FirebaseMessagingService是否默认在后台运行? [英] Does FirebaseMessagingService run in the background by default?

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:

必须从主线程调用方法execute，当前推断的线程是worker.

Method execute must be called from the main thread, currently inferred thread is worker.

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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