能否从服务检测到后退按钮preSS？

由于头说，真的吗？我做了很多使用Google，但无法找到一个明确的答案。 也没有办法做到这一点？

能否从服务检测到后退按钮preSS？

没有，对不起。如果您在前台的活动，该活动可以检测到返回preSS。如果你没有在前台的活动，返回按钮无关，与你的code。

Can the a backbutton press be detected from a service?

As the header says really? I have done a lot of googling but can't find a definitive answer. Nor a way to do it?

Can the a backbutton press be detected from a service?

No, sorry. If you have an activity in the foreground, the activity can detect a BACK press. If you do not have an activity in the foreground, the BACK button has nothing to do with your code.