How to create a shared library to be used with <uses-library> element

Is there any example of creating shared library referenced here

However, some packages reside in their own libraries. If your application uses code from any of these packag开发者_运维知识库es, it must explicitly asked to be linked against them. The manifest must contain a separate element to name each of the libraries. (The library name can be found in the documentation for the package.)

And here

Specifies a shared library that the application must be linked against. This element tells the system to include the library's code in the class loader for the package.

here is an example http://developer.android.com/resources/tutorials/views/hello-mapview.html this is the only thing I know of that uses it.