Android – Handle “Enter” in an EditText

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I am wondering if there is a way to
handle the user pressing Enter while
typing in an EditText, something like
the onSubmit HTML event.

Yes.

Also wondering if there is a way to
manipulate the virtual keyboard in
such a way that the “Done” button is
labeled something else (for example
“Go”) and performs a certain action
when clicked (again, like onSubmit).

Also yes.

You will want to look at the android:imeActionId and android:imeOptions attributes, plus the setOnEditorActionListener() method, all on TextView.

For changing the text of the “Done” button to a custom string, use: 

mEditText.setImeActionLabel("Custom text", KeyEvent.KEYCODE_ENTER);

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