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package test.client.tcp;

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

import test.client.tcp.R;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

/* Called when the activity is first created. */
public class main extends Activity {

 private String strMsg = "";
 private String read = "";
 private String html = "";
 private Handler mHandler;
 private Socket socket;
 private BufferedReader networkReader;
 private BufferedWriter networkWriter;
 private String ip ="127.0.0.1";
 private int port = 9999;
 private PrintWriter out;
 
 private ListView mConversationView;
 
 private ArrayAdapter<String> mConversationArrayAdapter;
 
 @Override
 protected void onStop() {
  //TODO Auto-generated method stub
  super.onStop();
  try {
   Log.d("DMSG", "Socket close...ok");
   socket.close();
  }catch (IOException e) {
   Log.d("DMSG", "Socket close fail!");
   //TODO Auto-generated catch block
   e.printStackTrace();
  }
 }

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  
  mHandler = new Handler();
  
  try {
   setSocket(ip,port);
   Log.d("DMSG", "OK");
  }catch (IOException e1) {
   //TODO Auto-generated catch block
   e1.printStackTrace();
   Log.d("DMSG", "Error : " + e1);
  }
  
        mConversationArrayAdapter = new ArrayAdapter<String>(this, R.layout.message);
       
        mConversationView = (ListView) findViewById(R.id.in);
        mConversationView.setAdapter(mConversationArrayAdapter);
       
        mConversationView.setTextFilterEnabled(true);        
  
  Button btn = (Button) findViewById(R.id.Button01);
  
  btn.setOnClickListener(new OnClickListener() {
   EditText et = (EditText) findViewById(R.id.EditText01);
   public void onClick(View v) {
    if (et.getText().toString() != null || !et.getText().toString().equals("")) {
     /*PrintWriter*/ out = new PrintWriter(networkWriter,true);
     String return_msg = et.getText().toString();
     out.println(return_msg);
     out.flush();
     strMsg = "Send Message : " + return_msg;
     mConversationArrayAdapter.add(strMsg);
     Log.d("DMSG", "Msg = " + return_msg);
     
     et.setText("");
    } 
   }
  });
  
  try {
   Thread checkUpdate = new echoThread(mConversationArrayAdapter, out);
   checkUpdate.start();
  }
  catch(Exception ex) {
   Log.d ("DMSG", "Error : " + ex);
  }
 }

 class echoThread extends Thread {
  
  ArrayAdapter<String> conversationArrayAdapter;
  PrintWriter pw;
  String tmp;
  
  public echoThread(ArrayAdapter<String> mConversationArrayAdapter, PrintWriter out)
  {
   this.conversationArrayAdapter = mConversationArrayAdapter;
   this.pw = out;
   Log.d("DMSG", "Thread init.");
  }
  
  public void run() {
   try {
    while (true) {
     Log.w("DMSG","chatting is running");
     
     try {
      Thread.sleep(100);
     } catch (Exception e) {
      Log.d("DMSG", "Error : " + e);
     }
     
     read = null;
     while((read = networkReader.readLine()) != null)
     {
               Log.d("DMSG", "receive msg");
               mHandler.post(showUpdate);
     }

    }
   }catch (Exception e) {
    Log.d("DMSG", "Client Thread Error!" + e);
   }
  }
 };
 
 private Runnable showUpdate = new Runnable() {
  public void run() {
   Toast.makeText(main.this,"Coming word: " + html, Toast.LENGTH_SHORT).show();
   mConversationArrayAdapter.add("Receive Message : " + read);
  }
 };
 
 public void setSocket(String ip,int port)throws IOException { 
  try {
   socket =new Socket(ip, port);
   networkWriter = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
   networkReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
   Log.d("DMSG", "Client Socket Init...");
  }catch (IOException e) {
   System.out.println(e);
   e.printStackTrace();
   Log.d("DMSG", "Client Socket Init fail!");
  }
 }
}

 <?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    <ListView android:id="@+id/in"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:stackFromBottom="true"
        android:transcriptMode="alwaysScroll"
        android:layout_weight="1"/>
   <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    <EditText android:id="@+id/EditText01"
     android:layout_height="wrap_content"
     android:layout_width="match_parent"
     android:layout_weight="1"/>
 
    <Button android:id="@+id/Button01"
     android:layout_width="80dip"
     android:layout_height="wrap_content"
     android:text="Send"/>
   </LinearLayout>
</LinearLayout>