Android Question jRDC2, Customlistview, MySQL

Sub GetRecord
    Dim req As DBRequestManager = CreateRequest
    Dim cmd As DBCommand = CreateCommand("czytaj2",Null)
    Wait For (req.ExecuteQuery(cmd, 0, Null)) JobDone(j As HttpJob)
    If j.Success Then
    
        req.HandleJobAsync(j, "req")
        Wait For (req) req_Result(res As DBResult)
          
        If res.Rows.Size > 0 Then
      
        Dim row() As Object = res.Rows.Get(a)
                Label1.Text = row(res.Columns.Get("col1"))
            Label2.Text = row(res.Columns.Get("col2"))
        Label3.Text = row(res.Columns.Get("col3"))
        
        Dim ima As B4XBitmap
        ima = BytesToImage(row(res.Columns.Get("image")))
        ImageView1.SetImage(ima)

        Else
        Log("ERROR: " & j.ErrorMessage)
        End If
    End If
    j.Release
End Sub

Public Sub BytesToImage(bytes() As Byte) As B4XBitmap
   Dim In As InputStream
   In.InitializeFromBytesArray(bytes, 0, bytes.Length)
   Dim bmp As Image
   bmp.Initialize2(In)
   Return bmp

End Sub

Sub Button3_Click
    a=a+1
    If a =10 Then a=0
    GetRecord
End Sub