Android Question Calculate CRC on uploading file

[imgsimonebiliato]

Hello,
I created an application 1 year ago, that use the SMB library to upload some images from the android device to a server (maybe there is something better nowadays?).
On the other case, sometimes these images aren't uploaded completely, despite the library says "Upload success", so I need to implement a system to verificate the upload process.

I thought to calculate the crc of the file, but I don't know how to do that. Someone, please, can help me? Also if there are any other secure mechanisms to upload files.

 

[DonManfred]

Have you tried this
https://www.b4x.com/android/forum/threads/string-crc32.50661/#post-316844

 

[imgsimonebiliato]

Have you tried this
https://www.b4x.com/android/forum/threads/string-crc32.50661/#post-316844

This is the first time I see it. But, in my case, what do I have to check (i mean I calculate the crc of the file from what)?

 

[DonManfred]

i guess from it´s byte-array

 

[imgsimonebiliato]

i guess from it´s byte-array

What do you mean? The class that you linked, is refered to a crc calculated from string