BlackBlind

may be you will mistake somewhere because In this code using FUSED LOCATION API . You can read [here ](https://developers.google.com/location-context/fused-location-provider/)about fused location api

In if condition is checking your app is in foreground or background after that it runs a method.

its working when two user have same room then it will connect both user with each other after some delay time..

try to change lower level dependency.

may be all user have to join same roam

startActivityForResult is not working in api level 11 so you have to update your code from documentation.

add jcenter() in settings.gradle

you can just change "O" with 28 .That will work for you.