Kotlin Coroutines the right way in Android

Question

I\'m trying to update a list inside the adapter using async, I can see there is too much boilerplate.

Is it the right way to use Kotlin Coroutines?

can this

Answer 1

Like sdeff said, if you use the UI context, the code inside that coroutine will run on UI thread by default. And, if you need to run an instruction on another thread you can use run(CommonPool) {}

Furthermore, if you don't need to return nothing from the method, you can use the function launch(UI) instead of async(UI) (the former will return a Job and the latter a Deferred).

An example could be:

fun loadListOfMediaInAsync() = launch(UI) {
    try {
        withContext(CommonPool) { //The coroutine is suspended until run() ends
            adapter.listOfMediaItems.addAll(resources.getAllTracks()) 
        }
        adapter.notifyDataSetChanged()
    } catch(e: Exception) {
        e.printStackTrace()
    } catch(o: OutOfMemoryError) {
        o.printStackTrace()
    } finally {
        progress.dismiss()
    }
}

If you need more help I recommend you to read the main guide of kotlinx.coroutines and, in addition, the guide of coroutines + UI