如何做一个服务，它的活动沟​​通？如何服务调用方法的活动，它启动的服务？ [英] How does a Service communicate with its Activity? How can a Service call a method in the Activity, which started that Service?

问题描述

假设我有一个活动，这是一个列表。它调用一个服务时，该活动开始。该服务会做背景的东西 - 下载，分析，并填写列表

Suppose I have an Activity that's a list. It calls a Service when this Activity starts. The Service will do background stuff--download, parse, and fill the list.

我的问题是：如何能与活动在服务通信？ 我怎样才能在活动调用一个方法，从服务？ （我是新来的OOP）

My question is this: How can the Service communicate with the Activity? How can I call a method in the Activity, from the Service? (I'm new to OOP)

该服务已启动这样的：

hello_service = new Intent(this, HelloService.class);
startService(hello_service);

我的一个服务做的一件事情就是下载和解析XML。在此之后，它需要填充列表！所以，我想通过解析的东西，回到活动，并在活动调用一个方法来填补这个列表中。

One of the things my service does is download and parse an XML. After that, it needs to fill a list! So, I want to pass the parsed stuff back to the Activity, and call a method in the Activity to fill that list.

推荐答案

最近，我问了一个非常类似的问题，<一个href="http://stackoverflow.com/questions/2274641/best-way-for-service-that-starts-activity-to-communicate-with-it/">best方式为服务启动活动与它沟通，这有一个非常有用的答案。

I recently asked a very similar question, best way for service that starts activity to communicate with it, that got a very helpful answer.

此外，考虑使用的AsyncTask ，而不是一个服务，如果该服务不需要活着活动时关闭。然后，你不必费心与服务器/活动的通信。

Also, consider using AsyncTask instead of a service if the service doesn't need to be alive when the activity is closed. Then you don't need to bother with the server/activity-communication.

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