Android Question How to alter last modified date of an external file

[Yaron_hadas]

Hi

How to copy file without changing last modified date?

• so there is no way to alter last modified date of an external file?? or at least copy a file to the external card with all its original attributes?????? How come?
• I'll appreciate a solution to this relatively simple challenge

 

[Erel]

File.Copy without changing the time ?

File explorer copies files without changing their "last modified" property, File.Copy does change it. Is there a way to copy a file without modifying its "last modified" property ? I've found this link showing how you can set this property in java...

www.b4x.com

Note that the file system doesn't always support it.

 

[Yaron_hadas]

Thank you, it worked.
The dealing with the external sd card is cumbersome though and its pity there is no full "easy to use" class (or library) for it

 

[Erel]

You should use ExternalStorage class: ExternalStorage - Access SD cards and USB sticks

Accessing the sd card is more difficult by Google design.

 

[Yaron_hadas]

The external storage class forces the user to pick a file through files interface. One can not just pick it by its path .
There is no routine which converts in a straightforward manner a regular file to an "external file"
There is no direct way to copy a "regular file" from the device (un protected) internal memory to the sdcard with all its original attributes ... and more

 

[Erel]

The external storage class forces the user to pick a file through files interface. One can not just pick it by its path .
There is no routine which converts in a straightforward manner a regular file to an "external file"
There is no direct way to copy a "regular file" from the device (un protected) internal memory to the sdcard with all its original attributes ... and more

B4X libraries never make things more complicated than they need to be.
It is the OS that requires these steps when working with external storages: https://developer.android.com/reference/androidx/documentfile/provider/DocumentFile

 

[Yaron_hadas]