Android学习笔记之XML介绍

发布时间：2021-11-24 17:49:51 所属栏目：教程来源：互联网

导读：这个网上有很多上源码先 public class ChatLogContentHandler extends DefaultHandler{ ChatInfo info=null; ArrayListChatInfo infos=null; String tagName=null; public ChatLogContentHandler(ArrayListChatInfo infos) { super(); this.infos = infos;

这个网上有很多……

上源码先

public class ChatLogContentHandler extends DefaultHandler{
    ChatInfo info=null;
    ArrayList<ChatInfo> infos=null;
    String tagName=null;

    public ChatLogContentHandler(ArrayList<ChatInfo> infos) {
        super();
        this.infos = infos;
    }

    public void startDocument() throws SAXException {
        System.out.println("`````````````````````解析XML```````````````````````````````");
    }

    public void endDocument() throws SAXException {
        System.out.println("````````解析完了！！````````");
    }

    public void startElement(String namespaceURI, String localName,
            String qName, Attributes attr) throws SAXException {
        //System.out.println("`````````````````````开始啦！！！``````````````````````````"+localName+"~~~~");
        tagName = localName;
        if(tagName.equals("chatinfo")){
            info=new ChatInfo();
            System.out.println("``````````````````````````````新建一个chatinfo对象``````````````````````````");
        }
    }

    public void endElement(String namespaceURI, String localName, String qName)
            throws SAXException {
        if(qName.equals("chatinfo")){
            infos.add(info);
            System.out.println("``````````````````````````````put in``````````````````````````");
        }
        tagName = "";
    }
    public void characters(char[] ch, int start, int length)
            throws SAXException {
        String temp=null;
        if (tagName.equals("name")){
            temp = new String(ch, start, length);
            info.setChatName(temp);
            System.out.println("````````set name:"+temp+"````````");
        }
        else if (tagName.equals("time")){
            temp = new String(ch, start, length);
            info.setChatTime(temp);
            System.out.println("````````set time:"+temp+"````````");
        }
        else if (tagName.equals("info")){
            temp = new String(ch, start, length);
            info.setChatString(temp);
            System.out.println("````````set str:"+temp+"````````");
        }
    }
}
这种接卸方式很简单，不多解释
重要的是不用在一开始全部读入，重要的是隔行解析——这也就是为什么在前篇一定要按要求存入xml的原因。

如果xml文档不标准，写成一行<chatlog><chatinfo><time>12:00</time></chatinfo></chatlog>

解析是会报错的~

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