android - 在使用 Retrofit 和 Room 时，我是否需要提及协程调度程序？

Question

最近我看到了这个 - Most data sources already provide main-safe APIs like the suspend method calls provided by Room or Retrofit. Your repository can take advantage of these APIs when they are available.这是什么意思？调度员是否在幕后 Dispatcher.IO改造和房间？还是我需要在提出请求时明确提及？谢谢你。

withContext(Dispatchers.IO) {
    // Some retrofit call or room query
}

Answer 1

不，您无需提及 Retrofit 和 Room 的调度员。对于 Room，当您将 dao 函数标记为挂起乐趣时，可以保证它不会阻塞主线程。
你可以阅读这篇文章https://medium.com/androiddevelopers/room-coroutines-422b786dc4c5
从文章

Room calls the CoroutinesRoom.execute suspend function, which switches to a background dispatcher, depending on whether the database is opened and we are in a transaction or not.