Android Question webviewExtra download file sdk 30

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