Quote:
Originally Posted by stinglikeabee
I'm not sure what version of Android you're using, but I can hot swap flash and SD storage on my phone (HTC One, Android 4.3) with an OTG cable using the ES File Explorer. |
I'm running a CyanogenMod 10.1 nightly build on a Motorola Xoom. Some file explorers may be able to support that; that's not really of any concern to me as I need to do all writing to the drive programmatically from my app. The problem was that the contents of the files I was writing to were not successfully being written out to the external storage if I didn't first unmount the drive from Settings->Storage->Unmount USB storage. It appears that the Android system buffers some external storage file operations, and those buffers aren't synced to the physical device until it is properly unmounted; at least, that's the only explanation I can think of for the behavior I was seeing. This problem was called by executing the shell command "sync; sync" immediately after writing my data to the flash drive. Thank God for SuperSU!
So much for waiting to write up a full explanation
