What is different between @+id/android:list and @id/android:list?

Question

I\'ve develop android application, and one question.

As you know, When we use LiveActivity, we must specify @id/android:list for ListView ID.

But, When I us

Answer 1

In response to What is different between @+id/android:list and @id/android:list?:

It seems that there are two ways to reference to the platform id android.R.id.list: @android:id/list and @id/android:list. The ListActivity documentation shows both (the first one in text, second in the example) but does not clarify if there's any difference.

The @+id/android:list as the ListView's id seems to work too. I assume that what happens here is that a copy of the android.R.id.list identifier is added to the application's own ID list.

In my opinion @android:id/list is the clearest way for referencing to android.R.id.list.