How to access data from my 1st android app to 2nd android app

Question

I created two android apps (app1 and app2). app1 stores data in sqllite using room persistent library. i would like to access / retrieve data of app1 from app2. i know that we can use content provider class to implement this scenario. however, not able to find any working example achieving the above.

it is worth mentioning that app2 would be an android service.

Thanks

I did not try anything.