Updating ExpandableListView with notifyDataSetChanged()

Question

First a short overview of my code, i hope its understandable:

• I have a class called ToDoElement with a few variables.
• I

Answer 1

Call super in your registerDataSetObserver meke notifyDataSetChanged() working well.

@Override
public void registerDataSetObserver(DataSetObserver observer) {
    super.registerDataSetObserver(observer);    
}