Android solves the problem that nested fragment cannot receive Oncreateoptionsmenu events _android

Objective

Nested level Two fragment cannot receive Oncreateoptionsmenu event, set Sethasoptionsmenu also no use.

Body

Supplementary Note:

If you manually call level two fragment through the cache fragment, there may be some puzzling problems, such as more menu not displayed.

Solution:

Add menu to the first level fragment, you can manually call level two of this method in the first level onoptionsitemselected to handle related events.

Sample code:

 @Override public
  void Oncreateoptionsmenu (Menu menu, Menuinflater inflater) {
    switch (getselectedposition ()) { Case
    1:
      inflater.inflate (r.menu.menu1, menu);
      break;
    Case 2:
      inflater.inflate (R.MENU.MENU2, menu);
      break;
    Case 0:
    default:
      inflater.inflate (R.MENU.MENU3, menu);
      break;
    }
  }

  @Override Public
  Boolean onoptionsitemselected (MenuItem item) {
    Fragment Fragment = getfragmentbyposition ( Getselectedposition ());
    if (fragment!= null)
      fragment.onoptionsitemselected (item);
    return super.onoptionsitemselected (item);
  }

Code Description:

The sample code is a level fragment,getfragmentbyposition that returns a level two fragment.

That's what Android solves fragment's inability to receive oncreateoptionsmenu events, hoping to help friends of Android developers solve similar problems.