Get XML Element Value by name - Android XML

Android examples for XML:XML Element

  1. HOME
  2. Android
  3. XML
  4. XML Element

Description

Get XML Element Value by name

Demo Code


import java.io.*;
import javax.xml.parsers.*;
import org.w3c.dom.*;

public class Main{
    private static Object GetElementValue(Element element, String name,
            XmlDataType dt, boolean throwIfNotFound) throws Exception {
        // find it...
        NodeList nodes = element.getElementsByTagName(name);
        if (nodes.getLength() == 1) {
            if (dt == XmlDataType.String)
                return GetStringValue(nodes.item(0));
            else if (dt == XmlDataType.Boolean)
                return (Boolean) GetBooleanValue(nodes.item(0));
            else if (dt == XmlDataType.Int32)
                return (Number) GetInt32Value(nodes.item(0));
            else//  w  w w.ja  v  a  2  s . c o  m
                throw new Exception(
                        String.format("Cannot handle '%s'.", dt));
        } else if (nodes.getLength() == 0) {
            if (throwIfNotFound)
                throw new Exception(
                        String.format(
                                "An element with name '%s' was not found within an element with name '%s'.",
                                name, element.getNodeName()));
            else
                return null;
        } else
            throw new Exception(String.format(
                    "Too many (%d) child elements were found.",
                    nodes.getLength()));
    }
    public static String GetStringValue(Node item) throws Exception {
        if (item instanceof Element) {
            Node node = item.getFirstChild();
            if (node != null)
                return node.getNodeValue();
            else
                return "";
        } else
            throw new Exception(String.format("Cannot handle '%s'.",
                    item.getClass()));
    }
    public static boolean GetBooleanValue(Node item) throws Exception {
        String asString = GetStringValue(item);
        if (asString.compareTo("0") == 0
                || asString.compareToIgnoreCase("false") == 0)
            return false;
        else if (asString.compareTo("1") == 0
                || asString.compareToIgnoreCase("true") == 0)
            return true;
        else
            throw new Exception(
                    String.format(
                            "The value '%s' could not be recognised as valid Boolean value.",
                            asString));
    }
    public static int GetInt32Value(Node item) throws Exception {
        String asString = GetStringValue(item);
        return Integer.parseInt(asString);
    }
}

Related Tutorials