Question

我想从URL读取XML数据并尝试过不同的方式。但无法找到答案。我开发了一个agumented reality应用程序，iam从XML读取位置信息（在URL中）

Iam新蜜蜂到了安卓手机

我有以下XML数据。

<specialoffers>
<categories>
<category>
      <![CDATA[ 0% Installment Payment Plan Offers ]]>
</category>
<merchants>
     <merchantname>
             <![CDATA[ EmaxIPP ]]>
     </merchantname>
     <merchantbigimage>
             <![CDATA[
             http://www.XXX.com/Images/Emax%20New%20-%20190x73-1_tcm20-48180.jpg      
      ]]>
     </merchantbigimage>
     <merchantsmallimage>
             <![CDATA[
             http://www.XXX.com/Images/Emax%20New%20-%20104x75-1_tcm20-48179.jpg
              ]]>
             </merchantsmallimage>
     <merchantmobileimage>
             <![CDATA[ http://www.XXX.com ]]>
     </merchantmobileimage>
     <mobilehighlight>
             <![CDATA[
            Enjoy 0% Installment Payment Plan for 3 months on 
            all purchases made </b>
            ]]>
     </mobilehighlight>
     <highlight>
            <![CDATA[
            Enjoy 0% Installment Payment Plan for 3 months on all purchases
            made with  your </b>
            ]]>
      </highlight>
     <locations>
          <location>
               <emirate>
                   <![CDATA[ XXX]]>
               </emirate>
               <address>
                   <![CDATA[ Center 1 ]]>
               </address>
               <latitude>
                   <![CDATA[ 51.169601 ]]>
              </latitude>
              <longitude>
                   <![CDATA[ 61.240395 ]]>
              </longitude>
          </location>
     </merchants>

   </categories>
</specialoffers>

这是代码......

AndroidXMLParsingActivity.java

public class AndroidXMLParsingActivity extends ListActivity {

// All static variables
static final String URL = "http://www.adcb.com/specialoffers-test.xml";
// XML node keys
static final String KEY_ITEM = "categories"; // parent node
static final String KEY_ID = "category";


@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

ArrayList<HashMap<String, String>> menuItems = 
                                 new ArrayList<HashMap<String,   String>>();

XMLParser parser = new XMLParser();
String xml = parser.getXmlFromUrl(URL); // getting XML

Document doc = parser.getDomElement(xml); // getting DOM element

NodeList nl = doc.getElementsByTagName(KEY_ITEM);
// looping through all item nodes <item>
for (int i = 0; i < nl.getLength(); i++) {
    // creating new HashMap
    HashMap<String, String> map = new HashMap<String, String>();
    Element e = (Element) nl.item(i);
    // adding each child node to HashMap key => value
    map.put(KEY_ID, parser.getValue(e, KEY_ID));
    // adding HashList to ArrayList
    menuItems.add(map);
}

// Adding menuItems to ListView
ListAdapter adapter = new SimpleAdapter(this, menuItems,
        R.layout.list_item,
        new String[] { KEY_ID, "KEY_DESC", "100" }, new int[] {
                R.id.name, R.id.desciption, R.id.cost });

setListAdapter(adapter);

// selecting single ListView item
ListView lv = getListView();

lv.setOnItemClickListener(new OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> parent, View view,
            int position, long id) {
        // getting values from selected ListItem
        String name = ((TextView)  
                                  view.findViewById(R.id.name)).getText().toString();
        String cost = ((TextView) 
                                   view.findViewById(R.id.cost)).getText().toString();
        String description = ((TextView)
                              view.findViewById(R.id.desciption)).getText().toString();

        // Starting new intent
        Intent in = new Intent(getApplicationContext(),  
                                    SingleMenuItemActivity.class);
        in.putExtra(KEY_ID, name);
        in.putExtra("100", cost);
        in.putExtra("KEY_DESC", description);
        startActivity(in);

    }
});
}
}

XMLParser.java

public class XMLParser {

// constructor
public XMLParser() {

}

/**
 * Getting XML from URL making HTTP request
 * @param url string
 * */
public String getXmlFromUrl(String url) {
    String xml = null;

    try {
        // defaultHttpClient
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);

        HttpResponse httpResponse = httpClient.execute(httpPost);
        HttpEntity httpEntity = httpResponse.getEntity();
        xml = EntityUtils.toString(httpEntity);

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    // return XML
    return xml;
}

/**
 * Getting XML DOM element
 * @param XML string
 * */
public Document getDomElement(String xml){
    Document doc = null;
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    try {

        DocumentBuilder db = dbf.newDocumentBuilder();

        InputSource is = new InputSource();
            is.setCharacterStream(new StringReader(xml));
            doc = db.parse(is); 

        } catch (ParserConfigurationException e) {
            Log.e("Error: ", e.getMessage());
            return null;
        } catch (SAXException e) {
            Log.e("Error: ", e.getMessage());
            return null;
        } catch (IOException e) {
            Log.e("Error: ", e.getMessage());
            return null;
        }

        return doc;
}

/** Getting node value
  * @param elem element
  */
 public final String getElementValue( Node elem ) {
     Node child;
     if( elem != null){
         if (elem.hasChildNodes()){
             for( child = elem.getFirstChild(); child != null; child =   
child.getNextSibling() ){
                 if( child.getNodeType() == Node.TEXT_NODE  ){
                     return child.getNodeValue();
                 }
             }
         }
     }
     return "";
 }

 /**
  * Getting node value
  * @param Element node
  * @param key string
  * */
 public String getValue(Element item, String str) {     
        NodeList n = item.getElementsByTagName(str);        
        return this.getElementValue(n.item(0));
    }
}

SingleMenuItemActivity.java

public class SingleMenuItemActivity  extends Activity {

// XML node keys
static final String KEY_ID = "category";
static final String KEY_COST = "cost";
static final String KEY_DESC = "description";
@Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.single_list_item);

    // getting intent data
    Intent in = getIntent();

    // Get XML values from previous intent
    String name = in.getStringExtra(KEY_ID);
    String cost = in.getStringExtra(KEY_COST);
    String description = in.getStringExtra(KEY_DESC);

    // Displaying all values on the screen
    TextView lblName = (TextView) findViewById(R.id.name_label);
    TextView lblCost = (TextView) findViewById(R.id.cost_label);
    TextView lblDesc = (TextView) findViewById(R.id.description_label);

    lblName.setText(name);
    lblCost.setText(cost);
    lblDesc.setText(description);
}
}

Answer 1

您可以像这样使用xmlpullparser：

XmlPullParserFactory pullParserFactory;
        try {
            pullParserFactory = XmlPullParserFactory.newInstance();
            XmlPullParser parser = pullParserFactory.newPullParser();
        } catch (XmlPullParserException e) {

            e.printStackTrace();
        }

我找到了一个根据您的需要展示相同示例的链接。请仔细阅读link

或者只是去android方式。开发人员指南link

希望它对你有所帮助。

Answer 2

对于Android使用SimpleXml xml解析API，它将使您的编码变得容易。

Android：如何在URL中读取XML数据

2 个答案: