Android - How to hide menu option for current fragment

First get the item you want to remove :

MenuItem item = menu.findItem(R.id.your_action);

then set it's Visibility false :

item.setVisible(false);

and if the problem is in getting the menu (as it's not in the fragment), you can easily get a context from the activity that contains the menu and get the menu by it.

Inside your fragment you will have to use setHasOptionsMenu(true); in order to access options menu from within your fragment.

Code (inside your second fragment where you wanna hide the item):

@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setHasOptionsMenu(true);
}

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
  // TODO your code to hide item here
  super.onCreateOptionsMenu(menu, inflater);     
}

Similarly, for your fragment where you want to show that MenuItem you can do the similar thing.

In the fragment where you want to hide the Item

@Override
public void onPrepareOptionsMenu(Menu menu) {
    MenuItem item=menu.findItem(R.id.action_search);
    item.setVisible(false);

and in onCreate() of your fragment

 setHasOptionsMenu(true);