实例教程四：采用Pull解析器解析和生成XML内容

Android——activity生命周期Demo
http://www.eoeandroid.com/thread-207556-1-1.html

Android——service生命周期Demo
http://www.eoeandroid.com/thread-207558-1-1.html

android spinner 基础小实例
http://www.eoeandroid.com/thread-207188-1-1.html

<?xml version="1.0" encoding="utf-8"?>
 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 
    android:layout_width@H_502_12@="fill_parent"
 
    android:layout_height@H_502_12@="fill_parent"
 
    android:orientation@H_502_12@="vertical" >
 

    <TextView
 
        android:layout_width@H_502_12@="fill_parent"
 
        android:layout_height@H_502_12@="wrap_content"
 
        android:text@H_502_12@="@string/hello" />
 

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
 
<resources>
 

    <string name="hello">Hello World,MainActivity!</string>
 
    <string name="app_name">XML解析</string>
 

</resources>

在src下新建的Person.xml

<?xml version="1.0" encoding="UTF-8"?>
 
<persons>
 
    <person id="23">
 
        <name>LiMing</name>
 
        <age>30</age>
 
    </person>
 
    <person id="20">
 
        <name>ZhangSan</name>
 
        <age>25</age>
 
    </person>
 
</persons>

package@H_502_12@ cn.itcast.domain;
 

@H_502_12@public@H_502_12@ class@H_502_12@ Person {
 
        @H_502_12@private@H_502_12@ Integer id;
 
        @H_502_12@private@H_502_12@ String name;
 
        @H_502_12@private@H_502_12@ Integer age;
 
        
        @H_502_12@public@H_502_12@ Integer getId() {
 
                @H_502_12@return@H_502_12@ id;
 
        }
 
        @H_502_12@public@H_502_12@ void@H_502_12@ setId(Integer id) {
 
                @H_502_12@this@H_502_12@.id = id;
 
        }
 
        @H_502_12@public@H_502_12@ String getName() {
 
                @H_502_12@return@H_502_12@ name;
 
        }
 
        @H_502_12@public@H_502_12@ void@H_502_12@ setName(String name) {
 
                @H_502_12@this@H_502_12@.name = name;
 
        }
 
        @H_502_12@public@H_502_12@ Integer getAge() {
 
                @H_502_12@return@H_502_12@ age;
 
        }
 
        @H_502_12@public@H_502_12@ void@H_502_12@ setAge(Integer age) {
 
                @H_502_12@this@H_502_12@.age = age;
 
        }
 
        
        @Override
 
        @H_502_12@public@H_502_12@ String toString() {
 
                @H_502_12@return@H_502_12@ "Person [id=" + id + ",name=" + name + ",age=" + age + "]";
 
        }
 
        
        @H_502_12@public@H_502_12@ Person(){
 
                
        }
 
        
        @H_502_12@public@H_502_12@ Person(Integer id,String name,Integer age) {
 
                @H_502_12@super@H_502_12@();
 
                @H_502_12@this@H_502_12@.id = id;
 
                @H_502_12@this@H_502_12@.name = name;
 
                @H_502_12@this@H_502_12@.age = age;
 
        }                
}
 @H_502_12@

package@H_502_12@ cn.itcast.xml;
 

@H_502_12@import@H_502_12@ android.app.Activity;
 
@H_502_12@import@H_502_12@ android.os.Bundle;
 

@H_502_12@public@H_502_12@ class@H_502_12@ MainActivity extends@H_502_12@ Activity {
 
    @H_502_12@/**@H_502_12@ Called when the activity is first created. @H_502_12@*/@H_502_12@
 
    @Override
 
    @H_502_12@public@H_502_12@ void@H_502_12@ onCreate(Bundle savedInstanceState) {
 
        @H_502_12@super@H_502_12@.onCreate(savedInstanceState);
 
        setContentView(R.layout.main);
 
    }
 
}@H_502_12@

package@H_502_12@ cn.itcast.service;
 

@H_502_12@import@H_502_12@ java.io.InputStream;
 
