拒绝好友申请

OpenIMClient.getInstance().friendshipManager.refuseFriendApplication(
    new OnBase<String>() {
        @Override
        public void onSuccess(String data) {
            // 拒绝好友申请成功
        }

        @Override
        public void onError(int code, String error) {
            // 处理错误
        }
    },
    applicantUserID,
    "暂不添加"
);