Convert PDF Documents to CSV Documents
val cPDFConvert = CPDFConverterCsv(context, uri, "")
val params = CPDFConvertCsvOptions().apply {
isMergeCsv = true
}
val result: ConvertError = cPDFConvert.convert(outputDir, outputFilenameNoSuffix, params, pageArrays,
onHandle = onHandleCal,
onProgress = onProgressCal,
onPost = onPostCal)