RecyclerView accessibility bug demo project

It is a demo project to demonstrate a bug with integration between RecyclerView and accessibility.

Bug

When RecyclerView prefetches future ViewHolder via GapWorker sometimes it does not invoke bind method. When such ViewHolder is recycled, ViewCompat.setAccessibilityDelegate is invoked passing null as a parameter, leading to losing original accessibility delegate, that was set on ViewHolder view.

It does not happen with a regular (non-prefetch) flow because bind method is always invoked, and the original delegate is stored.

Steps

1. Start the app.
2. Scroll.
3. See a crash at CustomView.setAccessibilityDelegate or Adapter.onBindViewHolder because the view delegate is neither RecyclerView accessibility delegate nor the original custom one. It was lost during prefetch by GapWorker.

License

Copyright 2022 Bumble

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.