Intent extras aren't passed by reference?

Question

I have a Custom Type object that implements Serializable and i'm able to sucessfully pass this object through my Activities.

Now the situation is this:

On the Activity 1 the CustomObject instance has a String property with the value "A" set and is passed to the Activity 2 as an Extra:

Intent intent = new Intent(getApplicationContext(), Activity_2.class);
intent.putExtra("CUSTOM_OBJECT", customObjectInstance);

startActivityForResult(intent, 0);

On the Activity 2, i retrieve the CustomObject from the Intent and modify the property value from "A" to "B".

When i press the back button, going from Activity 2 back to Activity 1, the value on the CustomObject's property is "A" again!

I checked the object's hash code and have confirmed that is the same instance on both Activities, and still can't figure it out why this is happening.

EDIT:

As requested, about the code where i set the property value, it is as simple as it can be:

On Activity 2:

CustomObject obj = (CustomObject) getIntent().getExtras().getSerializable("CUSTOM_OBJECT");
obj.setProperty("B");

Answer 1

Intent's extras contain values only. You could handle parameters by reference by extending the Application class and deploying "global" variables.

Althought you express that both object's hash code is the same, i am pretty certain each Activity handles its own set of local variables. In your tests, objects in Activities A and B are independent of each other.

Hope it helps.