Convert PDF Documents to Excel Documents

val cPDFConvert = CPDFConverterExcel(context, uri, "")
val params = CPDFConvertExcelOptions()
val result: ConvertError = cPDFConvert.convert(outputDir, outputfilename, params, pageArrays,
onHandle = onHandleCal,
onProgress = onProgressCal,
onPost = onPostCal)