Remove group members

kickGroupMember() accepts a list of member IDs and a removal message.

OpenIMClient.getInstance().groupManager.kickGroupMember(new OnBase<String>() {
    @Override public void onSuccess(String data) { /* The request completed. */ }
    @Override public void onError(int code, String error) { /* code and error describe the failure. */ }
}, groupID, memberUserIDs, "No longer participating in this project");

A successful callback means that the removal request completed; it does not mean that every client has updated its UI. onGroupMemberDeleted provides the removed member's GroupMembersInfo. Remove the member state by groupID:userID. See Group overview for the complete listener setup.