android รบกวนช่วยดูโค้ดของแอพแอนดรอยด์ทีครับ[มือใหม่หัดทำ]

using System;package com.example.fan2;

import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;

import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.Menu;
import android.widget.Button;
import android.widget.TextView;
import android.widget.EditText;
import android.widget.Toast;
import android.app.AlertDialog;

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

public class Fan extends Activity {

   EditText editText1 = null;
   Button open = null;
   Button close = null;
   public TextView thetext = null;
   public static String IPSER = null;
   public final static int PORT = 7000;
   public Socket androidsocket;
   public static int i = 0;
   public static String coma = "";
   public DataOutputStream controlout = null;
   private AlertDialog.Builder msg;

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

                
      msg = new AlertDialog.Builder(this);
      msg.setTitle("Please Check info.");
      msg.setPositiveButton(" X ", null);

		editText1 = (EditText) findViewById(R.id.editText1);
		open = (Button) findViewById(R.id.button1);
		close = (Button) findViewById(R.id.button2);
		
		open = (Button) findViewById(R.id.button1);
		open.setOnClickListener(new View.OnClickListener() {
		public void onClick(View v){

         if (checkValid()) {
        		i = 1;
        		coma = "y";
        		coma = coma.toLowerCase();
        		IPSER = editText1.getText().toString();
        		if(i==1);
        		try { 
                                androidsocket = new Socket(IPSER,PORT);
        			controlout = new
				DataOutputStream(androidsocket.getOutputStream());
				controlout.writeBytes(coma);
			        Toast.makeText(Fan.this,"opened",Toast.LENGTH_SHORT).show();

			} catch (IOException e) {

                                Toast.makeText(Fan.this,"not opened",Toast.LENGTH_SHORT).show(); 

			}
            }

		}});

		close = (Button) findViewById(R.id.button2);
		close.setOnClickListener(new View.OnClickListener() {
			public void onClick(View v) {
				i = 0;
				coma = "w";
				coma = coma.toLowerCase();
				IPSER = editText1.getText().toString();
				if(i==0)
					try { androidsocket = new Socket(IPSER,PORT);
					controlout = new
				DataOutputStream(androidsocket.getOutputStream());
					controlout.writeBytes(coma);
			Toast.makeText(Fan.this,"closed",Toast.LENGTH_SHORT).show();
				} catch (IOException e) {Toast.makeText(Fan.this,"not closed",Toast.LENGTH_SHORT).show();
					}
		}});	
	}
        
    public boolean checkValid() {
    	
    	       alertShow = new AlertDialog.Builder(this);
    	       alertShow.setTitle("Sorry, Please check input.");
               alertShow.setPositiveButton("Close", null);
    
    	
    	       if (editText1.getText().length() == 0) {
    		     alertShow.setMessage("Please input your IP Number.");
    		     alertShow.show();
    		    editText1.requestFocus();
    		     return false;
    	       }
     }

	@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_fan, menu);
        return true;
       }
}