ViewBinding sample

HomeFragment.kt

class HomeFragment: Fragment(R.layout.fragment_home) {
  private val binding by viewBinding { FragmentHomeBinding.bind(it) }
  
  // do not implement onCreateView!
  
  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    binding.mainText.text = "Hello World!"
  }
}

ViewBindingExtensions.kt

fun <VB : ViewBinding> Fragment.viewBinding(viewBindingFactory: (view: View) -> VB): ReadOnlyProperty<Fragment, VB> {
    return object : ReadOnlyProperty<Fragment, VB> {
        override fun getValue(thisRef: Fragment, property: KProperty<*>): VB {
            val view = thisRef.view!!
            @Suppress("UNCHECKED_CAST") var binding = view.getTag(R.id.viewbinding_tag) as? VB

            if (binding == null) {
                binding = viewBindingFactory(view)
                view.setTag(R.id.viewbinding_tag, binding)
            }

            return binding
        }
    }
}