안녕하세요

안드로이드 시작한 초보입니다 다름이 아니라

구글 날씨 해보는데 결과가 안뜨네요ㅠㅠ

package exam.weather;

import java.io.InputStream;
import java.net.URL;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserFactory;
import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;
import android.widget.TextView;

public class Weather_xmlActivity extends Activity{
    /** Called when the activity is first created. */
   
    //ArrayList<ForecastItem> list;
    TextView desc; //오늘 날짜
    TextView temp; //오늘 기온
    TextView wind;
   
   
   
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
       
        desc = (TextView)findViewById(R.id.desc);
        temp = (TextView)findViewById(R.id.temp);
        wind = (TextView)findViewById(R.id.wind);
         
      WeatherItem item = new WeatherItem();
     
      try
      {
            String url = "http://www.google.co.kr/ig/api?weather=Ulsan";
            URL u = new URL("url);
            InputStream  in= u.openStream();
            XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
            factory.setNamespaceAware(false);
            XmlPullParser xpp = factory.newPullParser();
            xpp.setInput(in, "EUC-KR");

            while (xpp.getEventType() != XmlPullParser.END_DOCUMENT)
            {
                if (xpp.getEventType() == XmlPullParser.START_TAG)
                {
                    if (xpp.getName().equals("forecast_date"))
                    {
                        item.date = xpp.getAttributeValue(0);
                        desc.setText("오늘날짜: " + item.date);
                    }
                    if (xpp.getName().equals("temp_c"))
                    {
                        item.temp = xpp.getAttributeValue(0);
                        temp.setText("오늘기온: " + item.temp);
                    }
                    if (xpp.getName().equals("wind_condition"))
                    {
                        item.wind = xpp.getAttributeValue(0);
                        wind.setText("오늘바람: " + item.wind);
                    }
                    if (xpp.getName().equals("problem_cause"))
                    {
                        Toast.makeText(this, "해당지역의 날씨정보를 이용할 수 없습니다", 0).show();
                        desc.setText("해당지역의 날씨정보를 이용할 수 없습니다.");
                        temp.setText("해당지역의 날씨정보를 이용할 수 없습니다.");
                        wind.setText("해당지역의 날씨정보를 이용할 수 없습니다.");
                    }
                }
                xpp.next();
            }
        }
       catch (Throwable t)
        {
            t.printStackTrace();
        }
 }

}

왜그럴까요?ㅠㅠ