Google has today announced that they have released the first developer preview for their next mobile OS, Android N.
You wouldn’t be mistaken for thinking this is an early release for the preview, Google gave it’s reasoning for that in the following statement, stating that they wanted more time to receive more feedback on the release before they release to the public.
Today we’re happy to announce a Developer Preview of the N release of Android! We’re doing something a little different this year by releasing the preview early… really early. By releasing a “work in progress” build earlier in development, we have more time to incorporate developer feedback. Also, the earlier preview allows us to hand off the final N release to device makers this summer, so they can get their hands on the latest version of Android earlier than ever. We’re looking forward to getting your feedback as you get your apps ready for N.
We don’t yet now much about Android N, not even it’s name, but we expect that we might hear more about it during Google’s I/O conference.Source
Source Android Developers