gistfile1.java

//Vistas para el Grupo
@Override
public View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {	   
  TextView txtView = genericView();
  String text=getGroup(groupPosition).toString();
  txtView.setText(text);
  return txtView;
}

//Vistas para el Child
@Override
public View getChildView(int groupPosition, int childPosition,		boolean isLastChild, View convertView, ViewGroup parent) {

 TextView txtView = genericView();
 String txt=getChild(groupPosition, childPosition).toString();
 txtView.setText(text);
 return txtView;
}