Question

我想将XML解析为我的Android应用。我试过一个教程。在这里它使用DOMParser。应用程序中没有错误。但它没有显示XML输出。请帮我解决这个问题。这是我现在尝试的。

<?php
require_once($_SERVER["DOCUMENT_ROOT"].'/layout/layout.inc.php');
require_once($_SERVER["DOCUMENT_ROOT"].'/functions/general.inc.php');

$layout = new default_layout();

$layout->title('IT KB Search');

$layout->content("<div class='border'>");
$layout->content('<h1>IT Support Knowledge Base - Search Results</h1>');

if (isset($_GET['q'])) {
    $query = rawurlencode( strip_tags($_GET['q']));
    $timestamp = time();
    $baseUrl = 'https://oursite.atlassian.net/wiki';
    $url = $baseUrl.'/rest/api/content/search?cql=space=KB%20AND%20type=page%20AND%20title~'.$query; 

    // To enable authenticated search: 
    // $url .= "&os_username=$username&os_password=$password";

    $response = file_get_contents($url);
    $response = json_decode($response);
    $results = $response->results;

    # Change Starts
    $html = '<div>';
    $html .= '<ol>';
    foreach($results as $item) {
       $html .= '<li><strong><a href="';
       $html .= $baseUrl. $item-> _links-> webui;
       $html .= '" target="_blank">';
       $html .= $item->title;
       $html .= '</a></strong></li>';
    }
    $html .= '</ol></div><hr>';
    $html .= '</div>';

    $layout->content($html);
    # Change Ends
} 

$layout->content('</div>');
$layout->render();

Answer 1

您无法在UI/Main线程上执行网络或长时间运行任务，因此您需要使用AsyncTask在后台线程中执行该任务。尝试从AsyncTask中的url加载xml，然后将xml加载到UI线程中的布局中。

public class XMLParsingDOMExample extends Activity {

    LinearLayout layout;
    TextView name[];
    TextView website[];
    TextView category[];

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        layout = new LinearLayout(this);
        layout.setOrientation(LinearLayout.VERTICAL);
        loadXML("http://www.androidpeople.com/wp-content/uploads/2010/06/example.xml");
    }


    private void loadXML(final String stringUrl){
        new AsyncTask<Void,Void,Document>(){
            @Override
            protected Document doInBackground(Void... params) {
                try {
                    URL url = new URL(stringUrl);
                    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
                    DocumentBuilder db = dbf.newDocumentBuilder();
                    return db.parse(new InputSource(url.openStream()));
                }catch (Throwable e){
                    e.printStackTrace();
                }

                return null;
            }

            @Override
            protected void onPostExecute(Document document) {
                super.onPostExecute(document);
                parseXML(document);
            }
        }.execute();
    }

    private void parseXML(Document doc){

        try {
            doc.getDocumentElement().normalize();

            NodeList nodeList = doc.getElementsByTagName("item");

            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);
        }
        setContentView(layout);
    }
}

将XML解析为Android时，未显示XML输出

1 个答案: