java - 如何在Android上将对象从一项活动传递到另一项活动(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 .

(我正在尝试从一个Activity发送我的客户类的对象并将其显示在另一个Activity 。)

The code for the customer class:

(客户类的代码：)

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 .

(我想将其对象从一个Activity发送到另一个，然后在另一个Activity上显示数据。)

How can I achieve that?

(我该如何实现？)

  ask by kaibuki translate from so

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.

(一种选择是让您的自定义类实现Serializable接口，然后可以使用Intent#putExtra()方法的putExtra(Serializable..)变体在意图中额外传递对象实例。)

Pseudocode :

(伪代码 ：)

//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.

(注意：确保主自定义类的每个嵌套类都实现了Serializable接口，以避免任何序列化异常。)

For example:

(例如：)

class MainClass implements Serializable {

    public MainClass() {}

    public static class ChildClass implements Serializable {

        public ChildClass() {}
    }
}