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。

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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。

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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。

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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。