I'm looking for an Android library/UI control that can render a document (preferably OpenXML, but I'm open to RTF and lesser formats) and allow basic editing: deleting and typing. Formatting isn't really a concern. Cross-platform with iOS is an added bonus.
Free is always nice (even with draconian licensing), but I am open to reasonably priced solutions. Aspose.Words for $1000, is not reasonable for what I need (basic editing of one format).
The use case for this is that I'm generating a document, and the user might sometimes want to do some sanitizing, like entering line breaks to push a block of text onto the next page.
So far, the best I've come across is to use RTF and extend EditTExt, but it does not handle lists. I've heard of the Google Drive Realtime API, but it isn't obvious (to me, at least) whether or not they provide an editor that I can embed.