android - Recycleview contains child fragments -

hi guys want example of recycle view contains child fragments
, layout manager gridlayoutmanager
made 1 add in first cell , ignores others

public class simplefragment extends fragment {

private recyclerview mrecyclerview; private myadapter madapter; private recyclerview.layoutmanager mlayoutmanager;  @nullable @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) {     return inflater.inflate(r.layout.fragment_simple, container, false); }  @override public void onviewcreated(view view, @nullable bundle savedinstancestate) {     super.onviewcreated(view, savedinstancestate);     sethasoptionsmenu(true);     mrecyclerview = (recyclerview) view.findviewbyid(r.id.my_recycler_view);      mlayoutmanager = new gridlayoutmanager(getactivity(), 4);     mrecyclerview.setlayoutmanager(mlayoutmanager);       list<card> cards = new arraylist<>();     cards.add(new card(size.large, new fragmenthalf()));     cards.add(new card(size.large, new fragmenthalf()));     cards.add(new card(size.large, new fragmenthalf()));     cards.add(new card(size.large, new fragmenthalf()));      cards.add(new card(size.large, new fragmenthalf()));     cards.add(new card(size.large, new fragmenthalf()));     cards.add(new card(size.large, new fragmenthalf()));     cards.add(new card(size.large, new fragmenthalf()));       cards.add(new card(size.large, new fragmenthalf()));     cards.add(new card(size.large, new fragmenthalf()));     cards.add(new card(size.large, new fragmenthalf()));     cards.add(new card(size.large, new fragmenthalf()));      cards.add(new card(size.large, new fragmenthalf()));     cards.add(new card(size.large, new fragmenthalf()));     cards.add(new card(size.large, new fragmenthalf()));     cards.add(new card(size.large, new fragmenthalf()));      cards.add(new card(size.small, new fragmenthalf()));     cards.add(new card(size.small, new fragmenthalf()));      cards.add(new card(size.small, new fragmenthalf()));     cards.add(new card(size.small, new fragmenthalf()));      madapter = new myadapter(cards, mrecyclerview);     mrecyclerview.setadapter(madapter); }  @override public void oncreateoptionsmenu(menu menu, menuinflater inflater) {     super.oncreateoptionsmenu(menu, inflater);     inflater.inflate(r.menu.menu_sample, menu); }  @override public boolean onoptionsitemselected(menuitem item) {      madapter.additem(5, new card(size.large, new fragmenthalf()));      return super.onoptionsitemselected(item); }  public class myadapter extends recyclerview.adapter<myadapter.viewholder> {     private list<card> mdataset;     private recyclerview recyclerview;     private hashmap<fragment, integer> hashmapid = new hashmap<>();      // provide reference views each data item     // complex data items may need more 1 view per item, ,     // provide access views data item in view holder     public class viewholder extends recyclerview.viewholder {         // each data item string in case         public framelayout view;         private int id;          public viewholder(framelayout v) {             super(v);             this.view = v;             id = v.getid();         }     }      // provide suitable constructor (depends on kind of dataset)     public myadapter(final list<card> mydataset, recyclerview recyclerview) {         mdataset = mydataset;         this.recyclerview = recyclerview;         gridlayoutmanager manager = (gridlayoutmanager) recyclerview.getlayoutmanager();          manager.setspansizelookup(new gridlayoutmanager.spansizelookup() {             @override             public int getspansize(int position) {                 return getitem(position).size == size.large ? 2 : 1;             }         });       }      public card getitem(int pos) {         return mdataset.get(pos);     }      public void additem(int position, card card) {         if (position == -1)             mdataset.add(card);         else             mdataset.add(position, card);         notifyiteminserted(position);     }      // create new views (invoked layout manager)     @override     public myadapter.viewholder oncreateviewholder(viewgroup parent,                                                    int viewtype) {          framelayout v = (framelayout) layoutinflater.from(getactivity()).inflate(r.layout.my_text_view, parent, false);         viewholder vh = new viewholder(v);         return vh;     }      // replace contents of view (invoked layout manager)     @override     public void onbindviewholder(viewholder holder, int position) {         // - element dataset @ position         // - replace contents of view element          card card = mdataset.get(position);          getchildfragmentmanager().begintransaction().replace(holder.view.getid(), card.fragment).commit();      }      // return size of dataset (invoked layout manager)     @override     public int getitemcount() {         return mdataset.size();     } }  enum size {     large,     small }  class card {     public size size;     public fragment fragment;     public int id;      public card(size size, fragment fragment) {         this.size = size;         this.fragment = fragment;         id = view.generateviewid();     } } 

}

i solve mrecyclerview.setitemviewcachesize(cards.size());

and @ method @override public myadapter.viewholder oncreateviewholder(viewgroup parent, int viewtype) {

        framelayout v = (framelayout) layoutinflater.from(getactivity()).inflate(r.layout.my_text_view, parent, false);         v.setid(view.generateviewid());<-----added         viewholder vh = new viewholder(v);         return vh;     }