Alpha builds have ceased to refresh. Designers, and a at least one user, use these builds to check the state of master.
https://android-builds.wmflabs.org/ has:
Last successful build
13/09/2016, 19:21:46
A Jenkins job is triggered after a patch is merged: https://integration.wikimedia.org/ci/job/apps-android-wikipedia-publish/ and seems to properly generate a couple apk:
- app-alpha-release-unaligned.apk
- app-alpha-release.apk