安卓：如何读取URL的XML数据 [英] Android : how to read XML data in URL
本文介绍了安卓：如何读取URL的XML数据的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我要读URL的XML数据，并以不同的方式都试过了。但无法找到答案。亚姆开发agumented现实应用，从XML（这是采用URL），其中IAM读取位置信息
荫新蜂到Android以及
我有以下的XML数据。
＆LT; specialoffers＆GT;
＆LT;类别和GT;
＆LT;类别及GT;
＆LT;！[CDATA [0％分期付款计划信息]＆GT;
＆LT; /类别＆GT;
＆LT;＆商人GT;
＆LT;＆MERCHANTNAME GT;
＆LT;！[CDATA [EmaxIPP]＆GT;
＆LT; / MERCHANTNAME＆GT;
＆LT; merchantbigimage＆GT;
＆LT;！[CDATA [
http://www.XXX.com/Images/Emax%20New%20-%20190x73-1_tcm20-48180.jpg
]]＆GT;
＆LT; / merchantbigimage＆GT;
＆LT; merchantsmallimage＆GT;
＆LT;！[CDATA [
http://www.XXX.com/Images/Emax%20New%20-%20104x75-1_tcm20-48179.jpg
]]＆GT;
＆LT; / merchantsmallimage＆GT;
＆LT; merchantmobileimage＆GT;
＆LT;！[CDATA [http://www.XXX.com]＆GT;
＆LT; / merchantmobileimage＆GT;
＆LT; mobilehighlight＆GT;
＆LT;！[CDATA [
享受0％分期付款计划3个月
所有购买制作和LT; / B＆GT;
]]＆GT;
＆LT; / mobilehighlight＆GT;
＆LT;高亮＆GT;
＆LT;！[CDATA [
享受0％分期付款计划对所有购买3个月
使用＆lt作出; / B＆GT;
]]＆GT;
＆LT; /高光＆GT;
＆LT;地点和GT;
＆LT;地点＆gt;
＆LT;＆酋长国GT;
＆LT;！[CDATA [XXX]]＆GT;
＆LT; /迪拜＆GT;
＆LT;地址＆gt;
＆LT;！[CDATA [中央1]＆GT;
＆LT; /地址＆gt;
＆LT;纬度和GT;
＆LT;！[CDATA [51.169601]＆GT;
＆LT; /纬度和GT;
＆LT;经度＆GT;
＆LT;！[CDATA [61.240395]＆GT;
＆LT; /经度＆GT;
＆LT; /地点＆gt;
＆LT; /客商与GT; ＆LT; /类别和GT;
＆LT; / specialoffers＆GT;
下面是code ....
AndroidXMLParsingActivity.java
公共类AndroidXMLParsingActivity扩展ListActivity {//所有静态变量
静态最终字符串URL =http://www.adcb.com/specialoffers-test.xml;
// XML节点键
静态最后弦乐KEY_ITEM =类别; //父节点
静态最后弦乐KEY_ID =类别;
@覆盖
公共无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.main）;ArrayList的＆LT;＆HashMap的LT;字符串，字符串＆GT;＆GT;菜单项=
新的ArrayList＆LT;＆HashMap的LT;字符串，字符串＆GT;＆GT;（）;XMLParser的解析器=新XMLParser的（）;
字符串XML = parser.getXmlFromUrl（URL）; //获取XML文档的文档= parser.getDomElement（XML）; //获得DOM元素节点列表NL = doc.getElementsByTagName（KEY_ITEM）;
项目＆GT; //遍历所有项目节点＆LT循环;
的for（int i = 0; I＆LT; nl.getLength（）;我++）{
//创建新的HashMap
HashMap的＆LT;字符串，字符串＆GT;地图=新的HashMap＆LT;字符串，字符串＆GT;（）;
元素e =（元）nl.item（I）
//将每个子节点的HashMap键=＆GT;值
map.put（KEY_ID，parser.getValue（即KEY_ID））;
//添加HashList到ArrayList的
menuItems.add（地图）;
}//添加菜单项到ListView控件
ListAdapter适配器=新SimpleAdapter（这一点，菜单项，
R.layout.list_item，
新的String [] {KEY_ID，KEY_DESC，100}，新的INT [] {
R.id.name，R.id.desciption，R.id.cost}）;setListAdapter（适配器）;//选择单个ListView项
ListView控件LV = getListView（）;lv.setOnItemClickListener（新OnItemClickListener（）{ @覆盖
公共无效onItemClick（适配器视图＆LT;＆GT;母公司，观景，
INT位置，长的id）{
//从选定的ListItem得到的值
字符串名称=（（TextView中）
view.findViewById（R.id.name））的getText（）的toString（）。
串成本=（（TextView中）
view.findViewById（R.id.cost））的getText（）的toString（）。
字符串描述=（（TextView中）
view.findViewById（R.id.desciption））的getText（）的toString（）。 //开始新意图
在意向=新意图（getApplicationContext（）
SingleMenuItemActivity.class）;
in.putExtra（KEY_ID，名）;
in.putExtra（100，成本）;
in.putExtra（KEY_DESC，说明）;
