Android Basic Grammar R.java Class Questions!

When you create an id in the layout or place an image or an asset file in the resource directory, it automatically creates a field that fits it in R.java. These fields are created arbitrarily by the app to refer to resources.

The class is automatically created, so don't worry about it, and for the ID xxx we created, you can use the image yyy.jpg in the drawable directory of the resource directory as R.id.xxx.