如何禁用以编程方式添加的ListView的默认选择

I am dynamically adding a listview in my activity layout. The problem I am facing is : when the listview is populated, it shows first item as selected and since I have used a selector, it highlights the default selection. I wish to know ,what needs to be added in code, so that none of the items is selected by default.I am dynamically adding a listview in my activi