Android support

[Junzz0]

Sorry, because I clicked the wrong order and it closed #292 .

When I manually add the following dependencies,

implementation("xerces:xercesImpl:2.12.2")
implementation("com.fasterxml.woodstox:woodstox-core:6.6.2")

java.lang.NoClassDefFoundError: Failed resolution of: Lorg/apache/xerces/dom/DocumentImpl;error will not be reported.

I call

val odt = OdfTextDocument.newTextDocument()

odt.addText("TEST")

application.contentResolver
.openFileDescriptor(path.toUri(), "w")
.use { pfd -> odt.save(ParcelFileDescriptor.AutoCloseOutputStream(pfd)) }

,The following error will be reported:
java.lang.NoSuchMethodError: No static method newFactory()Ljavax/xml/stream/XMLOutputFactory; in class Ljavax/xml/stream/XMLOutputFactory; or its super classes (declaration of 'javax.xml.stream.XMLOutputFactory' appears in dex)
at org.odftoolkit.odfdom.pkg.rdfa.DOMRDFaParser.(DOMRDFaParser.java:34)
at org.odftoolkit.odfdom.pkg.rdfa.DOMRDFaParser.createInstance(DOMRDFaParser.java:38)
at org.odftoolkit.odfdom.pkg.OdfFileDom.updateInContentMetadataCache(OdfFileDom.java:699)
at org.odftoolkit.odfdom.dom.element.text.TextPElement.onInsertNode(TextPElement.java:114)
at org.odftoolkit.odfdom.pkg.OdfElement.onInsertNode(OdfElement.java:783)
at org.odftoolkit.odfdom.pkg.OdfElement.insertBefore(OdfElement.java:794)
at org.apache.xerces.dom.NodeImpl.appendChild(Unknown Source:1)
at org.odftoolkit.odfdom.pkg.OdfElement.appendChild(OdfElement.java:589)
at org.odftoolkit.odfdom.pkg.OdfFileSaxHandler.startElement(OdfFileSaxHandler.java:137)
at org.odftoolkit.odfdom.pkg.rdfa.MultiContentHandler.startElement(MultiContentHandler.java:76)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source:146)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source:0)
at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source:427)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source:514)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source:15)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source:79)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source:11)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source:5)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source:35)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source:41)
at org.odftoolkit.odfdom.pkg.OdfFileDom.initialize(OdfFileDom.java:236)
at org.odftoolkit.odfdom.dom.OdfContentDom.initialize(OdfContentDom.java:74)
at org.odftoolkit.odfdom.pkg.OdfFileDom.(OdfFileDom.java:102)
at org.odftoolkit.odfdom.dom.OdfContentOrStylesDomBase.(OdfContentOrStylesDomBase.java:45)
at org.odftoolkit.odfdom.dom.OdfContentDom.(OdfContentDom.java:59)
at org.odftoolkit.odfdom.dom.OdfSchemaDocument.getContentDom(OdfSchemaDocument.java:418)
at org.odftoolkit.odfdom.doc.OdfDocument.getContentRoot(OdfDocument.java:737)
at org.odftoolkit.odfdom.doc.OdfTextDocument.getContentRoot(OdfTextDocument.java:321)
at org.odftoolkit.odfdom.doc.OdfTextDocument.addText(OdfTextDocument.java:357)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:104)
at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:111)
at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:99)
at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:584)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:811)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:715)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:702)
Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [StandaloneCoroutine{Cancelling}@e56a0d2, Dispatchers.IO]

[Junzz0]

Check that xml-apis has been imported, but the https://developer.android.com/reference/packages Android documentation does not have the javax.xml.stream package, so I'm not sure if it's because xml-apis doesn't support Android.

[Junzz0]

If the official is willing to be compatible with Android, I still hope to get help.

[svanteschubert]

If you look into the error stack above, you see that the following call does not exist in your Android:
XMLOutputFactory.newFactory()
being called from
https://github.com/tdf/odftoolkit/blob/master/odfdom/src/main/java/org/odftoolkit/odfdom/pkg/rdfa/DOMRDFaParser.java#L34
the method is available in JDK 11:
https://docs.oracle.com/en/java/javase/11/docs/api/java.xml/javax/xml/stream/XMLOutputFactory.html#newFactory()

But it seems Android does not support the full JDK functionality:
https://stackoverflow.com/questions/5176028/how-writing-xml-file-usning-xmlstreamwriter-in-android

To me, it is fine to support Android and would review any pull requested that you might provide, but I am too occupied to pursue this task myself. But perhaps others might be interested as well.

Godspeed!
Svante

PS: For next time, I accidentally closed issues as well, but you may reopen them in the future - but no problem we can continue here... :-)