RecyclerView+glide的优化

优化在了哪里？

只有在Reyclerview停止滑动的时候 再加载图片以此来减少内存和网络的开销

image.png

 recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(@androidx.annotation.NonNull RecyclerView recyclerView, int newState) {
                switch (newState){
                    case RecyclerView.SCROLL_STATE_IDLE:
                        //滑动停止时
                        try {
                            if(getContext()!=null){
                                Glide.with(getContext()).resumeRequests();
                            }
                        }catch (Exception e){

                        }
                        break;
                    case RecyclerView.SCROLL_STATE_DRAGGING:
                    case RecyclerView.SCROLL_STATE_SETTLING:
                         //滑动时
                        try {
                            if(getContext()!=null){
                                Glide.with(getContext()).pauseRequests();
                            }
                        }catch (Exception e){

                        }
                        break;
                }
            }

            @Override
            public void onScrolled(@androidx.annotation.NonNull RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
            }
        });