CatsAdapter.java

public static class CatsViewHolder extends RecyclerView.ViewHolder {

        protected ImageView image;
        private final ProgressBar progress;
        private final MyProgressTarget<GlideDrawable> target;

        public CatsViewHolder(View v) {
            super(v);
            image = (ImageView) v.findViewById(R.id.image);
            progress = (ProgressBar) v.findViewById(R.id.progress);
            target = new MyProgressTarget<>(new GlideDrawableImageViewTarget(image), progress, image);
        }

        void bind(String url, DrawableRequestBuilder<String> thumbnailRequest) {
            target.setModel(url); // update target's cache
            Glide.with(image.getContext())
                    .load(url)
                    // .asBitmap()
                    .diskCacheStrategy(DiskCacheStrategy.SOURCE)

                    .listener(new RequestListener<String, GlideDrawable>() {
                        @Override
                        public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {
                            if (BuildConfig.DEBUG)
                                Log.e("IMAGE_EXCEPTION", "Exception " + e.toString());
                            return false;
                        }

                        @Override
                        public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) {
                            return false;
                        }
                    })
                    // .placeholder(R.drawable.github_232_progress)

                      .thumbnail(thumbnailRequest)
                    .centerCrop() // needs explicit transformation, because we're using a custom target
                    .into(target)
            ;