Currently, there are many features of the android viewer are either not implemented or not working properly. For instance theres no option for neither priting the documents nor exporting to pdf. Also tile rendering is working extremely slow and sometimes it causes a crash especially on Calc documents. I have some ideas to this rendering problem such as using cache because i noticed the android viewer renders the same tiles over and over again even tho they are not changed while the zoom is the same. Maybe we dont need to use cache to fix this maybe some other mechanism can be implemented to prevent this from happening which is why I need a mentor :). There are a lot of work to do not just these two of them of course. I hope you guys accept my proposal so that we can start working on it.