XmlPullPaser Android 默认xml解析器

自己学习使用，轻喷

***解析xml文件：

通过类加载器获得文件person.xml的输入流：
InputStream is = this.getClass().getClassLoader().getResourceAsStream("person.xml");
PaserService.getPersons(is);

 

===============PaserService================

public class PaserService {
    
    public static ArrayList<Person> getPersons(InputStream inputStream) throws Exception{
        
        ArrayList<Person> persons = null;
        Person person = null;
        XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
        factory.setNamespaceAware(true);
        XmlPullParser paser = factory.newPullParser();
        
        paser.setInput(inputStream, "UTF-8");
        int eventType = paser.getEventType();
        
        while (eventType != XmlPullParser.END_DOCUMENT) {
            switch (eventType) {
            case XmlPullParser.START_DOCUMENT:
                persons = new ArrayList<Person>();
                break;
            case XmlPullParser.START_TAG:
                if ("person".equals(paser.getName())) {
                    person = new Person();
                    person.setPersonid(paser.getAttributeValue(0));   //获得节点属性的第一个值，第二个值就为数组的1
                } else if ("name".equals(paser.getName())){
                    person.setPersonname(paser.nextText());    //获得节点里面的数据
                } else if ("phone".equals(paser.getName())){
                    person.setPersonnum(paser.nextText());
                }
                break;
            case XmlPullParser.END_TAG:
                if ("person".equals(paser.getName())) {
                    persons.add(person);
                    person = null;
                }
                break;
            default:
                break;
            }
            eventType = paser.next();    //将节点的循环继续往下
        }        
        return persons;
    }
}

 

***把值按xml格式写入某个xml中：
记得在Androidmanifest.xml中加入写入sdcard的权限
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

 

File file = new File(Environment.getExternalStorageDirectory(), "persons.xml"); //存储到sd卡中
FileOutputStream fos = new FileOutputStream(file);
PaserService.writeXml(fos, persons);

====writeXml====

public static void writeXml(OutputStream os, ArrayList<Person> persons) throws Exception{
        XmlSerializer serializer = Xml.newSerializer();
        serializer.setOutput(os, "UTF-8");
        serializer.startDocument("UTF-8", true);
        serializer.startTag(null, "persons");
        for (Person person : persons) {
            serializer.startTag(null, "person");
            serializer.attribute(null, "id", person.getPersonid());
            
            serializer.startTag(null, "name");
            serializer.text(person.getPersonname());
            serializer.endTag(null, "name");
            
            serializer.startTag(null, "phone");
            serializer.text(person.getPersonnum());
            serializer.endTag(null, "phone");
            
            serializer.endTag(null, "person");
        }
        serializer.endTag(null, "persons");
        serializer.endDocument();
        os.flush();
        os.close();
    }