# Instructions to make custom application

**URL:** <https://forums.rocket.chat/t/instructions-to-make-custom-application/12518>\
**Category:** Mobile Apps\
**Tags:** android\
**Created:** [November 1, 2021, 2:55pm UTC](https://forums.rocket.chat/t/instructions-to-make-custom-application/12518 "2021-11-01T14:55:59Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![sidubutt](https://avatars.discourse-cdn.com/v4/letter/s/e495f1/32.png) [@sidubutt](https://forums.rocket.chat/u/sidubutt)\
**Post date:** [November 1, 2021, 2:55pm UTC](https://forums.rocket.chat/t/instructions-to-make-custom-application/12518/1 "2021-11-01T14:55:59Z")

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hello.  
I created a jar file via link. I want to use rocket chat in my custom android app. I want to use java sdk but I know it was terminated in 2017. So I have to use Kotlin. I added the jar file to my project lib folder. There is no example of how to connect to Rocket Chat after this. Where can I find it? Help me.  
[DescargarN](https://descargarn.com/)