Saving data and list it in a list view.

I have three layout in this app. I would like to save the data that I have in the first layout to a database. And the second layout is supposed to show the list of files that I have saved in the database. I got a list view in the second layout, how do I make it so that the files can just add in to the database and show it in the list view in layout 2. Can anyone help me with this?

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