See README in https://github.com/lingxuxiong/JetpackGo2/tree/viewbinding

View Binding

What's View Binding

View binding is a feature that allows you to more easily write code
that interacts with views. Once view binding is enabled in a module,
it generates a binding class for each XML layout file present in that
module. An instance of a binding class contains direct references to
all views that have an ID in the corresponding layout.
https://developer.android.com/topic/libraries/view-binding#setup

How to enable View Binding

// Android Studio 4.0
android {
    buildFeatures {
        viewBinding = true
    }
}

Use binding view as view contents

ViewBinding will automatically generate a binding file that corresponds
to the layout source file. Assume activity_main.xml was created with a name
TextView whose id is greeting, the code snippet to inflate and use
the binding view is as follows

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val binding = ActivityMainBinding.inflate(layoutInflater)
        binding.greeting.text = "Hello View Binding"

        setContentView(binding.root)
    }

How to disable View Binding on a layout

<LinearLayout>
        ...
        tools:viewBindingIgnore="true" >
        ...
</LinearLayout>

How to release binding view

In cases like fragments, as the host outlives the views, so references to
the views should be dereferenced appropriately.

private var _binding: ResultProfileBinding? = null
// This property is only valid between onCreateView and
// onDestroyView.
private val binding get() = _binding!!

override fun onCreateView(
    inflater: LayoutInflater,
    container: ViewGroup?,
    savedInstanceState: Bundle?
): View? {
    _binding = ResultProfileBinding.inflate(inflater, container, false)
    val view = binding.root
    return view
}

override fun onDestroyView() {
    super.onDestroyView()
    _binding = null
}

View Binding is encouraged to be used as a replacement of findViewById,
in most cases, with Type-safe and Null-safe capability.

References

1. Sean McQuillan. Use view binding to replace findViewById.02/14/2020, 12/07/2020
2. Google Guide. View Binding. 12/07/2020