I used to work with Android-x86, and produced my own version of the OS by customizing it. It was somehow difficult to get a working environment to compile, but once it was done, making changes was pretty easy.
How should I start with Android for Orange Pi One Plus if I want to customize the current image?
Well, I downloaded the User Manual And Schematics, the image, Android tools... And didn't find any instruction.
I'm currently downloading the source code.
I now have all the tgz files, still fighting with them to get the whole directory and the files.
I just bought two Zero, because they look better supported by other communities.