Xavier finally commented on the issues page involving this. Apparently
they planned a migration article but didn't get to it by the release.
It has bitten developers in different ways. One thing I had notice
about my build using a library was that with the release prior to 14 I
was getting two R.java files, one for the wrapper and one for the
library. I was concerned about problems that might cause but observed
that both were the same. However in one mention about changes on the
developer section ID collisions were a concern and one reason for the
change.
http://code.google.com/p/android/issues/detail?id=20398
And then there are the different ways that developers use libraries. In
my case I was referencing some other source code but not really using it
as a "library" in the sense of using the jar file. This was one of two
ways that was previously mentioned in articles on using a library. This
allowed for my wrapper to set some variables then that would cause my
"library" to build a specific version for that release. With this
method no jar was created for the library but the code just merged. I
still think this is a reasonable method of development but the "merge"
system no longer works.
With the new method a jar is created. But that means I have to put the
definition file in the library code and change it every time I want a
slightly different version of the library (usually only effecting a
couple of functions). They also said they did the jar thing to speed
up builds though I wouldn't have noticed on my multi-core 64-bit machine
that merged code took any more time.
What I think the team learned from this was you can't make such radical
changes without forewarning developers. Some who needed to issue an
update for their app were burned by this.
- Brian
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