Hello everyone!
As you might be aware, there has been ongoing work on a Commons application for Android[1]. Hashar was awesome enough to set up automated builds of it on Jenkins - you can download the latest from:
https://integration.mediawiki.org/nightly/mobile/android-commons/
It is currently at a state where you can upload fine (goes to testwiki), but has minor issues on pre-4.0 devices. Expect rapid work on it over the coming weeks!
[1]: https://github.com/wikimedia/android-commons