MainPresenter.kt

val exceptionHandler: CoroutineContext = CoroutineExceptionHandler { _, throwable -> throwable.printStackTrace() }
 
private fun loadData() = launch(uiContext + exceptionHandler) {
    view.showLoading() // ui thread
 
    val task = async(bgContext) { dataProvider.loadData("Task") }
    val result = task.await() // non ui thread, suspend until the task is finished
 
    view.showData(result) // ui thread
}