Create a search view in your fragment

SearchViewFragment.java

public void onCreateView (LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
                               
    // enable options menus 
    setHasOptionsMenu(true); 
}

public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    super.onCreateOptionsMenu(menu, inflater);
    
    // add menu item 
    MenuItem item = menu.add("searchOpt");
    item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
    SearchView searchView = new SearchView(getActivity());
    
    // setup search view listener 
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String s) {
                doSearch(s);
            }
            
            @Override
            public boolean onQueryTextChange(String newText) {
                return true;
            }
      });
}