注意： RecyclerView 中的数据有位置改变（比如删除）时一般不会重新调用 onBindViewHolder() 方法，除非这个元素不可用。 为了实时获取元素的位置，我们通过 ViewHolder.getAdapterPosition() 方法。 @param binding @param

Method to make PATCH request @param url The url on which request is to be made @return The PatchRequestBuilder

setting listener to get callback for load more

subscribing for data

private constructor to prevent instantiation of this class

Simulation of network data

Method to make download request @param url The url on which request is to be made @param dirPath The directory path on which file is to be save