不可见的ViewHolder动画在RecyclerView中被延迟

Question

In the ViewHolder of my RecyclerView, I have a method that is called to animate the alpha value of one of its TextViews. The ViewHolders are registered to a global notifier in onBindViewHolder and unregistered in onViewRecycled . When notified, all visible ViewHolders run the animation immediately. Those that are binded to but not currently visible end up delaying the animation until it's visible. My expectation would be that the animation for these ViewHolders would have either already started, or would be skipped entirely.

I've also created a Gist for the class used in the example.

My fix is to only run the animation for ViewHolders that are visible. I'm asking this question mostly for enlightenment and also to make sure I'm not missing something here.

Answer 1

You should use ItemAnimators

https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemAnimator.html

Example code: https://github.com/wasabeef/recyclerview-animators