@H_502_12@import@H_502_12@ java.io.OutputStream;
 
@H_502_12@import@H_502_12@ java.util.ArrayList;
 
@H_502_12@import@H_502_12@ java.util.List;
 

@H_502_12@import@H_502_12@ org.xmlpull.v1.XmlPullParser;
 
@H_502_12@import@H_502_12@ org.xmlpull.v1.XmlPullParserFactory;
 
@H_502_12@import@H_502_12@ org.xmlpull.v1.XmlSerializer;
 

@H_502_12@import@H_502_12@ android.util.Xml;
 

@H_502_12@import@H_502_12@ cn.itcast.domain.Person;
 

@H_502_12@public@H_502_12@ class@H_502_12@ PersonService {
 
        
        @H_502_12@/**@H_502_12@
 
         * 获取数据
 
         * @H_502_12@@param@H_502_12@ xml
 
         * @H_502_12@@return@H_502_12@
 
         * @H_502_12@@throws@H_502_12@ Exception
 
         @H_502_12@*/@H_502_12@
 
        public@H_502_12@ static@H_502_12@ List<Person> getPerson(InputStream xml) throws@H_502_12@ Exception{
 
                List@H_502_12@<Person> persons = null@H_502_12@;
 
                Person person @H_502_12@= null@H_502_12@;
 
                
                @H_502_12@//@H_502_12@第一种写法
 
@H_502_12@//@H_502_12@                XmlPullParser pullParser = XmlPullParserFactory.newInstance().newPullParser();
 
                @H_502_12@//@H_502_12@第二种写法@H_502_12@
 
                XmlPullParser pullParser @H_502_12@= Xml.newPullParser();
 
                
                pullParser.setInput(xml,@H_502_12@"UTF-8"); //@H_502_12@为Pull解析器设置要解析的XML数据@H_502_12@
 
                int@H_502_12@ event = pullParser.getEventType();
 
                @H_502_12@while@H_502_12@(event != XmlPullParser.END_DOCUMENT){
 
                        @H_502_12@switch@H_502_12@(event){
 
                        @H_502_12@case@H_502_12@ XmlPullParser.START_DOCUMENT:
 
                                persons @H_502_12@= new@H_502_12@ ArrayList<Person>();
 
                                @H_502_12@break@H_502_12@;
 
                                
                        @H_502_12@case@H_502_12@ XmlPullParser.START_TAG:
 
                                @H_502_12@if@H_502_12@("person".equals(pullParser.getName())){
 
                                        @H_502_12@int@H_502_12@ id = new@H_502_12@ Integer(pullParser.getAttributeValue(0));
 
                                        person @H_502_12@= new@H_502_12@ Person();
 
                                        person.setId(id);
 
                                }
 
                                @H_502_12@if@H_502_12@("name".equals(pullParser.getName())){
 
                                        String name @H_502_12@= pullParser.nextText();
 
                                        person.setName(name);
 
                                }
 
                                @H_502_12@if@H_502_12@("age".equals(pullParser.getName())){
 
                                        @H_502_12@int@H_502_12@ age = new@H_502_12@ Integer(pullParser.nextText());
 
                                        person.setAge(age);
 
                                }
 
                                @H_502_12@break@H_502_12@;
 
                                
                        @H_502_12@case@H_502_12@ XmlPullParser.END_TAG:
 
                                @H_502_12@if@H_502_12@("person".equals(pullParser.getName())){
 
                                        persons.add(person);
 
                                }
 
                                @H_502_12@break@H_502_12@;
 
                        }
 
                        event @H_502_12@= pullParser.next();
 
                }
 
                
                @H_502_12@return@H_502_12@ persons;
 
        }
 
        
        @H_502_12@/**@H_502_12@
 
         * 保存数据到XML文件中
 
         * @H_502_12@@param@H_502_12@ persons 数据
 
         * @H_502_12@@param@H_502_12@ out 输出方向 
         * @H_502_12@@throws@H_502_12@ Exception
 
         @H_502_12@*/@H_502_12@
 
        public@H_502_12@ static@H_502_12@ void@H_502_12@ save(List<Person> persons,OutputStream out) throws@H_502_12@ Exception{
 
