Android使用SAX解析XML(2)

school类包含了一个major列表，可以增加该列表的元素，以及返回该列表，还实现了Parcelable.Creator接口。

package com.hzhi.my_sax;

import java.util.ArrayList;

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

public class school implements Parcelable{

	public static final String tag_name = "School";

	public String name;
	public String code;
	public ArrayList<major> majors;

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

				@Override
				public school createFromParcel(Parcel in) {
					// TODO Auto-generated method stub
					return new school(in);
				}

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

			};

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

	@Override
	public void writeToParcel(Parcel arg0, int arg1) {
		// TODO Auto-generated method stub

	}

	// 实现Parcelable接口
	public school(Parcel in){

		this.name = in.readString();
		this.code = in.readString();

	}

	// 构造函数
	public school(String name, String code){

		this.name = name;
		this.code = code;
		this.majors = new ArrayList<major>();

	}

	// 增加专业
	public void add_major(major m){

		this.majors.add(m);

	}

	// 返回专业
	public ArrayList<major> get_majors(){
		return this.majors;
	}

	// 重写toString
	public String toString() {
		// TODO Auto-generated method stub
		return (getName());
	}

	public String getName() {

		if(this.name == null) {
			return ("(Default)");
		}

		return (this.name);

	}

}

major类包含了一个clas列表，可以增加该列表的元素，以及返回该列表，也实现了Parcelable.Creator接口。

package com.hzhi.my_sax;

import java.util.ArrayList;
import android.os.Parcel;
import android.os.Parcelable;

public class major implements Parcelable{

	public static final String tag_name = "Major";

	public String name;
	public String code;
	public ArrayList<clas> clases;

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

				@Override
				public major createFromParcel(Parcel in) {
					// TODO Auto-generated method stub
					return new major(in);
				}

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

			};

	@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(this.name);
		dest.writeString(this.code);

	}

	// 实现Parcelable接口
	public major (Parcel in){

		this.name = in.readString();
		this.code = in.readString();

	}

	// 构造函数
	public major(String name, String code){

		this.name = name;
		this.code = code;
		this.clases = new ArrayList<clas>();

	}

	public String getCode() {
		return (this.code);
	}

	public void add_clas(clas c) {
		this.clases.add(c);
	}

	public ArrayList<clas> get_clases() {
		return this.clases;
	}	

	// 重写toString
	public String toString() {
		// TODO Auto-generated method stub
		return (getName());
	}

	public String getName() {

		if(this.name == null) {
			return ("(Default)");
		}

		return (this.name);

	}

}

clas类就不用包含列表了，但还是需要实现Parcelable.Creator接口。

package com.hzhi.my_sax;

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

public class clas implements Parcelable {

	public static final String tag_name = "Class";

	public String name;
	public String code;

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

				@Override
				public clas createFromParcel(Parcel in) {
					// TODO Auto-generated method stub
					return new clas(in);
				}

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

			};

	@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(this.name);
		dest.writeString(this.code);

	}

	public clas(Parcel in){

		this.name = in.readString();
		this.code = in.readString();

	}

	public clas (final String name, final String code){

		this.name = name;
		this.code = code;

	}

	// 重写toString
	public String toString() {
		// TODO Auto-generated method stub
		return (getName());
	}	

	public String getName() {

		if(this.name == null) {
			return ("(Default)");
		}

		return (this.name);

	}

}

以上4个类中，tag_name是为了和XML文件中的节点名称对比，name和code分别对应XML文件中的name和code。4个类都要重写toString()方法，否则返回的就不是数据内容，而是一长串数字。