Android Studio, RecyclerView crashes my app on start up -

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i battling android recyclerviewer. followed tutorials , read posts here on stackoverflow, still not coming right.

mainactivity

public class mainactivity extends actionbaractivity { recyclerview myrecyclerview; myadapter adapter; @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      myrecyclerview = (recyclerview)findviewbyid(r.id.myrecycleview);     adapter = new myadapter(mainactivity.this, getdata());     final linearlayoutmanager layoutmanager = new linearlayoutmanager(mainactivity.this);     layoutmanager.setorientation(linearlayoutmanager.vertical);     myrecyclerview.setlayoutmanager(layoutmanager);     myrecyclerview.setadapter(adapter);     myrecyclerview.setitemanimator(new defaultitemanimator());      // } //the dataset public static list<mydatamodel> getdata() {     list<mydatamodel> mydata = new arraylist<>();     string[] posttext = {"ibm", "apple", "google", "microsoft"};     int[] postimgurl = {r.drawable.google, r.drawable.ibm, r.drawable.microsoft, r.drawable.apple};      for(int x=0; x<posttext.length && x<postimgurl.length; x++)     {         mydatamodel mymodel = new mydatamodel();         mymodel.postimgurl = postimgurl[x];         mymodel.posttext = posttext[x];         mydata.add(mymodel);     }     return mydata; }

myadapter

public class myadapter extends recyclerview.adapter<myadapter.viewholder>{  list<mydatamodel> mydataset; private layoutinflater inflater; public myadapter(context cont, list<mydatamodel> mydataset) {     inflater = layoutinflater.from(cont); }  public myadapter.viewholder oncreateviewholder(viewgroup parent, int viewtype) {     //get itemlayoutview xml     view itemlayoutview = inflater.inflate(r.layout.my_items_row, parent, false);     //pass viewholder     viewholder myviewholder = new viewholder(itemlayoutview);     return myviewholder; }  public void onbindviewholder(viewholder viewholder, int position) {     viewholder.posttext.settext(mydataset.get(position).posttext);     viewholder.postimage.setimageresource(mydataset.get(position).postimgurl); }  public int getitemcount() {    return mydataset.size(); }  public static class viewholder extends recyclerview.viewholder {     public textview posttext;     public imageview postimage;      public viewholder(view v)     {         super(v);         posttext = (textview)v.findviewbyid(r.id.myposttext);         postimage = (imageview)v.findviewbyid(r.id.mypostimage);     }  } }

my model data

public class mydatamodel { string posttext; int postimgurl;  }

i testing on real device through android studio, other apps i testing fine. please thank you.

you didn't initialize mydataset inside myadapter class


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