android - how to call RecyclerView in the first fragment of the navigation drawer? I've followed a tutorial by slidenerd but getting one error -

this java file of fragment wish insert recycler view. please dont worry package name deleted reasons.

import android.app.activity; import android.os.bundle; import android.support.v4.app.fragment; import android.support.v7.widget.linearlayoutmanager; import android.support.v7.widget.recyclerview; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup;  import java.util.arraylist; import java.util.list;  public class dashboard extends fragment {     private recyclerview recyclerview;     private recycleradapter adapter;      /**      * returns new instance of fragment given section number.      */     public static dashboard newinstance() {         dashboard fragment = new dashboard();         return fragment;     }      public dashboard () {     }      @override     public view oncreateview(layoutinflater inflater, viewgroup container,                              bundle savedinstancestate) {         view rootview = inflater.inflate(r.layout.activity_dashboard, container,                 false);         recyclerview = (recyclerview) rootview.findviewbyid(r.id.drawerlist);         adapter=new recycleradapter(getactivity().getdata());         recyclerview.setadapter(adapter);         recyclerview.setlayoutmanager(new linearlayoutmanager(getactivity()));         return rootview;     }      public static list<information> getdata(){         list<information> data=new arraylist<>();         string[] titles={"rooms occupied","roomsvacant","check-in","check-out","extensions","confirmations","cancellations"};         for(int i=0;i<titles.length;i++)         {             information current =new information();             current.title=titles[i];             data.add(current);         }         return data;     }      @override     public void onattach(activity activity) {         super.onattach(activity);     }       } 

this adapter class

import android.content.context; import android.support.v7.widget.recyclerview; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.textview;  import java.util.collections; import java.util.list;  /**  * created gowtham on 6/13/2015.  */ public class recycleradapter extends recyclerview.adapter<recycleradapter.myviewholder> {     private layoutinflater inflater;     list<information> data= collections.emptylist();     public recycleradapter(context context, list<information> data){         inflater=layoutinflater.from(context);         this.data=data;     }      @override     public myviewholder oncreateviewholder(viewgroup parent, int viewtype) {         view view=inflater.inflate(r.layout.custom_row, parent,false);         myviewholder holder=new myviewholder(view);         return holder;     }      @override     public void onbindviewholder(myviewholder holder, int position) {         information current=data.get(position);         holder.title.settext(current.title);      }      @override     public int getitemcount() {         return 0;     }      class myviewholder extends recyclerview.viewholder{         textview title;           public myviewholder(view itemview) {             super(itemview);             title= (textview) itemview.findviewbyid(r.id.viewtext);          }     } } 

this layout file of fragment in want use recycler view

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent">      <imageview         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:id="@+id/viewimage"         android:background="@drawable/ic_dashboard"         android:layout_gravity="center_vertical"         android:gravity="center"         />      <textview         android:layout_width="wrap_content"         android:layout_height="match_parent"         android:id="@+id/viewtext"         android:text="dummy text"         android:textstyle="bold"         android:layout_gravity="left"         android:gravity="center" /> </linearlayout> 

since i'm new stackoverflow don't have enough reputations add image. attach screenshot in comments below. please take @ know happening here exactly. thanks!

why call getactivity().getdata(), call getdata().

and in adapter class:

@override public int getitemcount() {     return data.size(); } 

it can't return zero, should return data size.