Question

当点击操作栏上的按钮时，我希望某个布局在我的所有recyclerview项目上都可见。

谷歌没有帮助，我也不知道如何解决这个问题。

这方面的一个例子是，当用户想要从收件箱中删除大量SMS消息时，按住该按钮会突然启用Recyclerview中每个项目的复选框。

编辑：

public class ViewCartAdapter extends RecyclerView.Adapter<ViewCartAdapter.DataViewHolder>
{
    private List<ViewCartModel.Product> dataList;
    private Context con;

    public ViewCartAdapter(Context context, List<ViewCartModel.Product> list)
    {
        this.dataList = list;
        con = context;
    }

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

    @Override
    public void onBindViewHolder(final DataViewHolder dataViewHolder, int i)
    {
        dataViewHolder.setClickListener(new DataViewHolder.ClickListener()
        {
            @Override
            public void onClick(View v, int pos, boolean isLongClick)
            {

            }
        });

        ViewCartModel.Product item = dataList.get(i);

        Picasso.with(con).load(item.getThumb().replaceAll(" ", "%20")).into(dataViewHolder.itemImage);
        dataViewHolder.itemName.setText(Html.fromHtml(item.getName().toUpperCase()).toString());
        dataViewHolder.itemPrice.setText(item.getPrice());
        dataViewHolder.categoryID = item.getKey();
    }

    @Override
    public DataViewHolder onCreateViewHolder(ViewGroup viewGroup, int i)
    {
        View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.tile_cart, viewGroup, false);
        DataViewHolder dvh = new DataViewHolder(itemView);

        return dvh;
    }

    public static class DataViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener
    {
        protected ImageView itemImage;
        protected TextView itemName;
        protected TextView itemPrice;
        protected String categoryID;

        private ClickListener clickListener;

        public DataViewHolder(View v)
        {
            super(v);

            itemImage = (ImageView) v.findViewById(R.id.itemImage);
            itemPrice = (TextView) v.findViewById(R.id.itemPrice);
            itemName = (TextView) v.findViewById(R.id.itemName);

            v.setOnClickListener(this);
        }

        public interface ClickListener
        {
            /**
             * Called when the view is clicked.
             *
             * @param v           view that is clicked
             * @param position    of the clicked item
             * @param isLongClick true if long click, false otherwise
             */

            public void onClick(View v, int position, boolean isLongClick);
        }

        public void setClickListener(ClickListener clickListener)
        {
            this.clickListener = clickListener;
        }

        @Override
        public void onClick(View v)
        {
            clickListener.onClick(v, getPosition(), false); // here, get position
        }
    }
}

Answer 1

当绑定到ViewHolder时，你应该保持一个布尔值来告诉我是否显示或隐藏了复选框。然后，当您长按按钮时，切换布尔值，并在适配器上调用“notifyItemRangeChanged”以重新绑定ViewHolder。

单击按钮更改RecyclerView项目

1 个答案: