gistfile1.java

PhotographersViewModel model = ViewModelProviders.of(this).get(PhotographersViewModel.class);
 
        model.getPhotographer().observe(this, new Observer<List<Photographer>>() {
            @Override
            public void onChanged(@Nullable List<Photographer> photographerList) {
                adapter = new PhotographerAdapter(MainActivity.this, photographerList);
                recyclerView.setAdapter(adapter);
            }
        });