I was dealing with a project where I have multiple pages and they both deal with the same object. The object was saved in the cloud. I could retrieve this object from cloud anytime I want and in any page. But I wanted to reduce the number of calls I make to the cloud backend. Here is what I need to do

1)Retrieve the object from cloud once
2)Create my own domain model and transfer the data from the cloud object to it.
3)Make modification to the domain model based on user input in page 1.
4)When user action takes them to page 2, pass the domain model object to page 2.
5)Make modification to the same domain model in page 2
6)Then save the object back to cloud.

To achieve the object transfer from page 1 to page 2(or activity 1 to activity 2) we need to follow the below steps

1) Create a domain model which is serializable
2) Add the object to the intent
3) Retrieve the object from intent

Step 1: Creating Serializable Object


public class Event implements  Serializable {
	
	
	private String eventId;
	
	private String eventName;
	
	private String category;
}

You can implements the Serializable interface to make any object serializable.

Step 2: Add the Object to Intent


Event eventObj  = new Event();
Intent i = 	 Intent(Context packageContext, Class cls)
i.putExtra("Event", eventObj); 							
startActivity(i);

Step 3: Retrieve the object from Intent



Intent i = getIntent();
		
Event event = (Event) i.getSerializableExtra("Event");