[英]Parse XML using DOM in android
嗨,我想解析XML并根据用户选择显示列表
我的xml看起来像这样
下面是我的代码
try {
XMLParser parser = new XMLParser();
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList n1 = doc.getElementsByTagName("company");
// looping through all item nodes <item>
for (int i = 0; i < n1.getLength(); i++) {
// creating new HashMap
Element e = (Element) n1.item(i);
System.out.println("name node "+parser.getValue(e, "name"));
}
通过这种方式,我得到的输出像
Company ABC
Company XYZ
公司列表
但
我会写像
NodeList n1 = doc.getElementsByTagName("province");
// looping through all item nodes <item>
for (int i = 0; i < n1.getLength(); i++) {
// creating new HashMap
Element e = (Element) n1.item(i);
System.out.println("name node "+parser.getValue(e, "name"));
}
我正在获取省名列表
Alberta
Ontario
New York
Florida
但它应该像这样工作
当我选择公司ABC
仅显示两个供应清单
Alberta
Ontario
并非所有显示器都可以帮助我重写代码
在“公司”节点上使用Node.getChildNodes()
。 然后,要获取子省节点,请按名称进行比较。 例:
XMLParser parser = new XMLParser();
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList n1 = doc.getElementsByTagName("company");
// looping through all item nodes <item>
for (int i = 0; i < n1.getLength(); i++) {
Node companyNode = n1.item(i);
NodeList childNodes = companyNode.getChildNodes();
// Here we're getting child nodes inside the company node.
// Only direct childs will be returned (name and province)
for (int j = 0; j < childNodes.getLength(); j++) {
Node childNode = childNodes.item(j);
if("province".equalsIgnoreCase(childNode.getName())){
//Do something with province
}
}
}
应该这样做:
XMLParser parser = new XMLParser();
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList n1 = doc.getElementsByTagName("company");
// looping through all item nodes <item>
for (int i = 0; i < n1.getLength(); i++) {
Element e = (Element) n1.item(i);
System.out.println("name node " +parser.getValue(e, "name"));
NodeList children = e.getChildNodes();
for (int j = 0; j < children.getLength(); j++) {
Node child = children.item(j);
if (child.getNodeName().equalsIgnoreCase("province")) {
System.out.println("name node " + parser.getValue((Element)child, "name"));
}
}
}
尝试以下代码:
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/** Create a new layout to display the view */
LinearLayout layout = new LinearLayout(this);
layout.setOrientation(1);
/** Create a new textview array to display the results */
TextView name[];
TextView website[];
TextView category[];
try {
URL url = new URL(
"http://xyz.com/aa.xml");
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new InputSource(url.openStream()));
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getElementsByTagName("item");
/** Assign textview array lenght by arraylist size */
name = new TextView[nodeList.getLength()];
website = new TextView[nodeList.getLength()];
category = new TextView[nodeList.getLength()];
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
name[i] = new TextView(this);
website[i] = new TextView(this);
category[i] = new TextView(this);
Element fstElmnt = (Element) node;
NodeList nameList = fstElmnt.getElementsByTagName("name");
Element nameElement = (Element) nameList.item(0);
nameList = nameElement.getChildNodes();
name[i].setText("Name = "
+ ((Node) nameList.item(0)).getNodeValue());
NodeList websiteList = fstElmnt.getElementsByTagName("website");
Element websiteElement = (Element) websiteList.item(0);
websiteList = websiteElement.getChildNodes();
website[i].setText("Website = "
+ ((Node) websiteList.item(0)).getNodeValue());
category[i].setText("Website Category = "
+ websiteElement.getAttribute("category"));
layout.addView(name[i]);
layout.addView(website[i]);
layout.addView(category[i]);
}
} catch (Exception e) {
System.out.println("XML Pasing Excpetion = " + e);
}
/** Set the layout view to display */
setContentView(layout);
}
}
在文档对象上调用的getElementsBytagName将始终返回整个文档中具有给定标签名称的所有节点的列表。 相反,过滤掉您感兴趣的单个公司元素,然后在其上调用getElementsByTagName。 例如
Element companyEl = doc.getElementById(desiredCompanyId);
if (companyEl != null) { // always good to check
NodeList n1 = companyEl.getElementsByTagName("province");
// your code here
}
尝试使用此代码
for(int i = 0; i <nodeList.getLength(); i ++){
Node node = nodeList.item(i);
name[i] = new TextView(this);
website[i] = new TextView(this);
category[i] = new TextView(this);
Element fstElmnt = (Element) node;
NodeList nameList = fstElmnt.getElementsByTagName("name");
Element nameElement = (Element) nameList.item(0);
nameList = nameElement.getChildNodes();
name[i].setText("Name = "
+ ((Node) nameList.item(0)).getNodeValue());
NodeList websiteList = fstElmnt.getElementsByTagName("website");
Element websiteElement = (Element) websiteList.item(0);
websiteList = websiteElement.getChildNodes();
website[i].setText("Website = "
+ ((Node) websiteList.item(0)).getNodeValue());
category[i].setText("Website Category = "
+ websiteElement.getAttribute("category"));
layout.addView(name[i]);
layout.addView(website[i]);
layout.addView(category[i]);
}
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