MainPresenter.kt

private fun loadData() = launch(uiContext) {
    view.showLoading() // ui thread
 
    try {
        val task = async(bgContext) { dataProvider.loadData("Task") }
        val result = task.await() // non ui thread, suspend until task is finished
 
        view.showData(result) // ui thread
    } catch (e: RuntimeException) {
        e.printStackTrace()
    }
}