| Contact.UpdateListener | |
| WorkingMessage.MessageStatusListener | Callback interface for communicating important state changes back to ComposeMessageActivity. |
| Contact | |
| ContactList | |
| Conversation | An interface for finding information about conversations and/or creating new ones. |
| RecipientIdCache | |
| RecipientIdCache.Entry | |
| WorkingMessage | Contains all state related to a message being edited by the user. |