“Android library projects cannot be launched”?

Question

Now I am totally confused by this error message: Android library projects cannot be launched.

I carefully checked the build path and library, every

Answer 1

our project surely is configured as "library" thats why you get the message : "Android library projects cannot be launched."

right-click in your project and select Properties. In the Properties window -> "Android" -> uncheck the option "is Library" and apply -> Click "ok" to close the properties window.