what's different @android:id/list @+id/android:list?
<p>i see two listview xml code:</p>

<pre><code>&lt;ListView
    android:id="@android:id/list"
...
</code></pre>

<p>and</p>

<pre><code>&lt;ListView
    android:id="@+id/android:list"
</code></pre>

<p>whats different between those?</p>
