I am creating a notepad android app that has different fonts to use. I am able to save the files as .txt but that extension does not save the font used so I was wondering if there is any way to save the file as .odt or .doc.
Thank you
Both the ODT and DOC format are relatively complex and are probably overkill for what you need.
However, if you wish to pursue that path, the most robust solution is to use a library like Aspose.Words.
What if you store your file as HTML? That would give you fonts and formatting with much less complexity.