"no main manifest attribute"-- error whiles adding backlessness.jar to Android Studio Project

I am a newbie, I just started the “Getting Started Guide”. I am trying to include the jar file in my Android Project. But it has failed to compile. I checked the MANIFEST.MF file, and there seem to be no Main Class in it. Please how do I go around this?

With the command line you showed in the screenshot, you’re not compiling. The compiler in JDK is called “javac”, instead you’re trying to “run” backendless.jar as an application (which is not, it is a library)