MultiChoiceMode before API 11

i implement the ActionMode in my Android App with ActionBarSherlock. With ABS it is possible to build a ActionMode before API 11 but the easy way with: listView.setMultiChoiceModeListener( new MultiChoiceModeListener() ... is not for app before API 11. Has anybody a good way to build a Action Mode Context Menu before API 11? I want to make a long click on a List Item and start the ActionMode in which i can click multiple items. On a simple click i show a detail site of the list item. I use the registerForContext() method but this make a simple and long click.

Has anybody a good tip for me.

EDIT
The solution for my question was following: On a long item click i active the action mode and save this in a variable. In the on item click method i implement a if-else statement with:

if( actionMode == null )
{
   // open new activity or update second fragment
   showDetails( itemPosition );
}
else
{
   // update ui or close CAB if no item selected
   showCAB( itemPosition );
}

The method showCAB( position ) update the selectedItem count, highlight item background and so on.