Parsing Single XML Node From Web Service Response

Question

I have seen a few questions in this general area, but cannot find anything specific to Java and pulling a single node value.

I have a Web Service that returns values formatted like so:

<string xmlns="http://tempuri.org/">Hello</string>

In the Android application, I am trying to retrieve the 'Hello' part in the middle without the XML tags.

I have currently a method like so to do this:

public static String getParsedString(String xml)
{
    try
    {
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
        InputSource input = new InputSource();
        StringReader stringReader = new StringReader(xml);
        input.setCharacterStream(stringReader);

        Document document = documentBuilder.parse(input);

        NodeList nodes = document.getElementsByTagName("string");
        return nodes.item(0).getNodeValue().toString();
    }
    catch(Exception ex)
    {
        ex.printStackTrace();
    }

    return null;
}

However the node being parsed apparently contains no data, as when trying the toString() method, it throws the following error.

java.lang.NullPointerException

I'm not sure I need to account for the xmlns="http://tempuri.org/" in the document parser, but I can't figure it out.

First try for the xml root element and then look for particular element — Balakrishna Avulapati
– Balakrishna Avulapati, Commented Feb 15, 2017 at 12:16

Henrik Aasted Sørensen · Accepted Answer · 2017-02-15 12:19:52Z

2

Change the line

return nodes.item(0).getNodeValue().toString();

to

return nodes.item(0).getTextContent();

answered Feb 15, 2017 at 12:19

Henrik Aasted Sørensen

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