Music/beatmaking app for Android?

Give G-Stomper a try. It's an Electribe like 11-Track Drum Machine (for Android) with a powerful effect chain (3 processors, 17 effect types). Live Pattern Arranger, Song Mode, Motion Sequencing, Audio import/export, SoundCloud integration, and much more. Available at google market (free demo and full (paid) version).

http://www.planet-h.com/gstomper