How to ArrayAdapter mixed add item?

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http://stackoverflow.com – I have a ArrayAdapter. I want to item with mixed. For example; ArrayAdapter<String> Adapter = new ArrayAdapter<String>(); Adapter.add("Table"); Adapter.add("Desk"); Adapter.add("Pen"); Adapter.add("Computer"); Adapter.add("Mouse"); Adapter.add("Book"); I am adding items my ArrayAdapter. But I want to after adding, I add other item on under "Pen" item. For example; Adapter.add("New Item"); But this item is last. I want to this item is adding under "Pen" item. How can I do ? (HowTos)