I know of Android Library projects, which allow you to create a shared-source project that can be pulled into Android Applications as needed. However, that requires that sou
Android doesn't provide a special kind of Android-JAR. But what you can do is adding a build.xml to your project and build the JAR with ant.
My build.xml looks like this:
This is my Android lib
Build the JAR by running ant jar in your projects main folder.
ant jar