You’re quite right, the discontinuous axis feature is not yet implemented in the Android version, though it is present in the iOS version.
We released V1.0 of the product with a minimum core feature set (less than the iOS Standard version) for fairly simple charts with limited customisability, which suffice for a reasonable proportion of our customers, and the Early Bird pricing scheme reflected this. We’re adding features incrementally to bring it up the level of the iOS version (Standard first, then Premium) over a number of fairly frequent (monthly) releases. Version V1.1 is now out, with bar charts, legends, and axis styling. V1.2 will follow in about 2 weeks with Selection, Crosshairs, Grlidlines and stripes.
The prioritisation in our roadmap beyond the forthcoming release is flexible and driven by customer demand. Discontinuous axes are a Premium feature in the iOS product, but up till now we have had no demand for them in the Android version, so they have not been high up the priority list. Now that you have expressed an interest, we’ll move them up in priority, but to be honest I would not expect to see them implemented in either of the next 2 releases. This pushes the likely date to early 2014.
The current API does not expose the methods you would need to override in order to provide this functionality yourself. While in principle it is simple (and a non-breaking change) to make package private methods protected, in practice the amount of work required to ensure that your scenario and - crucially - all others that might make use of these methods would work correctly is pretty much equivalent to providing the discontinuous axis feature.
I’m sorry to have to disappoint you with this, but I would not wish to have you relying on delivery promises we cannot keep.