Why convention over configuration design paradigm is not more wide spread on android?

I want to know why android doesn't use extensively design paradigm convention over configuration, because It would do things more standard and easy to use and less boilerplate code to write.

For instance there is not a standard way structure your code, I saw this way on a github http://ift.tt/1387VRH, but google doesn't provide a standard way to do so.

A negative aspect of this situation is when you want to use data biding, you must specify in XML, which model you are referring to because there is not a default package for models.