Android Question File.copy, copy is bigger than original...

[MitchBu]

I want to log PDF files used to print, so I did this after creating 1.pdf :

    If File.Exists(File.DirInternal, "1.pdf") = True Then
        File.Copy(File.DirInternal,"1.pdf",File.DirDefaultExternal,"Print-" & DateTime.Now & ".pdf")
End If

Original (1.pdf) is 21.91 KB
Copy (Print-1560764371069.pdf) is 39.13 KB

Both seem to be valid pdf documents.

Is there any reason to that size difference ?

 

[Erel]

It is a mistake to use File.DirDefaultExternal. See the runtime permissions video tutorial.

What is the output of:

Log(File.Size(File.DirInternal, "1.pdf"))
Log(File.Size(File.DirDefaultExternal,"Print-" & DateTime.Now & ".pdf"))

 

[MitchBu]

OK. Now I have

If File.Exists(File.DirInternal, "1.pdf") = True Then
        Dim f As String = rp.GetSafeDirDefaultExternal("")
        Log("safedir: " & f)
        File.Copy(File.DirInternal,"1.pdf",F,"Printo-" & DateTime.Now & ".pdf")

But yet, the copy remains much bigger than the original.

 

[DonManfred]

But yet, the copy remains much bigger than the original.

Answering erels question is not worth to give one?

 

[MitchBu]

Log(File.Size(File.DirDefaultExternal,"Print-" & DateTime.Now & ".pdf"))

Result - 0

My question was more of curiosity than anything. Like, for instance, the fact that the copy be bigger than the original could be due to the size of clusters, or something.

Meh..

 

[Erel]

File.Copy will not change the file size. It is possible that you are seeing some other effect.
However it is difficult to say more based on the code you posted.

 

[Kiffi]

@MitchBu : Try this, please

Dim SourceFile As String = "1.pdf"
Dim TargetFile As String = "Print-" & DateTime.Now & ".pdf"

If File.Exists(File.DirInternal, SourceFile) = True Then
  File.Copy(File.DirInternal, SourceFile, File.DirDefaultExternal, TargetFile)
  Log("Size of SourceFile: " & File.Size(File.DirInternal, SourceFile))
  Log("Size of TargetFile: " & File.Size(File.DirDefaultExternal, TargetFile))
Else
  Log("SourceFile doesn't exists")
End If

Greetings ... Peter

 

[MarkusR]

i think i have two reason.
the file was not overwritten, delete it first and be sure its gone.
if you look the files at pc, to not trust this virual file system. maybe reboot windows.