The polling interval increases exponentially each time polling is unsuccessful, up to a maximum of 60 minutes. The interval is reset to 2 minutes whenever a connection is made and whenever Bluetooth is re-enabled.

Psycho killer, qu'est-ce que c'est?

This commit renames identicons to avatars in field names, and uses an ImageView
derivative to show the identicons, which should make implementing #214 easier.

Source: https://github.com/saiimons/Android-Identicons
License: Apache License, Version 2.0

Also removed unnecessary adapter notifications in various places.

Whether or not a class needs to run as a service is an implementation decision.