I think I've tried every combination, but I can't get the alpha keyboard to show the return key. It's always a "Done" button, which is not useful. On a Nexus 7 (4.1), it's worse, and shows a stupid smiley button along with the Done button, which makes no sense for my application. It's fine to have a Done button as long as I have a return button. Here's one of many options I've tried:
<AutoCompleteTextView
android:id="@+id/annotate_edit"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="15dp"
android:layout_marginLeft="60dp"
android:layout_marginRight="60dp"
android:layout_marginTop="15dp"
android:completionThreshold="1"
android:inputType="textCapSentences|textImeMultiLine"
android:imeOptions="actionDone"
android:lines="1"
android:maxLength="18"
android:textSize="30px" />
I've tried with and without the imeOpitons line, and various inputType options including removing it. There are options to make it a search button (not helpful), but nothing listed to make it a return key. I've also tried with "lines=2", which did not fix it. Any other ideas?