Android ParseObject via nested interface example

public class RecipeListFragment extends Fragment implements AdapterView.OnItemClickListener { //Example with custom Class RecipeList
    private Map<String, Recipe> mListOfRecipies;
    private ListView mRecipeListView;
    private ArrayAdapter<String> mListOfRecipiesAdapter;
    private OnRecipeItemClickListener mOnRecipeItemClickListener;
    private Repository<Recipe> mFirebaseRepository;

    public RecipeListFragment() {
        // Required empty public constructor
    }

    public static RecipeListFragment newInstance() {
        return new RecipeListFragment();
    }

    private void init() {

        mListOfRecipiesAdapter = new ArrayAdapter<>(
                getContext(),
                android.R.layout.simple_list_item_1
        );
        mListOfRecipies = new HashMap<>();
        mFirebaseRepository = new FirebaseRepository<>(Recipe.class);
//todo to be moved in a repository class!
        mFirebaseRepository.getAll(recipes -> {
            for (Recipe recipe: recipes) {

                if (recipe.getDeleted()) { //instead of deleting from firebase
                    continue;
                }
                mListOfRecipiesAdapter.add(recipe.name);
                mListOfRecipies.put(recipe.name, recipe);
            }
        });
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.fragment_recipe_list, container, false);
        mRecipeListView = view.findViewById(R.id.lv_recipe_list);

        init();

        mRecipeListView.setAdapter(mListOfRecipiesAdapter);
        mRecipeListView.setOnItemClickListener(this);

        return view;
    }

    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
        //position which was clicked in the adapter
        String keyName = mListOfRecipiesAdapter.getItem(position);
        Recipe recipe = mListOfRecipies.get(keyName);
        mOnRecipeItemClickListener.onClick(recipe);
    }

    public void setOnRecipeItemClickListener(OnRecipeItemClickListener listener) {
        mOnRecipeItemClickListener = listener;
    }

    public interface OnRecipeItemClickListener {
        void onClick(Recipe recipe);
    }
}
/*
~~~
*/
//implements interface from RecipeListFragment and parse the Recipe recipe via Intent
public class ListAllFragment extends Fragment implements RecipeListFragment.OnRecipeItemClickListener {


    private RecipeListFragment mRecipeListFragment;

    public ListAllFragment() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_list_all, container, false);
        mRecipeListFragment = RecipeListFragment.newInstance();

        getFragmentManager()
                .beginTransaction()
                .replace(R.id.listAll_Fragment, mRecipeListFragment)
                .commit();

        mRecipeListFragment.setOnRecipeItemClickListener(this);
        return view;
    }

    public static ListAllFragment newInstance() {
        return new ListAllFragment();
    }

    @Override
    public void onClick(Recipe recipe) {
        Intent intent = new Intent(
                getContext(),
                RecipeDetailsActivity.class
                );
        intent.putExtra("NAME_Recipe", recipe); //need to get this extra in RecipeDetailsActivity
        intent.putExtra("navigate", "details");
        startActivity(intent);
    }
}
/*
~~~
*/

//get the intent from the previous class and uses the parsed recipe
public class RecipeDetailsActivity extends BaseDrawerActivity {
    public static final long IDENTIFIER = 2;
    private Fragment mDestinationFragment;
    private Recipe mRecipe;
    private Toolbar mToolbar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recipe_details);
        mToolbar = findViewById(R.id.drawer_toolbar);
        setSupportActionBar(mToolbar);

        Intent intent = getIntent();
        mRecipe = (Recipe) intent.getSerializableExtra("NAME_Recipe");
        String navigation = intent.getStringExtra("navigate");

        if (navigation.equals("details")) { //goes for DetailsRecipeFragment or RemoveThisRecipeFragment
            mDestinationFragment = RecipeDetailsFragment.newInstance(mRecipe);
        } else {
            mDestinationFragment = RemoveThisRecipeFragment.newInstance(mRecipe);
        }

        getFragmentManager()
                .beginTransaction()
                .replace(R.id.details_or_remove_recipe, mDestinationFragment)
                .commit();
    }

    @Override
    protected long getIdentifier() {
        return IDENTIFIER;
    }

    @Override
    protected Toolbar getDrawerToolbar() {
        return mToolbar;
    }
}