kotlinx.coroutines not found-CodePudding

I'm writing React Native and implemented a custom UI component for Android. One of the props I send to the component is a large array of objects. The deserialization in Android (Kotlin) tooks some time (>200ms) and I'm trying to use async to prevent blocking the UI.

@ReactProp(name = "items")
fun setItems(view: CustomListView, items: ReadableArray) {
    async {
        val itemsList = deserializItems(items)
        view.setItems(itemsList)
    }
}

but Android Studio says: Unresolved reference: async

I added these to my app build.gradle:

implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.4"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.4"

and tried to import manually kotlinx.coroutines but Android Studio doesn't find it as well.

How can I get async functionality in Android?

CodePudding user response：

You need a coroutine scope to be able to call async.

I am not familiar with react development, but how i would use it something like this from inside a viewModel.

val asyncFunction = viewModelScope.async {
        //do your background work here
    }

and then you need to await() it later.

    viewModelScope.launch {
        asyncFunction.await()
    }

For import i have this in the gradle files

implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.4'
implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.4'

and these are the imports

import kotlinx.coroutines.*

Also, it might sound silly, but make sure to sync gradle after adding the dependencies.

Or by using the "Sync Now" button displayed on the screen when editing the gradle file.