How to Add Item into List View from Toast message?

Question

I working an App where In my MainActivity I added Toast message which display highest Loaded events. 

e.g: In MainActivity

•  Toast.makeText(this, "Load Events" + this.events.size(), Toast.LENGTH_LONG).show();

Now, Next part when above toast message appear on the MainActivity screen it will add that event into SecoendActivity Listview 

• How do i add toast message event into second activity listview?
• will Mainactivity to SecondActivity?