Android Question webviewExtra download file sdk 30

[kkkpe]

With android 11 and sdk 30 the download of the file does not work ..
this is my code:

Sub GetDownloadLink(link As String)
    
    Log("link:")
    Log(link)
    If link <> "" And link.StartsWith("http") Then
        Dim j As HttpJob
        j.Initialize("",Me)
        j.Download(link)
        ProgressDialogShow2("Downloading...",False)
        Wait For (j) JobDone(j As HttpJob)
        ProgressDialogHide
        If j.Success Then
            Dim filename As String = j.Response.GetHeaders.Get("content-disposition")
            Log(filename)
        
            If filename.IndexOf("filename=") <> -1 Then
            filename = filename.SubString2(filename.IndexOf("filename=")+9,filename.Length-1)
            Starter.nomefile = filename
            Dim os As OutputStream
            os = File.OpenOutput(File.DirRootExternal & "/Download",filename,False)
            File.Copy2(j.GetInputStream,os)
            os.Close
            Dim ext As String
            ext = filename.SubString2(filename.LastIndexof("."), filename.Length)
            Log("Estensione file:")
            Log(ext)
            If(ext = ".pdf") Then
                    Dim i As Intent               
                    File.Copy(File.DirRootExternal & "/Download/", filename, Starter.Provider.SharedFolder, filename)               
                    i.Initialize(i.ACTION_VIEW, "")
                    Starter.Provider.SetFileUriAsIntentData(i,filename)
                    'Type must be set after calling SetFileUriAsIntentData
                    i.SetType("application/pdf")
                    StartActivity(i)
            Else If(ext = ".pst") Then
                StartActivity(act_stampapos)
                
            End If

        End If
    End If
    End If
End Sub

The error is in the permissions to access the download folder .. How can I solve?
thank you.

 

[agraham]

You cannot directly access Download in Android 11. You will need to restructure your app to use permitted means of file access.

If you do not need to put your app in the the Play Store you can use this to access Download

Manage External Storage - access internal external storage >= SDK 30

Google seems intent on dumbing down Android to the point of uselessnes to me. I think of my devices as little computers and I want a proper file system on them, not the limited tortuous things that Google offers and that I don't understand, ContentChooser, FileProvider, ... o_O I'm getting old...

www.b4x.com

Alternatively you can use one of these methods. ExternalStorage wpould let the user create/choose a sub-folder in Download but not access Download itself.

SaveAs - Let the user select a target folder + list of other related methods

B4A + B4i example: https://www.b4x.com/android/forum/threads/b4x-texteditor-save-and-load-external-files.132731/#post-838166 List of classes or libraries that can be used to access secondary storages: ContentChooser (Phone libray) - allows the user to select a resource or file using external...

www.b4x.com

 

[Ivica Golubovic]

If you want to open the file after downloading, then you have to place the file in the shared folder using the file preovider class. If you just want to download the file without having to open it through your application, then you can download the file to the Download folder via the download manager for SDK30 (not older versions).

 

[kkkpe]

ok... Can you explain to me how the shared folder works? I read a little bit on the forum but it's a little confused..

 

[Ivica Golubovic]

ok... Can you explain to me how the shared folder works? I read a little bit on the forum but it's a little confused..

Follow the instructions and see examples from this link:

[class] FileProvider - share files

Edit: FileProvider is included as an internal library now. After investigating several issues with the current FileProvider code that you can find in the forum, I decided to make some improvements and implement it in a class. Starting from Android 7 (API 24) you cannot directly share file uris...

www.b4x.com

 

[Ivica Golubovic]

ok... Can you explain to me how the shared folder works? I read a little bit on the forum but it's a little confused..

Sub GetDownloadLink(link As String)
  
    Log("link:")
    Log(link)
    If link <> "" And link.StartsWith("http") Then
        Dim j As HttpJob
        j.Initialize("",Me)
        j.Download(link)
        ProgressDialogShow2("Downloading...",False)
        Wait For (j) JobDone(j As HttpJob)
        ProgressDialogHide
        If j.Success Then
            Dim filename As String = j.Response.GetHeaders.Get("content-disposition")
            Log(filename)
      
            If filename.IndexOf("filename=") <> -1 Then
            filename = filename.SubString2(filename.IndexOf("filename=")+9,filename.Length-1)
            Starter.nomefile = filename
            Dim os As OutputStream
            'os = File.OpenOutput(File.DirRootExternal & "/Download",filename,False)   Not allowed in SDK29 and SDK30
            os = File.OpenOutput(Starter.Provider.SharedFolder,filename,False)  'Alowed'
            File.Copy2(j.GetInputStream,os)
            os.Close
            Dim ext As String
            ext = filename.SubString2(filename.LastIndexof("."), filename.Length)
            Log("Estensione file:")
            Log(ext)
            If(ext = ".pdf") Then
                    Dim i As Intent             
                    'File.Copy(File.DirRootExternal & "/Download/", filename, Starter.Provider.SharedFolder, filename)             
                    i.Initialize(i.ACTION_VIEW, "")
                    Starter.Provider.SetFileUriAsIntentData(i,Starter.Provider.SharedFolder & "/" & filename) 'Or maybe Starter.Provider.SetFileUriAsIntentData(i, filename)
                    'Type must be set after calling SetFileUriAsIntentData
                    i.SetType("application/pdf")
                    StartActivity(i)
            Else If(ext = ".pst") Then
                StartActivity(act_stampapos)
              
            End If

        End If
    End If
    End If
End Sub

Try with this code...