【发布时间】：2012-05-17 12:23:27
【问题描述】：
这是我的 xml 结构：
<menu>
<item_category>
<category_name>ICECREAM</category_name>
<item>
<item_name>SOFTY</item_name>
<item_price>7.00</item_price>
</item>
<item>
<item_name>STICK</item_name>
<item_price>15.00</item_price>
</item>
<item>
<item_name>CONE</item_name>
<item_price>25.00</item_price>
</item>
</item_category>
<item_category>
<category_name>PIZZA</category_name>
<item>
<item_name>PIZZA-HOT</item_name>
<item_price>35.00</item_price>
</item>
<item>
<item_name>PIZZA-CRISPY</item_name>
<item_price>29.00</item_price>
</item>
</item_category>
</menu>
这是我正在解析为列表视图的代码
public class AndroidXMLParsingActivity extends ListActivity {
// All static variables
//static final String URL = "http://api.androidhive.info/pizza/?format=xml";
static final String URL = "http://192.168.1.112/dine/index.php/dineout/mob_view";
//static final String URL = "http://192.168.1.112/dineout/index.php/dineout/view";
// XML node keys
static final String KEY_MENU= "menu"; // parent node
//static final String KEY_ID = "foodjoint_id";
static final String KEY_CATEGORY= "category_name";
static final String KEY_ITEM= "item";
static final String KEY_ITEM_NAME= "item_name";
static final String KEY_PRICE= "item_price";
@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++)
{
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
map.put(KEY_CATEGORY, parser.getValue(e,KEY_CATEGORY));
map.put(KEY_ITEM_NAME, parser.getValue(e, KEY_ITEM_NAME));
map.put(KEY_PRICE, parser.getValue(e, KEY_PRICE));
menuItems.add(map);
}
// Adding menuItems to ListView
ListAdapter adapter = new SimpleAdapter(this, menuItems,
R.layout.list_item,
new String[] {KEY_CATEGORY,KEY_ITEM_NAME,KEY_PRICE}, new int[] {R.id.category,R.id.name,R.id.costlab });
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 category = ((TextView) view.findViewById(R.id.category)).getText().toString();
String name = ((TextView) view.findViewById(R.id.name)).getText().toString();
//String description = ((TextView) view.findViewById(R.id.desciption)).getText().toString();
String cost = ((TextView) view.findViewById(R.id.cost)).getText().toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
//in.putExtra(KEY_ITEM, name);
in.putExtra(KEY_CATEGORY, category);
in.putExtra(KEY_ITEM_NAME,name);
in.putExtra(KEY_PRICE, cost);
//in.putExtra(KEY_DESC, description);
startActivity(in);
}
});
}
}
我的问题是我没有得到 category_name 的值。我尝试使用嵌套循环，但它都一样。请帮我 。我应该在代码中更改什么。
这是我的 xmlParser
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));
}
【问题讨论】：
-
@derekerdmann 抱歉，我无法了解您要更改的内容
-
最后一个块中的第一行代码没有缩进，我只是把它推到同一个格式化块中。您可以通过单击问题底部的“已编辑 N 分钟前”来查看差异。
-
另外，请查看常见问题解答以获取有关编辑的更多信息：stackoverflow.com/faq#editing
-
得到它与否比我添加我的答案
-
@khan 抱歉回复晚了，我会检查
标签： android xml-parsing