android - 菜单在片段的 onCreateOptionsMenu 多次膨胀调用

Question

我使用片段，当我切换到嵌套片段时，public void onCreateOptionsMenu(Menu menu, MenuInflater inflater)当我到达那个嵌套片段时，它实现了我的菜单膨胀次数。我怎样才能避免这种情况？我还使用方法实现了 Fragment 的构造函数：

setRetainInstance(true);
setHasOptionsMenu(true);

当我尝试将简单的解决方案实现为：

 @Override
 public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
     // TODO Add your menu entries here
   if(!isInflated)
         {
         inflater.inflate(R.menu.contacts_archive_menu, menu);
         isInflated = true;
         }
         super.onCreateOptionsMenu(menu, inflater);

 }

但屏幕旋转后我的菜单没有膨胀。

Answer 1

我通过在 ionflating 之前清除菜单来解决它：

     @Override
     public void   onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
          menu.clear();
          inflater.inflate(R.menu.call_menu, menu);
          super.onCreateOptionsMenu(menu, inflater);

     }

Answer 2

Just check the count of menu items. Meaning menu.size()==0 ,no menu items are present,then inflate with layout menu,else don't inflate at all.

 @Override
 public void   onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
      if (menu.size() == 0)
      inflater.inflate(R.menu.call_menu, menu);
      super.onCreateOptionsMenu(menu, inflater);

 }

Answer 3

更换前使用。

 fragment = new EditMyProfile();
 FragmentTransaction fragmentTransactionEditProfile =getSupportFragmentManager().beginTransaction();
 getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
 fragmentTransactionEditProfile.replace(R.id.frame, fragment);
 fragmentTransactionEditProfile.commit();