xml多层嵌套解析方法SAX方式（包括网络请求）

启用异步类获取数据

package com.bwie.myasynctask;

import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.xml.sax.SAXException;

import com.bwie.http_img_xml_caipu.ItemActivity;
import com.bwie.myadapter.HomeAdapter;
import com.bwie.mydefaulthander.HomeDefaultHander;
import com.bwie.vo.DataVO;
import com.bwie.vo.StepsVO;

import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;

public class MyAsyncTask extends AsyncTask<String, Integer, List<DataVO>> {
   private Context context;
   private ListView lv;
   private String str_ed;
   private List<DataVO> datalist;


   public MyAsyncTask(Context context, ListView lv, String str_ed) {
       super();
       this.context = context;
       this.lv = lv;
       this.str_ed = str_ed;
   }

   @Override
   protected List<DataVO> doInBackground(String... arg0) {
       // TODO Auto-generated method stub
       HttpClient client=new DefaultHttpClient();
       HttpPost post=new HttpPost(arg0[0]);
       List<NameValuePair> list=new ArrayList<NameValuePair>();
       list.add(new BasicNameValuePair("key", "3a3d0fa15180459cbf022d5d77e50de5"));
       list.add(new BasicNameValuePair("menu", str_ed));
       list.add(new BasicNameValuePair("rn", "10"));
       list.add(new BasicNameValuePair("pn", "3"));
       list.add(new BasicNameValuePair("dtype", "xml"));
       try {
           UrlEncodedFormEntity entity=new UrlEncodedFormEntity(list,HTTP.UTF_8);
           post.setHeader("Content_Type", "application/x-www-form-urlencoded;charset=utf-8");
           post.setEntity(entity);
           HttpResponse response = client.execute(post);
           if (response.getStatusLine().getStatusCode()==200) {
               InputStream is=response.getEntity().getContent();
               SAXParserFactory factory=SAXParserFactory.newInstance();
               SAXParser parser=factory.newSAXParser();
               HomeDefaultHander dh=new HomeDefaultHander();
               parser.parse(is, dh);
               datalist = dh.getdatalist();

           }
       } catch (UnsupportedEncodingException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (ClientProtocolException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (IOException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (ParserConfigurationException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (SAXException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
       return datalist;
   }

   @Override
   protected void onPostExecute(final List<DataVO> result) {
       // TODO Auto-generated method stub
       super.onPostExecute(result);
       lv.setAdapter(new HomeAdapter(context, result));
       lv.setOnItemClickListener(new OnItemClickListener() {

           public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                   long arg3) {
               // TODO Auto-generated method stub
               Intent intent=new Intent(context, ItemActivity.class);
               intent.putExtra("list",(Serializable)result.get(arg2).steps);
               context.startActivity(intent);
           }
       });
   }

   @Override
   protected void onPreExecute() {
       // TODO Auto-generated method stub
       super.onPreExecute();
   }

   @Override
   protected void onProgressUpdate(Integer... values) {
       // TODO Auto-generated method stub
       super.onProgressUpdate(values);
   }

}

自定义类

package com.bwie.mydefaulthander;

import java.util.ArrayList;
import java.util.List;

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

import android.util.Log;

import com.bwie.vo.DataVO;
import com.bwie.vo.StepsVO;

public class HomeDefaultHander extends DefaultHandler {
   private List<DataVO> data;
   private int mun=0;
   private String flag;
   private DataVO dataVO;
   private StepsVO stepsVO;
   //开始解析文档
   @Override
   public void startDocument() throws SAXException {
       // TODO Auto-generated method stub
       super.startDocument();
       data = new ArrayList<DataVO>();
       Log.e("TAG", "开始解析文档");
   }
   //开始解析标签
   @Override
   public void startElement(String uri, String localName, String qName,
           Attributes attributes) throws SAXException {
       // TODO Auto-generated method stub
       super.startElement(uri, localName, qName, attributes);
       Log.e("TAG", "解析标签开始");
       flag = localName;
       if (localName.equals("item")&&mun==0) {
           dataVO = new DataVO();
           mun=1;
       }else if (localName.equals("item")&&mun==2) {
           stepsVO = new StepsVO();
           mun=2;
       }else if(localName.equals("steps")){
           dataVO.steps=new ArrayList<StepsVO>();
           mun=2;
       }
   }
   //解析文本
   @Override
   public void characters(char[] ch, int start, int length)
           throws SAXException {
       // TODO Auto-generated method stub
       super.characters(ch, start, length);
       String text=new String(ch, start, length);
       Log.e("TAG", "解析文本"+text);
       if (flag.equals("title")) {
           dataVO.setTitle(text);
       } else if (flag.equals("tags")){
           dataVO.setTags(text);
       }else if (flag.equals("imtro")){
           dataVO.setImtro(text);
       }else if (flag.equals("ingredients")){
           dataVO.setIngredients(text);
       }else if (flag.equals("burden")){
           dataVO.setBurden(text);
       }else if (flag.equals("item")&&mun==1){
           dataVO.setAlbums(text);
       }else if (flag.equals("img")){
           stepsVO.setImg(text);
       }else if (flag.equals("step")){
           stepsVO.setStep(text);
       }
   }
   //解析标签结束
   @Override
   public void endElement(String uri, String localName, String qName)
           throws SAXException {
       // TODO Auto-generated method stub
       super.endElement(uri, localName, qName);
       if (localName.equals("item")&&mun==2) {
           dataVO.steps.add(stepsVO);
           mun=2;
       }else if(localName.equals("item")&&mun==0){
           data.add(dataVO);
           mun=0;
       }else if(localName.equals("steps")){
           mun=0;
       }
       flag="";
   }
   //解析文档结束
   @Override
   public void endDocument() throws SAXException {
       // TODO Auto-generated method stub
       super.endDocument();
   }
   //得到外层集合
   public List<DataVO> getdatalist(){
       return data;

   }

}

来源：https://www.cnblogs.com/pingguo/p/5005612.html

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sax解析xml

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