我对 Java/Android 编程非常陌生，需要一些我正在编写的代码的帮助。我一直在关注“解析 XML 数据”文章，但没有成功。
“MainActivity.java”的意图将带有 XML 文本的字符串发送到我喜欢解析的“ParsingXMLStringActivity.java”。这是我成功完成活动的字符串。
<action><app>survo</app><parameters><id>5666</id><p_t>205</p_t></parameters></action>
现在，如果在以下“ParsingXMLStringActivity.java”中编写公共类 XmlParser
public class ParsingXMLStringActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_parsing_xmlstring);
// Get the message from the intent
Intent intent = getIntent();
String receivedXMLstring = intent.getStringExtra(MainActivity.Authorize.XML_STRING);
System.out.println("STRING:"+receivedXMLstring);
InputStream in_stream;
try {
in_stream = new ByteArrayInputStream(receivedXMLstring.getBytes("UTF-8"));
System.out.println("STREAM:"+ in_stream);
XmlParser XmlParser = new XmlParser();
System.out.println("XmlParser:"+ XmlParser);
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} // OnCreate
public class XmlParser {
public final String ns = null;
public List<Entry> parse (InputStream in_stream) throws XmlPullParserException, IOException {
try {
XmlPullParser parser = Xml.newPullParser();
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
parser.setInput(in_stream, null);
parser.nextTag();
return readAction(parser);
} finally {
in_stream.close();
}
} // Public List Parse
private List<Entry> readAction(XmlPullParser parser) throws XmlPullParserException, IOException {
List<Entry> action = new ArrayList<Entry>();
parser.require(XmlPullParser.START_TAG, ns, "action");
while (parser.next() != XmlPullParser.END_TAG) {
if (parser.getEventType() != XmlPullParser.START_TAG) {
continue;
}
String name = parser.getName();
// Starts by looking for the entry tag
if (name.equals("action")) {
action.add(readParameters(parser));
} else {
skip(parser);
}
}
System.out.println("ACTION: "+action);
return action;
} // Public List ReadAction
private void skip(XmlPullParser parser) throws XmlPullParserException, IOException {
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;
}
}
} //Private Void Skip
public class Entry {
public final String id;
public final String pt;
private Entry(String id, String pt) {
this.id = id;
this.pt = pt;
}
} // public static class Entry
private Entry readParameters(XmlPullParser parser) throws XmlPullParserException, IOException {
parser.require(XmlPullParser.START_TAG, ns, "entry");
String id = null;
String pt = null;
while (parser.next() != XmlPullParser.END_TAG) {
if (parser.getEventType() != XmlPullParser.START_TAG) {
continue;
}
String name = parser.getName();
if (name.equals("id")) {
id = readId(parser);
System.out.println("ID: "+ id);
} else if (name.equals("p_t")) {
pt = readPT(parser);
System.out.println("P_T: "+ pt);
}
else {
skip(parser);
}
}
return new Entry(id, pt);
} // Private Entry
// Processes title tags in the feed.
private String readId(XmlPullParser parser) throws IOException, XmlPullParserException {
parser.require(XmlPullParser.START_TAG, ns, "id");
String id = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "id");
System.out.println(id);
return id;
}
private String readPT(XmlPullParser parser) throws IOException, XmlPullParserException {
parser.require(XmlPullParser.START_TAG, ns, "p_t");
String pt = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "p_t");
System.out.println(pt);
return pt;
}
private String readText(XmlPullParser parser) throws IOException, XmlPullParserException {
String result = "";
if (parser.next() == XmlPullParser.TEXT) {
result = parser.getText();
parser.nextTag();
}
System.out.println(result);
return result;
}
}
没有向 LogCat 提供任何信息，System.out.println("ID: "+ id);我设置了断点来检查解析器是否已启动，但它似乎没有使用我提供的字符串启动解析过程。
有人有想法可以告诉我我缺少什么吗？？？
亲切的问候，本