Android : from list of events, how to find first event's start time has reached current time

Question

In my app, I've list of events scheduled in next 5 days which are in ascedning order based on Start time. Now I want to display next upcoming task in my app. So my problem is if event's start time is matching current system time, then i want to remove that event from event list and next event should be on displayed in my activity as next upcoming event.

 E.g :
 Event1 2pm to 4pm.
 Event2 5pm to 6pm.
 Event3 8pm to 9pm.

 ArrayList<Event> allEvents;
 // Populate all Event data with event title and start time.
 Event = allEvents.get(0);
 Long top_event_start_time = Event.get_start_time();

Activity shows Event1 "Event1 scheduled at 2 pm". At 2 pm I want activity to display Event2.

Please suggest which method would be appropriate.