question: @ Override public boolean onKeyEvent ( KeyEvent event ) { if ( ! mMatchKeyCombo || mListeners . isEmpty ( ) ) { return false ; } switch ( event . getAction ( ) ) { case KeyEvent . ACTION_DOWN : return onKeyDown ( event ) ; case KeyEvent . ACTION_MULTIPLE : return mHasPartialMatch ; case KeyEvent . ACTION_UP : return onKeyUp ( ) ; default : return false ; } }
target:  Handles incoming key events. May intercept keys if the user seems to be performing a key combo.