title: How to make a chat server and client in android
body: <p>I want to make an chat application in android. I was making it like simple java application using socket but it is not working. Pls suggest what I should do.</p>
  
  <p>This is my code. On the click of button, app is closing forcely..</p>
  
  <pre><code>package pack.chat;
  
  import android.app.Activity;
  import android.content.DialogInterface.OnClickListener;
  import android.content.Intent;
  import android.content.SharedPreferences.Editor;
  
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.net.*;
  import java.io.*;
  import android.os.Bundle;
  import android.view.View;
  import android.widget.Button;
  import android.widget.EditText;
  
  
  
  public class chatAct extends Activity implements android.view.View.OnClickListener {
      /** Called when the activity is first created. */
  
      PrintWriter out;
      BufferedReader in ;
      Socket socketClient;
      EditText edit1;
      String editTextString;
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.main);
  
          try{
               socketClient= new Socket( "hddlntd6014578 ", 8180); 
               out = new PrintWriter(socketClient.getOutputStream(), true);
               in = new BufferedReader(new InputStreamReader(socketClient.getInputStream()));
          }
         catch (UnknownHostException e){
             System.out.println("Host cannt be reached");
         }
         catch (IOException i){
             System.out.println("IO cannt be found");
         }
  
  
         Button searchButton = (Button)findViewById(R.id.Button01);
         searchButton.setOnClickListener(this);
  
        // InputStreamReader input= new InputStreamReader();
       //  BufferedReader stringForServer= new BufferedReader(new InputStreamReader(R.id.EditText01));
  
      }
      @Override
      public void onClick(View v) {
          // TODO Auto-generated method stub
          edit1= (EditText)findViewById(R.id.EditText01);
  
             System.out.println(edit1.getText().toString());
  
                 String forServer = edit1.getText().toString();
             out.println(forServer);
      }
  }
  </code></pre>
  
  <p>You can extract that I am a new bee. Please suggest something. If you have a code and if u can then pls share that with me.</p>
  
  <p>Log CAT::</p>
  
  <pre><code>05-11 15:54:39.614: WARN/dalvikvm(370): threadid=1: thread exiting with uncaught exception (group=0x40015560)
  05-11 15:54:39.624: ERROR/AndroidRuntime(370): FATAL EXCEPTION: main
  05-11 15:54:39.624: ERROR/AndroidRuntime(370): java.lang.NullPointerException
  05-11 15:54:39.624: ERROR/AndroidRuntime(370):     at pack.chat.chatAct.onClick(chatAct.java:61)
  05-11 15:54:39.624: ERROR/AndroidRuntime(370):     at android.view.View.performClick(View.java:2485)
  05-11 15:54:39.624: ERROR/AndroidRuntime(370):     at android.view.View$PerformClick.run(View.java:9080)
  05-11 15:54:39.624: ERROR/AndroidRuntime(370):     at android.os.Handler.handleCallback(Handler.java:587)
  05-11 15:54:39.624: ERROR/AndroidRuntime(370):     at android.os.Handler.dispatchMessage(Handler.java:92)
  05-11 15:54:39.624: ERROR/AndroidRuntime(370):     at android.os.Looper.loop(Looper.java:123)
  05-11 15:54:39.624: ERROR/AndroidRuntime(370):     at android.app.ActivityThread.main(ActivityThread.java:3647)
  05-11 15:54:39.624: ERROR/AndroidRuntime(370):     at java.lang.reflect.Method.invokeNative(Native Method)
  05-11 15:54:39.624: ERROR/AndroidRuntime(370):     at java.lang.reflect.Method.invoke(Method.java:507)
  05-11 15:54:39.624: ERROR/AndroidRuntime(370):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
  05-11 15:54:39.624: ERROR/AndroidRuntime(370):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
  05-11 15:54:39.624: ERROR/AndroidRuntime(370):     at dalvik.system.NativeStart.main(Native Method)
  05-11 15:54:39.634: WARN/ActivityManager(61):   Force finishing activity pack.chat/.chatAct
  05-11 15:54:40.164: WARN/ActivityManager(61): Activity pause timeout for HistoryRecord{40672790 pack.chat/.chatAct}
  </code></pre>