Leave a Group

Leave a Group

In order to stop receiving updates and messages for any particular joined group, you will have to leave the group using the leaveGroup() method.

Java

private String GUID = "GUID";

CometChat.leaveGroup(GUID, new CometChat.CallbackListener<String>() {
  @Override
  public void onSuccess(String successMessage) {
    Log.d(TAG, successMessage);
  }

  @Override
  public void onError(CometChatException e) {
    Log.d(TAG, "Group leaving failed with exception: " + e.getMessage());
  }
});

Kotlin

val GUID:String="GUID"

CometChat.leaveGroup(GUID,object :CometChat.CallbackListener<String>(){
  override fun onSuccess(p0: String?) {
    Log.d(TAG, "Group left successfully")
  }

  override fun onError(p0: CometChatException?) {
    Log.d(TAG, "Group leaving failed with exception: " + p0?.message)
  }
})

Parameter	Description
GUID	The GUID of the group you would like to leave

Once a group is left, the user will no longer receive any updates or messages pertaining to the group.

Real-time Group Member Left Events

In other words, as a member of a group, how do I know if someone has left it when my app is running?

If a user leaves a group, the members of the group receive a real-time event in the onGroupMemberLeft() method of the GroupListener class.

Java

CometChat.addGroupListener(UNIQUE_LISTENER_ID, new CometChat.GroupListener() {
  @Override
  public void onGroupMemberLeft(Action action, User leftUser, Group leftGroup) {
    Log.d(TAG, "User left");
  }
});

Kotlin

CometChat.addGroupListener(UNIQUE_LISTENER_ID, object : GroupListener() {
  override fun onGroupMemberLeft(action: Action?, leftUser: User?, leftGroup: Group?) {
    Log.d(TAG, "User left")
  }
})

Missed Group Member Left Events

In other words, as a member of a group, how do I know if someone has left it when my app is not running?

When you retrieve the list of previous messages if a member has left any group that the logged-in user is a member of, the list of messages will contain an Action message. An Action message is a sub-class of BaseMessage class.

For the group member left event, in the Action object received, the following fields can help you get the relevant information-

1. action - left
2. actionBy - User object containing the details of the user who left the group
3. actionFor - Group object containing the details of the group the user has left