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]

Try adding this to the manifest - the problem could be that 8 & 9 don't allow non-SSL connections by default:

CreateResourceFromFile(Macro, Core.NetworkClearText)

This line allows non-SSL connections.

 

[AlpVir]

Thanks.
The suggested line is already in the manifest file !

 

[AlpVir]

The error message is

android.system.ErrnoException: open failed: ENOENT (No such file or directory)

 

[DonManfred]

are you using runtimepermission and request permission for this path?

 

[JohnC]

The problem with the FTP method is with this line:

ftp.UploadFile(File.DirRootexternal,Starter.Provider.GetFileUri(FileName), True, IndirizzoFTP & "/msg2.txt")

You need to specify the SharedDirectory instead of "File.DirRootExternal", and (correction to my previous post) do NOT use URI for the filename, just use the filename (just make sure the file you want to upload is in the SharedDirectory).

This is code I use to get the SharedDirectory:

Sub GetSharedDirectory () As String
    Dim SharedFolder As String
    Dim RP As RuntimePermissions
    Dim p As Phone

    If p.SdkVersion >= 24 Or File.ExternalWritable = False Then
        SharedFolder = File.Combine(File.DirInternal, "shared")
        File.MakeDir("", SharedFolder)
    Else
        SharedFolder = RP.GetSafeDirDefaultExternal("shared")
    End If

    Return SharedFolder
End Sub

 

[AlpVir]

Same problem
Shd is /data/user/0/alpvir.orario/files/shared
The error is the same java.lang.RuntimeException: Error uploading file.
The code is this

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

Works with Android 5 but not with Android 8 !!!

 

[LucaMs]

I prefer to use always File.DirInternal!

 

[JohnC]

I just finished a project that did a lot of FTP and I know for a fact that it works fine on Android 9.

Try one or both of these things (these are the only difference I can tell between your project and mine):

Add this line to the Manifest:

AddPermission("android.permission.READ_EXTERNAL_STORAGE")

And in your FTP upload line, change the "True" to False:

ftp.UploadFile(Shd,"msg2.txt", False, IndirizzoFTP & "/msg2.txt"

The "False" forces Binary mode, and you can send text files in binary mode no problem.

 

[AlpVir]

The READ_EXTERNAL_STORAGE line is already in my Manifest.
Even though it was a TXT file I had also done the test of writing "False" in the writing mode.
Without success !!!

 

[JohnC]

I did find two other things my app is doing that maybe your app isn't:

Try adding these two lines after you initialize the FTP:

FTP.PassiveMode = True
FTP.UseSSL = False

 

[AlpVir]

Nothing !!!
I specify that ftp I declared it in Process_Globals

Sub Process_Globals
Dim ftp As FTP
End Sub

Dim Shd As String
Shd=GetSharedDirectory
File.WriteString(Shd,"msg2.txt","test")
Sleep(2000)
ftp.Initialize("FTP", Host, 21, Username,Password)
ftp.PassiveMode=True
ftp.UseSSL=False
ftp.UploadFile(Shd,"msg2.txt", False,  IndirizzoFTP & "/msg2.txt")

 

[AlpVir]

With Android 5 is OK

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

 

[JohnC]

The only thing I can think of is that there is some setting or something on that Android 8 device that is preventing this from working.

Are you using the emulator?

Do you have access to a different 8 or 9 device to test it on?

 

[AlpVir]

Thanks. At the moment I only have one smartphone with Android 5 and one with Android 8. I'll try with an emulator soon.
The latter does not even have an antivirus that could block traffic.
@LucaMs : anche usando DirInternal non funziona

 

[LucaMs]

I prefer to use always File.DirInternal!

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

 

[AlpVir]

That's right. Does not transfer the file

File.WriteString(File.DirInternal,"msg2.txt","test")
Sleep(2000)
ftp.Initialize("FTP", Host, 21, Username,Password)
ftp.PassiveMode=True
ftp.UseSSL=False
ftp.UploadFile(File.DirInternal,"msg2.txt", False,  IndirizzoFTP & "/msg2.txt")

 

[LucaMs]

That's right. Does not transfer the file

File.WriteString(File.DirInternal,"msg2.txt","test")
Sleep(2000)
ftp.Initialize("FTP", Host, 21, Username,Password)
ftp.PassiveMode=True
ftp.UseSSL=False
ftp.UploadFile(File.DirInternal,"msg2.txt", False,  IndirizzoFTP & "/msg2.txt")

But I'm almost sure that "now" it does not transfer the file even from your device with Android 5, right?

 

[AlpVir]

With Android 5 and the code that provides for DirInternal the file is transferred.
With Android 8 no.

 

[LucaMs]

With Android 5 and the code that provides for DirInternal the file is transferred.
With Android 8 no.

Are you sure about this?