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

by TreKing » Sat, 17 Jul 2010 03:54:23 GMT

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I loves me some documentation:
 http://developer.android.com/guide/topics/ui/declaring-layout.html #id

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

by DanH » Sat, 17 Jul 2010 07:41:49 GMT

 In a nutshell, "@id/xxx" means use that pre-existing ID#.  "@+id/xxx"
means assign a new ID# to that symbol and then use the ID#.


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

by James Lee » Sat, 17 Jul 2010 09:22:47 GMT

 Thank you for your answer.
You're right.
@+xxxx does mean make new id.

I think It will be not working if I use @+id/android:list instread of
@id/android:list. \
But, It is also working. According to that document, ListActivity may
some error when it use @+id/android:list because we not use existed id
but add new id.

I don't know why it is working. ;(


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