Android解析XML(PULL)展示到ListView

程序员文章站 2023-12-17 20:18:22

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" cont...

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解析XML(PULL)展示到ListView

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>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

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