Folks,

Didn't get any replies on developer mailing list, so I thought I'll try it
here in case someone has any ideas to share.

I have just started to work on an idea where I'd want to inject some
additional cross cutting concerns -- mainly security with some logging --
to an existing APK files. The closest thing I have encountered online is
this SO thread:
http://stackoverflow.com/questions/5829424/injecting-code-into-apk

Here is my current chain of thought on how to achieve this:

   1. Get the classes.dex file out of the APK
   2. Find if it uses any File or Network IO and change the calls to some
   subclass of the classes it has uses. (If they aren't final)
   3. Inject the DEX code for the subclasses into the original DEX file
   4. Update the header, recalculate hash and resign the updated APK


Before I start implementing the subset of DEX specification, I was
wondering if there were any existing tools/libraries that I can take a look
at for a start.

Thanks,

ATTA

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