glide使用，item不可见时（滑过了或页面切换了）。停止加载

glide和RecyclerView版本：

implementation 'com.github.bumptech.glide:glide:3.8.0'
    implementation 'androidx.recyclerview:recyclerview:1.1.0'

列表适配器代码

//未封装adapter
public class GridAdapterNoPack extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    private LayoutInflater mLayoutInflater;
    List<SearchResultItem> list;

    public GridAdapterNoPack(Context context, List<SearchResultItem> list) {
        mLayoutInflater = LayoutInflater.from(context);
        this.list = list;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = mLayoutInflater.inflate(R.layout.grid_item, parent, false);
        ItemViewHolder viewHolder = new ItemViewHolder(view);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
        if (position < list.size()) {
            ImageView iv = ((ItemViewHolder) holder).mContentTv;
            Glide.with(iv.getContext())
                    .load(list.get(position).getPgrpLogo())
                    .placeholder(R.mipmap.epg_bg)
                    .listener(new RequestListener<String, GlideDrawable>() {
                        @Override
                        public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {
                            return false;
                        }

                        @Override
                        public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) {
                            Log.e("Glide", " position:" + position + " onResourceReady");
                            return false;
                        }
                    })
                    .into(iv);
            holder.itemView.setTag(position);
        }
    }

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

    class ItemViewHolder extends RecyclerView.ViewHolder {
        private ImageView mContentTv;

        ItemViewHolder(View itemView) {
            super(itemView);
            mContentTv = itemView.findViewById(R.id.video_image);
        }
    }

    void add(List<SearchResultItem> list, boolean b) {
        this.list.addAll(list);
        notifyDataSetChanged();
    }
}

滑动列表 观察图片加载情况，onResourceReady打印了表示该位置图片加载完成。可得出结论：item不可见时线程及时回收了。
因为我在项目中使用了BaseQuickAdapter类，观察发现快速滑动，之前的item还是会加载。
为了解决这个问题，只得手动停止加载，代码如下：

@Override
    public void onViewDetachedFromWindow(@NonNull RecyclerView.ViewHolder holder) {
        super.onViewDetachedFromWindow(holder);
        if(holder.getAdapterPosition()!=-1){
            Glide.clear(holder.itemView.findViewById(R.id.video_image));
        }
    }

值得注意的是，我本来使用glide4.9.0时，无论有没有使用baseQuickAdapter都没办法暂停线程。所以回退到了3.8.0
新版本真的要慎重检验再使用。