android - How to know a user as moved to a new Card in a Google Glass app? -

is there way cardscrollview or cardscrolladapter let me know when user moves 1 card another?

initially using gesturedetector detect swipes left or right, in glass applications users can use, e.g., two-finger swipes pan , move distant card (or voice controls).

there must better way know when new card displayed track these directional events.

i know cardscrollview.getselecteditemposition() gives me current card in view, not when new card displayed.

i thought cardscrolladapter.getview() run every time new card displayed, in glass applications runs once in beginning of activity execution.

any great.

my glass somewhere in storage can't test can try ondetachedtowindow , onattachedtowindow. this:

private view buildview() {     cardbuilder card = new cardbuilder(this, cardbuilder.layout.text);      card.settext(r.string.whatever);      view view = card.getview();     view.addonattachstatechangelistener(new view.onattachstatechangelistener() {         @override         public void onviewattachedtowindow(view v) {          }          @override         public void onviewdetachedfromwindow(view v) {          }     });      return view; } 

also card lifecycle might give idea.