How to pass an object from one activity to another on Android

Question

I am trying to work on sending an object of my customer class from one Activity and display it in another Activity.

The code for the customer class:

public class Customer {      private String firstName, lastName, Address;     int Age;      public Customer(String fname, String lname, int age, String address) {          firstName = fname;         lastName = lname;         Age = age;         Address = address;     }      public String printValues() {          String data = null;          data = "First Name :" + firstName + " Last Name :" + lastName         + " Age : " + Age + " Address : " + Address;          return data;     } } 

I want to send its object from one Activity to another and then display the data on the other Activity.

How can I achieve that?

Answer 1

One option could be letting your custom class implement the Serializable interface and then you can pass object instances in the intent extra using the putExtra(Serializable..) variant of the Intent#putExtra() method.

Pseudocode:

//To pass: intent.putExtra("MyClass", obj);  // To retrieve object in second Activity getIntent().getSerializableExtra("MyClass"); 

Note: Make sure each nested class of your main custom class has implemented Serializable interface to avoid any serialization exceptions. For example:

class MainClass implements Serializable {      public MainClass() {}      public static class ChildClass implements Serializable {          public ChildClass() {}     } } 

Answer 2

Implement your class with Serializable. Let's suppose that this is your entity class:

import java.io.Serializable;  @SuppressWarnings("serial") //With this annotation we are going to hide compiler warnings public class Deneme implements Serializable {      public Deneme(double id, String name) {         this.id = id;         this.name = name;     }      public double getId() {         return id;     }      public void setId(double id) {         this.id = id;     }      public String getName() {         return this.name;     }      public void setName(String name) {         this.name = name;     }      private double id;     private String name; } 

We are sending the object called dene from X activity to Y activity. Somewhere in X activity;

Deneme dene = new Deneme(4,"Mustafa"); Intent i = new Intent(this, Y.class); i.putExtra("sampleObject", dene); startActivity(i); 

In Y activity we are getting the object.

Intent i = getIntent(); Deneme dene = (Deneme)i.getSerializableExtra("sampleObject"); 

That's it.