如何解决ParseXml 在某些提要 xml 上失败
制作一个简单的RSS提要阅读器，用户可以从固定站点列表中进行选择。它适用于 20 个提要，但在其他 15 个提要中失败（都是 35 个有效的 xml 和无效的 xsd）。应用不会崩溃，logcat 没有错误，只有警告。
一些对我来说效果很好的提要是：
一些对我来说不起作用的提要：
DOM解析器
import android.annotation.SuppressLint;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
public class DOMParser {
private RSSFeed _feed = new RSSFeed();
public RSSFeed parseXml(String xml) {
try {
// Create required instances
DocumentBuilderFactory dbf;
dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
// Parse the xml
Document doc = db.parse(xml);
doc.getDocumentElement().normalize();
NodeList nl = doc.getElementsByTagName("item");
int length = nl.getLength();
for (int i = 0; i < length; i++) {
RSSItem _item = new RSSItem();
if (nl.item(i).getNodeType() == Node.ELEMENT_NODE) {
Element eElement = (Element) nl.item(i);
//Get Link
_item.setLink(eElement.getElementsByTagName("link").item(0).getTextContent());
//Get Date
//Taking pubDate and make it HH:mm dd/MM/yy
String TimeDate = eElement.getElementsByTagName("pubDate").item(0).getTextContent();
String ZYear = TimeDate.substring(12,16),ZMonth = TimeDate.substring(8,11),ZDay = TimeDate.substring(5,7);
String ZHour = TimeDate.substring(17,19),ZMinute = TimeDate.substring(20,22);
String ZTimezone = TimeDate.substring(26,30);
if (ZMonth.equals("Jar")) {
ZMonth = "01";
} else if (ZMonth.equals("Feb")) {
ZMonth = "02";
} else if (ZMonth.equals("Mar")) {
ZMonth = "03";
} else if (ZMonth.equals("Apr")) {
ZMonth = "04";
} else if (ZMonth.equals("May")) {
ZMonth = "05";
} else if (ZMonth.equals("Jun")) {
ZMonth = "06";
} else if (ZMonth.equals("Jul")) {
ZMonth = "07";
} else if (ZMonth.equals("Aug")) {
ZMonth = "08";
} else if (ZMonth.equals("Sep")) {
ZMonth = "09";
} else if (ZMonth.equals("Oct")) {
ZMonth = "10";
} else if (ZMonth.equals("Nov")) {
ZMonth = "11";
} else if (ZMonth.equals("Dec")) {
ZMonth = "12";
}
TimeDate = ZHour + ":" + ZMinute + " " + ZDay + "/" + ZMonth + "/" + ZYear;
//Convert date to milliseconds since 00:00 01/01/1970
@SuppressLint("SimpleDateFormat") SimpleDateFormat formatter = new SimpleDateFormat("HH:mm dd/MM/yyyy");
formatter.setLenient(false);
Date date_before = formatter.parse(TimeDate);
assert date_before != null;
long milliseconds = date_before.getTime();
//Add time to reach +0200 Athens/Greece
if (ZTimezone.equals("0000")) {
milliseconds = milliseconds + 7200000;
}
_item.setDateComparison((int) milliseconds);
// add item to the list
_feed.addItem(_item);
}
}
} catch (ParserConfigurationException | IOException | ParseException | SAXException e) {
e.printStackTrace();
}
// Return the final feed once all the Items are added to the RSSFeed
// Object(_feed).
return _feed;
}
}logcat 警告
2020-12-28 23:26:34.305 30015-30071/ozma13.riseapp W/System: ClassLoader referenced unknown path: system/framework/mediatek-cta.jar
2020-12-28 23:26:34.423 30015-30071/ozma13.riseapp W/System: ClassLoader referenced unknown path: system/framework/mediatek-cta.jar
2020-12-28 23:26:34.530 30015-30071/ozma13.riseapp W/System.err: org.xml.sax.SAXParseException: Unexpected end of document
2020-12-28 23:26:34.533 30015-30071/ozma13.riseapp W/System.err: at org.apache.harmony.xml.parsers.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:125)
2020-12-28 23:26:34.534 30015-30071/ozma13.riseapp W/System.err: at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:155)
2020-12-28 23:26:34.534 30015-30071/ozma13.riseapp W/System.err: at ozma13.riseapp.DOMParser.parseXml(DOMParser.java:30)
2020-12-28 23:26:34.534 30015-30071/ozma13.riseapp W/System.err: at ozma13.riseapp.MainActivity$AsyncLoadXMLFeed.doInBackground(MainActivity.java:532)
2020-12-28 23:26:34.534 30015-30071/ozma13.riseapp W/System.err: at ozma13.riseapp.MainActivity$AsyncLoadXMLFeed.doInBackground(MainActivity.java:441)
2020-12-28 23:26:34.535 30015-30071/ozma13.riseapp W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:333)
2020-12-28 23:26:34.535 30015-30071/ozma13.riseapp W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:266)
2020-12-28 23:26:34.535 30015-30071/ozma13.riseapp W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
2020-12-28 23:26:34.535 30015-30071/ozma13.riseapp W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
2020-12-28 23:26:34.536 30015-30071/ozma13.riseapp W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
2020-12-28 23:26:34.536 30015-30071/ozma13.riseapp W/System.err: at java.lang.Thread.run(Thread.java:780)
2020-12-28 23:26:35.120 30015-30043/ozma13.riseapp W/ThreadedRenderer: ThreadedRenderer::detachAnimators pid = 30015 threadid = 30043
2020-12-28 23:26:35.183 30015-30043/ozma13.riseapp W/ThreadedRenderer: ThreadedRenderer::detachAnimators pid = 30015 threadid = 30043
2020-12-28 23:26:37.734 30015-30043/ozma13.riseapp W/ThreadedRenderer: ThreadedRenderer::detachAnimators pid = 30015 threadid = 30043解决方法
答案是在非检索 xml 中的“https”和“http”之间切换。我不知道为什么，但这对我来说就是解决办法！
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