Android开发Java空指针异常

Question

我在片段内创建了一个带有回收器视图的应用程序，但由于 holder.titleText.setText(itemArrayList.get(position).getText()) 中的以下异常，我的应用程序每次运行时都会崩溃：

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference

这里是 MyAdapter 代码：

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    Context context;
    ArrayList<Item> itemArrayList;

    public MyAdapter(Context context, ArrayList<Item> itemArrayList) {
        this.context = context;
        this.itemArrayList = itemArrayList;
    }


    @NonNull
    @Override
    public MyAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.fragment_item_list, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Item item = itemArrayList.get(position);
        holder.titleText.setText(itemArrayList.get(position).getText());
        holder.titleImage.setImageResource(item.getImage());
    }


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

    public static class ViewHolder extends RecyclerView.ViewHolder{
        ImageView titleImage;
        TextView titleText;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            titleImage = itemView.findViewById(R.id.titleiImage);
            titleText = itemView.findViewById(R.id.titleText);
        }
    }
}

这是我的 ItemFragment 代码：

public class ItemFragment extends Fragment {
    private ArrayList<Item> itemArrayList;
    private int[] imageResourceId;
    private String[] texts;
    private MyAdapter myAdapter;
    private RecyclerView recyclerView;

    public ItemFragment() {
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_item_list, container, false);
        dataInitialize();
        myAdapter = new MyAdapter(getContext(), itemArrayList);
        recyclerView = (RecyclerView) view;
        recyclerView.setAdapter(myAdapter);
        return view;
    }

    private void dataInitialize() {
        itemArrayList = new ArrayList<>();
        imageResourceId = new int[] {
                R.drawable.ic_launcher_background,
                R.drawable.ic_launcher_background,
                R.drawable.ic_launcher_background,
        };

        texts = new String[] {
                getString(R.string.blackpink),
                getString(R.string.redvelvet),
                getString(R.string.itzy),
        };

        for(int i = 0; i < texts.length; i++) {
            Item item = new Item(imageResourceId[i], texts[i]);
            itemArrayList.add(item);
        }
    }
}

我在网上搜索过，但仍然找不到解决方案。我会很感激你的帮助^^