GeoCoder.java :  » Geo » geo-camera » com » geocamera » Android Open Source

package com.geocamera;

import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
/**
 * 
 * @author Punsiru Alwis
 *
 */
public class GeoCoder {
  
  private static final int READ_TIMEOUT = 80000;
  
  public static String reverseGeocode(GeoDegree loc)
  {
      String localityName = "";
      HttpURLConnection connection = null;
      URL serverAddress = null;

      try 
      {
          // build the URL using the latitude & longitude you want to lookup
          // NOTE: I chose XML return format here but you can choose something else
          serverAddress = new URL("http://maps.google.com/maps/geo?q=" + Double.toString(loc.getLatitudeE6()/1000000.0) + "," + Double.toString(loc.getLongitudeE6()/1000000.0) +
                "&output=xml&oe=utf8&sensor=true&key=" + R.string.GOOGLE_MAPS_API_KEY);
          System.out.println(serverAddress);
          //set up out communications stuff
          connection = null;
          
          //Set up the initial connection
      connection = (HttpURLConnection)serverAddress.openConnection();
      connection.setRequestMethod("GET");
      connection.setDoOutput(true);
      connection.setReadTimeout(READ_TIMEOUT);
                      
      connection.connect();
        
      try
      {
        InputStreamReader isr = new InputStreamReader(connection.getInputStream());
        InputSource source = new InputSource(isr);
        SAXParserFactory factory = SAXParserFactory.newInstance();
        SAXParser parser = factory.newSAXParser();
        XMLReader xr = parser.getXMLReader();
        GoogleReverseGeocodeXmlHandler handler = new GoogleReverseGeocodeXmlHandler();
        
        xr.setContentHandler(handler);
        xr.parse(source);
        
        localityName = handler.getLocalityName();
      }
      catch (Exception ex)
      {
        ex.printStackTrace();
      }
      
      }
      catch (Exception ex)
      {
          ex.printStackTrace();
      }
      
      return localityName;
  }
}