Android Question Flash single pulse

Sub Camera1_Ready (Success As Boolean)
    If Success Then
        camEx.SetJpegQuality(90)
        Log(camEx.GetSupportedFlashModes) 'here check first which modes are supported
        camEx.SetFlashMode("torch") 'will turn it on into torch mode
        camEx.CommitParameters
        camEx.StartPreview
       
       
       
        Log(camEx.GetPreviewSize)
    Else
        ToastMessageShow("Cannot open camera.", True)
    End If
End Sub