This is a simple, but useful offline player with Last.fm scrobbling and extended meta info about your media. Latest APK (link also in QR): https://drive.google.com/open?id=1DPGQKc6rDFXRZBqKUdrspeTpZ4YZeUyu
Go to settings and login into your Last.fm account. Enable the scrobbling toggle, the settings should look like this.
And that's it! Your local songs are now scrobbled on Last.fm!