stuff.kt

class AddNoteActivity : BaseActivity<AddNoteViewModel>() {

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_add_note)
    add_note_button.setOnClickListener { viewModel.addNoteClicked(note_text.text.toString()) }

    observeTrigger(viewModel.setResultAndFinishStream, this::setResultAndFinish)
    observeTrigger(viewModel.showAddNoteFailedErrorStream, this::showErrorMessage)
    observe(viewModel.shouldEnableAddNoteButtonStream, add_note_button::setEnabled)
    observe(viewModel.shouldShowLoadingIndicatorStream, swipe_refresh::setRefreshing)
  }
}