如何在XML Pull Parser中获取特定的节点值

Question

我使用以下代码来解析XML，它已从官方Android文档中引用:

XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
XmlPullParser xpp = factory.newPullParser();
xpp.setInput(new StringReader(response));
int eventType = xpp.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
    if (eventType == XmlPullParser.START_DOCUMENT) {
        System.out.println("Start document");
    } else if (eventType == XmlPullParser.START_TAG) {
        System.out.println("Start tag " + xpp.getName());
    } else if (eventType == XmlPullParser.END_TAG) {
        System.out.println("End tag " + xpp.getName());
    } else if (eventType == XmlPullParser.TEXT) {
    //    System.out.println("Text " + xpp.getText());

    }
    eventType = xpp.next();
}
System.out.println("End document");

在控制台上:

06-08 11:13:25.557  24857-24883/ex.com.receipts I/System.out﹕ Start document
06-08 11:13:25.557  24857-24883/ex.com.receipts I/System.out﹕ Start tag exareceipts
06-08 11:13:25.557  24857-24883/ex.com.receipts I/System.out﹕ Start tag email
06-08 11:13:25.557  24857-24883/ex.com.receipts I/System.out﹕ End tag email
06-08 11:13:25.557  24857-24883/ex.com.receipts I/System.out﹕ Start tag authentication_status
06-08 11:13:25.557  24857-24883/ex.com.receipts I/System.out﹕ End tag authentication_status
06-08 11:13:25.557  24857-24883/ex.com.receipts I/System.out﹕ End tag exareceipts
06-08 11:13:25.557  24857-24883/ex.com.receipts I/System.out﹕ End document

然而，我只对名称为authentication_status的节点感兴趣，为此我知道我需要检查:

if(xpp.getName().equalsIgnoreCase("authentication_status")){
    //logic for getting node value
}

我真的很困惑和不确定-在哪里放置这些代码。

Answer 1

好的，方法如下:

 XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
                            factory.setNamespaceAware(true);
                            XmlPullParser xpp = factory.newPullParser();
                            String tagName = null;
                            xpp.setInput(new StringReader(response));
                            int eventType = xpp.getEventType();
                            while (eventType != XmlPullParser.END_DOCUMENT) {
                                if (eventType == XmlPullParser.START_DOCUMENT) {
                                    System.out.println("Start document");
                                } else if (eventType == XmlPullParser.START_TAG) {
                                    System.out.println("Start tag " + xpp.getName());
                                    tagName =  xpp.getName();
                                } else if (eventType == XmlPullParser.END_TAG) {
                                    System.out.println("End tag " + xpp.getName());
                                } else if (eventType == XmlPullParser.TEXT) {
                                    if(tagName.equalsIgnoreCase("authentication_status")){
                                        System.out.println("Text tagName " + xpp.getText());
                                    }


                                }
                                eventType = xpp.next();
                            }
                            System.out.println("End document");