BaseFragment2.kt

abstract class BaseFragment<B : ViewDataBinding, VM : BaseViewModel>(@LayoutRes private val layoutResourceId: Int) : Fragment() {

    protected var binding by AutoClearedValue<B>()
    protected abstract val viewModel: VM

    final override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? =
        DataBindingUtil.inflate<B>(inflater, layoutResourceId, container, false).also {
            binding = it
        }.root

    @CallSuper
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        binding.lifecycleOwner = viewLifecycleOwner
        binding.setVariable(BR.viewModel, viewModel)
    }
}