尝试为SearchView制作原始ArrayList的副本时无法复制ArrayList

如何解决尝试为SearchView制作原始ArrayList的副本时无法复制ArrayList

我正在尝试为我的应用程序构建SearchView，并在YouTube上遵循“ CodingInFLow”的教程时，他说要创建将包含所有项目的原始ArrayList的副本。我完全按照教程进行操作，并使用我的应用程序进行了类似的操作。但是，当我编写“ mUploadsSearch = new ArrayList （上传）”时，它不存储任何数据，我的应用程序也不在SearchView上返回任何数据。如果我写“ mUploadsSearch = uploads”，它可以工作并过滤内容，但第一次搜索仅一次。

这是我的ImageAdapter代码：

public class ImageAdapter extends RecyclerView.Adapter<ImageAdapter.ImageViewHolder> implements 
Filterable {
private Context mContext;
private List<Upload> mUploads;
private List<Upload> mUploadsSearch;

private OnItemClickListener mListener;
public ImageAdapter(Context context,List<Upload> uploads) {
    mContext = context;
    mUploads = uploads;
    mUploadsSearch = new ArrayList<Upload>();
    mUploadsSearch.addAll(uploads);
}
@Override
public ImageViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {
    View v = LayoutInflater.from(mContext).inflate(R.layout.image_item,parent,false);
    return new ImageViewHolder(v);
}
@Override
public void onBindViewHolder(ImageViewHolder holder,int position) {
    Upload uploadCurrent = mUploads.get(position);
    holder.textViewName.setText(uploadCurrent.getName());
    Picasso.get()
            .load(uploadCurrent.getImageUrl())
            .placeholder(R.drawable.ic_food)
            .fit()
            .centerCrop()
            .into(holder.imageView);
}
@Override
public int getItemCount() {
    return mUploads.size();
}

@Override
public Filter getFilter() {
    return filter;
}
private Filter filter = new Filter() {
    @Override
    protected FilterResults performFiltering(CharSequence charSequence) {
        List<Upload> filteredList = new ArrayList<>();
        if (charSequence == null || charSequence.length() == 0) {
            filteredList.addAll(mUploadsSearch);
        } else {
            String filterPattern = charSequence.toString().toLowerCase().trim();
            for (Upload item : mUploadsSearch) {
                if (item.getName().toLowerCase().contains(filterPattern)) {
                    filteredList.add(item);
                }
            }
        }

        FilterResults results = new FilterResults();
        results.values = filteredList;
        return results;
    }

    @Override
    protected void publishResults(CharSequence charSequence,FilterResults results) {
        mUploads.clear();
        mUploads.addAll((Collection<? extends Upload>) results.values);
        notifyDataSetChanged();
    }
};

public class ImageViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener
//        View.OnCreateContextMenuListener,MenuItem.OnMenuItemClickListener
{
    public TextView textViewName;
    public ImageView imageView;
    public ImageViewHolder(View itemView) {
        super(itemView);
        textViewName = itemView.findViewById(R.id.text_view_name);
        imageView = itemView.findViewById(R.id.image_view_upload);
        itemView.setOnClickListener(this);
        //itemView.setOnCreateContextMenuListener(this);
    }
    @Override
    public void onClick(View v) {
        if (mListener != null) {
            int position = getAdapterPosition();
            if (position != RecyclerView.NO_POSITION) {
                mListener.onItemClick(position);
            }
        }
    }
}
public interface OnItemClickListener {
    void onItemClick(int position);
    //void onWhatEverClick(int position);
    //void onDeleteClick(int position);
}
public void setOnItemClickListener(OnItemClickListener listener) {
    mListener = listener;
}

}

很抱歉遇到任何错误，对于编程我是完全陌生的，将不胜感激。