java - Getting Location details from Google Map in gwt -


i need perform tasks google map, 1. first need user able place 1 marker 2. retrieve city , other details such street address

does know this?

i wrote minimal example show how achieve you're looking for:

public void onmoduleload() {     rootpanel.get().add(new googlemaps()); }  private class googlemaps extends composite {      private mapwidget fmap;     private geocoder fcoder;     private marker fmarker;      public googlemaps() {         fmap = new mapwidget(latlng.newinstance(47.0559084, 8.3114878), 6);         fmap.setsize("300px", "300px");         fcoder = new geocoder();         markeroptions options = markeroptions.newinstance();         options.setdraggable(true);         fmarker = new marker(latlng.newinstance(47.0559084, 8.3114878), options);         fmap.addoverlay(fmarker);         fmarker.setvisible(false);         addhandlers();         initwidget(fmap);     }      private void addhandlers() {         fmap.addmapdoubleclickhandler(new mapdoubleclickhandler() {              @override             public void ondoubleclick(mapdoubleclickevent event) {                 if (event.getlatlng() != null) {                     performreverselookup(event.getlatlng());                 }             }          });          fmarker.addmarkerdragendhandler(new markerdragendhandler() {              @override             public void ondragend(markerdragendevent event) {                 latlng point = event.getsender().getlatlng();                 if (point != null) {                     performreverselookup(point);                 }             }          });     }      private void performreverselookup(final latlng point) {         fcoder.getlocations(point, new locationcallback() {              @override             public void onsuccess(jsarray<placemark> locations) {                 if (locations.length() > 0) {                     latlng point = locations.get(0).getpoint();                     fmarker.setlatlng(point);                     fmarker.setvisible(true);                     fmap.getinfowindow().open(point, new infowindowcontent(locations.get(0).getaddress()));                 }             }              @override             public void onfailure(int statuscode) {}         });     } }

to first point: create 1 instance of marker , update latlng upon user interaction (done in performreverselookup()).

your second question: after performing reverse lookup can placemark object out of locations array , retrieve details address.


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