Check that the last key entered was enter... and replace with blank character. This can be used in an android TextWatcher, and called in afterTextChanged to stop a user pressing enter or handle the case that someone does. This was implemented in an attempt to limit the amount of enters someone could press when entering text in a multiline editex…

check_for_newline_character

    private void checkLastKeyWasEnter(final Editable pSequence) {
        if (pSequence.length() > 0 && pSequence.charAt(pSequence.length() - 1) == '\n') {
            pSequence.replace(pSequence.length() - 1, pSequence.length(), "");
        }
    }