How to pass data from the interface to activity

First i want to create an interface activity with an add(+) button like this one here

[https://i.stack.imgur.com/Y0qVw.png]

And thw button takes me to another activity to enter the data and at the same time i want to delete the the add (+) button in the interface activity and shows the data i enter in the other activity like this one here

[https://i.stack.imgur.com/3PCX2.png]

I home someone can help me