File Excel From Apache POI Cant Open by Ms Excel (corrupt)

Question

I don\'t know why the file I write using POI cant be opened by Ms Excel 2013, but the file is still readable by POI. (cell value can be changed)

this is the error fr

Answer 1

Solved :

by using real android device instead of bluestack emulator, I dont know why, but it works!!

Thanks everyone :D