title: receiving message in xmmp
body: <p>How do i receive a message from the server? I have the part where i could send message to the server but not receiving it from the server? How and what should it do? i am using xmpp as a transfer protocol</p>
  
  <pre><code>package com.example.xmpp.asmack;
  
  import org.jivesoftware.smack.Chat;
  import org.jivesoftware.smack.ConnectionConfiguration;
  import org.jivesoftware.smack.XMPPConnection;
  import org.jivesoftware.smack.XMPPException;
  import android.app.Activity;
  import android.os.Bundle;
  import android.util.Log;
  import android.view.View;
  import android.view.View.OnClickListener;
  import android.widget.EditText;
  import android.widget.TextView;
  
      public class XMPPAsATransportProtocol extends Activity implements OnClickListener {
          XMPPConnection conn;
          TextView output;
          final String HOST = "vps01.fit3140hack.org";
          final int PORT = 5222;
  
          /** Called when the activity is first created. */
          @Override
          public void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              Log.d("xmppasatransportprotocol", "got to start");
              setContentView(R.layout.main);
              View createbutton = findViewById(R.id.button1);
              View messagebutton = findViewById(R.id.button2);
              View closebutton = findViewById(R.id.button3);
              output = (TextView) findViewById(R.id.textView2);
              Log.d("xmppasatransportprotocol", "got buttons");
  
              createbutton.setOnClickListener(this);
              messagebutton.setOnClickListener(this);
              closebutton.setOnClickListener(this);
          }
  
          private void sendMessage() throws XMPPException {
              Log.d("xmppasatransportprotocol", "sendmessage");
              Chat chat = conn.getChatManager().createChat("22686274test2@" + HOST, null);
              EditText message = (EditText)findViewById(R.id.editText1);
              chat.sendMessage(message.getText().toString());
          }
          private void openConnection() throws XMPPException {
              Log.i("xmppasatransportprotocol", "openconnection");
              ConnectionConfiguration config = new ConnectionConfiguration(HOST, PORT);
              config.setSASLAuthenticationEnabled(true);
              conn = new XMPPConnection(config);
  
              conn.connect();
              conn.login("22686274test1", "dummy");
          }
          private void closeConnection() {
              Log.i("xmppasatransportprotocol", "closeconnection");
  
              conn.disconnect();
          }
  
          public void onClick(View v) {
              try {
                  switch(v.getId()) {
                      case R.id.button1:
                          openConnection();
                          Log.i("xmppasatransportprotocol", "Connected to " + HOST + ":" + PORT);
                          output.setText("Connected to " + HOST + ":" + PORT);
                          break;
                      case R.id.button2:
                          sendMessage();
                          Log.i("xmppasatransportprotocol", "message sent");
                          EditText message = (EditText)findViewById(R.id.editText1);
                          output.setText("Message sent:\n" + message.getText().toString());
                          break;
                      case R.id.button3:
                          closeConnection();
                          output.setText("Disconnected");
                          break;
                      default:    
                          throw new Exception("screwed up exception");
                  }
              } catch (Exception e) {
                  Log.d("xmppasatransportprotocol", "exception caught:" + e.getMessage());
                  output.setText("Error: " + e.getMessage());
              }
          }
      }
  </code></pre>