Android HTML to docx Docx4j issues

I am trying to convert html string to docx using the below code as per github code recommended on previous stackoverflow questions.

I added the following libraries other than the ones used for Android docx to HTML by docx4j: 1. docx4j-importXHTML-3.2.2.jar 2. itext-2.1.7.jar 3. xml-renderer-3.0.0.jar 4. xalan-2.7.0.jar

The following is the android version of code in XhtmlToDocxAndBack.java :

       try {
                String html = "<html><head><title>Import me</title></head><body><p>Hello World!</p></body></html>";

                WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.createPackage();

                XHTMLImporterImpl XHTMLImporter = new XHTMLImporterImpl(wordMLPackage);
                XHTMLImporter.setDivHandler(new DivToSdt());

                wordMLPackage.getMainDocumentPart().getContent().addAll(XHTMLImporter.convert(html, null));

                System.out.println(XmlUtils.marshaltoString(wordMLPackage
                        .getMainDocumentPart().getJaxbElement(), true, true));

                wordMLPackage.save(new File("/sdcard/OUT_from_XHTML.docx"));


            } catch (Docx4JException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

Error I receive:

Error:(166, 34) error: cannot access XHTMLImporter
class file for org.docx4j.convert.in.xhtml.XHTMLImporter not found

Error I receive if I comment out XHTMLImporter.setDivHandler(new DivToSdt()):

Error:(168, 34) error: cannot access XHTMLImporter
class file for org.docx4j.convert.in.xhtml.XHTMLImporter not found

Error I receive if I comment out wordMLPackage.getMainDocumentPart().getContent().addAll(XHTMLImporter.convert(html, null)); as well:

Error:Execution failed for task ':app:packageAllDebugClassesForMultiDex'.
> java.util.zip.ZipException: duplicate entry: org/docx4j/convert/in/xhtml/ListHelper.class

I should mention docx to html is working fine in Android studio but the above error is buggy. Please tell me how to fix it. Thanks in advance.