android利用http请求xml

Android视频资讯获取与解析

最新推荐文章于 2022-05-05 21:41:29 发布

转载最新推荐文章于 2022-05-05 21:41:29 发布 · 970 阅读

文章标签：

#android #integer #exception #video #string #class

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本文介绍了一个Android应用中获取最新视频资讯的方法，通过HTTP请求从服务器获取XML格式的数据，并详细展示了如何解析这些数据到实体类中。

一、权限

<uses-permission android:name="android.permission.INTERNET"/>

二、实体domain

package cn.itcast.domain;

public class Video {
private Integer id;
private String title;
private Integer time;

public Video(){}

public Video(Integer id, String title, Integer time) {
  this.id = id;
  this.title = title;
  this.time = time;
}
public Integer getId() {
  return id;
}
public void setId(Integer id) {
  this.id = id;
}
public String getTitle() {
  return title;
}
public void setTitle(String title) {
  this.title = title;
}
public Integer getTime() {
  return time;
}
public void setTime(Integer time) {
  this.time = time;
}

}

三、编码

public class VideoService {
/**
* 获取最新的视频资讯
* @return
* @throws Exception
*/
public static List<Video> getLastVideos() throws Exception{
  String path = "http://192.168.1.100:8080/videoweb/video/list.do";
  URL url = new URL(path);
  HttpURLConnection conn = (HttpURLConnection)url.openConnection();
  conn.setReadTimeout(5*1000);
  conn.setRequestMethod("GET");
  InputStream inStream = conn.getInputStream();
  return parseXML(inStream);
}

/**
* 解析服务器返回的协议，得到视频资讯
* @param inStream
* @return
* @throws Exception
*/
private static List<Video> parseXML(InputStream inStream) throws Exception{
  List<Video> videos = null;
  Video video = null;
  XmlPullParser parser = Xml.newPullParser();
  parser.setInput(inStream, "UTF-8");
  int eventType = parser.getEventType();//产生第一个事件
  while(eventType!=XmlPullParser.END_DOCUMENT){//只要不是文档结束事件
   switch (eventType) {
   case XmlPullParser.START_DOCUMENT:
    videos = new ArrayList<Video>();
    break;

   case XmlPullParser.START_TAG:
    String name = parser.getName();//获取解析器当前指向的元素的名称
    if("video".equals(name)){
     video = new Video();
     video.setId(new Integer(parser.getAttributeValue(0)));
    }
    if(video!=null){
     if("title".equals(name)){
      video.setTitle(parser.nextText());//获取解析器当前指向元素的下一个文本节点的值
     }
     if("timelength".equals(name)){
      video.setTime(new Integer(parser.nextText()));
     }
    }
    break;

   case XmlPullParser.END_TAG:
    if("video".equals(parser.getName())){
     videos.add(video);
     video = null;
    }
    break;
   }
   eventType = parser.next();
  }
  return videos;
}
}