android- Expandable List not working inside viewpager fragment -

i want have expandable list inside viewpager . viewpager child fragment . i've used tutorial : http://www.androidhive.info/2013/07/android-expandable-list-view-tutorial/

this fragment code :

import java.util.arraylist; import java.util.hashmap; import java.util.list;  import android.os.bundle; import android.support.v4.app.fragment; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.expandablelistview;  public class resturant_menu extends fragment { expandablelistadapter listadapter; expandablelistview explistview; list<string> listdataheader; hashmap<string, list<string>> listdatachild; view v;   @override public view oncreateview(layoutinflater inflater, viewgroup container,bundle savedinstancestate) {     v = inflater.inflate(r.layout.resturantmenu, container, false);     return v; } @override public void onactivitycreated(bundle savedinstancestate) {     super.onactivitycreated(savedinstancestate);       // listview    explistview = (expandablelistview) v.findviewbyid(r.id.expandablelistview1);     // preparing list data    preparelistdata();     listadapter = new expandablelistadapter(getactivity(), listdataheader, listdatachild);     // setting list adapter    explistview.setadapter(listadapter);  }  private void preparelistdata() {         listdataheader = new arraylist<string>();         listdatachild = new hashmap<string, list<string>>();          // adding child data         listdataheader.add("top 250");         listdataheader.add("now showing");         listdataheader.add("coming soon..");          // adding child data         list<string> top250 = new arraylist<string>();         top250.add("the shawshank redemption");         top250.add("the godfather");         top250.add("the godfather: part ii");         top250.add("pulp fiction");         top250.add("the good, bad , ugly");         top250.add("the dark knight");         top250.add("12 angry men");          list<string> nowshowing = new arraylist<string>();         nowshowing.add("the conjuring");         nowshowing.add("despicable me 2");         nowshowing.add("turbo");         nowshowing.add("grown ups 2");         nowshowing.add("red 2");         nowshowing.add("the wolverine");          list<string> comingsoon = new arraylist<string>();         comingsoon.add("2 guns");         comingsoon.add("the smurfs 2");         comingsoon.add("the spectacular now");         comingsoon.add("the canyons");         comingsoon.add("europa report");          listdatachild.put(listdataheader.get(0), top250); // header, child data         listdatachild.put(listdataheader.get(1), nowshowing);         listdatachild.put(listdataheader.get(2), comingsoon);     } 

}

this expandablelistadapter:

import java.util.hashmap; import java.util.list;  import android.content.context; import android.graphics.typeface; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.baseexpandablelistadapter; import android.widget.textview; 

public class expandablelistadapter extends baseexpandablelistadapter {

private context _context; private list<string> _listdataheader; // header titles // child data in format of header title, child title private hashmap<string, list<string>> _listdatachild;  public expandablelistadapter(context context, list<string> listdataheader,         hashmap<string, list<string>> listchilddata) {     this._context = context;     this._listdataheader = listdataheader;     this._listdatachild = listchilddata; }  @override public object getchild(int groupposition, int childposititon) {     return this._listdatachild.get(this._listdataheader.get(groupposition))             .get(childposititon); }  @override public long getchildid(int groupposition, int childposition) {     return childposition; }  @override public view getchildview(int groupposition, final int childposition,         boolean islastchild, view convertview, viewgroup parent) {      final string childtext = (string) getchild(groupposition, childposition);      if (convertview == null) {         layoutinflater infalinflater = (layoutinflater) this._context                 .getsystemservice(context.layout_inflater_service);         convertview = infalinflater.inflate(r.layout.list_item, null);     }      textview txtlistchild = (textview) convertview             .findviewbyid(r.id.lbllistitem);      txtlistchild.settext(childtext);     return convertview; }  @override public int getchildrencount(int groupposition) {     return this._listdatachild.get(this._listdataheader.get(groupposition))             .size(); }  @override public object getgroup(int groupposition) {     return this._listdataheader.get(groupposition); }  @override public int getgroupcount() {     return this._listdataheader.size(); }  @override public long getgroupid(int groupposition) {     return groupposition; }  @override public view getgroupview(int groupposition, boolean isexpanded,         view convertview, viewgroup parent) {     string headertitle = (string) getgroup(groupposition);     if (convertview == null) {         layoutinflater infalinflater = (layoutinflater) this._context                 .getsystemservice(context.layout_inflater_service);         convertview = infalinflater.inflate(r.layout.list_group, null);     }      textview lbllistheader = (textview) convertview             .findviewbyid(r.id.lbllistheader);     lbllistheader.settypeface(null, typeface.bold);     lbllistheader.settext(headertitle);      return convertview; }  @override public boolean hasstableids() {     return false; }  @override public boolean ischildselectable(int groupposition, int childposition) {     return true; } 

}

this activity :

public class showit extends fragmentactivity { private pagerslidingtabstrip tabs; private viewpager pager; private mypageradapter adapter;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.showit);      tabs = (pagerslidingtabstrip) findviewbyid(r.id.tabs);     pager = (viewpager) findviewbyid(r.id.pager);     adapter = new mypageradapter(getsupportfragmentmanager());     pager.setadapter(adapter);     final int pagemargin = (int) typedvalue.applydimension(typedvalue.complex_unit_dip, 4, getresources().getdisplaymetrics());     pager.setpagemargin(pagemargin);     tabs.setviewpager(pager); }  public class mypageradapter extends fragmentpageradapter {     private final string[] titles =  getresources().getstringarray(r.array.tabresturan);;      public mypageradapter(fragmentmanager fm) {         super(fm);     }      @override     public charsequence getpagetitle(int position) {         return titles[position];     }      @override     public int getcount() {         return titles.length;     }      @override     public fragment getitem(int arg0) {         fragment fragment=null;         fragment=new resturant_menu();         return fragment;     }  } 

this layout :

<?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"     android:orientation="vertical" >      <expandablelistview         android:id="@+id/expandablelistview1"         android:layout_width="match_parent"         android:layout_height="wrap_content"          >     </expandablelistview> 

this :

instead of :

i no error , i've added classes , layout that's been said .

could me solve ? you

try setting height of expandablelistview match parent. think should trick