Hide group with no child - ExpandableListView

Question

I want to hide the whole group from ExpandableListView if it has no child(s). I've tried to use this in the public View getGroupView :

if (getChildrenCount(groupPosition) == 0) {
    convertView.setVisibility(View.INVISIBLE);
    lblListHeader.setVisibility(View.INVISIBLE);
} else {
    convertView.setVisibility(View.VISIBLE);
    lblListHeader.setVisibility(View.VISIBLE);
}

But that is not working I still see the indicator (the text is removed) and a empty space.

Also I've tried this:

if (getChildrenCount(groupPosition) == 0) {
    convertView = layoutInflater.inflate(R.layout.blank_layout, null);
}

That's working but when I try to open another group I get a java.lang.NullPointerException .

Is it possible to hide group(s) from ExpandableListView if it has no child(s)?

Answer 1

您必须在适配器中实现datamodel以便它允许删除，然后在删除它之后，在适配器上设置invoke notifyDataSetChanged（）。