Android中Parcelable的作用实例解析

import android.app.Activity;  
 
import android.content.Intent;  
 
import android.os.Bundle;  
import android.os.Parcelable;  
 
public class Test extends Activity {  
   
  @Override 
  public void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);  
    setContentView(R.layout.main);  
    Intent i = getIntent();  
    Person p = i.getParcelableExtra("yes");  
    System.out.println("---->"+p.name);  
    System.out.println("---->"+p.map.size());  
  }  
} 

import java.util.HashMap;  
 
import android.app.Activity;  
import android.content.Intent;  
import android.os.Bundle;  
 
public class TestNew extends Activity {  
   
  @Override 
  public void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);  
    setContentView(R.layout.main);  
    Intent intent = new Intent();  
    Person p = new Person();  
    p.map = new HashMap<String,String>();  
    p.map.put("yes", "ido");  
    p.name="ok";  
    intent.putExtra("yes", p);  
    intent.setClass(this, Test.class);  
    startActivity(intent);  
  }  
} 

import java.util.HashMap;  
import android.os.Parcel;  
import android.os.Parcelable;  
 
public class Person implements Parcelable {  
 
  public HashMap<String,String> map = new HashMap<String,String> ();  
    
  public String name ;  
  @Override 
  public int describeContents() {  
    return 0;  
  }  
  @Override 
  public void writeToParcel(Parcel dest, int flags) {  
 
    dest.writeMap(map);  
    dest.writeString(name);  
  }  
  public static final Parcelable.Creator<Person> CREATOR = new Parcelable.Creator<Person>() {  
//重写Creator
 
    @Override 
    public Person createFromParcel(Parcel source) {  
      Person p = new Person();  
      p.map=source.readHashMap(HashMap.class.getClassLoader());  
      p.name=source.readString();  
      return p;  
    }  
    @Override 
    public Person[] newArray(int size) {  
      // TODO Auto-generated method stub  
      return null;  
    }  
  };  
 
}