java - Get data in my RecyclerView -

i started work retrofit. in application have 1 recyclerview 2 viewholder's, trying data models, in logs coming type:

@override     public void onresponse(call<dropdown> call, response<dropdown> response) {         dropdown jsonresponse = response.body();         log.d("type",jsonresponse.getform().getmgroupss().get(1).getmcontrols().get(2).gettitle()+"");         adapter = new dataadapter(response.body());         recyclerview.setadapter(adapter);     } 

how can display type in recyclerview, if there few types? next message:

09-13 09:20:40.958 2798-2798/com.random.secondproject e/recyclerview: no adapter attached; skipping layout

dataadapter:

public class dataadapter extends recyclerview.adapter<recyclerview.viewholder> {  public static final string type_textview = "0"; public static final string type_editview = "1"; private dropdown mlist;  public dataadapter(dropdown list) {     this.mlist = list; }  @override public recyclerview.viewholder oncreateviewholder(viewgroup parent, int viewtype) {     view view;     switch (viewtype) {         case 0:             view = layoutinflater.from(parent.getcontext()).inflate(r.layout.text_numeric, parent, false);             return new numericviewholder(view);         case 1:             view = layoutinflater.from(parent.getcontext()).inflate(r.layout.drop_down_options, parent, false);             return new dropdownviewholder(view);     }     return null; }  @override public void onbindviewholder(recyclerview.viewholder holder, int position) {     dropdown object = mlist.get(position);     if (object != null) {         switch (object.gettitle()){             case type_textview:                 ((numericviewholder) holder).title.settext(string.valueof(object.gettitle()));                 break;             case type_editview:                 ((dropdownviewholder) holder).title_options.settext(string.valueof(object.gettitle()));                 break;         }     } }  @override public int getitemcount() {     if (mlist == null)         return 0;     return mlist.size(); }  @override public int getitemviewtype(int position) {     dropdown object = mlist.get(position);         if (object.gettitle().equals("drop_down_options"))         return 0;     else return 1; }  public class numericviewholder extends recyclerview.viewholder {      private  textview title;      public numericviewholder(view itemview) {         super(itemview);         title = (textview) itemview.findviewbyid(r.id.title);     } }  public class dropdownviewholder extends recyclerview.viewholder {      private edittext title_options;      public dropdownviewholder(view itemview) {         super(itemview);         title_options = (edittext) itemview.findviewbyid(r.id.title_options);     } 

as can see, i'm going take 2 types (textview , edittext) write few ways model(array think). example, wrote in log.d .

everything seem ok me in adapter. try call recyclerview.invalidate(). idea draw recyclerview before calling onresponse method. thus, have empty view. invalidate() method try redraw view.