android import external classes into eclipse

Question

I've seen many ways to import my own classes to a project, but they all just say "do this, do that" and there's no explanation of how the thing actually works. I'm used to iPhone development and there i just link the classes from an external folder to the project and i can modify them in the IDE or externally - they will still be linked (that is they are not copied to the project during development, they're merely links to actual files). I was wondering if such a thing is possible on eclipse? Ideally when i add another class to the folder, it should also appear in eclipse if possible.

• i link the external class (without making any copies of it)
• i modify the class, it gets modified for all projects using it
• on build, eclipse automatically includes the file as well

Thanks

Answer 1

Android library projects is the answer you're looking for. You'll find a good documentation for it here: Setting up a Library Project

Answer 2

Sounds like you should set up an Android Library Project. Once you've done this, you can add references to the library project to as many applications as you need.