BaseBinding

BaseViewBindingActivity:

abstract class BaseBindingActivity<VB : ViewBinding> : AppCompatActivity() {

    protected lateinit var binding: VB

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(withGenericBindingClass<VB>(this) { clazz ->
            clazz.getMethod("inflate", LayoutInflater::class.java).invoke(null, layoutInflater) as VB
        }.also { binding = it }.root)
    }

    private fun <VB : ViewBinding> withGenericBindingClass(any: Any, block: (Class<VB>) -> VB): VB {
        var genericSuperclass = any.javaClass.genericSuperclass
        var superclass = any.javaClass.superclass
        while (superclass != null) {
            if (genericSuperclass is ParameterizedType) {
                genericSuperclass.actualTypeArguments.forEach {
                    try {
                        return block.invoke(it as Class<VB>)
                    } catch (e: NoSuchMethodException) {
                    } catch (e: ClassCastException) {
                    } catch (e: InvocationTargetException) {
                        throw e.targetException
                    }
                }
            }
            genericSuperclass = superclass.genericSuperclass
            superclass = superclass.superclass
        }
        throw IllegalArgumentException("There is no generic of ViewBinding.")
    }

}

BaseDataBindingFragment:

open class BaseDataBindingFragment<DB : ViewDataBinding> : Fragment() {

    var binding: DB? = null

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        return withGenericBindingClass(this) {
            it.getMethod("inflate", LayoutInflater::class.java, ViewGroup::class.java, Boolean::class.java)
                .invoke(null, layoutInflater, container, false) as? DB
        }.also { binding = it }?.root
    }

    private fun <DB> withGenericBindingClass(any: Any, block: (Class<DB>) -> DB): DB {
        var genericSuperclass = any.javaClass.genericSuperclass
        var superclass = any.javaClass.superclass
        while (superclass != null) {
            genericSuperclass.let { it as? ParameterizedType }?.actualTypeArguments?.forEach {
                return block.invoke(it as Class<DB>)
            }
            genericSuperclass = superclass.genericSuperclass
            superclass = superclass.superclass
        }
        throw IllegalArgumentException("There is no generic of DataBinding.")
    }

    override fun onDestroyView() {
        binding?.unbind()
        binding = null
        super.onDestroyView()
    }

}