Android解析XML展示到ListView Android解析XML(PULL)展示到ListView

时间:2021-03-24 qq_37278353 人气:0

想了解Android解析XML(PULL)展示到ListView的相关内容吗，qq_37278353在本文为您仔细讲解Android解析XML展示到ListView的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：Android,XML,ListView，下面大家一起来学习吧。

Android解析XML展示到ListView运行后的效果图如下：

服务端的请求页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
 <a href="studentActiongetXML.action" rel="external nofollow" >获取XML数据</a><br/>


</body>
</html>

服务端返回结果的页面

<?xml version="1.0" encoding="UTF-8" ?>
<%@ page language="java" contentType="text/xml; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<students>
<c:forEach items="${students}" var="s">
 <student name="${s.name}">
  <sex>${s.sex}</sex>
 </student>
 </c:forEach>
</students>

服务端的Java代码

package com.zking.action;

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

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;
import com.zking.entity.Student;

public class StudentAction extends ActionSupport{

public String getXML() throws Exception {

 //查询数据库，获取数据
 List<Student> students=new ArrayList<>();
 for (int i = 1; i <=20; i++) {
  Student student=new Student("小霜"+i, "女");
  students.add(student);
 }

 //将对象集合保存到请求域中
 ServletActionContext.getRequest().setAttribute("students", students);
 return "dataResult";
 } 
}

服务端的配置文件（struts.xml）

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 "http://struts.apache.org/dtds/struts-2.3.dtd">
 <struts>
 <package name="myPackage" extends="struts-default">

  <action name="studentAction*" class="com.zking.action.StudentAction" method="{1}">
   <result name="dataResult">/dataResult.jsp</result>

  </action>
 </package>
 </struts>

服务端的运行结果

Android （布局文件 activity_main.xml）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"
 android:layout_width="match_parent" android:layout_height="match_parent"
 android:paddingBottom="@dimen/activity_vertical_margin"
 android:paddingLeft="@dimen/activity_horizontal_margin"
 android:paddingRight="@dimen/activity_horizontal_margin"
 android:paddingTop="@dimen/activity_vertical_margin"
 android:orientation="vertical"
 tools:context="com.example.g150825_android29_parsexml.MainActivity">

 <Button
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="获取XML"
 android:onClick="getXML"
 />
 <ListView
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:id="@+id/lv_main_list"
 ></ListView>
</LinearLayout>

Android（Java代码 MainActivity）

package com.example.g150825_android29_parsexml;

import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.util.Xml;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

import org.xmlpull.v1.XmlPullParser;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
 List<Student> studentList=new ArrayList<>();
 private ListView lv_main_list;
 private MyAdater myAdater;
 private ProgressDialog progressDialog;


 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 //实例化进度条对话框
 progressDialog = new ProgressDialog(this);
 progressDialog.setMessage("正在拼命加载中.....");

 lv_main_list = (ListView) findViewById(R.id.lv_main_list);

 //实例化适配器
 //设置适配器
 myAdater = new MyAdater();
 lv_main_list.setAdapter(myAdater);
 }

 class MyAdater extends BaseAdapter{

 @Override
 public int getCount() {
  return studentList.size();
 }

 @Override
 public Object getItem(int i) {
  return studentList.get(i);
 }

 @Override
 public long getItemId(int i) {
  return i;
 }

 @Override
 public View getView(int i, View view, ViewGroup viewGroup) {
  LinearLayout linearLayout=new LinearLayout(MainActivity.this);
  linearLayout.setOrientation(LinearLayout.HORIZONTAL);

  TextView textViewName=new TextView(MainActivity.this);
  textViewName.setText(studentList.get(i).getName());

  TextView textViewSex=new TextView(MainActivity.this);
  textViewSex.setText(studentList.get(i).getSex());

  linearLayout.addView(textViewName);
  linearLayout.addView(textViewSex);

  return linearLayout;
 }
 }

 public void getXML(View view){
 new MyTask().execute();
 }
 class MyTask extends AsyncTask{
 private Student student;

 @Override
 protected void onPreExecute() {
  super.onPreExecute();
  progressDialog.show();
 }

 @Override
 protected Object doInBackground(Object[] objects) {
  //01.确定网络数据
  String path="http://192.168.43.152:8080/G150825_S2SH/studentActiongetXML.action";

  try {
  //02.实例化URL
  URL url=new URL(path);
  //03.获取连接对象
  HttpURLConnection httpURLConnection= (HttpURLConnection) url.openConnection();
  //04.设置请求方式
  httpURLConnection.setRequestMethod("GET");
  //05.设置请求连接超时的时间(优化)
  httpURLConnection.setConnectTimeout(5000);
  //06.获取响应码（结果码）
  int code=httpURLConnection.getResponseCode();
  if (code==200){
   //07.获取服务器返回过来的数据
   InputStream is=httpURLConnection.getInputStream();
   //测试（打印）
   //缓冲字符流
//   BufferedReader br=new BufferedReader(new InputStreamReader(is));
//   String str=null;
//   while ((str=br.readLine())!=null){
//   Log.i("test",str);
//   }
   //解析XML（PULL）
   XmlPullParser xmlPullParser=Xml.newPullParser();
   xmlPullParser.setInput(is,"UTF-8");
   int type=xmlPullParser.getEventType();
   while (type!=XmlPullParser.END_DOCUMENT){
   switch (type){

    case XmlPullParser.START_TAG:
    //获取开始标签
    String startTagName=xmlPullParser.getName();
    if ("student".equals(startTagName)){
     student = new Student();
     //获取name属性值
     String name=xmlPullParser.getAttributeValue(0);
     student.setName(name);
    }else if("sex".equals(startTagName)){
     //获取sex的文本值
     String sex=xmlPullParser.nextText();
     student.setSex(sex);

    }

    break;
    case XmlPullParser.END_TAG:
    //获取到结束标签的名字
    String endTagName=xmlPullParser.getName();
    if("student".equals(endTagName)){
     studentList.add(student);

    }

    break;
   }
   type=xmlPullParser.next();
   }
  }
  } catch (Exception e) {
  e.printStackTrace();
  }

  return null;
 }

 @Override
 protected void onPostExecute(Object o) {
  super.onPostExecute(o);
  //通知适配器发生改变
  myAdater.notifyDataSetChanged();
  progressDialog.cancel();

 }
 }
}

Android （实体类 Student）

package com.example.g150825_android29_parsexml;

public class Student {
 private String name;
 private String sex;
 public Student() {
 super();
 // TODO Auto-generated constructor stub
 }
 public Student(String name, String sex) {
 super();
 this.name = name;
 this.sex = sex;
 }
 public String getName() {
 return name;
 }
 public void setName(String name) {
 this.name = name;
 }
 public String getSex() {
 return sex;
 }
 public void setSex(String sex) {
 this.sex = sex;
 }
}

在清单文件中添加权限即可（AndroidManifest.xml）

 <!--添加网络权限-->
 <uses-permission android:name="android.permission.INTERNET"></uses-permission>

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