XML解析

 package my.android.px;import java.net.URL;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.xml.sax.InputSource;import org.xml.sax.XMLReader;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.widget.TextView;public class ParsingXML extends Activity {private final String MY_DEBUG_TAG = "WeatherForcaster";/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);// setContentView(R.layout.main);TextView tv = new TextView(this);try {/* Create a URL we want to load some xml-data from. */URL url = new URL("http://www.anddev.org/images/tut/basic/parsingxml/example.xml");/* Get a SAXParser from the SAXPArserFactory. */SAXParserFactory spf = SAXParserFactory.newInstance();SAXParser sp = spf.newSAXParser();/* Get the XMLReader of the SAXParser we created. */XMLReader xr = sp.getXMLReader();/* Create a new ContentHandler and apply it to the XML-Reader */ExampleHandler myExampleHandler = new ExampleHandler();xr.setContentHandler(myExampleHandler);/* Parse the xml-data from our URL. */xr.parse(new InputSource(url.openStream()));/* Parsing has finished. *//* Our ExampleHandler now provides the parsed data to us. */ParsedExampleDataSet parsedExampleDataSet = myExampleHandler.getParsedData();/* Set the result to be displayed in our GUI. */tv.setText(parsedExampleDataSet.toString());} catch (Exception e) {/* Display any Error to the GUI. */tv.setText("Error: " + e.getMessage());Log.e(MY_DEBUG_TAG, "WeatherQueryError", e);}/* Display the TextView. */this.setContentView(tv);}}

 

package my.android.px;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;import org.xml.sax.Attributes;public class ExampleHandler extends DefaultHandler {// ===========================================================// Fields// ===========================================================private boolean in_outertag = false;private boolean in_innertag = false;private boolean in_mytag = false;private ParsedExampleDataSet myParsedExampleDataSet = new ParsedExampleDataSet();// ===========================================================// Getter & Setter// ===========================================================public ParsedExampleDataSet getParsedData() {return this.myParsedExampleDataSet;}// ===========================================================// Methods// ===========================================================@Overridepublic void startDocument() throws SAXException {this.myParsedExampleDataSet = new ParsedExampleDataSet();}@Overridepublic void endDocument() throws SAXException {// Nothing to do}/** * Gets be called on opening tags like: <tag> Can provide attribute(s), when * xml was like: <tag attribute="attributeValue"> */@Overridepublic void startElement(String namespaceURI, String localName,String qName, Attributes atts) throws SAXException {if (localName.equals("outertag")) {this.in_outertag = true;} else if (localName.equals("innertag")) {this.in_innertag = true;} else if (localName.equals("mytag")) {this.in_mytag = true;} else if (localName.equals("tagwithnumber")) {// Extract an AttributeString attrValue = atts.getValue("thenumber");int i = Integer.parseInt(attrValue);myParsedExampleDataSet.setExtractedInt(i);}}/** * Gets be called on closing tags like: </tag> */@Overridepublic void endElement(String namespaceURI, String localName, String qName)throws SAXException {if (localName.equals("outertag")) {this.in_outertag = false;} else if (localName.equals("innertag")) {this.in_innertag = false;} else if (localName.equals("mytag")) {this.in_mytag = false;} else if (localName.equals("tagwithnumber")) {// Nothing to do here}}/** * Gets be called on the following structure: <tag>characters</tag> */@Overridepublic void characters(char ch[], int start, int length) {if (this.in_mytag) {myParsedExampleDataSet.setExtractedString(new String(ch, start,length));}}}

package my.android.px;import java.util.regex.Matcher;import java.util.regex.Pattern;public class ParsedExampleDataSet {private String extractedString = "";private int extractedInt = 0;public String getExtractedString() {return extractedString;}public void setExtractedString(String extractedString) {extractedString = eregi_replace("(/r/n|/r|/n|/n/r)", "", extractedString);this.extractedString += extractedString;}public int getExtractedInt() {return extractedInt;}public void setExtractedInt(int extractedInt) {this.extractedInt = extractedInt;}public String toString() {return "ExtractedString = " + this.extractedString+ "/nExtractedInt = " + this.extractedInt;}private String eregi_replace(String strFrom, String strTo, String strTarget) {String strPattern = "(?i)" + strFrom;Pattern p = Pattern.compile(strPattern);Matcher m = p.matcher(strTarget);if (m.find()) {return strTarget.replaceAll(strFrom, strTo);} else {return strTarget;}}}

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="my.android.px" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".ParsingXML" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application><uses-permission android:name="android.permission.INTERNET"></uses-permission></manifest>