How can I set the visibility of an ActionBar item in different fragment

Question

I'm looking for a way to set the visibility of a MenuItem inflated in my MainActivity depending on which Fragment I am on.

For information: I'm using actionBarSherlock, zxing, and some google services.

The application was built with a Navigation drawer(With abs), also I manipulate the FragmentStack in such way I everytime I switch to another Fragment when I press the touch back I come back in my Main Fragment.

Here my menu:

<menu xmlns:android="http://schemas.android.com/apk/res/android" >
   <item android:id="@+id/button_generator" android:title="GENERER" android:icon="@drawable/ic_drawer"></item>
</menu>

Here is where I inflate the menu:

 @Override
public boolean onCreateOptionsMenu(Menu menu) {
    Log.d(TAG, "================= onCreateOptionsMenu ================= fragSt: " + fragmentStatus);
    this.getSherlock().getMenuInflater().inflate(R.menu.main, menu);

    mGenQrFromContacts = menu.findItem(R.id.button_generator);


    return true;
}

I've tried the solution purposed here, but ain't work in my case.

Answer 1

You should try this in your Fragment:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    // ...  
    // call the method setHasOptionsMenu, to have access to the menu from your fragment
    setHasOptionsMenu(true);

    //...
}

// the create options menu with a MenuInflater to have the menu from your fragment
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    menu.findItem(R.id.button_generator).setVisible(true);
    super.onCreateOptionsMenu(menu, inflater);
}  

And this, in your Activity:

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getSupportMenuInflater().inflate(R.menu.my_layout, menu);
    menu.findItem(R.id.button_generator).setVisible(false);
    return true;
}

Hope this helps.