https://blog.piasy.com/2016/03/26/Insight-Android-RecyclerView-ItemDecoration/?utm_source=tuicool&utm_medium=referral
同时可以查看
深入理解 RecyclerView 系列之：ItemAnimator https://blog.piasy.com/2016/04/04/Insight-Android-RecyclerView-ItemAnimator/
及作者博客：https://blog.piasy.com/tags/#Java