If the items don't have a title, are they really items or just paragraphs of a even longer text? Will the user be interested in only one of those items or she might read more in sequence?
You could invent some titles yourself (even if they were "Item 1", "Item 2", etc), but the problem with the ExpandableListView in this case is that due to the amount of content exhibited the user will lose track of what lies before and after the selected item. If you go for the "select an item" approach, perhaps it will be better to simply present the longer text in a different scrollable view, on top of the item list (and thus, when the user goes back there will be the list positioned in the item she previously read).
However, if the user might read more than one of those "items" in a sequence, a better approach might be presenting all the text in a single scrollable view with items displayed as paragraphs in a text editor, for example. A search box might help in fiding desired content.
In that last approach, if you want to allow the user to quickly glance through extracts of items (say, just a few characters from the beginning of each paragraph), you could create an advanced search that presents a list of extracts in a different view; the selection of a specific extract would simply position the cursor in the correct paragraph in the previous all-text view.