Question on ListView

[Joe San]

Guys,

Why is this difference in the ListView and TextView. For example, to get a reference to the TextView in my Activity class, I use the findViewById method and pass in the name of the TextView that I have given in my layout xml. But the id for a ListView looks completely difference and also to obtain a ListView in my Activity, I use something like android.R.id.list instead of mentioning the layout xml file?