在notifydatasetchanged() 上滑动圆角丢失并变成方形

Question

I'm loading image url using glide and applying rounded corner transformation. It works fine for first setup of recyclerview. Later when i call notifydatasetchanged() after pagination it becomes square. What am I missing?

Glide.with(mContext)
      .load(primary.getpSmallImage())
      .bitmapTransform(new RoundedCornersTransformation(mContext, 8, 0, RoundedCornersTransformation.CornerType.ALL))
      .placeholder(R.drawable.ic_ph_small)
      .into(thumbnailImage);

Answer 1

Use this diskCacheStrategy Saves the media item after all transformations to cache.

  Glide.with(mContext)
  .load(primary.getpSmallImage())
  .diskCacheStrategy(DiskCacheStrategy.RESULT)
  .bitmapTransform(new RoundedCornersTransformation(mContext, 8, 0, 
   RoundedCornersTransformation.CornerType.ALL))
  .placeholder(R.drawable.ic_ph_small)
  .into(thumbnailImage);

Answer 2

If the problem happens after calling notifydatasetchanged() then don't use it. In fact, that method takes a lot of CPU resources and recreate every item in recyclerview even these items have been already added.

When paginating use notifyItemInserted or notifyItemRangeInserted . It'll allow you to avoid your problem.

Answer 3

Don't use notifyDataSetChanged() method for pagination at all. instead use notifyItemInserted() . DiffUtil is a better choice for your apps performance.

If you're loading your image inside onBindViewHolder() method this problem shouldn't happen.

Answer 4

datalist.clear(); //clear old data before adddi
SampleAdapter adapter = (SampleAdapter) recyclerview.getAdapter();
recyclerview.setAdapter(null);
recyclerview.setAdapter(adapter);
datalist.addAll(resource.getData());//add new data
adapter.notifyDataSetChanged();

I also had the same problem and fixed it in this way