Блог

Раньше я не использовал привязку данных, и теперь я добавил ее в свой проект, но у меня проблема. Я не могу автоматически привязать свои данные. Во время открытия действия мои данные отображаются в текстовых местах и немедленно исчезают. Итак, я сделал что-то подобное для целей тестирования, когда я нажал на card views in recyclerview , я снова привязываю. На этот раз мои данные были перенесены в соответствующие места. В чем моя проблема? (Прошу прощения за мой плохой английский.)

Код адаптера;

  @NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    LayoutInflater inflater = LayoutInflater.from(parent.getContext());
    FoodListBinding binding = DataBindingUtil.inflate(inflater,R.layout.food_list,parent,false);
    return new ViewHolder(binding);
}

@Override
public void onBindViewHolder(@NonNull final ViewHolder holder, final int position) {
    holder.binding.foodNameTextview.setText(_foodModelArrayList.get(position).getBesin_adi());
    holder.binding.portionTextview.setText(_foodModelArrayList.get(position).getBesin_id());

    holder.foodListCardview.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            holder.binding.foodNameTextview.setText(_foodModelArrayList.get(position).getBesin_adi());
            holder.binding.portionTextview.setText(_foodModelArrayList.get(position).getBesin_id());
        }
    });
}

@Override
public int getItemCount() {
    return _foodModelArrayList.size();
}

public class ViewHolder extends RecyclerView.ViewHolder {

    FoodListBinding binding;
    private LottieAnimationView addFoodAnim;
    private CardView foodListCardview;

    public ViewHolder(@NonNull FoodListBinding binding) {
        super(binding.getRoot());
        this.binding = binding;
    }
}
 

Фрагмент кода;

 @Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    Intent getDateFromActivity = getActivity().getIntent();
    date = getDateFromActivity.getStringExtra("date");
    loadingAnim = view.findViewById(R.id.loadingAnim);

    recyclerView = view.findViewById(R.id.recyclerView);


    enterFoodViewModel.getFood().observe(requireActivity(), new Observer<List<EnterFoodModel>>() {
        @Override
        public void onChanged(List<EnterFoodModel> enterFoodModels) {
            if (enterFoodModels!=null){
                loadingAnim.setVisibility(View.GONE);
            }
            foodList = enterFoodModels;
            recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
            enterFoodRecyclerAdapter = new EnterFoodRecyclerAdapter(getContext(),foodList,date);
            recyclerView.setAdapter(enterFoodRecyclerAdapter);
            enterFoodRecyclerAdapter.notifyDataSetChanged();
        }
    });
}
 

xml-код;

 <?xml version="1.0" encoding="utf-8"?>
<layout>
  <data>
   <variable
     name="foods"
     type="com.example.calorie.models.EnterFoodModel" />
</data>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="4dp">
<androidx.cardview.widget.CardView
    android:id="@ id/foodListCardview"
    android:layout_width="match_parent"
    android:layout_height="80dp"
    android:layout_marginStart="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginBottom="2dp"
    android:clickable="true"
    android:elevation="10dp"
    android:focusable="true"
    android:foreground="?android:attr/selectableItemBackground"
    app:cardCornerRadius="8dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">
<TextView
    android:id="@ id/foodNameTextview"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="16dp"
    android:layout_marginTop="16dp"
    android:gravity="center"
    android:text="@{foods.besin_adi}"
    android:textColor="@android:color/black"
    android:textSize="18sp"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />
<TextView
    android:id="@ id/portionTextview"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="8dp"
    android:gravity="center"
    android:textColor="@color/colorAccent"
    android:text="@{foods.besin_id}"
    android:textSize="15sp"
    app:layout_constraintStart_toStartOf="@ id/foodNameTextview"
    app:layout_constraintTop_toBottomOf="@ id/foodNameTextview" />
<com.airbnb.lottie.LottieAnimationView
    android:id="@ id/addFoodAnim"
    android:layout_width="50dp"
    android:layout_height="50dp"
    android:layout_marginEnd="16dp"
    android:visibility="gone"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:lottie_autoPlay="true"
    app:lottie_loop="true"
    app:lottie_rawRes="@raw/loading" />
  </androidx.constraintlayout.widget.ConstraintLayout>
  </androidx.cardview.widget.CardView>
  </androidx.constraintlayout.widget.ConstraintLayout>
</layout>


Problem images;
When the applications is fragment: https://hizliresim.com/7HA2E8
After clicking on cardviews: https://hizliresim.com/qu8yIO
 

Попробуйте binding.foods = enterFoodsModels подключить свой класс данных к макету XML.

Я обновил свои коды таким образом, и ошибка была исправлена.

 @Override
public void onBindViewHolder(@NonNull final ViewHolder holder, final int position) {
    EnterFoodModel enterFoodModel = _foodModelArrayList.get(position);
    holder.bind(enterFoodModel);
}

public class ViewHolder extends RecyclerView.ViewHolder {
    FoodListBinding binding;
public ViewHolder(FoodListBinding binding) {
    super(binding.getRoot());
    this.binding = binding;
}
public void bind(EnterFoodModel enterFoodModel){
    binding.setFoods(enterFoodModel);
    binding.executePendingBindings();
    }
}