Google has recently released Android 8 and 8.1 (Oreo), and yet another new version 9 (Pie), both with substantial changes to the operating system and built-in apps ... specific areas such as Permissioning, Security, Image handling and Settings have all been changed. While there is supposed to be backward compatibility, this is not the case for all apps.
To meet the challenge for offline PDF reading and PDF security Drumlin Security has developed a completely new Android reader, Javelin3 for Android. It is fully compatible with the latest versions of Android and Javelin3 will replace the existing Javelin for Android on the Google Play appstore, support for which will be discontinued. Javelin3 retains the same download and catalog functionality of the previous app, but with a new PDF viewer, a new security framework and much better integration for file downloading via email, web links and Dropbox.