BroadcastReceiver的或Messenger通过处理程序 [英] BroadcastReceiver or Messenger via Handler

问题描述

我有一个 IntentService 这需要传递一个消息给活动。 我知道这样做的两种方式。

I have an IntentService which need to pass a message to an Activity. I know two ways of doing so.

1. 使用 sendBroadcast（）在服务一边登记 broadcastReciever 在活动侧，将接收的消息。

1. use sendBroadcast() at the Service side while registering a broadcastReciever at the Activity side which will receiver the message.

传递使者到服务侧，它会指向一个处理程序在活动端，这将是准备接收消息的服务。

passing a Messenger to the Service side, which will point to a Handler at the Activity side, which will be ready to receive that message from the service.

哪一个是它的目的是好的？或者两者做？

Which one is good for which purpose? Or both of them do the same?

推荐答案

如果你的 IntentService 不知道活动是否会存在（例如，可能已被破坏），或者是否有可能是在前台，并会想知道发生了什么事情，我会使用多种活动 sendOrderedBroadcast（）。你可以安排到那么也有一个逆止器的BroadcastReceiver ，可以提出一个通知，如果需要的话，我勾勒出的这个博客帖子和演示的此示例项目。

If your IntentService does not know whether the activity will exist (e.g., might have been destroyed), or if there are multiple activities that might be in the foreground and would want to know about what's going on, I'd use sendOrderedBroadcast(). You can arrange to then also have a "backstop" BroadcastReceiver that could raise a Notification, if desired, as I outline in this blog post and demonstrate in this sample project.

无论你的技术可以工作，虽然。

Either of your techniques can work, though.

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