42.4 Responding to Menu Item Selections
Once a menu has been implemented, the question arises as to how the application receives notification when the user makes menu item selections. All that an activity needs to do to receive menu selection notifications is to override the onOptionsItemSelected() method. Passed as an argument to this method is a reference to the selected menu item. The getItemId() method may then be called on the item to obtain the ID which may, in turn, be used to identify which item was selected. For example:
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_red:
// Red item was selected
return true;
...
