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 ");