Activity 之间 传递 List 封装的对象或者对象

项目中遇到 从也个页面向还有一个页面跳转传递一个List 封装的对象 。按网上查的资料 须要把 对象 实现 Serializable接口。

写了一下。可是跳转直接崩溃。一直看错误之日找不到原因后来自习教案代码，发现bean里面还有其它bean。对象里的对象没有 进行序列化。记录分享一下。

代码例如以下：

两个Bean 文件

import java.io.Serializable;
import java.util.List;

/**

* ${JHS}
*/

public class KnowledgeClassifyChildBean implements Serializable {

/**
* 知识点ID  *
*/
public String knowledgeId;
/**
* 知识点名称
*/
public String knowledgeName;
/**
* 知识点题数
*/
public int Sum;
public boolean isSelect = false;

}

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

/**

* ${JHS}
*/

public class KnowledgeClassifyBean implements Serializable {

/*
{
"knowledgeId": 387,//知识点ID
"knowledgeName": "认识立体几何图形",//知识点名称
"Sum":15 //知识点题数
*/
private static final long serialVersionUID = 1L;

/**
* 章节ID  *
*/
public String chapterId;
/**
* 章节名称
*/
public String chapterName;
public boolean isSelect = false;
<span style="background-color: rgb(255, 0, 0);"> public List<KnowledgeClassifyChildBean> knowledgeList = new ArrayList<KnowledgeClassifyChildBean>();</span>

}

Activity 之间传 List<KnowledgeClassifyBean >

KnowledgeClassifyBean mKnowledgeClassifyBean ;

List<KnowledgeClassifyBean> knowledgeClassifyBeanList = new ArrayList<KnowledgeClassifyBean>();

for (int i = 0; i < 6; i++) {

mKnowledgeClassifyBean = new KnowledgeClassifyBean();

mKnowledgeClassifyBean.chapterName = "章节名称 " + i + i;

for (int j = 0; j < 6; j++) {

KnowledgeClassifyChildBean mKnowledgeList = new KnowledgeClassifyChildBean();

mKnowledgeList.knowledgeName = " 名称 " + j;

mKnowledgeClassifyBean.knowledgeList.add(mKnowledgeList);

}

knowledgeClassifyBeanList.add(mKnowledgeClassifyBean);

}

Intent intent = new Intent(A.this, B.class);

if (knowledgeClassifyBeanList != null) {

intent.putExtra("knowledgeClassifyBeanList", (Serializable) knowledgeClassifyBeanList);

startActivity(intent);

}

B这边 Activity 接收

Intent intent = getIntent();
List<KnowledgeClassifyBean> knowledgeClassifyBeanList  = (  List<KnowledgeClassifyBean>) intent.getSerializableExtra("knowledgeClassifyBeanList");
Log.i("-----knowledge--" ,knowledgeClassifyBeanList.size() + "");

Activity 之间传递对象也是实现 Serializable 接口

KnowledgeClassifyBean knowledgeClassifyBean = new KnowledgeClassifyBean();

intent.putExtra("knowledgeClassifyBean ",
knowledgeClassifyBean );

接收的Activity

Intent intent = getIntent();

KnowledgeClassifyBean knowledgeClassifyBean =

（KnowledgeClassifyBean
)intent.getSerializableExtra("knowledgeClassifyBean ");