我正在从 URL 解析 XML。从原始文件夹中解析相同的 XML 文件进行了哪些更改。对如何减少代码有任何想法吗？
这是我的 xml 文件：umesh.xml
<?xml version="1.0" encoding="utf-8"?>
<appdata>
<brand name="Lovely Products">
<product>Hat</product>
<product>Gloves</product>
</brand>
<brand name="Great Things">
<product>Table</product>
<product>Chair</product>
<product>Bed</product>
</brand>
</appdata>
下面是我的java文件：
数据处理程序.java
package com.umesh.xmlparsing; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.URL; import java.net.URLConnection; import java.util.ArrayList; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.xml.sax.Attributes; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import org.xml.sax.XMLReader; import org.xml.sax.helpers.DefaultHandler; import android.content.Context; import android.content.res.XmlResourceParser; import android.graphics.Color; import android.util.Log; import android.widget.TextView; public class DataHandler extends DefaultHandler{ //list for imported product data private ArrayList<TextView> theViews; //string to track each entry private String currBrand = ""; //flag to keep track of XML processing private boolean isProduct = false; //context for user interface private Context theContext; //constructor public DataHandler(Context cont) { super(); theViews = new ArrayList<TextView>(); theContext = cont; } //start of the XML document public void startDocument () { Log.i("DataHandler", "Start of XML document"); } //end of the XML document public void endDocument () { Log.i("DataHandler", "End of XML document"); } //opening element tag public void startElement (String uri, String name, String qName, Attributes atts) { //handle the start of an element //find out if the element is a brand if(qName.equals("brand")) { //set product tag to false isProduct = false; //create View item for brand display TextView brandView = new TextView(theContext); brandView.setTextColor(Color.rgb(73, 136, 83)); //add the attribute value to the displayed text String viewText = "Items from " + atts.getValue("name") + ":"; brandView.setText(viewText); //add the new view to the list theViews.add(brandView); } //the element is a product else if(qName.equals("product")) isProduct = true; } //closing element tag public void endElement (String uri, String name, String qName) { //handle the end of an element if(qName.equals("brand")) { //create a View item for the products TextView productView = new TextView(theContext); productView.setTextColor(Color.rgb(192, 199, 95)); //display the compiled items productView.setText(currBrand); //add to the list theViews.add(productView); //reset the variable for future items currBrand = ""; } } //element content public void characters (char ch[], int start, int length) { //process the element content //string to store the character content String currText = ""; //loop through the character array for (int i=start; i<start+length; i++) { switch (ch[i]) { case '\\': break; case '"': break; case '\n': break; case '\r': break; case '\t': break; default: currText += ch[i]; break; } } //prepare for the next item if(isProduct && currText.length()>0) currBrand += currText+"\n"; } public ArrayList<TextView> getData() { //take care of SAX, input and parsing errors try { //set the parsing driver System.setProperty("org.xml.sax.driver","org.xmlpull.v1.sax2.Driver"); //create a parser SAXParserFactory parseFactory = SAXParserFactory.newInstance(); SAXParser xmlParser = parseFactory.newSAXParser(); //get an XML reader XMLReader xmlIn = xmlParser.getXMLReader(); //instruct the app to use this object as the handler xmlIn.setContentHandler(this); //provide the name and location of the XML file **ALTER THIS FOR YOUR FILE** URL xmlURL = new URL("http://mydomain.com/umesh.xml"); //open the connection and get an input stream URLConnection xmlConn = xmlURL.openConnection(); InputStreamReader xmlStream = new InputStreamReader(xmlConn.getInputStream()); //build a buffered reader BufferedReader xmlBuff = new BufferedReader(xmlStream); // uuu XmlResourceParser todolistXml = getResources().getXml(R.raw.c4mh_clinics); //parse the data xmlIn.parse(new InputSource(xmlBuff)); } catch(SAXException se) { Log.e("AndroidTestsActivity", "SAX Error " + se.getMessage()); } catch(IOException ie) { Log.e("AndroidTestsActivity", "Input Error " + ie.getMessage()); } catch(Exception oe) { Log.e("AndroidTestsActivity", "Unspecified Error " + oe.getMessage()); } //return the parsed product list return theViews; } }XMLParsing.java
package com.umesh.xmlparsing; import java.util.ArrayList; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater; import android.widget.LinearLayout; import android.widget.TextView; public class XMLParsing extends Activity { TextView tv; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //get a reference to the layout LayoutInflater inflater = getLayoutInflater(); LinearLayout mainLayout = (LinearLayout) inflater.inflate(R.layout.main,null); try { //create an instance of the DefaultHandler class //**ALTER THIS FOR YOUR CLASS NAME** DataHandler handler = new DataHandler(getApplicationContext()); //get the string list by calling the public method ArrayList<TextView> newViews = handler.getData(); //convert to an array Object[] products = newViews.toArray(); //loop through the items, creating a View item for each for(int i=0; i<products.length; i++) { //add the next View in the list mainLayout.addView((TextView)products[i]); } } catch(Exception pce) { Log.e("AndroidTestsActivity", "PCE "+pce.getMessage()); } setContentView(mainLayout); } }