Storing objects’ data into a file on disk.Serializing objects means converting an object’s state to a byte stream and deserializing means reverting back a byte stream into a copy of the object. Now that we know why we are forced to use either Parcelable or Serializable in this situation, it’s time to find out about them. So, the OS instead of saving the reference of an object must save its values and it would be possible just by converting that object to the Parcelable or Serializable.
Also, in the case of PendingIntents, if the owing application is killed, the PendingIntent itself will remain usable from other processes that have been given it.
Therefore, with passing an instance of the object to the Bundle, when the process is changed, the reference of the object won’t be in the new process and it wouldn’t be possible to use that object. And by returning back the user to the app, the OS creates a new process for the application. “In case of transferring objects between Android components, why do we have to convert them to the Serializable or Parcelable?” When an application is in the background, its process may be killed by the OS in case of low memory. Before comparing Java Serializable and Android Pacelable together, let’s find the answer to this question.
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