Different IDEs are different. I take Android Studio as an example. After finding the interface, press control+H (mac) to view the specific implementation class. If you are not on a mac system, you can search for the Call Hierarchy shortcut key by pressing shift twice
In fact, there are tutorials everywhere, refer to this article to use Android Studio to import source code
However, if you are not lucky in compilation, you will encounter various problems, which can basically be solved with a lot of Google
The access interface is in the web background, not in your app project
Different IDEs are different. I take Android Studio as an example. After finding the interface, press control+H (mac) to view the specific implementation class. If you are not on a mac system, you can search for the Call Hierarchy shortcut key by pressing shift twice