버튼을 클릭했을때 서버에서 문자열을 받아서 출력하는 소스입니다
하지만 클릭시에 알수없는 문제가 발생되네요 도움점;;

package com.ABP;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
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.ImageView;
import android.widget.TextView;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;
import com.ABP.Constants;
import com.ABP.R;


public class Main extends Activity {
    private static final String CLASSTAG = Main.class.getSimpleName();
    private String ipAddress = "192.168.0.34";
    private String port = "9900";
    private String socketInput = "get";
    private TextView socketOutput;
    private Button socketButton;
    @Override
    public void onCreate(final Bundle icicle) {
        super.onCreate(icicle);
        this.setContentView(R.layout.main);
        this.socketOutput = (TextView) findViewById(R.id.socket_output);
        this.socketButton = (Button) findViewById(R.id.socket_button);
        this.socketButton.setOnClickListener(new OnClickListener() {
         
            public void onClick(final View v) {
                socketOutput.setText("");
                String output = callSocket(ipAddress, port, socketInput);
                socketOutput.setText(output);
            }
        });
    }
    private String callSocket(final String ip, final String port, final String socketData) {
        Socket socket = null;
        BufferedWriter writer = null;
        BufferedReader reader = null;
        String output = null;
        try {
            socket = new Socket(ip, Integer.parseInt(port));
            writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
            reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            String input = socketData;
            writer.write(input+ "\n", 0, input.length() + 1);
            writer.flush();
            output = reader.readLine();
            Log.d(Constants.LOGTAG, " " + Main.CLASSTAG + " output - " + output);
            writer.write("EXIT\n", 0, 5);
            writer.flush();
        } catch (IOException e) {
            Log.e(Constants.LOGTAG, " " + Main.CLASSTAG + " IOException calling socket", e);
        } finally {
            try {
                writer.close();
            } catch (IOException e) {
                // swallow
            }
            try {
                reader.close();
            } catch (IOException e) {
                // swallow
            }
            try {
                socket.close();
            } catch (IOException e) {
                // swallow
            }
        }
        
        return output;
    };
}