Happy to help clarify. First, I should note that you’re correct—most of the actions you are looking to take require our APIs. Generally, our APIs are for pre- and post- meeting actions, while our SDKs allow you to manage in-meeting activity. Now, for each of your questions:
Which type of Zoom App should we use? JWT App pr oAuth App?
If you need to manage/access users outside of your own Zoom account, you will need to use an OAuth app.
Is it possible to get authorisation from user using Zoom’s Android SDK if we integrate SDK in our custom Android app?
Your authorization for API requests will need to come from either an OAuth or JWT app. If you’re using a JWT app’s credentials for your SDK implementation, but will need to access/manage user data outside your account, then you will need a separate OAuth app. If the user is under your account, you can use the same JWT credentials.