TabTest2 is the closest prototype on my end.  It has a splash screen, a ...

...check for login page (currently the bool is hardcoded to false), and three tabs:  conversations, contacts, and settings.  The data for each tab is hardcoded in the strings.xml resource folder.  The settings tab should not be a list, but I haven't yet figured out how to fix that.  If you select an item in a list, it directs you to the ChatActivity, and displays the item index number.The ChatActivity parent is the MainActivity.