Access static final variables on a class in one app, from another app

While I continue to ponder this for the technical consequences that hitting 'compile' generates, shouldn't I be able to access static final variables on a class in one project/app, from another project/app? The one project is in the build path of the other. It compiles but throws a NoClassDefFound error at runtime.

Both apps are mine, so I have a bit of freedom here, though I don't think sharing the user id and process is involved here. I开发者_开发问答t's important that the class stays within one of the projects. I'm not looking for solutions like Android Library Projects or JAR libraries.

EDIT: After consideration, I'm abandoning this idea since it had a few logic mistakes. What I really want seems to be to let the first app offer some function to the second. I.e. so that the second app can send the first some data, and get a result back. The functionality has little domain related value, rather a technical one, so I'd like the shortest simplest solution.

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Each app instance is sandboxed, so you can't get directly at the memory of another process. Unencumbered data sharing between apps as you suggest would amount to a gaping security hole.

If you need to communicate between apps to share data, look into the ContentProvider

From the docs:

Content providers store and retrieve data and make it accessible to all applications. They're the only way to share data across applications; there's no common storage area that all Android packages can access.

EDIT:

After consideration, I'm abandoning this idea since it had a few logic mistakes. What I really want seems to be to let the first app offer some function to the second. I.e. so that the second app can send the first some data, and get a result back. The functionality has little domain related value, rather a technical one, so I'd like the shortest simplest solution.

There's a solution for that too. Intents