selectable adapter

gistfile1.java

private Set<String> mSelectedContactNumbers = new HashSet<String>();

@Override
public void bindView(View view, Context context, final Cursor cursor)
{
    final String contactNumber = cursor.getString(cursor.getColumnIndex("contact_number"));
    view.setOnClickListener(new View.OnClickListener() 
    {
	@Override
	public void onClick(View v) 
	{
            if (!mSelectedContactNumbers.remove(contactNumber)) {
                 mSelectedContactNumbers.add(contactNumber);
            }
            notifyDataSetChanged();
	}
    });
    if (mSelectedContactNumbers.contains(contactNumber)) {
       view.setBackgroundColor(0xff333333);
    } else {
       view.setBackgroundColor(0);
    }
    createView(view, cursor);			
}