XML文件未收到ListView的String []

I am new to android programming and am taking Udacity's courses to learn. They have me making a scrollable list of Strings using the ArrayAdapter and Listview, but the data inside my java class is not being passed through. Android studio shows the template of a list, and when I launch the app, I get a blank screen. The XML code that is supposed to receive the data is below, and it's called fragment_main.xmlI am new to android programming and am taking U