how to keep redrawing the polyline and markers when locationmanager gives new location on google maps api for android -

the code works fine first time round, when locationmanager requests update doesn't redraw markers or polylines when location changes little blue gps circle on moves self , thats it. want know how change markers , polylines google maps every time user moves new location

public class myactivity extends fragmentactivity implements routinglistener { googlemap map; latlng user; latlng end; marker user; marker end;    /**  * activity loads map , displays route , pushpins on it.  */  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.main);     try {         if (map == null) {             supportmapfragment fm = (supportmapfragment) getsupportfragmentmanager().                     findfragmentbyid(r.id.map);             map = fm.getmap();             if (map != null) {                 setupmap();             }         }     } catch (exception e) {         e.printstacktrace();     } }  private void setupmap() {     map.setmylocationenabled(true);      locationmanager locationmanager = (locationmanager) getsystemservice(location_service);      criteria criteria = new criteria();      string provider = locationmanager.getbestprovider(criteria, true);      location mylocation = locationmanager.getlastknownlocation(provider);      locationmanager.requestlocationupdates(provider, 5000, 0, (android.location.locationlistener) this);     if(locationmanager!=true){         onlocationchanged(mylocation);     }  }  private void onlocationchanged(location mylocation) {     user.remove();     end.remove();     double latitude = mylocation.getlatitude();      double longitude = mylocation.getlongitude();      end = new latlng(51.493873, -3.18175);      user = new latlng(latitude, longitude);      marker user = map.addmarker(new markeroptions().             position(new latlng(latitude, longitude)).title("you").icon(bitmapdescriptorfactory.fromresource(r.drawable.start_blue)));      marker end = map.addmarker(new markeroptions().             position(end).title("other user").icon(bitmapdescriptorfactory.fromresource(r.drawable.end_green)));      map.movecamera((cameraupdatefactory.newlatlng(user)));     map.animatecamera(cameraupdatefactory.zoomto(15));     routing routing = new routing(routing.travelmode.walking);     routing.registerlistener(this);     routing.execute(user,end); }    @override public void onroutingfailure() {     // routing request failed }  @override public void onroutingstart() {     // routing request starts }  @override public void onroutingsuccess(polylineoptions mpolyoptions, route route) {     polylineoptions polyoptions = new polylineoptions();     polyoptions.color(color.blue);     polyoptions.width(10);     polyoptions.addall(mpolyoptions.getpoints());     map.addpolyline(polyoptions); } 

}

you listening when user has changed location. if want redraw every 5 seconds regardless if user has moved.

using new googleapiclient

private googleapiclient mgoogleapiclient; private static final scheduledexecutorservice delayer = executors.newsinglethreadscheduledexecutor();   @override public void oncreate(bundle savedinstancestate) {     mgoogleapiclient = new googleapiclient.builder(this).addapi(locationservices.api).addconnectioncallbacks(this).addonconnectionfailedlistener(this).build();     mgoogleapiclient.connect(); }  @override public void onconnected(bundle bundle) {     location location;     runnable task = new runnable() {         public void run() {            location = locationservices.fusedlocationapi.getlastlocation(mgoogleapiclient);             // location          }     };     delayer.schedule(task, 5, timeunit.seconds); }