ผมต้องทำโปรแจ๊ค ส่งค่าไปมา ระหว่าง server - client

เลยซื้อหนังสือมาลองเขียน ผลปรากฏว่า ส่งไปไม่ได้อะคับ

ฝั่ง server

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 SimpleServer implements Runnable{

public void run(){

try{

    ServerSocket serverSocket = new ServerSocket(4449);
    Socket client = null;
    System.out.println("Server Strated");
    String message = "Goodbye";

while(true){ client = serverSocket.accept();

    System.out.println("Client accept:" + client);  

try{

BufferedReader in = new BufferedReader(

                 new InputStreamReader(client.getInputStream()));

String str = in.readLine();

System.out.println("read:" + str);

PrintWriter out = new PrintWriter(new BufferedWriter(

              new OutputStreamWriter(client.getOutputStream())),true);

out.println(message);

out.close();

in.close();

}catch(Exception e){

    client.close();

    System.out.println("close");

    System.out.println(e.getMessage());

    e.printStackTrace();}

} }catch(Exception e){

    System.out.println(e.getMessage());}

}   
public static void main(String a[]){

    Thread desktopServerThread=new Thread(new SimpleServer());

    desktopServerThread.start();

}

}

ฝั่ง client

package com.kku.cs;

import android.app.Activity;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import java.net.Socket;

import android.view.View;

import android.view.View.OnClickListener;

import android.os.Bundle;

import android.util.Log;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

public class AndriodClient extends Activity {

public final String DEBUG_TAG = "AndroidClient";

private TextView mTextView = null;

private EditText mEditText = null;

private Button mButton = null;

private Socket socket = null;

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);

mButton.setOnClickListener(new OnClickListener(){

public void onClick(View v){

    String message = mEditText.getText().toString()+ "\r\n";

try {
    socket = new Socket("192.168.1.19",4449);

    PrintWriter out = new PrintWriter(new BufferedWriter(
        new OutputStreamWriter(socket.getOutputStream())),true);
    out.println(message);


    BufferedReader br = new BufferedReader(new InputStreamReader(
            socket.getInputStream()));
    String msg = br.readLine();


    if(msg != null){
        mTextView.setText(mTextView.getText()+"\n"+msg);
        }
    else {
        mTextView.setText("Data error!");
    }
        out.close();
        br.close();
        socket.close();
    } catch(Exception e){
    Log.e(DEBUG_TAG, e.toString());
    }
    }
});
}

}