How to pack the C code with NDK and run it on Android phone?

My team and I are working on a project by coding in C. We finished coding part, and then we need to bring the project into Android phone.

I installed Android SDK, NDK, eclipse. I try to run our C project in eclipse and it works.

So for the next step, what should we do? How to pack the code by using NDK and test it??

Thank you so much