Sitemap

What is the difference between Parcelable and Serializable in Android?

Parcelable is a more efficient way to serialize an object while Serializable is the default way to do it. Parcelable objects are not compressed and can be sent over network without any problem. Serializable objects, on the other hand, are compressed and can only be sent over network if they have been pre-compressed.The main difference between Parcelable and Serializable is that Parcelable objects are not compressed whereas Serializable objects are. Another difference between these two types of object is that Parcelable objects can be sent over network without any problem whereas Serializable objects cannot.

Which one is more efficient?

There is no definitive answer to this question as it depends on the specific scenario in which you are using either type of class. However, a general rule of thumb is that serializable classes are more efficient than parcelable classes when it comes to processing and memory usage.

Serializable classes allow objects to be stored in a database or other storage location, and then retrieved later without having to worry about losing any data. This is because serialization simply copies the object’s fields into a byte array, which can then be stored on disk. Parcelable classes, on the other hand, do not allow objects to be stored outside of the application context (i.e., they cannot be persisted). Instead, each object instance is created directly when it is needed by the code running inside of an Android app. This means that there may be more overhead involved in creating and managing parcelable objects than serializable objects. However, this also means that if an app needs to access an object that has been saved as a serialized form, it will need to first deserialize the object before doing anything else.

Ultimately, it depends on your specific use case whether serialization or parcelation will be more efficient for your application. If you have questions about how best to optimize your code for performance purposes, please contact our technical support team at 1-800-237-4443 or visit our website at

.

Why would you use Parcelable over Serializable?

There are a few reasons why you might choose Parcelable over Serializable. First, Parcelable is more efficient when it comes to memory usage. Second, it allows your code to be more modular and reusable. Finally, if you need to pass objects between threads or processes, Parcelable is the better option because it supports thread-safe communication.

How do you make a class Parcelable?

When you create a class that is Parcelable, the Android platform will automatically take care of serializing and deserializing your object into and out of byte arrays. This means that any changes you make to your object while it is in a Parcelable state will be reflected in the bytes that are sent across the network or stored on disk.

There are two ways to make a class Parcelable: by using the @Parcelize annotation or by using the parcel() method of the ObjectOutputStream class. The following example shows how to use both methods to create a simple class that is Parcelable.

@Parcelize public class MyClass { }

ObjectOutputStream parcel(MyClass myClass) { return new ObjectOutputStream(new FileOutputStream("myfile.parceled"), MODE_WRITE); }

MyClass myObj = new MyClass(); // Create an instance of MyClass and set its properties parcel().writeString("Hello, world!"); // Write some data to the stream myObj.setName("John"); // Read back some data from the stream System.out.println(parcel().readString()); // Prints "Hello, world!" }

In this code, we first use the @Parcelize annotation on our MyClass class to tell Android what type of object it is (in this case, it's a Parcelable). We then create an ObjectOutputStream instance and pass in our MyClass object as one of its arguments. Finally, we write some data to our My Class instance and read back some data from it using System.out . In both cases, Android will take care of serializing and deserializing our object for us so that we can work with it as if it were just another primitive Java type (like int or String ). Note that if you want to override any of these default behaviors for your own classes, you can do so by using either the @Parcellize annotation or the parcel() method on ObjectOutputStream .

What are some of the benefits of using Parcelable?

