| DriveEvent | Base interface implemented by all Drive event types. |
| DriveEvent.Listener<E extends DriveEvent> | Listens for Drive events of a particular type. |
| ResourceEvent | Base interface for DriveEvent types related to a specific resource. |
| ChangeEvent | Sent when a DriveResource has had a change to its Contents or Metadata. |
| DriveEventService | Abstract base class for an intent service that handles Drive events. |