Based on my research till now. There is no Hangouts api for Android.
In addition, Skype uri for android is only for one to one video call.
Therefor, I used the ooVoo Video Chat SDK to import the group video chat in my application. For more information go to this link
https://developers.oovoo.com/docs[
^]
In addition, you can find other vendors that provide video chat SDK from this link
https://bloggeek.me/missing-webrtc-paas-report/[
^] .
Thanks,
z