Graphically Highlighting Resource File Parts and Their Usage in Code

I couldn't see what I needed to see in these two blocks of code, so I highlighted what I needed to see graphically.  What is shown is the layout file name are:

1. Where the xml file is defined (res/layout/main.xml) and where it's used in the setContentView(R.layout.main).
2. Where the GridView id is defined, and where the id is used to find the grid view.