android - How to pass an Arraylist of Events through an Intent -

i'm trying pass list of events 1 activity 1 using intent, how tried it:

on activity 1:

arraylist<event>  eventsselected= new arraylist(); eventsselected.add(new event(color.red, dateclicked.gettime(), "event1")); eventsselected.add(new event(color.red, dateclicked.gettime(), "event2")); eventsselected.add(new event(color.red, dateclicked.gettime(), "event3")); intent = new intent(firstactivity.this, secondactivity.class); i.putextra("eventsselected", eventsselected); startactivity(i); 

but didn't find how on second activity, tried way didn't work :

on activity 2:

intent intent = getintent(); arraylist<event> selecteddates = intent.getstringarraylistextra("eventsselected"); 

you need implements serializable object class

public class event implements  serializable { } 

also

i.putextra("eventsselected",eventsselected);