Changes in comments

                    mCheckBoxListListener.onStartDisplayingCheckBoxes();

                }

                getAdapter().toggleSelectionOfContactId(Long.valueOf(contactId));

                // Sending an accessibility event of TYPE_VIEW_CLICKED and forcing Talkback to be

                // performed on the checkbox.

                // We need to:

                // 1. consider the difference between position and adjPosition;

                // 2. make sure the list item is not null before sending the event.

                // Manually send clicked event if there is a checkbox.

                // See b/24098561.  TalkBack will not read it otherwise.

                final int adjPosition = position + getListView().getHeaderViewsCount();

                if (getListView() != null && adjPosition < getListView().getChildCount()) {

                    getListView().getChildAt(adjPosition).sendAccessibilityEvent(AccessibilityEvent