Android Question Response.GetAsynchronously problem

Sub wc_ResponseSuccess (Response As OkHttpResponse, TaskId As Int)
    ProgressDialogHide
    If Response.ContentType = "text/plain; charset=UTF-8" Then
        Dim Out As OutputStream = File.OpenOutput(File.DirDefaultExternal, "Log.txt", False)
        Log(Response.GetAsynchronously("GetResponse", Out, True, TaskId))
    End If
End Sub

Sub GetResponse(Success As Boolean, TaskId As Int)
    If Success Then
        Dim In As InputStream = File.OpenInput(File.DirDefaultExternal, "Log.txt")
        Dim Reader As TextReader
        Reader.Initialize(In)
        Log(Reader.ReadAll)
        In.Close
    Else
        Log(LastException)
    End If
End Sub