Question

RecyclerView显示一些正确项目之后的第一个项目。而且不正确的项目之一可能会多次更改自己的数据...这确实很奇怪，我不知道为什么，在另一个应用程序中，我编写了相同的代码，并且一切正常。我试图找到解决方法，但没有发现任何帮助。您可以观看视频以了解发生了什么。 video

@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable 
ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_car_list, container, false);
mRecyclerView = view.findViewById(R.id.car_recycler_view);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
updateUI();
return view;
}

private class CarHolder extends RecyclerView.ViewHolder implements 
View.OnClickListener {

private Car mCar;

public CarHolder(@NonNull final View itemView) {
    super(itemView);
    itemView.setOnClickListener(this);
    mProducerTextView = itemView.findViewById(R.id.producerCardTextView);
    mModelTextView = itemView.findViewById(R.id.modelCardTextView);
    mPriceTextView = itemView.findViewById(R.id.priceCardTextView);
}

public void bind(Car car) {
    mCar = car;
    mProducerTextView.setText(getString(R.string.producer_params, 
mCar.getProducer()));
    mModelTextView.setText(getString(R.string.model_params, 
mCar.getModel()));
    mPriceTextView.setText(getString(R.string.price_params, 
mCar.getPrice()));
}

@Override
public void onClick(View v) {
    mListCallBack.onCarSelected(mCar);
}
}

private class CarAdapter extends RecyclerView.Adapter<CarHolder> {

private List<Car> mCars;

public CarAdapter(List<Car> cars) {
    mCars = cars;
}

@NonNull
@Override
public CarHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    LayoutInflater inflater = LayoutInflater.from(getActivity());
    View view = inflater.inflate(R.layout.list_item_car, viewGroup, false);
    return new CarHolder(view);
}

@Override
public void onBindViewHolder(@NonNull CarHolder carHolder, int i) {
    Car car = mCars.get(i);
    carHolder.bind(car);
}

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

public void setCars(List<Car> cars) {
    this.mCars = cars;
}
}

public void updateUI(){
List<Car> cars = CarLab.getCarLab(getActivity()).getCars();
if (mAdapter == null) {
    mAdapter = new CarAdapter(cars);
    mRecyclerView.setAdapter(mAdapter);
} else {
    mAdapter.setCars(cars);
    mAdapter.notifyDataSetChanged();
}
}

Answer 1

也许您可以尝试使用以下方法来使RecyclerView不回收项目

：

mRecyclerView.getRecycledViewPool().setMaxRecycledViews(0,0);

在onCreate()下面的mRecyclerView.setLayoutManager(...)方法中；

Answer 2

当您使用字段变量mCar（受所有绑定事件操纵）更新您的viewHoleder时，仅使用传递给{{ 1}}来更新视图。

您的代码的另一个问题在car内部，同样，您不应该使用字段变量bind，而是像这样获取所需的项目：

onClick

RecyclerView显示错误的视图

2 个答案: