deepak - Sun Aug 05 2012 12:11:01 GMT-0400 (EDT)

Sample Code

public boolean isOnline() {
       ConnectivityManager conMgr = (ConnectivityManager) 
       getApplicationContext().
       getSystemService(Context.CONNECTIVITY_SERVICE);
       
NetworkInfo netInfo = conMgr.getActiveNetworkInfo();

       if(netInfo == null || 
          !netInfo.isConnected() || 
          !netInfo.isAvailable())
    {
       Toast.makeText
          (this, "No Internet connection!", 
           Toast.LENGTH_LONG).show();
           return false;
       }
   return true; 
}