RecyclerView仅显示习惯数组中的第一个元素

// 创建RecyclerView实例
RecyclerView recyclerView = findViewById(R.id.recyclerView);

// 设置布局管理器
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);

// 创建Adapter类
public class HabitAdapter extends RecyclerView.Adapter<HabitAdapter.ViewHolder> {
    private List<String> habits;

    public HabitAdapter(List<String> habits) {
        this.habits = habits;
    }

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

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        String habit = habits.get(position);
        holder.habitTextView.setText(habit);
    }

    @Override
    public int getItemCount() {
        return 1; // 只显示一个列表项
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        TextView habitTextView;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            habitTextView = itemView.findViewById(R.id.habitTextView);
        }
    }
}

// 设置Adapter
List<String> habits = new ArrayList<>();
habits.add("习惯1");
habits.add("习惯2");
habits.add("习惯3");

HabitAdapter adapter = new HabitAdapter(habits.subList(0, 1)); // 只显示第一个元素
recyclerView.setAdapter(adapter);