Unresolved reference async in Kotlin

Question

I am trying to perform network operation async in Kotlin. I read it you can do async using async function. I am getting below error, can anyone gue

Answer 1

Different Kotlin libraries can have different implementations of async that do different things.

If you wanted the general async-await function from the core library, make sure you have a dependency to kotlinx.coroutines

Answer 2

async is available inside kotlinx.couroutines

Make sure that you added the dependency in your gradle file:

implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.1.1'

Also make sure that the async is called on a coroutine scrope such as GlobalScope.

 val deferredResult = GlobalScope.async {

            }

Answer 3

I see async function is available in anko library not Kotlin library itself. https://github.com/Kotlin/anko

I resolved by adding this dependency in build.gradle compile "org.jetbrains.anko:anko-commons:0.10.1" as this is not available in Kotlin itself.

I see that async is deprecated now, library suggests to use doAsync instead.

doAsync {
    val forecastWeather = ForecastRequest("302015").execute()
    uiThread {
        Log.d("Test", forecastWeather.toString())
    }
}