Android 通过(Parcelable)序列化ArrayList实现Activity间传递ArrayList

本文介绍如何在Android应用中从MainActivity向TestActivity传递包含Student对象的ArrayList，并展示了实现Parcelable接口进行序列化的具体步骤。

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需求:MainActivity跳转到TestActivity并将ArrayLis作为参数传递。

1）类Student的代码如下：

package com.example.testa;

import android.os.Parcel;
import android.os.Parcelable;

public class Student implements Parcelable{
	public Student(){}
	public Student (int _id, String _name){
		setId(_id);
		setName(_name);
	}
	private int id;
	private String name;
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	@Override
	public int describeContents() {
		return 2;
	}
	@Override
	public void writeToParcel(Parcel dest, int flags) {
		dest.writeInt(id);
		dest.writeString(name);
	}
	public static final Parcelable.Creator<Student> CREATOR =new Creator<Student>() {
		@Override
		public Student createFromParcel(Parcel source){
			Student student = new Student();
			student.id=source.readInt();
			student.name=source.readString();
			return student;
		}
		@Override
		public Student[] newArray(int size){
			return new Student[size];
		}

	};
}

2）MainActivity跳转页面并传递参数的代码如下

/*生成参数对象*/
		ArrayList<Student> items=new ArrayList<Student>();
		Parcel parcel=Parcel.obtain();
		Student item1=Student.CREATOR.createFromParcel(parcel);
		item1.setId(1);
		item1.setName("chad.cao");
		items.add(item1);
		Student item2=Student.CREATOR.createFromParcel(parcel);
		item2.setId(2);
		item2.setName("catherine.yu");
		items.add(item2);
		parcel.recycle();
		
	    Intent intent=new Intent(MainActivity.this, TestActivity.class);
	    intent.putParcelableArrayListExtra("students", items);
	    this.startActivity(intent);

3）TestActivity中获取参数的代码如下

Bundle bundle=this.getIntent().getExtras();
	    ArrayList<Student> items=bundle.getParcelableArrayList("students");