Question: In my react native app I have a background service which should start an `Activity`. I have made this activity using android SDK and everything is working fine. But I would like to build this activity using react native and also to be invoked from background service.

**How to implement this?**

To get it more clear... App consists of 2 activities and 1 service - first is main activity (RN) and second (SDK) is used to be invoked from service.

Answer: 
After my year experience it seems `react-navigation` or other app navigators (redux, etc.) has ability to route to specific screen and thus react native does not have to be split to more than one android activity.
Had you ever added Intent Flag?

just like:

```
Intent intent = new Intent(context,SecondActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

```