How to receive data using UDP in Android?

I use the following code to receive the data from a particular port. It's not working in Android. But sending data to particular port is working fine. public class UDPDemo extends Activity { private TextView tv; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tv = (TextView)findViewById(R.id.recv_message); try { Datagra