Problem Recovering Data from Firebase and Moving to Object

Question

I’m trying to make an inventory app in order to study. Where items can be added, saved to firebase and then displayed in a Recyclerview

Items are being saved normally in firebase:

But in time to retrieve them with:

 valueEventListenerItems = itemsReference.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

            itemsList.clear();

            for (DataSnapshot dados: dataSnapshot.getChildren() ){                    

                Items items = dados.getValue(Items.class);
                items.setItemId(dados.getKey());
                itemsList.add(items);


            }

            adapterItems.notifyDataSetChanged();

        }

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError) {

        }
    });

}

It doesn’t work, the data goes blank. I tried to run the following logs:

Follows the code of the classes

Items

public class Items {

private String name, description, itemId;
private int amount;

public Items() {
}


public void saveItem(){
    FirebaseAuth auth = FirebaseConfig.getFirebaseAuth();
    DatabaseReference ref = FirebaseConfig.getFirebaseRef();

    String userId = Base64Custom.codify64Base(auth.getCurrentUser().getEmail());

    ref.child("inventory")
            .child(userId)
            .push()
            .setValue(this);

}


public String getItemId() {
    return itemId;
}

public void setItemId(String itemId) {
    this.itemId = itemId;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getDescription() {
    return description;
}

public void setDescription(String description) {
    this.description = description;
}

public int getAmount() {
    return amount;
}

public void setAmount(int amount) {
    this.amount = amount;
}

}

Activity

public class ItemsActivity extends AppCompatActivity {

private RecyclerView recyclerItems;
private AdapterItems adapterItems;
private List<Items> itemsList = new ArrayList<>();

private FirebaseAuth authentication = FirebaseConfig.getFirebaseAuth();

private DatabaseReference itemsReference = FirebaseConfig.getFirebaseRef();

private ValueEventListener valueEventListenerItems;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_items);

    recyclerItems = findViewById(R.id.recyclerItems);

    //configurar adapter recebe dados e formata o layout
    adapterItems = new AdapterItems(itemsList,this);



    //configurar recycler
    RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
    recyclerItems.setLayoutManager(layoutManager);
    recyclerItems.setHasFixedSize(true);
    recyclerItems.setAdapter(adapterItems);


    FloatingActionButton fabAddItem = findViewById(R.id.fabAddItem);
    fabAddItem.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            startActivity(new Intent(ItemsActivity.this, AddItemActivity.class));
        }
    });


}

public void showItems(){
    String email = authentication.getCurrentUser().getEmail();
    String id = Base64Custom.codify64Base(email);

    itemsReference.child("inventory")
            .child(id);



    valueEventListenerItems = itemsReference.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

            itemsList.clear();

            for (DataSnapshot dados: dataSnapshot.getChildren() ){

                String name = dados.child("name").getValue(String.class);
                Log.i("name", " name "+name);


                Items items = dados.getValue(Items.class);
                items.setItemId(dados.getKey());
                itemsList.add(items);


            }

            adapterItems.notifyDataSetChanged();

        }

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError) {

        }
    });

}

@Override
protected void onStart() {
    super.onStart();
    showItems();

}

@Override
protected void onStop() {
    super.onStop();
    //remover listener
    itemsReference.removeEventListener(valueEventListenerItems);

}

}

Firebaseconfig

public class FirebaseConfig {

private static FirebaseAuth auth;
private static DatabaseReference ref;

public static DatabaseReference getFirebaseRef(){
    if(ref == null){
        ref = FirebaseDatabase.getInstance().getReference();
    }
    return ref;
}

public static FirebaseAuth getFirebaseAuth(){
    if (auth == null){
        auth = FirebaseAuth.getInstance();
    }
    return auth;
}

}

Could someone help me? I’m trying all day and I can’t fix it. Thank you in advance!