Android 2.1 programmatically unmount SDCard

Question

I have an application that writes important data to the SDCard and encrypts it using AES, which later will be used by a desktop application. I have noticed that if I do not unmo

Answer 1

You should unmount what's using the sdcard in the proper order, for example

umount /mnt/sdcard/.android_secure
umount /mnt/sdcard

or, probably synchronizing the buffers with the filesystem would be enough

sync; sync