ButtonEvent.kt

class ButtonEvent : CustomEvent(){
  override fun getEventName() {
      return "event_tag" //event tag
  } 
}

LoginEvent.kt

class LoginEvent (private val userId:String) : CustomEvent(){
    override fun getEventName() {
      return "login" // the event tag
  }
   override fun getParameters(): MutableMap<String, Any> {
        return hashMapOf("user_id" to userId) // map of parameters
   }
}

MainActivity.kt

//imports

 
class MainActivity : BaseActivity() {
  
  @Inject
  lateinit var appAnalytics: AppAnalytics

  override fun onCreate(savedInstanceState:Bundle?){
      super.onCreate(savedInstanceState)
      
      myButton.setOnClickListener{
          appAnalytics.log(ButtonClickEvent())
      }
  }
  
  override fun onStart(){
    appAnalytics.log(ViewMainScreenEvent())
  }
  
}

MainPresenter.kt

class MainPresenter @Inject constructor (
  private val appAnalytics: AppAnalytics,
  private val loginUseCase: LoginUseCase
) : BasePresenter(){
  
  
    fun login(){
         loginUseCase.execute({userId->
             appAnalytics.log(LoginEvent(userId)) 
         }, {error->
           //handle error
         })
 }
}

ViewMainScreenEvent.kt

class ViewMainScreenEvent : ContentViewEvent(){
    override fun getName(){
      return "view_main_screen" //the tag of the view event
    }
}