如何使用XmlPullParser解析复杂的XML [英] How to parse complex XML using XmlPullParser
本文介绍了如何使用XmlPullParser解析复杂的XML的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
大家好我有一个XML解析问题。我试图用XmlPullParser解析
Hi guys I have problem with xml parsing. I'm trying to parse using XmlPullParser
XML如下:
<lfm status="ok">
<topartists user="dailz" type="overall" page="1" perPage="50" totalPages="30" total="1493">
<artist rank="1">
<name>Oasis</name>
<url>http://www.last.fm/music/Oasis</url>
<image size="small">http://userserve-ak.last.fm/serve/34/44937531.jpg</image>
<image size="large">http://userserve-ak.last.fm/serve/126/44937531.jpg</image>
</artist>
<artist rank="2">
...
</artist>
</topartists>
</lfm>
这是我想要做的:
public class TopArtistsParser {
private static final String ns = null;
private static final String TAG = "TopArtistsParser";
public class Artist {
public final String rank;
public final String name;
public final String url;
public final String image;
private Artist(String rank, String name, String url, String image) {
this.rank = rank;
this.name = name;
this.url = url;
this.image = image;
}
}
public List<Artist> parse(InputStream in) throws XmlPullParserException,
IOException {
MyLog.d(TAG, "List<Artist> parse");
try {
XmlPullParser parser = Xml.newPullParser();
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
parser.setInput(in, null);
parser.nextTag();
return readFeed(parser);
} finally {
in.close();
}
}
private List<Artist> readFeed(XmlPullParser parser)
throws XmlPullParserException, IOException {
MyLog.d(TAG, "List<Artist> readFeed");
List<Artist> artistsList = new ArrayList<Artist>();
parser.require(XmlPullParser.START_TAG, ns, "lfm");
while (parser.next() != XmlPullParser.END_TAG) {
if (parser.getEventType() != XmlPullParser.START_TAG) {
continue;
}
String tag = parser.getName();
if (tag.equals("artist")) {
MyLog.d(TAG, "tag == 'artist'");
artistsList.add(readArtist(parser));
} else {
skip(parser);
}
}
return artistsList;
}
private Artist readArtist(XmlPullParser parser)
throws XmlPullParserException, IOException {
MyLog.d(TAG, "Artist readArtist");
parser.require(XmlPullParser.START_TAG, ns, "artist");
String rank = null;
String name = null;
String url = null;
String image = null;
while (parser.next() != XmlPullParser.END_TAG) {
if (parser.getEventType() != XmlPullParser.START_TAG) {
continue;
}
String tag = parser.getName();
if (tag.equals("name")) {
name = readName(parser);
MyLog.d(TAG, "tag == 'name': " + name);
} else if (tag.equals("url")) {
url = readUrl(parser);
MyLog.d(TAG, "tag == 'url': " + url);
} else if (tag.equals("image")) {
image = readImage(parser);
MyLog.d(TAG, "tag == 'image': " + image);
} else {
skip(parser);
}
}
return new Artist(rank, name, url, image);
}
private String readName(XmlPullParser parser) throws IOException,
XmlPullParserException {
MyLog.d(TAG, "readName");
parser.require(XmlPullParser.START_TAG, ns, "name");
String name = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "name");
return name;
}
private String readUrl(XmlPullParser parser) throws IOException,
XmlPullParserException {
MyLog.d(TAG, "readUrl");
parser.require(XmlPullParser.START_TAG, ns, "url");
String url = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "url");
return url;
}
private String readImage(XmlPullParser parser) throws IOException,
XmlPullParserException {
MyLog.d(TAG, "readImage");
parser.require(XmlPullParser.START_TAG, ns, "image");
String image = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "image");
return image;
}
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;
}
}
}
}
我看了解析XML数据但事与愿违帮助我。
你能帮我解析:等级,名称,网址,图像(尺寸大)?
Can you help me to parse: rank, name, url, image (size large)?
推荐答案
我的广告这code和所有的工作
I ad this code and all work
<!-- language: java -->
while (parser.next() != XmlPullParser.END_TAG) {
if (parser.getEventType() != XmlPullParser.START_TAG) {
continue;
}
String tag = parser.getName();
if (tag.equals("topartists")) {
MyLog.d(TAG, "tag == " + tag);
tag = parser.getName();
} else if (tag.equals("artist")) {
MyLog.d(TAG, "tag == " + tag);
artistsList.add(readArtist(parser));
} else {
skip(parser);
}
}
这篇关于如何使用XmlPullParser解析复杂的XML的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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