AOSP系统服务与服务差异 [英] AOSP System Service vs Service Differences

问题描述

我试图更好地理解这些差异，以便评估是否应该实现系统服务或服务.我从文档中发现的差异如下:

I'm trying to get a better understanding of the differences so I can evaluate if I should be implementing a System Service, or a Service. The differences that I have found from the docs are the following:

系统服务

1. 从SystemServer开始
2. 已添加到ServiceManager
3. 认为是强制性的，并在出现故障时软重启设备
4. 更多权限? (不确定服务可以做什么)

服务

1. 是否已初始化并开始使用意图?

两者之间还有其他区别吗?我正在修改AOSP以包括我自己的服务，并且所提供的任何其他信息都将有助于我做出决定.

Is there anything else is different between the two? I'm modifying AOSP to include my own service, and any additional supplied information would be helpful in assisting me make a decision.

推荐答案

1. 所有系统服务都在称为system_server的同一进程中运行.

1. All system services are run in the same process called system_server.

很多事情系统服务可以但是服务不能.系统服务通常具有更高和更指定的分隔符，例如普通的应用程序将没有(例如，更改NFC硬件参数).

There's a lot of things which system service can but service can't. system service usually has a higher and more specified sepolicy which normal apps will not have, for example(change NFC hardware parameters).

因此，如果要添加自己的系统服务，请注意上面的内容，如果代码有死锁，则将影响所有系统服务.并且没有单独的条款，您的服务可能仍然无法访问某些资源.

so if you want add you own system service, notice things above, if you code has a deadlock, you will affect all system services. and without a sepolicy, you service may still unable to access some resources.

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