Before compiling and running the app, we need to setup the Opentok Configuration.
In the MainActivity.kt file, change the apiKey, sessionId and token to your own token.
When the application starts, it will attempt to connect to the Opentok session.
Once it is connected, you can click on the Start Camera or Start Screenshare button to start either the camera or the screenshare and publish to the opentok session.
When you are done with the session, click on the Disconnect button to disconnect and close the app.
This screenshare uses the Android MediaProjection approach to obtain the screen content from the OS. The screen frames are then rotated/flipped and sent out to WebRTC using a Custom Video Device (CustomVideoCapturer.kt).
Note: MediaProjection API needs to be running as a foreground service (not activity). Therefore, the frame data are passed back to the activity via a Binder.
Credits to the Customer Solutions Engineering team from the Vonage API Platform.