解析Android中的Serializable序列化

package cc.test.serializable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FiLeoutputStream;
import java.io.IOException;
import java.io.objecTinputStream;
import java.io.objectOutputStream;
import java.util.ArrayList;
import android.app.Activity;
import android.os.bundle;
import android.os.Environment;
/**
 * Demo描述:
 * 将ArrayList<自定义数据>在SDCard上进行存取.
 *
 * Parcelable和serializable的区别:
 * 内存间数据传输时推荐使用Parcelable,如activity间传输数据
 * 比如:http://blog.csdn.net/lfdfhl/article/details/10961459
 * 保存到本地或者网络传输时推荐使用serializable
 */
public class TestserializableActivity extends Activity {
  @Override
  public void onCreate(Bundle savedInstanceStatE) {
    super.onCreate(savedInstanceStatE);
    setContentView(R.layout.main);
    testserializable();
  }
  private void testserializable() {
    FiLeoutputStream fiLeoutputStream=null;
    ObjectOutputStream objectOutputStream =null;
    FileInputStream fileInputStream = null;
    ObjecTinputStream objecTinputStream = null;
    ArrayList<student> studentsArrayList = new ArrayList<student>();
    student student = null;
    for (int i = 1; i < 5; i++) {
      student = new student(i,"小明" + i);
      studentsArrayList.add(student);
    }
    try {
      //存入数据
      File file = new File(Environment.getExternalStorageDirectory().toString()
                 + File.separator +"Test"+File.separator + "data.dat");
      if (!file.getParentFile().exists()) {
        file.getParentFile().mkdirs();
      }
      if (!file.exists()) {
        file.createNewFile();
      }
      fiLeoutputStream= new FiLeoutputStream(file.toString());
      objectOutputStream= new ObjectOutputStream(fiLeoutputStream);
      objectOutputStream.writeObject(studentsArrayList);
       //取出数据
      fileInputStream = new FileInputStream(file.toString());
      objecTinputStream = new ObjecTinputStream(fileInputStream);
      ArrayList<student> savedArrayList =(ArrayList<student>) objecTinputStream.readObject();
      for (int i = 0; i < savedArrayList.size(); i++) {
        System.out.println("取出的数据:" + savedArrayList.get(i).toString());
      }
    } catch (Exception E) {
      // TODO: handle exception
    }finally{
      if (objectOutputStream!=null) {
        try {
          objectOutputStream.close();
        } catch (IOException E) {
          e.printStackTrace();
        }
      }
      if (fiLeoutputStream!=null) {
        try {
          fiLeoutputStream.close();
        } catch (IOException E) {
          e.printStackTrace();
        }
      }
      if (objecTinputStream!=null) {
        try {
          objecTinputStream.close();
        } catch (IOException E) {
          e.printStackTrace();
        }
      }
      if (fileInputStream!=null) {
        try {
          fileInputStream.close();
        } catch (IOException E) {
          e.printStackTrace();
        }
      }
    }
  }
}

package cc.test.serializable;
import java.io.serializable;
public class student implements serializable {
  private Integer id;
  private String name;
  //注意定义此字段
  public static final long serialVersionUID = 9527L;
  public student() {
    super();
  }
  public student(Integer id,String Name) {
    super();
    this.id = id;
    this.name = name;
  }
  public Integer getId() {
    return id;
  }
  public void setId(Integer id) {
    this.id = id;
  }
  public String getName() {
    return name;
  }
  public void setName(String Name) {
    this.name = name;
  }
  @Override
  public String toString() {
    return "student [id=" + id + ",name=" + name + "]";
  }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://scheR_472_11845@as.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical" >
  <TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@String/Hello" />
</LinearLayout>