Q:

hiding menu on click

I am using NullField() in one of my screen so that the default focus should not be on any of the button .  but when i am clicking on the screen where no field is there , menu screen is being displayed.  i dont want that menu screen to be poped up tough it should open when i click menu button. 
Thanks alot

A:

override method. 
protected boolean navigationClick(int status, int time) {
            Field focus = UiApplication.getUiApplication().getActiveScreen()
                    .getLeafFieldWithFocus();
            if (focus instanceof NullField) {
                return true;
            }
            return super.navigationClick(status, time);
        }

Note:This code is only for giving you hint.