Question

我想解析我从数据库软件导出的XML文件，用于我的Android应用程序。但是有些标签有这样的参数：

<row> <value column="Index" null="false">1</value> <value column="Front" null="false">INFO</value> <value column="Back" null="false">INFO</value> <value column="Check" null="false">0</value> </row>

在尝试查找开始标记以解析它时，我指定了什么字符串值？（例如：找到我将开始抽头与“行”进行比较的行，如果它返回真，我计算数据。我该怎样对每个值做什么，分别是Index，Front，Back和Check？）

我的java代码如下

   try{ 
    XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
    factory.setNamespaceAware(true);
    XmlPullParser xpp = factory.newPullParser();

    InputStream stream = context.getResources().openRawResource(com.Whydea.chemistryhelper.R.raw.appxml);
    xpp.setInput(stream, null);

    int eventType = xpp.getEventType();
    while (eventType != XmlPullParser.END_DOCUMENT){
        if(eventType==XmlPullParser.START_TAG){
            handleStartTag(xpp.getName());  //handels Start Tag
        } else if (eventType==XmlPullParser.END_TAG){
            handleEndTag(xpp.getName());
            Ctag=null;
        } else if (eventType==XmlPullParser.TEXT){
            handleText(xpp.getText());
        }
        eventType=xpp.next();
    }

    }catch (NotFoundException e){
        Log.d("XMLpp",e.getMessage());          
    }catch (XmlPullParserException e){
        Log.d("XMLpp",e.getMessage());
    }catch (IOException e){
        Log.d("XMLpp",e.getMessage());
    }

`

编辑：

每个“value”开始标记都有自己的属性（column = ...），我该如何访问它们？

例如：要访问一行，我有一个值为“row”的String常量，并检查start标记是否与之对应，并且它有效。但是当我声明一个值为“value column = \”的字符串常量时，检查\“null = \”false \“”（我必须使用\其他明智的“给出错误”），它找不到找到那个开始标记。那么什么我的常数应该是吗？

Answer 1

如果我正确理解你的问题然后获得你需要做的每个值，基本上你想获得xml标签内每个属性的值

          int attributeCount = xpp.getAttributeCount();
        for(int i = 0; i<attributeCount; i++){
            String name = xpp.getAttributeName(i);
            //Log.d(TAG, "Name: "+name);
            if(name != null && name.equalsIgnoreCase("column")){

                return Integer.parseInt(xpp.getAttributeValue(i));                
            }
        }

因此，一旦遇到该行，您就会在找到之后查找开始标记“值”，然后使用上面的代码获取属性的各个值。

根据您的评论，如果您想获取XML标记的文本值，则必须使用getText（）方法。找到START_TAG值后，执行以下代码：

                    eventType = xpp.next();
                    if(eventType == XmlPullParser.TEXT){
                        String text = xpp.getText();                              
                    }

对于xml标记'INFO'值，它将返回'INFO'

Answer 2

您是否开发了生成XML文件的应用程序？如果是这样，你为什么不改变它？如果XML具有以下格式，则解析XML要容易得多：

<item Index="1" Front="INFO" Back="INFO" Check="0"/>
<item Index="2" Front="INFO" Back="INFO" Check="1"/>

Answer 3

    try {
        final Service S = new Service();
        String xmlString = S.ImportAllPollBoothStatus(IMEI,asscd, boothno);
        if(xmlString.toLowerCase().trim().equals("false")){
            return false;
        }
        DocumentBuilderFactory docFactory = DocumentBuilderFactory
                .newInstance();
        DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
        InputSource is = new InputSource();
        is.setCharacterStream(new StringReader(xmlString));
        Document doc = docBuilder.parse(is);

        NodeList nodes = doc.getElementsByTagName("HT");

        for (int i = 0; i < nodes.getLength(); i++) {

            Element element = (Element) nodes.item(i);
            NodeList blockidnodes = doc.getElementsByTagName("Table");

            for (int blockidcount = 0; blockidcount < blockidnodes
                    .getLength(); blockidcount++) {

                NodeList PollpercentId = element
                        .getElementsByTagName("PollpercentId");
                Element line1 = (Element) PollpercentId.item(blockidcount);

                NodeList asscd1 = element
                        .getElementsByTagName("asscd");
                Element line2 = (Element) asscd1.item(blockidcount);

                NodeList pollgcd = element
                        .getElementsByTagName("pollgcd");
                Element line3 = (Element) pollgcd.item(blockidcount);


                NodeList SessionYearIdref = element
                        .getElementsByTagName("SessionYearIdref");
                Element line4 = (Element) SessionYearIdref.item(blockidcount);

                NodeList MaleVoters = element
                        .getElementsByTagName("MaleVoters");
                Element line5 = (Element) MaleVoters.item(blockidcount);

                NodeList FemaleVoters = element
                        .getElementsByTagName("FemaleVoters");
                Element line6 = (Element) FemaleVoters.item(blockidcount);

                NodeList UpdatedDate = element
                        .getElementsByTagName("UpdatedDate");
                Element line7 = (Element) UpdatedDate.item(blockidcount);

                NodeList timeslot = element
                        .getElementsByTagName("timeslot");
                Element line8 = (Element) timeslot.item(blockidcount);


            this.db.insertVotingStatus(
                        getCharacterDataFromElement(line1),
                        getCharacterDataFromElement(line2),
                        getCharacterDataFromElement(line3),
                        getCharacterDataFromElement(line4),
                        getCharacterDataFromElement(line5),
                        getCharacterDataFromElement(line6),
                        getCharacterDataFromElement(line7),
                        getCharacterDataFromElement(line8));

            }
        }


    }
     catch (Exception e) {
        Log.e("EXCEPTION DURING VIDHANSABHA INSERION",
                "======Insert-VIDHANSABHA-DETAILS=====================" + e);
        return false;
    }
    return true;

Android：解析XML数据：带参数的标签

3 个答案: