The project PDFViewCtrlToolsV7 offers a UI that is not enough to be used "as is". The project CompleteReader has a MUCH better UI, but if I want to integrate only ViewerActivity and related stuff I must stripp too much from CompleteReader. It would be nice if you put the Viewer in a Library Projekt and all the other stuff like navigating through the files, etc. and stuff that are needed only by the App itself in a separate project. In this way it will be easy for us to update the code once you release a new version.