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My program imports contacts from some text file and put them into ExpandableListView.
The contacts list file has elements without groups, so some children will be without parents.
I think that I have only one way to use them – to put into special group, for example “No group” or “Others”. Is there any other method?
And ExpandableListView without parents would just be a ListView. So, the answer to your question is no. You will have to do what you suggest: create a group to hold all the ungrouped items.