How to migrate Kotlin from 1.2 to Kotlin 1.3.0 then using async, UI, and bg in a presenter function

Question

I am using MVP pattern on a Kotlin Project. I have a Presenter class:

import com.google.gson.Gson
import kotlinx.coroutines.experimental.android.UI
import kotlinx.coroutines.experimental.async
import org.jetbrains.anko.coroutines.experimental.bg

class TeamsPresenter(private val view: TeamsView,
                     private val apiRepository: ApiRepository,
                     private val gson: Gson
) {
    fun getTeamList(league: String?) {
        view.showLoading()

        async(UI){
            val data = bg {
                gson.fromJson(apiRepository
                    .doRequest(TheSportDBApi.getTeams(league)),
                    TeamResponse::class.java
                )
            }
            view.showTeamList(data.await().teams)
            view.hideLoading()
        }
    }   
}

this presenter class working fine on Kotlin 1.2.71, but I can't get it working on Kotlin 1.3.0.

I updated Kotlin version in project's build.gradle, removed "experimental coroutines" and added kotlin coroutine core dependency:

implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.0.0'

and this is my current code:

import com.google.gson.Gson

class TeamsPresenter(private val view: TeamsView,
                     private val apiRepository: ApiRepository,
                     private val gson: Gson
) {
    fun getTeamList(league: String?) {
        view.showLoading()

        async(UI){
            val data = bg {
                gson.fromJson(apiRepository
                    .doRequest(TheSportDBApi.getTeams(league)),
                    TeamResponse::class.java
                )
            }
            view.showTeamList(data.await().teams)
            view.hideLoading()
        }
    }
}

Error mainly on async, UI, and bg function:

unresolved reference: async
unresolved reference: UI
unresolved reference: bg

How can I get this to work on Kotlin 1.3.0? for any help, thanks in advance.

Answer 1

you must use GlobalScope.launch instead of launch ,GlobalScope.async instead of async Dispatcher.main instead of UI

coroutineBasics