Android Question xlsx to csv converter

[Beja]

Hi all,
looking for a file converter that doesn't rely on web services.. all converters I found so far are online.
Any idea or hint appreciated.

 

[Erel]

jExcel library can read old xls files and it is then simple to save them as CSV.
It doesn't support xlsx files.

B4J jPOI library does support xlsx files.