适配器类错误。创建时不得附加 ViewHolder 视图

Question

我的代码有问题，我在一个 recyclerview 中创建了两个适配器。我把它们都放在一个类中，我需要这个适配器根据某些情况返回一个 Viewholder。

这是我的适配器代码：

public class CurrentUserTaskListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

public List<Task> taskList;

private static final int ITEM_TYPE_PUBLISHED_TASK = 1;

private static final int ITEM_TYPE_ASSIGNED_TASK = 2;

public CurrentUserTaskListAdapter(List<Task> taskList) {

    this.taskList = taskList;

}

public class AssignedTaskViewHolder extends RecyclerView.ViewHolder {

    View mView;

    public TextView tvTagAndDate;

    public TextView tvStatus;

    public AssignedTaskViewHolder(View itemView) {

        super(itemView);

        mView = itemView;

        tvTagAndDate = itemView.findViewById(R.id.tvTagAndDate);

        tvStatus = itemView.findViewById(R.id.tvStatus);

    }

}

public class PublishedTaskViewHolder extends RecyclerView.ViewHolder {

    View mView;

    public TextView tvTagAndDate;

    public TextView tvStatus;

    public PublishedTaskViewHolder(View itemView) {

        super(itemView);

        mView = itemView;

        tvTagAndDate = itemView.findViewById(R.id.tvTagAndDate);

        tvStatus = itemView.findViewById(R.id.tvStatus);

    }

}

    @Override

    public int getItemViewType(int position) {

        if (taskList.get(position).getAssignedTo() == null)

            return ITEM_TYPE_PUBLISHED_TASK;

        else

            return ITEM_TYPE_ASSIGNED_TASK;

    }

@NonNull

@Override

public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {

    LayoutInflater layoutInflater = LayoutInflater.from(viewGroup.getContext());

    if(i == ITEM_TYPE_ASSIGNED_TASK){

        layoutInflater.inflate(R.layout.layout_curent_user_assigned_tasks_item, viewGroup, false);

        return new AssignedTaskViewHolder(viewGroup);

    }

    else if (i == ITEM_TYPE_PUBLISHED_TASK){

        layoutInflater.inflate(R.layout.layout_current_user_pending_tasks, viewGroup, false);

        return new PublishedTaskViewHolder(viewGroup);

    }

    return null;

}

在 getItemViewType 方法中，我验证列表中的对象是哪个类型。

Answer 1

修复这部分，例如：if (i == ITEM_TYPE_ASSIGNED_TASK) {&nbsp; &nbsp; View view = layoutInflater.inflate(R.layout.layout_curent_user_assigned_tasks_item, viewGroup, false);&nbsp; &nbsp; return new AssignedTaskViewHolder(view);} else if (i == ITEM_TYPE_PUBLISHED_TASK) {&nbsp; &nbsp; View view = layoutInflater.inflate(R.layout.layout_current_user_pending_tasks, viewGroup, false);&nbsp; &nbsp; return new PublishedTaskViewHolder(view);}问题是您正在传递 ViewHolder 的项目布局应该位于的父布局。祝你好运！