What is the difference? public boolean onKeyDown (int keyCode, KeyEvent event) The parameters are keyCode,the button,the user pressed,but what is that KeyEvent?
3 Answers
4
votes
Read the docs
Object used to report key and button events. Each key press is described by a sequence of key events. A key press starts with a key event with ACTION_DOWN. If the key is held sufficiently long that it repeats, then the initial down is followed additional key events with ACTION_DOWN and a non-zero value for getRepeatCount(). The last key event is a ACTION_UP for the key up. If the key press is canceled, the key up event will have the FLAG_CANCELED flag set.
6
votes
KeyEvent: Each key press is described by a sequence of key events, Key events are generally accompanied by a key code.
KeyCode: is a constant that define the event, and is defined inside KeyEvent Class.
For example if you want to detect the KeyEvent "ENTER" :
@Override
public boolean onKeyDown( int keyCode, KeyEvent event ) {
if( keyCode == KeyEvent.KEYCODE_ENTER) {
//Do something...
return true;
}
return super.onKeyDown( keyCode, event );
}