Serializable is a newer Android Parcelable class that offers some benefits over the older Parcelable class. Here are some of the benefits:1. Serialization can be performed in parallel, which can improve performance2. Serialization does not require reflection3. The fields in a serialized object can be accessed using dot notation4. Fields that are not serializable will still be accessible from within an application5. If a field is not serializable, it will be skipped during deserialization6. A deserialized object will always contain all of its fields7. Deserialization is faster than serialization8. There is no need to create an instance of the Parcelable class before using it9. It is possible to pass objects that are not instances of Parcelable10. Objects that are instances of Parcelable but do not implement any specific interface can also be used asparcelables11. It is possible to use generics with Parcelable12. An instance of Parcelable can be passed as an argument to another method13.. When passing an instance ofParcelable as an argument to a method, the receiver must ensure that the object has been initialized14.. If a method expects an instanceofParcelable, it should instead cast the argument toParcelable15.. To avoid problems when working with custom marshalers, make sure your code usesthe appropriate constructor16.. To create and initialize a new Parceler object, use this syntax:new Parceler(someObject);17.. To get information about a particular field in an object, use this syntax:Parceler parceler = myObject .getParceler();18.. The following methods are available on all objects that implementParceler:getSize(), getBytesWritten(), and getType().19... The following methods are available only on objects that implementSerializable:isSerializable(), writeToFile(), and readFromFile().20... You cannot create or initialize a new ObjectOutputStream directly; you must first createan OutputStream and then call its constructor with the correct parameters21.... When writing data to disk using ObjectOutputStream::writeToDisk()or ObjectOutputStream::write()you must specify one or more file name arguments22.... When reading data from disk using ObjectInputStream::readFromDisk()orObjectInputStream::read()youmust specify one or more file name arguments23.... There are two ways to access files on diskusing FileReaderand FileWriter24...... A singleton implementationof FileReadercan be created by calling

public static final Class PARCELLABLE extends BaseClass implements Serializable { // constructors public PARCELLABLE ( Context context , int size ); public PARCELLABLE ( Context context , byte [] bytes ); // properties public int size ; } // interfaces public interface ISerializable { void writeToFile ( String filename ); void readFromFile ( String filename ); } // generic types @SuppressWarnings ({ "unchecked" }) @Generic T > private final Class T > type ; /** * Creates and initializes a new parcelable */ public PARCELLABLE () { super (); this . type = null ; } /** * Creates and initializes a new parcelable with given type */ protected PARCELLABLE ( Class T > type ) { this . type = type ; } /** * Gets the size of the parcel */ public int getSize () { return this . type != null ? this . type . getSize () : 0 ; } /** * Writes bytes into given stream */ protected void writeToFile ( String filename , byte [] bytes ) throws IOException { try { if (! Files . exists ( filename )){ Files . createDirectories ( filename , true );} InputStream input = Filesystems . openReadOnly (( Path )filename); output = new ObjectOutputStream (( OutputStream )input); output .

Are there any drawbacks to using Parcelable?

There are a few drawbacks to using Parcelable. The first is that it can be more difficult to write code that is both efficient and reliable. Because Parcelable objects are created on the fly, there is a greater chance of errors occurring when they're used. Additionally, because Parcelable objects are not serializable, they cannot be sent over the network or stored in a database. Finally, because Parcelable objects are not thread-safe, they should only be used in situations where there is no risk of multiple threads accessing the same object at the same time.

How does Parceling work in Android?

Serialization is the process of turning an object into a stream of bytes that can be stored in a computer memory. This happens when you want to save an object so that it can be reloaded at a later time, or sent over a network. Parcelable objects are automatically serialized when they're created. Serializable objects must be explicitly serialized using theSerialize() method.Parcelable objects offer several advantages over serializable objects:They're faster to create and load because they don't require conversion into bytes before being used.

They're easier to work with because they allow you to specify which fields should be serialized and deserialized.

They're more efficient because they don't require extra processing when they're loaded from memory or sent over the network.

Serialization is often used in conjunction with deserialization, which is the process of converting bytes back into an object. When you use deserialization, Android tries to find an instance of the class that was saved as a byte stream and uses that instance instead of creating a new one.

To learn more about Parceling and Serialization in Android, check out this guide:

.

What is the advantage to using reflection with regard to parceling objects?

There are a few advantages to using reflection with regard to parceling objects. One advantage is that it can be more efficient than code written directly in Java. Another advantage is that you can use reflection to access the properties and methods of an object even if you do not have access to the object's class file. Finally, using reflection allows you to customize how an object is parceled out across multiple processes or devices.