如何解析xml中的字符串。安卓

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(inputStream);

// 获取根节点
Element rootElement = document.getDocumentElement();

// 获取子节点
NodeList nodeList = rootElement.getElementsByTagName("tag");
for (int i = 0; i < nodeList.getLength(); i++) {
    Node node = nodeList.item(i);
    if (node.getNodeType() == Node.ELEMENT_NODE) {
        Element element = (Element) node;
        // 解析节点内容
        String value = element.getTextContent();
    }
}

SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
DefaultHandler handler = new DefaultHandler() {
    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        // 处理节点开始事件
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        // 处理节点结束事件
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        // 处理节点内容
        String value = new String(ch, start, length);
    }
};
parser.parse(inputStream, handler);

XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
XmlPullParser parser = factory.newPullParser();
parser.setInput(inputStream, "UTF-8");

int eventType = parser.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
    switch (eventType) {
        case XmlPullParser.START_TAG:
            // 处理节点开始事件
            String tagName = parser.getName();
            if ("tag".equals(tagName)) {
                // 解析节点内容
                String value = parser.nextText();
            }
            break;
        case XmlPullParser.END_TAG:
            // 处理节点结束事件
            break;
    }
    eventType = parser.next();
}