一： 在activity里
binding = DataBindingUtil.setContentView(this, R.layout.activity_main) = binding = ActivityMainBinding.inflate(layoutInflater) setContentView(binding.root)
二：在RecyclerView的onCreateViewHolder里，不能使用：
val binding = RecyclerViewItemBinding.inflate(layoutInflater)it didn‘t work
要使用：
val binding = DataBindingUtil.inflate<RecyclerViewItemBinding>( layoutInflater, R.layout.recycler_view_item, parent, false )
原文：https://www.cnblogs.com/--here--gold--you--want/p/14872295.html