                XmlSerializer serializer @H_502_12@= Xml.newSerializer(); //@H_502_12@得到序列化器@H_502_12@
 
                serializer.setOutput(out,@H_502_12@"UTF-8");
 
                serializer.startDocument(@H_502_12@"UTF-8",true@H_502_12@); //@H_502_12@true--是否该文件单独存在 @H_502_12@
                serializer.startTag(null@H_502_12@,"persons");
 
                
                @H_502_12@for@H_502_12@(Person person : persons){
 
                        serializer.startTag(@H_502_12@null@H_502_12@,"person");
 
                        serializer.attribute(@H_502_12@null@H_502_12@,"id",person.getId().toString());
 
                        
                        serializer.startTag(@H_502_12@null@H_502_12@,"name");                        
                        serializer.text(person.getName());
 
                        serializer.endTag(@H_502_12@null@H_502_12@,"name");
 
                        
                        serializer.startTag(@H_502_12@null@H_502_12@,"age");                        
                        serializer.text(person.getAge().toString());
 
                        serializer.endTag(@H_502_12@null@H_502_12@,"age");
 
                        
                        serializer.endTag(@H_502_12@null@H_502_12@,"person");
 
                }
 
                
                serializer.endTag(@H_502_12@null@H_502_12@,"persons");
 
                serializer.endDocument();
 
                
                out.flush();
 
                out.close();
 
        }
 
}
 @H_502_12@

单元测试：

package@H_502_12@ cn.itcast.test;
 

@H_502_12@import@H_502_12@ java.io.File;
 
@H_502_12@import@H_502_12@ java.io.FileOutputStream;
 
@H_502_12@import@H_502_12@ java.io.InputStream;
 
@H_502_12@import@H_502_12@ java.util.ArrayList;
 
@H_502_12@import@H_502_12@ java.util.Iterator;
 
@H_502_12@import@H_502_12@ java.util.List;
 

@H_502_12@import@H_502_12@ cn.itcast.domain.Person;
 
@H_502_12@import@H_502_12@ cn.itcast.service.PersonService;
 
@H_502_12@import@H_502_12@ android.test.AndroidTestCase;
 
@H_502_12@import@H_502_12@ android.util.Log;
 

@H_502_12@public@H_502_12@ class@H_502_12@ PersonServiceTest extends@H_502_12@ AndroidTestCase{
 
        @H_502_12@private@H_502_12@ static@H_502_12@ final@H_502_12@ String TAG = "PersonServiceTest";
 
        
        @H_502_12@public@H_502_12@ void@H_502_12@ testPersons() throws@H_502_12@ Exception{
 
                InputStream xml @H_502_12@= this@H_502_12@.getClass().getClassLoader().getResourceAsStream("person.xml");
 
                List@H_502_12@<Person> persons = PersonService.getPerson(xml);
 
                @H_502_12@for@H_502_12@(Person person : persons){
 
                        Log.i(TAG,person.toString());
 
                }
 
        }
 
        
        @H_502_12@public@H_502_12@ void@H_502_12@ testSave() throws@H_502_12@ Exception{
 
                List@H_502_12@<Person> persons = new@H_502_12@ ArrayList<Person>();
 
                persons.add(@H_502_12@new@H_502_12@ Person(1,"zhangsan",80));
 
                persons.add(@H_502_12@new@H_502_12@ Person(2,"lisi",43));
 
                persons.add(@H_502_12@new@H_502_12@ Person(3,"wangwu",12));
 
                @H_502_12@//@H_502_12@<包> @H_502_12@//@H_502_12@/file@H_502_12@
 
                File xmlFile @H_502_12@= new@H_502_12@ File(getContext().getFilesDir(),"itcast.xml");
 
                FileOutputStream outStream @H_502_12@= new@H_502_12@ FileOutputStream(xmlFile);
 
                
                PersonService.save(persons,outStream);
 
        }
 
}
 @H_502_12@

实例教程四：采用Pull解析器解析和生成XML内容

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