查询指定好友资料

OpenIMClient.getInstance().friendshipManager.getFriendsInfo(
    new OnBase<List<UserInfo>>() {
        @Override
        public void onSuccess(List<UserInfo> friends) {
            for (UserInfo friend : friends) {
                friendStore.put(friend.getUserID(), friend);
            }
        }

        @Override
        public void onError(int code, String error) {
            recordFriendInfoFailure(code, error);
        }
    },
    Arrays.asList("user_a", "user_b"),
    true
);