XmlPullParser可以解析输入流和字符串: 这是待解析的文件.

<?xml version="1.0"?>
-<update> 
	<version>2</version> 
	<name>aiduke_Wandoujia_debug_v2_2016-07-19</name> 
 </update>

public static void parseXMLString(String XMLString){
        if (TextUtils.isEmpty(XMLString)){
            throw new NullPointerException();
        }
        XmlPullParser parser = Xml.newPullParser();
        try {
            parser.setInput(new StringReader(XMLString));
            int event = parser.getEventType();
            while(event != XmlPullParser.END_DOCUMENT){
                String nodeName = parser.getName();
                switch (event){
                    case XmlPullParser.START_DOCUMENT:
                        break;
                    case XmlPullParser.START_TAG:
                        if ("version".equals(nodeName)){
                            //版本号
                            long version = Long.valueOf(parser.nextText());
                        }else if("name".equals(nodeName)){
                            //apk下载地址
                            String name = parser.nextText();
                        }
                        break;
                    case XmlPullParser.END_DOCUMENT:
                        break;
                }
            }
        } catch (XmlPullParserException e) {
            e.printStackTrace();
        } catch (IOException e){
            e.printStackTrace();
        }
    }

解析输入流,我们在项目里可以配合Okhttp来获取输入流进行解析:

public static void parseXMLString(InputStream is){
        XmlPullParser parser = Xml.newPullParser();
        try {
            parser.setInput(is,null);//可以制定编码格式,可以制定为null
            int event = parser.getEventType();
            while(event != XmlPullParser.END_DOCUMENT){
                switch (event){
                    case XmlPullParser.START_DOCUMENT:
                        break;
                    case XmlPullParser.START_TAG:
                        String nodeName = parser.getName();
                        if ("version".equals(nodeName)){
                            //版本号
                            long version = Long.valueOf(parser.nextText());
                        }else if("name".equals(nodeName)){
                            //apk下载地址
                            String name = parser.nextText();
                        }
                        break;
                    case XmlPullParser.END_DOCUMENT:
                        break;
                }
                event = parser.next();
            }
        } catch (XmlPullParserException e) {
            e.printStackTrace();
        } catch (IOException e){
            e.printStackTrace();
        }

    }