Callback interface method isn't working for me! It isn't able to recognize which view is clicked? Please have a look.

    public class MainActivity extends AppCompatActivity implements List_Fragment.onRecipeSelectedInterface {

        private final String TAG = getClass().getSimpleName();

        @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        List_Fragment savedFragment = (List_Fragment) getFragmentManager().findFragmentById(R.id.placeHolder);
        if(savedFragment==null){

            List_Fragment fragment = new List_Fragment();
            FragmentTransaction transaction = getFragmentManager().beginTransaction();
            transaction.add(R.id.placeHolder,fragment);
            transaction.commit();
        }

    }
    @Override
    public void onRecipeSelected(int index) {

        Log.d(TAG, "It's being clicked!");
        Toast.makeText(this, Recipes.names[index], Toast.LENGTH_SHORT).show();
    }
}

public class List_Fragment extends Fragment {

    public interface onRecipeSelectedInterface{
        void onRecipeSelected(int index);
    }
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.recipe_layout, container, false);
        onRecipeSelectedInterface listener = (onRecipeSelectedInterface) getActivity();
        RecyclerView recyclerView = view.findViewById(R.id.recyclerView);
        Adapter adapter = new Adapter(view.getContext(), listener);
        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        recyclerView.setAdapter(adapter);
        return view;
    }
}

public class Adapter extends RecyclerView.Adapter<Adapter.Holder>{


    private final List_Fragment.onRecipeSelectedInterface listener;
    private Context context;

    public Adapter(Context context, List_Fragment.onRecipeSelectedInterface listener) {
        this.listener = listener;
        this.context = context;
    }

    @NonNull
    @Override
    public Holder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_items,parent,false);

        return new Holder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull Holder holder, final int position) {

        ((Holder)holder).bindView(position);
    }

    @Override
    public int getItemCount() {
        return Recipes.names.length;
    }

    class Holder extends RecyclerView.ViewHolder implements View.OnClickListener{

        TextView textView;
        ImageView imageView;
        int index;
        void bindView(int position){
            textView.setText(Recipes.names[position]);
            imageView.setImageResource(Recipes.resourceIds[position]);
            index = position;
            Log.d("TAG", index + "");
        }
        Holder(View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.nameTextView);
            imageView = itemView.findViewById(R.id.imageView);
        }

        @Override
        public void onClick(View v) {

            listener.onRecipeSelected(index);
        }
    }
}