startActivity（在）; }
}）;
}
}
XMLParser.java
公共XMLParser类{//构造
公共XMLParser的（）{}/ **
*从URL获取XML使得HTTP请求
* @参数的URL字符串
* * /
公共字符串getXmlFromUrl（字符串URL）{
字符串XML = NULL; 尝试{
// defaultHttpClient
DefaultHttpClient的HttpClient =新DefaultHttpClient（）;
HttpPost httpPost =新HttpPost（URL）; HTT presponse HTT presponse = httpClient.execute（httpPost）;
HttpEntity httpEntity = HTT presponse.getEntity（）;
XML = EntityUtils.toString（httpEntity）; }赶上（UnsupportedEncodingException五）{
e.printStackTrace（）;
}赶上（ClientProtocolException E）{
e.printStackTrace（）;
}赶上（IOException异常五）{
e.printStackTrace（）;
}
//返回XML
返回XML;
}/ **
*获取XML DOM元素
* @参数XML字符串
* * /
公开文件getDomElement（字符串XML）{
文档DOC = NULL;
DBF的DocumentBuilderFactory = DocumentBuilderFactory.newInstance（）;
尝试{ 的DocumentBuilder分贝= dbf.newDocumentBuilder（）; InputSource的是=新的InputSource（）;
is.setCharacterStream（新StringReader（XML））;
DOC = db.parse（是）; }赶上（的ParserConfigurationException E）{
Log.e（错误，e.getMessage（））;
返回null;
}赶上（SAXException的E）{
Log.e（错误，e.getMessage（））;
返回null;
}赶上（IOException异常五）{
Log.e（错误，e.getMessage（））;
返回null;
} 返回文档;
}/ **获取节点值
* @参数ELEM元素
* /
公共最后弦乐getElementValue（节点ELEM）{
子节点;
如果（ELEM！= NULL）{
如果（elem.hasChildNodes（））{
对于（孩子= elem.getFirstChild（！）;孩子= NULL;儿童=
child.getNextSibling（））{
如果（child.getNodeType（）== Node.TEXT_NODE）{
返回child.getNodeValue（）;
}
}
}
}
返回;
} / **
*获取节点值
* @参数Element节点
* @参数密钥字符串
* * /
公共字符串的getValue（元素项，字符串str）{
节点列表N = item.getElementsByTagName（STR）;
返回this.getElementValue（n.item（0））;
}
}
SingleMenuItemActivity.java
公共类SingleMenuItemActivity延伸活动{// XML节点键
静态最后弦乐KEY_ID =类别;
静态最后弦乐KEY_COST =成本;
静态最后弦乐KEY_DESC =说明;
@覆盖
公共无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.single_list_item）; //获取数据的意图
在意向= getIntent（）; //从previous意图XML值
字符串名称= in.getStringExtra（KEY_ID）;
串成本= in.getStringExtra（KEY_COST）;
字符串描述= in.getStringExtra（KEY_DESC）; //在屏幕上显示的所有值
TextView的lblName =（的TextView）findViewById（R.id.name_label）;
TextView的lblCost =（的TextView）findViewById（R.id.cost_label）;
TextView的lblDesc =（的TextView）findViewById（R.id.description_label）; lblName.setText（名）;
lblCost.setText（成本）;
lblDesc.setText（介绍）;
}
}
解决方案
使用的 SimpleXML的 XML解析API为Android它会让你的编码很容易。
I want to read XML data from URL and have tried in different ways. But unable to find the answer. Iam developing a agumented reality application, where iam reading location information from XML ( which is in URL )
Iam new bee to android as well
I have the following XML data.
<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>
Here is the code....
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);
}
}
解决方案
Use SimpleXml xml parsing API for android it'll make your coding easy.
这篇关于安卓：如何读取URL的XML数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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