android - Android development specifics

Question

I am looking into mobile app development, and I had some questions about the android platform.

1. Does the android platform use a central settings and preferences page (much like the gears icon on an iOS device)?

2. I've been reading about services. Are these what I would use if I wanted to develop an application that doesn't have a UI (think something like the drop box client)?

3. In my reading about services I read that the android OS will kill your service when it thinks that it needs to reclaim resources. Is there a way to ensure a service wouldn't be killed?

4. How much control would I as a developer have over the physical hardware? Say if I wanted to make an app to block distractions, and to do this I would need to control the networking interfaces beyond purposely misconfiguring these interfaces to block their connection? Can I programmatically turn off these interfaces?

Answer 1

1. 每个单独的应用程序都有自己的设置页面，但这通常是使用内置的 Android 设置类创建的（您可以只是子类PreferenceActivity）

2. 每个应用程序都必须有一个活动（带有 UI 的屏幕），但是可以，您可以在服务中完成大部分工作，这类似于台式计算机上的后台进程

3. 没有办法确保Android不会在没有root手机的情况下终止您的服务。然而，

“如果服务绑定到具有用户焦点的活动，那么它就不太可能被杀死，如果服务被声明在前台运行（稍后讨论），那么它几乎永远不会被杀死”^链接

1. 是的，您可以通过Android API访问任何硬件（GPS、WiFi、蓝牙、3G 无线电、相机等）。但是，您必须向用户请求安装时许可才能处理它们。此外，其他程序可以重新打开它们。