how to highlight selected item in expandable list as a header top of screen in android?

Question

public class SimpleExpandableListAdapterwithwebitem extends BaseExpandableListAdapter { private List> mGroupData; private int mExpandedGroupLayout; private int mCollapsedGroupLayout; private String[] mGroupFrom; private int[] mGroupTo;

private List<? extends List<? extends Map<String, ?>>> mChildData;
private int mChildLayout;
private int mLastChildLayout;
private String[] mChildFrom;
private int[] mChildTo;
int groupPositionitem;
int childhight;
int grouphight;
int child;

private LayoutInflater mInflater;


public SimpleExpandableListAdapterwithwebitem(Context context,
        List<? extends Map<String, ?>> groupData, int groupLayout,
        String[] groupFrom, int[] groupTo,
        List<? extends List<? extends Map<String, ?>>> childData,
        int childLayout, String[] childFrom, int[] childTo) {
    this(context, groupData, groupLayout, groupLayout, groupFrom, groupTo, childData,
            childLayout, childLayout, childFrom, childTo);
}

public SimpleExpandableListAdapterwithwebitem(Context context, List> groupData, int expandedGroupLayout, int collapsedGroupLayout, String[] groupFrom, int[] groupTo, List>> childData, int childLayout, String[] childFrom, int[] childTo) { this(context, groupData, expandedGroupLayout, collapsedGroupLayout, groupFrom, groupTo, childData, childLayout, childLayout, childFrom, childTo); } public SimpleExpandableListAdapterwithwebitem(Context context, List> groupData, int expandedGroupLayout, int collapsedGroupLayout, String[] groupFrom, int[] groupTo, List>> childData, int childLayout, int lastChildLayout, String[] childFrom, int[] childTo) { mGroupData = groupData; mExpandedGroupLayout = expandedGroupLayout; mCollapsedGroupLayout = collapsedGroupLayout; mGroupFrom = groupFrom; mGroupTo = groupTo;

   mChildData = childData;
   mChildLayout = childLayout;
   mLastChildLayout = lastChildLayout;
   mChildFrom = childFrom;
   mChildTo = childTo;

   mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

}

public Object getChild(int groupPosition, int childPosition) { return mChildData.get(groupPosition).get(childPosition); }

public long getChildId(int groupPosition, int childPosition) { return childPosition; }

public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { View v; groupPositionitem=groupPosition; //Log.v("groupPosition", "groupPosition"+groupPositionitem); if (convertView == null) { v = newChildView(isLastChild, parent); } else { v = convertView; } // mGroupData.setSelectionFromTop(groupPositionitem, 1); child=v.getHeight(); childhight=0+child; Log.v("mChildData", "mChildData"+v.getHeight()); bindView(v, mChildData.get(groupPosition).get(childPosition), mChildFrom, mChildTo,true); return v; }

public View newChildView(boolean isLastChild, ViewGroup parent) { return mInflater.inflate((isLastChild) ? mLastChildLayout : mChildLayout, parent, false); }

private void bindView(View view, Map data, String[] from, int[] to, boolean IsChild) { int len = to.length; Log.v("len", "len"+len); for (int i = 0; i < len; i++) { /* if(i/ / if(i == len - 2) { Log.v("len", "lenxxy"+ to[i] + " " + from[i] ); WebView wv=(WebView)view.findViewById(to[i]); if (wv != null) { wv.loadData((String)data.get(from[i]), "text/html", "UTF-8"); } } */ if (IsChild) { for (int k =0; k <=groupPositionitem; k++) { if(k == groupPositionitem) { // Log.v("groupPosition11", "groupPosition888"+i+len); // Log.v("len", "Child"+ to[i] + " " + from[i]); WebView wv=(WebView)view.findViewById(to[i]); // TextView tv=(TextView)view.findViewById(to[i]); // wv.setBackgroundColor(0);
//wv.getSettings().setJavaScriptEnabled(true); // wv.addJavascriptInterface(new DemoJavaScriptInterface(), "demo"); if (wv != null) { if(groupPositionitem==3) { Log.v("groupPosition333", "groupPosition3333333333333333"); startItem(); }else { //Log.v("childdata",+childhight+ "childata"+grouphight); //scroll.scrollTo(0,childhight+grouphight); wv.loadDataWithBaseURL("fake://not/needed",(String)data.get(from[i]), "text/html", "UTF-8",""); Log.v("groupPosition333", "groupPosition3333333333333333"+wv.getScrollY()); } } } } }

       else
       {
           if(i == len - 1)
           {
                  TextView v = (TextView)view.findViewById(to[i]);
                  if (v != null) 
                  {
                      v.setText((String)data.get(from[i]));

                  }

           }  

       }

   }

}

public int getChildrenCount(int groupPosition) { return mChildData.get(groupPosition).size(); }

public Object getGroup(int groupPosition) { return mGroupData.get(groupPosition); }

public int getGroupCount() { return mGroupData.size(); }

public long getGroupId(int groupPosition) { return groupPosition; }

public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { View v; if (convertView == null) { v = newGroupView(isExpanded, parent); } else { v = convertView; } grouphight=v.getHeight(); Log.v("mGroupData", "mGroupData"+v.getHeight()); bindView(v, mGroupData.get(groupPosition), mGroupFrom, mGroupTo,false); return v; }

public View newGroupView(boolean isExpanded, ViewGroup parent) { return mInflater.inflate((isExpanded) ? mExpandedGroupLayout : mCollapsedGroupLayout, parent, false); }

public boolean isChildSelectable(int groupPosition, int childPosition) { return true; }

public boolean hasStableIds() { return true; }

}