| ActivityListener | Listener class for activity updates. |
| ActivityMonitor | Activity Monitor. |
| ApplicationListener | Listener for application foreground and backgrounds. |
| FilteredActivityListener | Activity listener that filters events with a predicate. |
| ForwardingActivityListener | Activity listener that forwards activity events to a list of listeners. |
| ForwardingApplicationListener | Activity listener that forwards application events to a list of listeners. |
| GlobalActivityMonitor | Global activity monitor. |
| SimpleActivityListener | A convenience class to extend when you only want to listen for a subset of of activity events. |
| SimpleApplicationListener | A convenience class to extend when you only want to listen for a subset of of application events. |