protected void onCreate()

in app/src/main/java/com/google/firebase/example/fireeats/RestaurantDetailActivity.java [81:134]
40 lines of code
3 McCabe index (conditional complexity)

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_restaurant_detail);
        
        mImageView = findViewById(R.id.restaurant_image);
        mNameView = findViewById(R.id.restaurant_name);
        mRatingIndicator = findViewById(R.id.restaurant_rating);
        mNumRatingsView = findViewById(R.id.restaurant_num_ratings);
        mCityView = findViewById(R.id.restaurant_city);
        mCategoryView = findViewById(R.id.restaurant_category);
        mPriceView = findViewById(R.id.restaurant_price);
        mEmptyView = findViewById(R.id.view_empty_ratings);
        mRatingsRecycler = findViewById(R.id.recycler_ratings);

        findViewById(R.id.restaurant_button_back).setOnClickListener(this);
        findViewById(R.id.fab_show_rating_dialog).setOnClickListener(this);

        // Get restaurant ID from extras
        String restaurantId = getIntent().getExtras().getString(KEY_RESTAURANT_ID);
        if (restaurantId == null) {
            throw new IllegalArgumentException("Must pass extra " + KEY_RESTAURANT_ID);
        }

        // Initialize Firestore
        mFirestore = FirebaseUtil.getFirestore();

        // Get reference to the restaurant
        mRestaurantRef = mFirestore.collection("restaurants").document(restaurantId);

        // Get ratings
        Query ratingsQuery = mRestaurantRef
                .collection("ratings")
                .orderBy("timestamp", Query.Direction.DESCENDING)
                .limit(50);

        // RecyclerView
        mRatingAdapter = new RatingAdapter(ratingsQuery) {
            @Override
            protected void onDataChanged() {
                if (getItemCount() == 0) {
                    mRatingsRecycler.setVisibility(View.GONE);
                    mEmptyView.setVisibility(View.VISIBLE);
                } else {
                    mRatingsRecycler.setVisibility(View.VISIBLE);
                    mEmptyView.setVisibility(View.GONE);
                }
            }
        };

        mRatingsRecycler.setLayoutManager(new LinearLayoutManager(this));
        mRatingsRecycler.setAdapter(mRatingAdapter);

        mRatingDialog = new RatingDialogFragment();
    }