Over 6 years ago, I launched dAmnMessenger with the intention of bringing the deviantART Message Network to Android phones everywhere where people could about art and engage in their community. While it served its purpose in some ways, it unfortunately didn't get as much traction as I had hoped, and I noticed that a lot of deviants switched their no longer use dAmnMessenger. At it's peak, dAmnMessenger had 1000 simultaneous installs, but now it is well bellow 500 and active installs would be much lower.
Today, I have unpublished dAmnMessenger from Google Play. Over the past month, deviantART had upped their server version and unfortunately that small change has broken dAmnMessenger.
As time goes on, I plan on focusing on other projects, which sadly no longer are associated with deviantART. Sorry for this bad news, but unfortunately my codebase is too out of date to get to compile. Maybe one day I can bring it back.
If you have an iDevice, check out Pickley's iOS app: dAmnMobile 3.