UltraLiquors

public class UltraLiquors extends AppCompatActivity {

    private FirebaseFirestore ultra_liquor_db = FirebaseFirestore.getInstance();
    private CollectionReference promo_oneRef = ultra_liquor_db.collection("ultra_liquors");
    private static final int ACTIVITY_NUM = 2;

    private UltraLiquorsRecyclerAdapter ultra_liquors_adapter;

    private static final String TAG = "Ultra Liquors";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ultra_liquors);
        setUpPromoOneRecyclerView();
        //setupBottomNavigationView();
        setTitle("Ultra Liquors");
        Context context;
    }

    private void setUpPromoOneRecyclerView() {
        Query query = promo_oneRef.whereEqualTo("promo_number", "1").orderBy("department");

        FirestoreRecyclerOptions<Ultra_liquors> options = new FirestoreRecyclerOptions.Builder<Ultra_liquors>()
                .setQuery(query, Ultra_liquors.class)
                .build();

        ultra_liquors_adapter = new UltraLiquorsRecyclerAdapter(options);

        RecyclerView promo_one_recyclerView = findViewById(R.id.recycler_view_ultra_liquors);
        //recyclerView.setHasFixedSize(true);
        promo_one_recyclerView.setLayoutManager(new LinearLayoutManager(this));
        promo_one_recyclerView.setAdapter(ultra_liquors_adapter);


        ultra_liquors_adapter.setOnItemClickListener(new UltraLiquorsRecyclerAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(DocumentSnapshot documentSnapshot, int position) {
                Ultra_liquors note = documentSnapshot.toObject(Ultra_liquors.class);
                String id = documentSnapshot.getId();
                String product = (String) documentSnapshot.get("product");
                String price = (String) documentSnapshot.get("price");
                String path = documentSnapshot.getReference().getPath();
                Toast.makeText(UltraLiquors.this,
                       "Position: " + position + " ID: " + product + price, Toast.LENGTH_SHORT).show();
                Intent intent = new Intent(UltraLiquors.this, ViewProduct.class);
                intent.putExtra("Product", product);
                intent.putExtra("Price", price);
                startActivity(intent);
            }
        });

    }

    @Override
    protected void onStart() {
        super.onStart();
        ultra_liquors_adapter.startListening();
    }

    @Override
    protected void onStop() {
        super.onStop();
        ultra_liquors_adapter.stopListening();
    }
}