I had set up a new development machine and had installed all of my usual development tools, including Visual Studio and Eclipse. To make sure the setup was complete and successful I created and ran the usual "Hello World" in both of the environments. I kept getting an error from Eclipse when running the Android Hello World project that made no sense to me.
"The project cannot be built until the build path errors are resolved."
I found the resolution for this at Scott D. Strader's blog. To summarize the solution I only needed to add a library to my project and then remove it to force Eclipse to perform the necessary actions to resolve the problem. I would post the detailed steps here but I don't want to steal his content. But if you cam across this page because you encountered this same error click on the link above to be taken to the detailed resolution steps.