我的Eclipse android应用程序的assets文件夹中有一个xml文件，我想阅读它。
以下是文件中的文字：
<question>
<text>Most?</text>
<answer correct="false">10</answer>
<answer correct="true">11</answer>
<answer correct="false">8</answer>
<answer correct="false">9</answer>
</question>
<question>
<text>Which?</text>
<answer correct="false">Titanic</answer>
<answer correct="false">American</answer>
<answer correct="true">:King</answer>
<answer correct="false">Yes</answer>
</question>
<question>
<text>First?</text>
<answer correct="false">John</answer>
<answer correct="true">James</answer>
<answer correct="false">Peter</answer>
<answer correct="false">Jean</answer>
</question>
这是我的代码：
while (eventType != XmlPullParser.END_DOCUMENT){
String name = null;
switch (eventType){
case XmlPullParser.START_DOCUMENT:
myItems = new ArrayList();
break;
case XmlPullParser.START_TAG:
case XmlPullParser.TEXT:
name = parser.getName();
if (name != null && answers == null && myItem == null) {
answers = new ArrayList();
myItem = new MyItem();
}
if (name.equals("text")){
myItem.setQuestion(parser.nextText());
} else if (name.equals("answer")){
answers.add(new Answer(parser.nextText(), false));
myItem.setAnswers(answers);
}
break;
case XmlPullParser.END_TAG:
name = parser.getName();
if (name.equalsIgnoreCase("question") && quizItem != null){
quizItems.add(quizItem);
}
}
eventType = parser.next();
}
现在这不起作用。首先输入START_DOCUMENT的case语句。在第二个循环中，输入TEXT大小写，parser.getName（）的值为“text”。 “问题”正在被忽略。为什么会这样？
答案 0 :(得分：0)
您缺少休息语句
case XmlPullParser.START_TAG:
break;
您可以使用以下内容作为参考。我希望代码是自我解释的。
如果您需要更多信息，请查看文档有一个很好的例子。
http://developer.android.com/training/basics/network-ops/xml.html
public class XMLPullParserHandler {
private String text;
public XMLPullParserHandler() {
}
public Void parse(InputStream is) { // pass input stream
XmlPullParserFactory factory = null;
XmlPullParser parser = null;
try {
factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
parser = factory.newPullParser();
parser.setInput(is, null);
int eventType = parser.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
String tagname = parser.getName();
switch (eventType) {
case XmlPullParser.START_TAG:
if (tagname.equalsIgnoreCase("question")) {
}
else if (tagname.equalsIgnoreCase("answer")) { // is answer get the attribute
Log.i("Attribute true/false is",""+parser.getAttributeValue(null, "correct"));
}
break;
case XmlPullParser.TEXT:
text = parser.getText();
break;
case XmlPullParser.END_TAG: // end tag
if (tagname.equalsIgnoreCase("question")) {
// add employee object to list
} else if (tagname.equalsIgnoreCase("text")) { // if text log the vlaue
Log.i("Question is",text);
} else if (tagname.equalsIgnoreCase("answer")) { // if answer log the value
Log.i("answer is",text);
}
break;
default:
break;
}
eventType = parser.next();
}
} catch (XmlPullParserException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
日志：
02-27 10:36:09.976: I/Question is(1955): Most?
02-27 10:36:09.976: I/Attribute true/false is(1955): false
02-27 10:36:09.976: I/answer is(1955): 10
02-27 10:36:09.986: I/Attribute true/false is(1955): true
02-27 10:36:09.986: I/answer is(1955): 11
02-27 10:36:09.986: I/Attribute true/false is(1955): false
02-27 10:36:09.986: I/answer is(1955): 8
02-27 10:36:09.986: I/Attribute true/false is(1955): false
02-27 10:36:09.986: I/answer is(1955): 9
02-27 10:36:09.986: I/Question is(1955): Which?
02-27 10:36:09.986: I/Attribute true/false is(1955): false
02-27 10:36:09.986: I/answer is(1955): Titanic
02-27 10:36:09.986: I/Attribute true/false is(1955): false
02-27 10:36:09.986: I/answer is(1955): American
02-27 10:36:09.986: I/Attribute true/false is(1955): true
02-27 10:36:09.986: I/answer is(1955): :King
02-27 10:36:09.996: I/Attribute true/false is(1955): false
02-27 10:36:09.996: I/answer is(1955): Yes
02-27 10:36:09.996: I/Question is(1955): First?
02-27 10:36:09.996: I/Attribute true/false is(1955): false
02-27 10:36:09.996: I/answer is(1955): John
02-27 10:36:09.996: I/Attribute true/false is(1955): true
02-27 10:36:09.996: I/answer is(1955): James
02-27 10:36:09.996: I/Attribute true/false is(1955): false
02-27 10:36:09.996: I/answer is(1955): Peter
02-27 10:36:09.996: I/Attribute true/false is(1955): false
02-27 10:36:09.996: I/answer is(1955): Jean
答案 1 :(得分：0)
发布代码的问题在于START_TAG案例正在落入TEXT案例。因此，在循环的第二次迭代中，遇到类型问题的START_TAG，但代码将其视为TEXT事件。
顺便说一句，为标签之间的每个字符串返回TEXT事件（而不是容易混淆的'text'元素）。要查看这意味着什么，请尝试使用此简化代码并检查日志。
while (eventType != XmlPullParser.END_DOCUMENT) {
Log.i(TAG, String.format("Starting new iteration with name [%s]", xpp.getName()));
switch (eventType){
case XmlPullParser.START_DOCUMENT:
Log.i(TAG, " found START_DOCUMENT");
break;
case XmlPullParser.START_TAG:
Log.i(TAG, " found START_TAG");
break;
case XmlPullParser.TEXT:
Log.i(TAG, String.format(" found TEXT with [%s]", xpp.getText()));
break;
case XmlPullParser.END_TAG:
Log.i(TAG, " found END_TAG");
}
eventType = xpp.next();
}
对于该代码片段，完整的第一个问题元素的日志输出如下所示：
Starting new iteration with name [null]
found START_DOCUMENT
Starting new iteration with name [question]
found START_TAG
Starting new iteration with name [null]
found TEXT with [
]
Starting new iteration with name [text]
found START_TAG
Starting new iteration with name [null]
found TEXT with [Most?]
Starting new iteration with name [text]
found END_TAG
Starting new iteration with name [null]
found TEXT with [
]
Starting new iteration with name [answer]
found START_TAG
Starting new iteration with name [null]
found TEXT with [10]
Starting new iteration with name [answer]
found END_TAG
Starting new iteration with name [null]
found TEXT with [
]
Starting new iteration with name [answer]
found START_TAG
Starting new iteration with name [null]
found TEXT with [11]
Starting new iteration with name [answer]
found END_TAG
Starting new iteration with name [null]
found TEXT with [
]
Starting new iteration with name [answer]
found START_TAG
Starting new iteration with name [null]
found TEXT with [8]
Starting new iteration with name [answer]
found END_TAG
Starting new iteration with name [null]
found TEXT with [
]
Starting new iteration with name [answer]
found START_TAG
Starting new iteration with name [null]
found TEXT with [9]
Starting new iteration with name [answer]
found END_TAG
Starting new iteration with name [null]
found TEXT with [
]
Starting new iteration with name [question]
found END_TAG