java - Problems while displaying path between two points in google maps -

this problem may sound little weird, whenever run app crashes , when change name of latlang variable in function private latlng getcurrentlocation(), starts working. when change anything(even in other file) crashes , have keep changing variable names keep running. sure of problem, related latlang variable.

getapproxtimemaps.java

public class getapproxtimemaps extends fragmentactivity {     private static double destilatitude;     private static double destilongitude;     googlemap mmap;     gmapv2direction md;     latlng userlocation;     latlng destination;       public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_get_approx_time_maps);          if (android.os.build.version.sdk_int > 9) {             strictmode.threadpolicy policy = new strictmode.threadpolicy.builder().permitall().build();             strictmode.setthreadpolicy(policy);         }         userlocation = getcurrentlocation();         double lati = userlocation.latitude;         double longi = userlocation.longitude;          jsonobject jasonobject = getlocationinfo("infosys");         boolean value = getlatlong(jasonobject);         system.out.println("value is: "+ value);         destination = new latlng(destilatitude, destilongitude);          system.out.println("destination latitude :" + destilatitude);         system.out.println("destination longitude :" + destilongitude);           md = new gmapv2direction();         mmap = ((supportmapfragment)getsupportfragmentmanager()                 .findfragmentbyid(r.id.map)).getmap();         double tozoomlat = (destination.latitude + userlocation.latitude)/2;         double tozoomlon = (destination.longitude + userlocation.longitude)/2;          latlng coordinates = new latlng(tozoomlat, tozoomlon);         mmap.animatecamera(cameraupdatefactory.newlatlngzoom(coordinates, 12));          mmap.addmarker(new markeroptions().position(userlocation).title("start"));         mmap.addmarker(new markeroptions().position(destination).title("end"));          document doc = md.getdocument(userlocation, destination, gmapv2direction.mode_driving);         int duration = md.getdurationvalue(doc);         string distance = md.getdistancetext(doc);         string start_address = md.getstartaddress(doc);         string copy_right = md.getcopyrights(doc);         system.out.println(duration);         arraylist<latlng> directionpoint = md.getdirection(doc);         polylineoptions rectline = new polylineoptions().width(3).color(color.blue);          for(int = 0 ; < directionpoint.size() ; i++) {             rectline.add(directionpoint.get(i));         }          mmap.addpolyline(rectline);     }     private latlng getcurrentlocation(){         locationmanager service = (locationmanager) getsystemservice(location_service);         criteria criteria = new criteria();         string provider = service.getbestprovider(criteria, false);         location location = service.getlastknownlocation(provider);         latlng userlocat = new latlng(location.getlatitude(),location.getlongitude());         return userlocat;     }      public static jsonobject getlocationinfo(string address) {         stringbuilder stringbuilder = new stringbuilder();         try {              address = address.replaceall(" ","%20");              httppost httppost = new httppost("http://maps.google.com/maps/api/geocode/json?address=" + address + "&sensor=false");             httpclient client = new defaulthttpclient();             httpresponse response;             stringbuilder = new stringbuilder();               response = client.execute(httppost);             httpentity entity = response.getentity();             inputstream stream = entity.getcontent();             int b;             while ((b = stream.read()) != -1) {                 stringbuilder.append((char) b);             }         } catch (clientprotocolexception e) {         } catch (ioexception e) {         }          jsonobject jsonobject = new jsonobject();         try {             jsonobject = new jsonobject(stringbuilder.tostring());         } catch (jsonexception e) {             // todo auto-generated catch block             e.printstacktrace();         }          return jsonobject;     }     public static boolean getlatlong(jsonobject jsonobject) {          try {              destilongitude = ((jsonarray)jsonobject.get("results")).getjsonobject(0)                     .getjsonobject("geometry").getjsonobject("location")                     .getdouble("lng");              destilatitude = ((jsonarray)jsonobject.get("results")).getjsonobject(0)                     .getjsonobject("geometry").getjsonobject("location")                     .getdouble("lat");          } catch (jsonexception e) {             return false;          }          return true;     }