LoginArch2WaysBindingActivity.kt

var binding: ActivityLoginArch2WaysBindingBinding? = null
var viewModel: LoginArch2WaysBindingViewModel? = null
var presenter: LoginArch2WaysBindingInf.PresenterInf? = null

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    initView()
    initViewModel()
    initPresenter()
}

private fun initView() {
    binding = DataBindingUtil.setContentView(this, R.layout.activity_login_arch_2_ways_binding)
}

private fun initViewModel() {
    viewModel = LoginArch2WaysBindingViewModel()
    binding!!.viewModel = viewModel
}

private fun initPresenter() {
    presenter = LoginArch2WaysBindingPresenter(viewModel, this)
    presenter!!.onInit()
}

override fun performLogin(stringToShow: String) {
    Toast.makeText(this, stringToShow, Toast.LENGTH_LONG).show()
}