Official Android Raspberry Pi support appears to be in the works1
A Google employee created the Raspberry Pi 3 repository at the AOSP a few weeks back, but so far we've yet to see any code published to it. There have already been a few efforts to get various Android builds running on Raspberry Pi devices, but a formal Google-sanctioned release could go a very long way towards encouraging experimentation with the platform on the hardware.
That's an interesting development not just for those of us curious to see the potential of this combo as a learning tool really take off, but also Android fans interested in DIY projects. Bringing Android to a Raspberry Pi opens up the door for connecting powerful software with a polished UI - perfect for attaching to some low-cost custom hardware. How long until we see users brew up an Android Pi media server, smart-home hub, or other connected appliance?
Raspberry Pi 3 motherboards can be bought for around $40, and while users will want to add extras like power, storage, and probably some sort of input and output, that still represents a very low cost of entry for anyone interested in playing around with electrical engineering -and now (or soon)- Android development.
source: AOSP via Android Police