Whats the difference between ID of "parent" and "view"
<p>Whats the difference between "parent" and "view" in listeners call back methods. In onClick(View v)method, we use view.getId() to get the id of the view BUT in Spinner that doesn't work, we use parent.getId for the method "<code>onItemSelected(AdapterView&lt;?&gt; parent, View view, int position, long id)</code>".</p>

<p>I m also confused abt the "?" sign after AdapterView - "<code>AdapterView&lt;?&gt;</code>" 
Thanx</p>
