Android Question FTP and Adroid 8 or 9

[AlpVir]

The following code works perfectly with Android 5 but not with Android 8 or 9

File.WriteString(File.DirRootExternal,"msg2.txt","test")
ftp.Initialize("FTP", Host, 21, Username,Password)
ftp.UploadFile(File.DirRootexternal,"msg2.txt", True,  IndirizzoFTP & "/msg2.txt")

I tried using FileProvider, without success

Dim FileName As String
FileName="msg2.txt"
ftp.Initialize("FTP", Host, 21, Username,Password)
File.Copy(File.DirRootExternal, FileName, Starter.Provider.SharedFolder, FileName)
ftp.UploadFile(File.DirRootexternal,Starter.Provider.GetFileUri(FileName), True, IndirizzoFTP & "/msg2.txt")

I add that FileProvider also uses it in another part of the app and works perfectly.

 ' WhatsApp
        Dim FileName As String = NomeImmagine
        File.Copy(File.DirRootExternal, FileName, Starter.Provider.SharedFolder, FileName) 
        '----
        i.Initialize(i.ACTION_SEND, "")
        i.PutExtra("android.intent.extra.TEXT", "Orario " & Titolo)
        i.SetType("text/plain")
        i.PutExtra("android.intent.extra.STREAM", Starter.Provider.GetFileUri(FileName))
        i.SetType("image/*")
        Dim jo As JavaObject = i
        jo.RunMethod("setPackage", Array("com.whatsapp"))
   
            StartActivity(i)

How to solve?
Thanks in advance

 

[JohnC]

What I would do first is use a file explorer app and make sure that the msg2.txt file actually exists in the expected directory.

That would at least help narrow down the problem.

 

[LucaMs]

What I would do first is use a file explorer app and make sure that the msg2.txt file actually exists in the expected directory.

That would at least help narrow down the problem.

a simple "Log(File.Exists...) should be useful and enough

before the uploading

 

[JohnC]

Also, do you have access to the log file on the FTP server you are trying to upload to? Maybe it can give a clue of whats going wrong.

 

[LucaMs]

Also, do you have access to the log file on the FTP server you are trying to upload to? Maybe it can give a clue of whats going wrong.

 

[JohnC]

a simple "Log(File.Exists...) should be useful and enough

before the uploading

When I'm troubleshooting a problem, I prefer to use an alternative method to verify something important, instead of trusting the same app (that is also giving me the error) if something is correct or not

 

[LucaMs]

When I'm troubleshooting a problem, I prefer to use an alternative method to verify something important, instead of trusting the same app (that is also giving me the error) if something is correct or not

But in this case you could explore wrong directories (or different from those used by the app), while executing the log (file.exists...) when it is useful, you will be sure of what is going to happen.

 

[JohnC]

But in this case you could explore wrong directories (or different from those used by the app), while executing the log (file.exists...) when it is useful, you will be sure of what is going to happen.

It's just the way I troubleshoot - everybody has their own methods.

 

[JohnC]

Just for kicks and giggles....when you are getting this issue on an Android 8 device, are you running in debug mode?

If so, try ALL my suggestions while in release mode and see if it works.

It shouldn't make a difference, but from time to time I do find that debug mode has a few quirks.

 

[AlpVir]

As suggested by JohnC (whom I thank!) for some strange reason compiling in release mode the code now works; before I always worked in debug mode.
Thanks again !

Dim Shd As String
Shd=GetSharedDirectory
File.WriteString(Shd,"msg2.txt",S)
ftp.Initialize("FTP", Host, 21, Username,Password)
ftp.PassiveMode=True
ftp.UseSSL=False
ftp.UploadFile(Shd,"msg2.txt", True, IndirizzoFTP & "/" & "msg2.txt")
ftp.Close