【发布时间】：2012-10-04 08:40:56
【问题描述】：
我需要在 android 中使用 DOM 解析器来解析文档。我无法打印所有节点值 我的示例 XML 是：`
<xml_api_reply version="1">
<news module_id="0" tab_id="0" mobile_row="0" mobile_zipped="1" row="0" section="0">
<title data="Top Stories"/>
<section_type data="0"/>
<news_entry>
<title data="BSE Sensex breaches 19000, Nifty above 5800"/>
<url data="http://in.reuters.com/article/2012/10/04/sensex-above-19000-on-reform-hopes- idINDEE89301O20121004"/>
<snippet data="| MUMBAI (Reuters) - The Nifty rose above 5800 points on Thursday, joining the Sensex in breaching key psychological levels, after continued government reform measures sparked hopes for continued action. Banks led gainers, with ICICI Bank (ICBK."/>
<source data="Reuters India"/>
<date data="3 hours ago"/>
<num_related data="145"/>
<cluster_url data="http://google.co.in/news/story?ncl=da6VmeBXmuquikM&hl=en"/>
</news_entry>
<news_entry>
<title data="Uncertainty over Kingfisher resuming operations tomorrow"/>
<url data="http://www.hindustantimes.com/India-news/NewDelhi/Uncertainty-over- Kingfisher-resuming-operations-tomorrow/Article1-939628.aspx"/>
<snippet data="Hopes of ailing Kingfisher Airlines resuming operations on Friday has faded with last ditch efforts by the management to persuade striking engineers and pilots to return to work failing to end the deadlock over the issue of non-payment of salaries for ..."/>
<source data="Hindustan Times"/>
<date data="1 hour ago"/>
<num_related data="993"/>
<cluster_url data="http://google.co.in/news/story?ncl=dzf460GzYKTOyxM&hl=en"/>
</news_entry>
</news>
</xml_api_reply>`
我正在使用以下代码来解析 xml
xmlactivity.java
public class AndroidXMLParsingActivity extends ListActivity {
// All static variables
static final String URL = "http://www.google.co.in/ig/api?news&hl=en";
// XML node keys
static final String KEY_ITEM = "news"; // parent node
//static final String KEY_ID = "news_entry";
static final String KEY_NAME = "title ";
static final String KEY_COST = "url ";
static final String KEY_DESC = "snippet";
@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));
map.put(KEY_NAME, parser.getValue(e, KEY_NAME));
//map.put(KEY_COST, parser.getValue(e, KEY_COST));
//map.put(KEY_DESC, parser.getValue(e, KEY_DESC));
// adding HashList to ArrayList
menuItems.add(map);
}
// Adding menuItems to ListView
/* ListAdapter adapter = new SimpleAdapter(this, menuItems,
R.layout.list_item,
new String[] { KEY_NAME, KEY_DESC, KEY_COST }, new int[] {
R.id.name, R.id.desciption, R.id.cost });*/
ListAdapter adapter = new SimpleAdapter(this, menuItems,
R.layout.list_item,
new String[] { KEY_NAME }, new int[] {
R.id.name});
setListAdapter(adapter);
// selecting single ListView item
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
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_NAME, name);
//in.putExtra(KEY_COST, cost);
in.putExtra(KEY_DESC, description);
startActivity(in);
}
});
和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));
}
}
请帮助我。有什么问题和建议 提前谢谢！！！！！！！！！
【问题讨论】：
-
我只是建议你使用 Sax 或 XmlPullParser 而不是 DOM。
标签： android android-layout android-intent android-widget