使用XmlPullParser

Question

解析复杂的XML我需要解析使用XmlPuppParser

<lfm status="ok"> 
    <events xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#" artist="Armin van Buuren" festivalsonly="0" page="1" perPage="50" totalPages="1" total="17"> 
     <event xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#"> 
      <id>3353053</id> 
      <title>ULTRA Buenos Aires 2013 - Dia 2</title> 
      <artists> 
       <artist>Armin van Buuren</artist> 
       ... 
       <artist>Adrian de Bernardi</artist> 
       <artist>Manu Desrets</artist> 
       <headliner>Armin van Buuren</headliner> 
      </artists> 
      <venue> 
       <id>8778836</id> 
       <name>Costanera Sur</name> 
       <location> 
        <city>Ciudad de Buenos Aires</city> 
        <country>Argentina</country> 
        <street>Av. Espana 2230</street> 
        <postalcode/> 
        <geo:point> 
         <geo:lat>-34.61135</geo:lat> 
         <geo:long>-58.35838</geo:long> 
        </geo:point> 
       </location> 
       <url>http://www.last.fm/venue/8778836+Costanera+Sur</url> 
       <website/> 
       <phonenumber/> 
       <image size="small">http://userserve-ak.last.fm/serve/34/54798997.jpg</image> 
       .... 
       <image size="extralarge">http://userserve-ak.last.fm/serve/252/54798997.jpg</image> 
      </venue> 
      <startDate>Sat, 23 Feb 2013 17:58:01</startDate> 
      <description/> 
      <image size="small">http://userserve-ak.last.fm/serve/34/83063099.jpg</image> 
      .... 
      <image size="extralarge">http://userserve-ak.last.fm/serve/252/83063099.jpg</image> 
      <attendance>45</attendance> 
      <reviews>0</reviews> 
      <tag>lastfm:event=3353053</tag> 
      <url>http://www.last.fm/festival/3353053+ULTRA+Buenos+Aires+2013+-+D%C3%ADa+2</url> 
      <website>http://ultrabuenosaires.com/</website> 
      <tickets></tickets> 
      <cancelled>0</cancelled> 
      <tags> 
       <tag>electronic</tag> 
      </tags> 
     </event> 
     <event xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#"> 
      .... 
     </event> 
    </events> 
</lfm> 

我需要分析该信息，这个XML：标题，艺术家，城市，国家，地理，日期和说明

while (parser.next() != XmlPullParser.END_TAG) { 
      if (parser.getEventType() != XmlPullParser.START_TAG) { 
       continue; 
      } 
      String tag = parser.getName(); 
      MyLog.d(TAG, "tag == " + tag); 
      if (tag.equals("title")) { 
       title = readTitle(parser); 
       MyLog.d(TAG, "tag == " + tag + ": " + title); 
      } else if (tag.equals("artists")) { 
       MyLog.d(TAG, "tag == " + tag); 
      } else if (tag.equals("artist")) { 
       if (artists == null) { 
        artists = readArtist(parser); 
       } else { 
        artists += ", " + readArtist(parser); 
       } 
       MyLog.d(TAG, "tag == " + tag + ": " + artists); 
      } else if (tag.equals("headliner")) { 
       artists += ", " + readHeadliner(parser); 
       MyLog.d(TAG, "tag == " + tag + ": " + artists); 
       parser.nextTag(); 
      } else if (tag.equals("venue")) { 
       MyLog.d(TAG, "tag == " + tag); 
      } else if (tag.equals("location")) { 
       MyLog.d(TAG, "tag == " + tag); 
      } else if (tag.equals("city")) { 
       city = readCity(parser); 
       MyLog.d(TAG, "tag == " + tag + ": " + city); 
      } else if (tag.equals("country")) { 
       country = readCountry(parser); 
       MyLog.d(TAG, "tag == " + tag + ": " + country); 
      } else if (tag.equals("geo:point")) { 
       MyLog.d(TAG, "tag == " + tag); 
      } else if (tag.equals("geo:lat")) { 
       geoLat = readGeoLat(parser); 
       MyLog.d(TAG, "tag == " + tag + ": " + geoLat); 
      } else if (tag.equals("geo:long")) { 
       geoLong = readGeoLong(parser); 
       MyLog.d(TAG, "tag == " + tag + ": " + geoLong); 
      } else if (tag.equals("startDate")) { 
       date = readDate(parser); 
       MyLog.d(TAG, "tag == " + tag + ": " + date); 
      } else if (tag.equals("description")) { 
       description = readDescription(parser); 
       MyLog.d(TAG, "tag == " + tag + ": " + description); 
      } else { 
       skip(parser); 
      } 

     } 

private String readTitle(XmlPullParser parser) throws IOException, 
      XmlPullParserException { 
     MyLog.d(TAG, "readTitle"); 
     parser.require(XmlPullParser.START_TAG, ns, "title"); 
     String name = readText(parser); 
     parser.require(XmlPullParser.END_TAG, ns, "title"); 
     return name; 
    } 

private String readText(XmlPullParser parser) throws IOException, 
      XmlPullParserException { 
     MyLog.d(TAG, "readText"); 
     String result = ""; 
     if (parser.next() == XmlPullParser.TEXT) { 
      result = parser.getText(); 
      parser.nextTag(); 
     } 
     return result; 
    } 

private void skip(XmlPullParser parser) throws XmlPullParserException, 
      IOException { 

     MyLog.d(TAG, "skip"); 

     if (parser.getEventType() != XmlPullParser.START_TAG) { 
      throw new IllegalStateException(); 
     } 
     int depth = 1; 
     while (depth != 0) { 
      switch (parser.next()) { 
      case XmlPullParser.END_TAG: 
       depth--; 
       break; 
      case XmlPullParser.START_TAG: 
       depth++; 
       break; 
      } 
     } 
    } 

我解析除日期和说明以外的所有信息。我认为我的错误是，解析后的位置没有找到下一个标记。你可以改变我的代码或给我教程如何使用XmlPullParser解析复杂的XML？

Answer 1

我用这个代码，它的工作以及..例如使用此代码..

在解析START_TAG，当您分析标签，拿一个计数器变量并赋予其1，然后每当你获取标记，在那现在，在解析标签时，只需检查标签是否第一次出现，如果它解析了所需的值。

<spaces> 
<space> 
<name></name> 
<desc></desc> 
<songs> 
    <song> 
    <name></name> 
    <thumb></thumb> 
    </song> 
    <song> 
    <name></name> 
    <thumb></thumb> 
    </song> 
</songs> 
</space> 
</spaces> 



case XmlPullParser.START_TAG: 
       name = parser.getName(); 
       if (name.equalsIgnoreCase("space")) { 
        cnt=1; 
        currentSpace = new Space(); 
        System.out.println("space"); 

       } else if (currentSpace != null) { 

        if (name.equalsIgnoreCase("name")) 
        { 
         currentSpace.setName(parser.nextText()); 
         if(cnt==1) 
         { 
          // you have <name> from <space> 
         } 
         System.out.println(":::"+currentSpace.getName()); 
         cnt++; 
        } else if (name.equalsIgnoreCase("id")) { 
         if (currentSpace.getId() == null) { 
          currentSpace.setId(parser.nextText()); 
         } 

        } 

       } 

       break;