Android XML JSON解析

    private void xmlPull(String xmlStr){
        XmlPullParserFactory factory= null;
        try {
            factory = XmlPullParserFactory.newInstance();
            XmlPullParser xmlPullParser = factory.newPullParser();
            xmlPullParser.setInput(new StringReader(xmlStr));
            int eventType = xmlPullParser.getEventType();
            String id="";
            String name="";
            String version="";
            while (eventType!=XmlPullParser.END_DOCUMENT){
                String nodeName=xmlPullParser.getName();
                switch (eventType){
                    case START_TAG:{
                        if("id".equals(nodeName)){
                            id=xmlPullParser.nextText();
                        }else if("name".equals(nodeName)){
                            name=xmlPullParser.nextText();
                        }else if("version".equals(nodeName)){
                            version=xmlPullParser.nextText();
                        }
                        break;
                    }
                    case END_TAG:{
                        if("app".equals(nodeName)){
                            Log.d(TAG, "xmlPull: id is:"+ id);
                            Log.d(TAG, "xmlPull: name is:"+ name);
                            Log.d(TAG, "xmlPull: version is:" + version);
                        }
                        break;
                    }                        
                    default:
                        break;
                }
                try {
                    eventType = xmlPullParser.next();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

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    private void xmlSax(String xmlStr){
        try {
            SAXParserFactory saxParserFactory=SAXParserFactory.newInstance();
            XMLReader xmlReader=saxParserFactory.newSAXParser().getXMLReader();
            SaxHandler saxHandler=new SaxHandler();
            xmlReader.setContentHandler(saxHandler);
            xmlReader.parse(new InputSource(new StringReader(xmlStr)));
            Log.d(TAG, "xmlSax: 调用了程序了");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //新建类，这个是xmlSax解析的
package com.example.httpactivity;

import android.util.Log;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;



public class SaxHandler extends DefaultHandler {
    private String nodeName;
    private StringBuilder id;
    private StringBuilder name;
    private StringBuilder version;
    @Override
    public void startDocument() throws SAXException {
        super.startDocument();
        id = new StringBuilder();
        name=new StringBuilder();
        version=new StringBuilder();
    }

    @Override
    public void endDocument() throws SAXException {
        super.endDocument();
    }

    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        super.startElement(uri, localName, qName, attributes);
        nodeName=localName;
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        super.endElement(uri, localName, qName);
        if("app".equals(localName)){
            Log.d("SaxHandler", "id is:"+id);
            Log.d("SaxHandler", "name is:"+name);
            Log.d("SaxHandler", "version is:"+version);
            //最后要将StringBuild清空
            id.setLength(0);
            name.setLength(0);
            version.setLength(0);
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        super.characters(ch, start, length);
        if("id".equals(nodeName)){
            id.append(ch,start,length);
        }else if("name".equals(nodeName)){
            name.append(ch,start,length);
        }else if("version".equals(nodeName)){
            version.append(ch,start,length);
        }
    }
}


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    private void jsonParse(String jsStr){
        try {
            JSONArray jsonArray=new JSONArray(jsStr);
            for(int i=0;i<jsonArray.length();i++){
                JSONObject jsonObject=jsonArray.getJSONObject(i);
                String id=jsonObject.getString("id");
                String version=jsonObject.getString("version");
                //String name=jsonObject.getString("name");
                Log.d(TAG, "jsonParse id: "+id);
                Log.d(TAG, "jsonParse version: "+version);
                //Log.d(TAG, "jsonParse name: "+name);;
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }