How to work with Background Task extension in my idea?

Or do I dont need it?
com.kumaraswamy.tasks.aix
[mod edit direct download link removed]
I want to make an app where when I turn on the phone, it will have an image and a button on it, when the button is pressed, it will have a lock screen.
I would be grateful for any help)

A post was merged into an existing topic: Can you help me with my idea?