Comment by yeet
11 years ago
google had a very good reason to move services outside AOSP, to update them without relying on carriers. they could release billing API v3 w/ 90% compatibility in day 1. this is how they could workaround fragmentation. as an android dev, i love being able to read framework source code for better design, performance and less bugs. that is all really matters imho.
for development yes, thats like providing a SDK. I can develop just fine on Windows phones and even iOS :) So basically, its not really all that opensource anymore, that's what most people mean.
it is not the same with providing an SDK. Well, if android was documented better, we would not need source code this much but most of the time, it requires checking the actual implementation to understand the whole picture. Probably it is the difference between being "just fine" to creating great things.