안드로이드로 서버로 이미지 파일 전송 앱을 만들려고하는데 구현은 다한거같은데 실행에서 작동을 하지 않네요;;
원인을 알려주세요!!오류같은건 안나는데 도통 모르겠네요;;;



client=================================================================
package exam.android;

import java.io.*;
import java.net.*;
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.Toast;

public class android extends Activity {
  /** Called when the activity is first created. */
private String return_msg;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
   
    final EditText et = (EditText)findViewById(R.id.EditText01);
    final EditText et1 = (EditText)findViewById(R.id.EditText02);
    Button btn = (Button)findViewById(R.id.Button01);

   
    btn.setOnClickListener(new OnClickListener(){
    public void onClick(View v){
     if(et.getText().toString().equals("") || !et1.getText().toString().equals("")){
     TCPclient tp = new TCPclient(et.getText().toString(),et1.getText().toString());
    
     tp.run();
    

     }
    }
    });
       
  }
 
  private class TCPclient implements Runnable {
  private String serverIP ;
  private static final int serverPort = 5555;
  private String msg;
  //private String return_msg;
 
  public TCPclient(String _msg,String _ip){
   this.msg = _msg;
   this.serverIP = _ip;
  }
  @Override
  public void run() {
   // TODO Auto-generated method stub
   try {
      InetAddress serverAddr = InetAddress.getByName(serverIP);
     
      Log.d("TCP", "C: Connecting...");
      Socket socket = new Socket(serverAddr, serverPort);
     
     try {
      Log.d("TCP", "C: Sending: '" + msg + "'");
      PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);
     
      out.println(msg);
      out.flush();
     
     
      DataInputStream dis=null;
      dis = new DataInputStream(new FileInputStream(new File("/sdcard/DCIM/Camera/"+msg)));
      DataOutputStream dos=null;
      dos =new DataOutputStream(socket.getOutputStream());
     
      int b=0;
     
      while((b=dis.read())!=-1){
      dos.writeByte(b);dos.flush();
      }
     
      Log.d("TCP", "C: Sent.");
         Log.d("TCP", "C: Done.");
        
         BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
         return_msg = in.readLine();
        
         Toast t = Toast.makeText(getApplicationContext(),return_msg, Toast.LENGTH_LONG);
         t.show();
         Log.d("TCP", "C: Server send to me this message -->" + return_msg);
        } catch(Exception e) {
          Log.e("TCP", "C: Error1", e);
      } finally {
       socket.close();
      }
      } catch (Exception e) {
        Log.e("TCP", "C: Error2", e);
      }
  }
 
  }
}

server=============================================================================
 import java.io.*;
 import java.net.*;
import java.net.Socket;
public class androidserver implements Runnable{

  public static final int ServerPort = 5555; // ex: 5555
 

 
  public static void main(String[] args) {
   Thread desktopServerThread = new Thread(new androidserver());
   desktopServerThread.start();
  }

 @Override
 public void run() {
    try{
     System.out.println("S: Connecting...");
     ServerSocket serverSocket = new ServerSocket(ServerPort);

     while (true) {
   System.out.println("S: Receiving...");
      Socket client = serverSocket.accept();
  

      try {
       BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
       String str = in.readLine();
     
       File f=new File("c:\\",str);
       FileOutputStream output=new FileOutputStream(f);
       int i=0;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
       while((i=client.getInputStream().read())!=-1){
        output.write((char)i);
       }
      
       System.out.println("S: Received: '" + str + "'");
       PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(client.getOutputStream())),true);
       out.println("Server 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: Error1");
     e.printStackTrace();
    }
  
 }
}