问题描述
FirebaseMessagingService是否在后台运行，类似于IntentService的运行方式?
Does the FirebaseMessagingService run in the background similar to how an IntentService operates?
我看到FirebaseMessagingService扩展区Service不在后台运行，但是我想确定是否应该异步或同步地在FirebaseMessagingService内部进行任何工作.
I see that FirebaseMessagingService extents Service which does not run in the background, but I'd like to be sure whether or not I should be doing any work inside the FirebaseMessagingService asynchronously or synchronously.
谢谢
推荐答案
FirebaseMessagingService的方法onMessageReceived(RemoteMessage message)被称为在后台"(不在UI/Main线程上).如果尝试在onMessageReceived(RemoteMessage message)内部执行异步工作，则会收到一条错误消息:
FirebaseMessagingService's method onMessageReceived(RemoteMessage message) is called "in the background" (not on the UI/Main thread). If you try do asynchronous work inside onMessageReceived(RemoteMessage message) you will receive an error saying:
因此，在onMessageReceived(RemoteMessage message)中完成的所有工作都应同步完成，因为它在其自己的后台工作线程中.
So all work that is done within onMessageReceived(RemoteMessage message) should be done synchronously because it's in its own background worker thread.
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