package com.example.day06_activity4;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

    public void btn_click(View view) {

        Intent intent = new Intent();

        intent.setClass(MainActivity.this, OtherActivity.class);

        // 创建一个Person对象，并通过intent传递到OtherActivity

        Person person = new Person("志明", 40, 333.3);

        intent.putExtra("person", person);

        startActivity(intent);

    }

}

package com.example.day06_activity4;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.TextView;

public class OtherActivity extends Activity {

    private TextView textview;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_other);

        textview = (TextView) findViewById(R.id.text);

        // 获得intent

        Intent intent = getIntent();

        Person person = intent.getParcelableExtra("person");

        String name = person.getName();

        int age = person.getAge();

        double weight = person.getWeight();

        textview.setText("姓名：" + name + ", 年龄：" + age + ", 体重：" + weight);

    }

}

package com.example.day06_activity4;

import android.os.Parcel;

import android.os.Parcelable;

public class Person implements Parcelable {

    private String name;

    private int age;

    private double weight;

    public Person() {

    }

    public Person(String name, int age, double weight) {

        super();

        this.name = name;

        this.age = age;

        this.weight = weight;

    }

    // getXxx()方法和setXxx()方法

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public double getWeight() {

        return weight;

    }

    public void setWeight(double weight) {

        this.weight = weight;

    }

    // 实现Parcelable接口中的抽象方法

    // describeContents()方法基本上直接返回0，就可以了

    public int describeContents() {

        return 0;

    }

    // 把需要序列化的参数写入out中

    public void writeToParcel(Parcel out, int flags) {

        out.writeString(name);

        out.writeInt(age);

        out.writeDouble(weight);

    }

    // 定义一个静态的属性CREATOR 是Parcelable.Creator的对象

    // 在该匿名内部类中，实现Parcelable.Creator中的两个方法(泛型参数为类名)

    public static final Parcelable.Creator<Person> CREATOR = new Parcelable.Creator<Person>() {

        // createFromParcel(Parcel in)

        // 对in进行反序列化(需要通过Person的构造器实现)

        public Person createFromParcel(Parcel in) {

            return new Person(in);

        }

        // newArray(Parcel in)

        // 反序列化多个元素时使用

        public Person[] newArray(int size) {

            return new Person[size];

        }

    };

    // 定义私有的构造器 从in中反序列对应的参数(反序列化参数的顺序必须与序列化参数的顺序保持一致)

    private Person(Parcel in) {

        name = in.readString();

        age = in.readInt();

        weight = in.readDouble();

    }

}