Events
Understand the event system for tracking changes in the status and relationships of friends.
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Most relationships don’t change often, but when there are changes, users want to know about them as soon as possible. The Friends SDK fetches all a user's relationships at startup, then keeps the list up-to-date using events.
The SDK sends events as soon as changes occur. User relationship changes that trigger an event include:
- A friend updates their presence status.
- The user adds a new relationship. A user creates a relationship or a
FRIEND_REQUESTis accepted creating aFRIEND_REQUESTrelationship.FRIEND - The user removes a relationship like a , a
FRIEND_REQUEST, or aFRIENDrelationship.BLOCK
You can use callbacks that run in response to notification events to subscribe the current user to notifications.
You can subscribe (and unsubscribe) to the following event types:
Parameter | Description |
|---|---|
| RelationshipAdded | Event invoked when a relationship involving the current user gets added. |
| RelationshipDeleted | Event invoked when a relationship involving the current user gets deleted. |
| PresenceUpdated | Event invoked when the presence of a member associated with the current user updates their presence. |
| MessageReceived | Event invoked when a user sends a message to the current user. |