Another one of the great things about Android (if you're a geek or a tinkerer) is that you have lower-level access to the system itself.
关于Android的另一个利好的事情之一是你有低级别的权限访问系统本身。
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This allows developers to design modular application architectures on top of a lower-level modularity system such as OSGi.
这使得开发者可以在低层次的模块化系统(如osgi)之上设计模块化应用架构。
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There are also new classes allowing access to lower-level information about the file system, and even to supply providers (called FileSystem and FileStore) to access any type of file system you wish.