In a kotlin android project I was using objectbox 2.3.4 until now.
I don't want to upgrade this version because it's enough for me, so I want to have it locally in jar or aar file instead of downloading it from maven.
I don't know how to do it, I've tried several solutions but without success, can someone tell me what to do?
Clarification: jcenter was shutdown in August 2024, you want to use Maven Central now.
ObjectBox V2.3.4 was released 2019/03/19 (!). It is highly recommended to update to the latest version. Check the ObjectBox changelogs for a list of massive improvements and fixes since then.
So, I would try to see if upgrading to 4.0.2 (latest as of 2024/09) causes any trouble. ObjectBox was rather conservative with API changes, so chances are good that you have to make no or just little changes.
If that does not work for you, you could stay with a 2.x version. 2.9.1 is available on Maven Central.