I'm attempting to follow the Android ROS tutorial here, but I am using ROS Indigo. My build of any project fails with:

Error:FAILURE: Could not determine which tasks to execute.

• What went wrong: Task 'assemble' not found in root project 'android_apps'.

• Try: Run gradle tasks to get a list of available tasks.

Is there an updated set of instructions? If not, and these instructions work on Indigo, is there some configuration I have missed?