Android中使用Parcelable传递对象，createFromParcel中对象的赋值次序

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

public class Person implements Parcelable {
	private String name = null;
	private String city = null;
	private int age = 0;

	@Override
	public int describeContents() {
		// TODO Auto-generated method stub
		return 0;
	}

	@Override
	public void writeToParcel(Parcel dest, int flags) {
		// TODO Auto-generated method stub
		dest.writeString(name);
		dest.writeString(city);
		dest.writeInt(age);
	}

	public static final Parcelable.Creator CREATOR = new Creator() {

		@Override
		public Person createFromParcel(Parcel source) {
			// TODO Auto-generated method stub
			Person p = new Person();
			//赋值次序依照writeToParcel
			p.name = source.readString();//----line1
			p.city = source.readString();//----line2
			p.age = source.readInt();    //----line3
			return p;
		}

		@Override
		public Person[] newArray(int size) {
			// TODO Auto-generated method stub
			return new Person[size];
		}
	};
}

    在createFromParcel方法中对新建对象p属性复制的时候，次序要依照writeToParcel方法中写入的次序，如果将line2和line1交换位置，在读取时得到的Person对象的name和city属性值将发生交换；如果将line3和line1交换位置，在读取时得到的Person对象的name和age属性值将错误