android - Empty RecyclerView from JSON to Fragment -

i'm new android development , first real app. did lots of research can't work.

i'm trying send json data recyclerview in fragment displays blank screen, no error.

here's code:

fragment  public view oncreateview(layoutinflater inflater, viewgroup container,                          bundle savedinstancestate) {     string endpoints = "{\"access\": {\"token\":....;     arraylist<hashmap<string, string>> jsonlist;     view rootview = inflater.inflate(r.layout.fragment_overview, container, false);     jsonlist = endpointsparser.parsejson(endpoints);     recyclerview recyclerview = (recyclerview)rootview.findviewbyid(r.id.overviewrv);     recyclerview.setlayoutmanager(new linearlayoutmanager(getactivity()));     endpointsadapter endpointsadapter = new endpointsadapter(getactivity(),jsonlist);     recyclerview.setadapter(endpointsadapter);     return rootview;     }   parser  public class endpointsparser extends activity{ public static final string publicurl = "publicurl"; public static final string region = "region"; public static final string type = "type"; public static final string name = "name";  public static arraylist<hashmap<string, string>> parsejson(string endpoints){     arraylist<hashmap<string, string>> jsonlist = new arraylist<hashmap<string, string>>();     try {         endpoints endpoint = new endpoints();         jsonobject keystone = new jsonobject(endpoints);         jsonobject access = keystone.getjsonobject("access");         jsonarray servicecatalog = access.getjsonarray("servicecatalog");          (int = 0; < servicecatalog.length(); i++) {             jsonobject objsvc = servicecatalog.getjsonobject(i);             jsonarray endpointsarray = objsvc.getjsonarray("endpoints");             endpoint.setname(objsvc.getstring("name"));             endpoint.settype(objsvc.getstring("type"));             (int j = 0; j < 1; j++) {                 jsonobject objept = endpointsarray.getjsonobject(j);                 endpoint.setregion(objept.getstring("region"));                 endpoint.setpublicurl(objept.getstring("publicurl"));             }              hashmap<string, string> map = new hashmap<string, string>();             map.put(name, endpoint.getname());             map.put(type, endpoint.gettype());             map.put(region, endpoint.getregion());             map.put(publicurl, endpoint.getpublicurl());             jsonlist.add(map);         }     } catch (jsonexception e) {         log.d("errorinitjson", e.tostring());         e.printstacktrace();     }     return jsonlist; }    adapter  public class endpointsadapter extends recyclerview.adapter<endpointlistrowholder> {  arraylist<hashmap<string, string>> endpointslist = new arraylist<hashmap<string, string>>(); public static final string publicurl = "publicurl"; public static final string region = "region"; public static final string type = "type"; public static final string name = "name"; private context mcontext;  public endpointsadapter(context context, arraylist<hashmap<string, string>> endpointslist) {     this.endpointslist = endpointslist;     this.mcontext = context; }  @override public endpointlistrowholder oncreateviewholder(viewgroup viewgroup, int i) {     view v = layoutinflater.from(viewgroup.getcontext()).inflate(r.layout.endpoint_list, null);     endpointlistrowholder mh = new endpointlistrowholder(v);     return mh; }  @override public void onbindviewholder(endpointlistrowholder endpointlistrowholder, int i) {          endpointlistrowholder.name.settext(endpointslist.get(i).get(name));         endpointlistrowholder.type.settext(endpointslist.get(i).get(type));         endpointlistrowholder.region.settext(endpointslist.get(i).get(region));         endpointlistrowholder.url.settext(endpointslist.get(i).get(publicurl)); }  @override public int getitemcount() {     return (null != endpointslist ? endpointslist.size() : 0); } }  class endpointlistrowholder extends recyclerview.viewholder { protected textview name; protected textview type; protected textview region; protected textview url;   public endpointlistrowholder(view view) {     super(view);     this.name = (textview) view.findviewbyid(r.id.name);     this.type = (textview) view.findviewbyid(r.id.type);     this.region = (textview) view.findviewbyid(r.id.region);     this.url = (textview) view.findviewbyid(r.id.url); }  } 

from debugger can see list correctly sent recyclerview.setadapter on gets null. seems it's 90% working, i'd appreciate lot make 100%. ideas?

the code above working, issue xml file