Android Question android.os.NetworkOnMainThreadException

[AHilberink]

Hi,

I use the following code:

Sub SendToPrinter(bestand As String, ip As String) As ResumableSub
    Try
        Dim s As Socket
        s.Initialize("s")
        s.Connect(ip, 9100, 3000)
    
        Wait For s_Connected (Success As Boolean)
        If Success = False Then Return False
        Dim out As OutputStream = s.OutputStream
        Dim In As InputStream = File.OpenInput(File.DirInternal, bestand)
        Dim data() As Byte = Bit.InputStreamToBytes(In)
        In.Close
        Log("Data: "&data.Length)
    
        out.WriteBytes(data, 0, data.Length)
        Log(14)
        out.Flush
        Log(15)

        Sleep(300)
        s.Close
        Log(16)

        Return True
    Catch
        Log(LastException.Message)
        Return False
    End Try
End Sub

I got the exception "android.os.NetworkOnMainThreadException" on "out.WriteBytes(data, 0, data.Length)". Data: 1618751 is filled.

Can someone help?

Kind regards,
André

 

[Erel]

The best solution is to switch to AsyncStreams and avoid making network communication on the main thread. This can lead to your app being frozen.

You can also disable this warning: https://www.b4x.com/android/forum/t...-networkonmainthread-exception.44760/#content