android - Google Map API v2 Heatmap not showing all locations -

i'm trying out google api v2 heatmap (android) introduced february , it's not working entirely. i'm not sure if it's same problem google maps api v2 heatmap won't reliably display (and can't contact him comments because don't have enough rep.. :c ).

using locations file

anyway, trying app googlemap , same locations in guide (https://developers.google.com/maps/documentation/android/utility/heatmap) , when launch it, can see 3/5 locations.

i tried adding more points , still, it's consistently not showing them all, can't see pattern or something. code same in guide.

private void addheatmap() {     list<latlng> list = null;      // data: latitude/longitude positions of police stations.     try {         list = readitems(r.raw.police_stations);     } catch (jsonexception e) {         toast.maketext(this, "problem reading list of locations.", toast.length_long).show();     }       // create heat map tile provider, passing latlngs of police stations.     mprovider = new heatmaptileprovider.builder()             .data(list)             .build();     // add tile overlay map, using heat map tile provider.     moverlay = mmap.addtileoverlay(new tileoverlayoptions().tileprovider(mprovider));  }       private arraylist<latlng> readitems(int resource) throws jsonexception {         arraylist<latlng> list = new arraylist<latlng>();         inputstream inputstream = getresources().openrawresource(resource);         string json = new scanner(inputstream).usedelimiter("\\a").next();         jsonarray array = new jsonarray(json);         (int = 0; < array.length(); i++) {             jsonobject object = array.getjsonobject(i);             double lat = object.getdouble("lat");             double lng = object.getdouble("lng");             latlng latlng = new latlng(lat, lng);                           list.add(latlng);          }         return list;     } 

trying weighted locations had same result, of them showing , not.

using locations "onclick"

in case, normal latlng added , map updated until got equator , stopped :p.

for case of weightedlatlngs, didn't update/show :(

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that's it... don't know more information, whether it's api, device or else.

does know why might happen and/or solution ?

thank in advance !

btw, i'm using android 4.0.4 on samsung galaxy s duos if may prove useful..

the googlemaps api heatmap allows 1,000 plotted points. can reduced filtering out original data or converting "weighted locations".