android - Show and Hide action bar buttons outside onPrepareOptionsMenu -

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in overrided public boolean onprepareoptionsmenu(menu menu) can hide or show menu buttons adding true or false in way

menu.finditem(r.id.my_action_button).setvisible(true);

but need same operation when different method inside activity called,

how this?

call:

    activity.invalidateoptionsmenu();

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