Question

我使用回收站视图来添加和删除带有edittext的块，但是当我删除一个块，然后添加一个新块时，被删除的块中的信息将返回到一个新块，但是我需要添加一个干净的块

 delete.setOnClickListener(v -> {
            int position = getAdapterPosition();
            try {
                connector.remove(position);
                notifyItemRemoved(position);
                notifyItemRangeChanged(position, connector.size());
                notifyDataSetChanged();
            } catch (ArrayIndexOutOfBoundsException e) {
                e.printStackTrace();
            }
        });

 add.setOnClickListener(v -> {
            int position = getAdapterPosition();
            try {
                connector.add(position + 1, "");
                notifyItemInserted(position + 1);
            } catch (ArrayIndexOutOfBoundsException e) {
                e.printStackTrace();
            }
        });

ViewHolder已满：

public class ViewHolder extends RecyclerView.ViewHolder {
    ImageView delete;
    TextInputEditText typeOfConnector;

    @SuppressLint("CutPasteId")
    public ViewHolder(View itemView) {
        super(itemView);
        delete = itemView.findViewById(R.id.iv_garbage);
        typeOfConnector = itemView.findViewById(R.id.type_of_connector_et);

        delete.setOnClickListener(v -> {
            int position = getAdapterPosition();
            try {
                connector.remove(position);
                notifyItemRemoved(position);
                notifyItemRangeChanged(position, connector.size());
                notifyDataSetChanged();
            } catch (ArrayIndexOutOfBoundsException e) {
                e.printStackTrace();
            }
        });

        add.setOnClickListener(v -> {
            int position = getAdapterPosition();
            try {
                connector.add(position + 1, "");
                notifyItemInserted(position + 1);
            } catch (ArrayIndexOutOfBoundsException e) {
                e.printStackTrace();
            }
        });
    }
}

Answer 1

首先，您不需要全部三个命令：

notifyItemRemoved(position);
notifyItemRangeChanged(position, connector.size());
notifyDataSetChanged();

对于您的用例：只需notifyItemRemoved(position);即可

现在，在bindViewHolder方法中，您需要将Edittext设置为连接器中相应的字符串。

当我删除一个项目，然后添加一个新的项目时，删除的项目的信息仍然保留

1 个答案: