从本地xml解析XML

Question

我正在解析来自URL的XML。从原始文件夹解析相同的XML文件做了哪些更改。有任何想法如何减少代码？

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：

1. DataHandler.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; 
   } 
   
   } 
   

2. 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); 
   } 
   
   
   } 
   

Answer 1

请参阅我的回答如下的链接，它会解决你的问题。

Local XML Parsing