title: Handle keyevent in custom AutoCompleteTextview
body: <p>I was creating <code>CustomAutoCompleteTextView extends AppCompatAutoCompleteTextView</code> and i want to handle key event (any button press) but i don't want to use <code>Textwatcher</code> (etc <code>addTextChangedListener(new TextWatcher()</code>). 
  How i can to detect key event by another method ? like (<code>onKeydown</code>) , but for all buttons. is it possible ?</p>