Create an Android 3rd party app using Nextcloud Android library

I create an Android application and I want to connect it to the Nextcloud server, such as logging in, creating a new item, etc. Is there a way to do that using the Nextcloud Android library? I really don’t want to use SingleSignOn because it depends on the Nextcloud Files app.

I have CSRF check failed so that I cannot log in to server and call any APIs.

Why no one replies my post…