Here\'s the use case:
A friend and I are building an Android app and along with it want to integrate a game. The core of the app has been built in Eclipse but we ar
A project written in App Inventor cannot be exported into Eclipse.
The created .apk file is not a binary file. It is a ZIP archive of several files and folders, but none of them is java code.
What can be done to combine an App Inventor app with an app created with Android SDK is to make use of the ActivityStarter component inside App Inventor. Details on that are here: http://appinventor.googlelabs.com/learn/reference/other/activitystarter.html
Finally, keep in mind that App Inventor apps cannot be uploaded directly to the Market. However, some users have created a process that allows to do that, it is called Marketizer.
If you spend some time reading posts from this forum: programming-with-app-inventor (it is a Google Groups forum), you might get even better ideas.