What libraries are there that can be included in a commercial Android client application for simple viewing (editing not required) of doc, docx, xls, xlsx, ppt, pptx, odt, pdf, rtf?
Preferably free or inexpensive. Must be well maintained and without critical bugs.
I've researched quite a few libs (docx4j, aspose.com), and solutions such as the Google doc viewer API, but I have no definite answer yet and I may have missed something.
I can't use simple VIEW intents because I want to be able to show my app's branding on top of it and prevent the viewer from editing that file. Even some converter that reliably converts these file to HTML so I can show the file via webview would be fine.