Reading XLSX on android 4 (Post 1)

!!!UPDATE:
All this hacking is getting redundant with Android Build Tools 21+ and Android 5, please see this post for details: http://blog.kondratev.pro/2015/08/reading-xlsx-on-android-4-and-hopefully.html
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Yesterday I committed XSSF Android usage demo to github:
https://github.com/andruhon/AndroidReadXLSX
The idea is in cleaning jars poi-ooxml and poi-ooxml-schemas from everything which is not necessary to read XLSX format. (just use ZIP archiver to manipulate classes inside, it works well)
This demo already contains reduced poi-ooxml-3.10-reduced.jar and poi-ooxml-schemas-3.10-reduced-more.jar and short building instructions.
Yep, you should use --core-library option to build this project. poi-ooxml depends on xmlbeans and both of them depends on some javax classes which are not available in android. So I have to use StAX library.
UPD: no need in --core-library option any more!

Other posts on reading XLSX on Android:
http://blog.kondratev.pro/2014/09/further-to-my-post-from-yesterday-on.html
http://blog.kondratev.pro/2014/09/reading-xlsx-on-android-3.html

Donate / help
I don't ask for a donation, but you can join me on the LinkedIN and endorse my Java and Android skills if you find this hack useful:
https://nz.linkedin.com/pub/andrei-kondratev/51/445/635