(EditText)findViewById(R.id.EditText01); 

//登陆
mButton.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Socket socket = null;
String message = mEditText.getText().toString() + "\r\n";
try
{
//创建Socket
socket = new Socket("116.29.27.138",5554); //查看本机IP,每次开机都不同
//socket=new Socket("192.168.1.110",50000);
//向server发送消息
PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);
out.println(message); 

//接收来自server的消息
BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String msg = br.readLine(); 

if ( msg != null )
{
mTextView.setText(msg);
}
else
{
mTextView.setText("数据错误!");
}
//关闭流
out.close();
br.close();
//关闭Socket
socket.close();
}
catch (Exception e)
{
// TODO: handle exception
Log.e(DEBUG_TAG, e.toString());
}
}
});
}
}

server端代码： 

Java代码  

package com.yarin.android.Examples_08_04;   

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;   

public class Server implements Runnable
{
    public void run()
    {
        try
        {
            //创建ServerSocket
            ServerSocket serverSocket = new ServerSocket(5554);
            while (true)
            {
                //接受客户端请求
                Socket client = serverSocket.accept();
                System.out.println("accept");
                try
                {
                    //接收客户端消息
                    BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
                    String str = in.readLine();
                    System.out.println("read:" + str);
                    //向服务器发送消息
                    PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(client.getOutputStream())),true);
                    out.println("server message");
                    //关闭流
                    out.close();
                    in.close();
                }
                catch (Exception e)
                {
                    System.out.println(e.getMessage());
                    e.printStackTrace();
                }
                finally
                {
                    //关闭
                    client.close();
                    System.out.println("close");
                }
            }
        }
        catch (Exception e)
        {
            System.out.println(e.getMessage());
        }
    }
    //main函数。开启服务器
    public static void main(String a[])
    {
        Thread desktopServerThread = new Thread(new Server());
        desktopServerThread.start();
    }
}  

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