Can you please clarify which feature you are referring to? There are a few different features within the Zoom client which present a similar experience to what you are describing.
Using the official Zoom mobile app, I select the user I want to call: it opens the chat screen.
On that screen, I click on the “camera” icon on the top right of the screen, and it initiates a vidéo call.
In the same time, I have my Android application using the Zoom SDK running, with the called account logged: I figured out how my application could be notified that an incoming call occurs ?
Thanks for clarifying. Since this feature only exists in the chat client, it will not work with the SDK. There may be a solution available through our webhooks, so it could be worth posting over in #api-and-webhooks to check.