Android - ExpandableListView isn't showing the groupIndicator icon -

i have expandablelistview in xml , i'm setting adapter custom baseexpandablelistadapter. xml:

<expandablelistview       android:id="@+id/expanlist_estatisticaarsenal"      android:divider="@null"      android:layout_width="fill_parent"      android:layout_height="fill_parent"      android:transcriptmode="alwaysscroll"      android:cachecolorhint="#000000"      android:listselector="@android:color/transparent"      android:visibility="gone">           </expandablelistview> 

android:visibility="gone" because make visible after stuff

adapter custom class:

public class adapter_expanestatistica extends baseexpandablelistadapter {     private context c;     private list<blocoarsenal> listblocos;     public adapter_expanestatistica(context ctx, list<blocoarsenal> listblocos)     {         c = ctx;         listblocos = listblocos;     }      @override     public view getchildview(int groupposition, int childposition, boolean islastchild, view convertview, viewgroup parent)     {         // todo auto-generated method stub         layoutinflater inflater = (layoutinflater) c.getsystemservice(context.layout_inflater_service);         view expdanableview = inflater.inflate(r.layout.estatistica_expanlist_child, null);          /* here populate tablelayout exists in expdanableview info */          return expdanableview;     }      @override     public int getchildrencount(int groupposition) {         // todo auto-generated method stub         return 1;     }      @override     public int getgroupcount() {         // todo auto-generated method stub         return listblocos.size();     }      @override     public long getgroupid(int groupposition) {         // todo auto-generated method stub         return groupposition;     }      @override     public view getgroupview(int groupposition, boolean isexpanded, view convertview, viewgroup parent)     {         // todo auto-generated method stub         layoutinflater inflater = (layoutinflater) c.getsystemservice(context.layout_inflater_service);         view expdanableview = inflater.inflate(r.layout.estatistica_expanlist_parent, null);                 textview txt = (textview) expdanableview.findviewbyid(r.id.txtnomebloco);         txt.settext(listblocos.get(groupposition).getnome());         return expdanableview;     }      @override     public boolean hasstableids() {         // todo auto-generated method stub         return true;     }      @override     public boolean ischildselectable(int arg0, int arg1) {         // todo auto-generated method stub         return false;     } 

xml childview:

    <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:orientation="vertical" >                     <tablelayout                  android:layout_width="match_parent"                 android:layout_height="match_parent"                 android:id="@+id/tblestasticaarsenal" >                         </tablelayout>       </linearlayout> 

xml parentview:

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:orientation="vertical" >      <textview         android:id="@+id/txtnomebloco"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_marginleft="3dp"         android:layout_marginright="3dp"         android:layout_margintop="3dp"         android:textcolor="#5e302a"         android:text="nome bloco"         android:textappearance="?android:attr/textappearancesmall" />     </linearlayout> 

when set adapter of expanlistview , change visibility visible, goes ok, doesn't show groupindicator icon. can me?

in method getgroupview try use layout - android.r.layout.simple_expandable_list_item_2

as result, code this:

 @override  public view getgroupview(int groupposition, boolean isexpanded, view theconvertview, viewgroup parent)   {     view row = theconvertview;     textview textview;      if(theconvertview == null) {         row = inflater.inflate(android.r.layout.simple_expandable_list_item_2, null);         textview = (textview)row.findviewbyid(android.r.id.text2);         row.settag(textview);     } else {         textview = (textview)theconvertview.gettag();     }      //textview.settext();  //todo set group       return row; } 

if can see method diferrent your. used viewholderpatter, read (this code work better).

i checked it, in group mas indicator.

hope, you.