Question

I am using this method to draw route between two points on map in my application

 private void DrawPath(GeoPoint src, GeoPoint dest, int color,
          MapView mMapView01) {


        // connect to map web service
        StringBuilder urlString = new StringBuilder();
        urlString.append("http://maps.google.com/maps?f=d&hl=en");
        urlString.append("&saddr=");//from
        urlString.append( Double.toString((double)src.getLatitudeE6()/1.0E6 ));
        urlString.append(",");
        urlString.append( Double.toString((double)src.getLongitudeE6()/1.0E6 ));
        urlString.append("&daddr=");//to
        urlString.append( Double.toString((double)dest.getLatitudeE6()/1.0E6 ));
        urlString.append(",");
        urlString.append( Double.toString((double)dest.getLongitudeE6()/1.0E6 ));
        urlString.append("&ie=UTF8&0&om=0&output=kml");
        Log.d("xxx","URL="+urlString.toString());


        try
        {
          URL url = new URL(urlString.toString());
          urlString = null;
          HttpURLConnection urlConnection=(HttpURLConnection)url.openConnection();
          urlConnection.setRequestMethod("GET");
          urlConnection.setDoOutput(true);
          urlConnection.setDoInput(true);
          urlConnection.connect();

          DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
          DocumentBuilder db = dbf.newDocumentBuilder();
          Document doc = db.parse(urlConnection.getInputStream());

          if(doc.getElementsByTagName("GeometryCollection").getLength()>0)
          {

            String path = doc.getElementsByTagName("GeometryCollection").item(0).getFirstChild().getFirstChild().getFirstChild().getNodeValue() ;
            Log.d("xxx","path="+ path);
            String [] pairs = path.split(" ");
            String[] lngLat = pairs[0].split(","); // lngLat[0]=longitude lngLat[1]=latitude lngLat[2]=height
            // src
            GeoPoint startGP = new GeoPoint((int)(Double.parseDouble(lngLat[1])*1E6),(int)(Double.parseDouble(lngLat[0])*1E6));

            GeoPoint gp1;
            GeoPoint gp2 = startGP;



            for(int i=1;i<pairs.length;i++) // the last one would be crash
            {
              lngLat = pairs[i].split(",");
              gp1 = gp2;
              // watch out! For GeoPoint, first:latitude, second:longitude
              gp2 = new GeoPoint((int)(Double.parseDouble(lngLat[1])*1E6),(int)(Double.parseDouble(lngLat[0])*1E6));



              mapRouteOverlay = new MapRouteOverlay(gp1,gp2,2,color);

              mMapView01.getOverlays().add(mapRouteOverlay);
              Log.d("xxx","pair:" + pairs[i]);
              Log.e("Check  ","Draw  " + mapRouteOverlay);
            }

          }
        }
        catch (MalformedURLException e)
        {
          e.printStackTrace();
        }
        catch (IOException e)
        {
          e.printStackTrace();
        }
        catch (ParserConfigurationException e)
        {
          e.printStackTrace();
        }
        catch (SAXException e)
        {
          e.printStackTrace();
        }


      }

this method is working fine(from last three months) to draw path but form about 15 days it gives problem and not showing/drawing path.

my logcat output is

 08-11 10:15:47.363: W/System.err(401): org.xml.sax.SAXParseException: unterminated entity ref (position:ENTITY_REF &@1:808 in java.io.InputStreamReader@44f9cde8) 
 08-11 10:15:47.373: W/System.err(401):     at org.apache.harmony.xml.parsers.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:153)
 08-11 10:15:47.373: W/System.err(401):     at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:110)
 08-11 10:15:47.373: W/System.err(401):     at com.map.MapMainActivity.DrawPath(MapMainActivity.java:621)
 08-11 10:15:47.373: W/System.err(401):     at com.map.MapMainActivity.getDirection(MapMainActivity.java:582)
 08-11 10:15:47.373: W/System.err(401):     at com.map.MapMainActivity$DownloadWebPageTask.onPostExecute(MapMainActivity.java:1318)
 08-11 10:15:47.373: W/System.err(401):     at com.map.MapMainActivity$DownloadWebPageTask.onPostExecute(MapMainActivity.java:1)
 08-11 10:15:47.373: W/System.err(401):     at android.os.AsyncTask.finish(AsyncTask.java:417)
 08-11 10:15:47.373: W/System.err(401):     at android.os.AsyncTask.access$300(AsyncTask.java:127)
 08-11 10:15:47.373: W/System.err(401):     at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429)
 08-11 10:15:47.373: W/System.err(401):     at android.os.Handler.dispatchMessage(Handler.java:99)
 08-11 10:15:47.373: W/System.err(401):     at android.os.Looper.loop(Looper.java:123)
 08-11 10:15:47.383: W/System.err(401):     at android.app.ActivityThread.main(ActivityThread.java:4627)
 08-11 10:15:47.383: W/System.err(401):     at java.lang.reflect.Method.invokeNative(Native Method)
 08-11 10:15:47.383: W/System.err(401):     at java.lang.reflect.Method.invoke(Method.java:521)
 08-11 10:15:47.383: W/System.err(401):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
 08-11 10:15:47.383: W/System.err(401):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
 08-11 10:15:47.383: W/System.err(401):     at dalvik.system.NativeStart.main(Native Method)

I could not understand what is the problem?
any help?

Thanks in Advance.

Answer 1

see this link definitely help you.
because the Google Directions from Google by parsing the KML file is no longer available since 27 July 2012 (because Google has changed the structure of retrieving Google Directions, now you can only get it by JSON or XML), it is time to migrate your code to JSON instead of KML.