仅从 XML DOM 解析器 android 获取唯一值

Question

只想从我在微调器中获取的 XML 中获取唯一值....我能够在微调器中获取值，但所有重复值也显示在微调器下拉列表中。

例如我的xml是

<a:AAAA>
<a:Q>123</a:Q>
<a:W>yessssssss</a:W>   <--- THIS VALUE IS SAME 
<a:E>275</a:E>                   ^
<a:R>wwwwqwq</a:R>               |
</a:AAAA>
             So want only single value in andrid spinner how to achive this?                                                               
<a:AAAA>                         |
<a:Q>456</a:Q>                   v
<a:W>yessssssss</a:W>   <--- AND THIS VALUE IS SAME 
<a:E>648</a:E>
<a:R>qwqwqsd</a:R>
</a:AAAA> 

<a:AAAA>
<a:Q>789</a:Q>
<a:W>Hiiii</a:W>
<a:E>269</a:E>
<a:R>ds</a:R>
</a:AAAA>

<a:AAAA>
<a:Q>867</a:Q>
<a:W>qwqwqw</a:W>
<a:E>1648</a:E>
<a:R>wqw</a:R>
</a:AAAA>

以下代码显示微调器中的值，但数据重复

    public void onNothingSelected(AdapterView<?> arg0) {
    }

    protected void parse() {
        // TODO Auto-generated method stub


        try {

            URL url = new URL(
                    "web");
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = dbf.newDocumentBuilder();
            Document doc = db.parse(new InputSource(url.openStream()));
            doc.getDocumentElement().normalize();

            NodeList nodeList = doc.getElementsByTagName("a:AAAA");
            for (int i = 0; i < nodeList.getLength(); i++) {

                Node node = nodeList.item(i);       

                Element fstElmnt = (Element) node;
                NodeList nameList = fstElmnt.getElementsByTagName("a:Q");
                Element nameElement = (Element) nameList.item(0);
                nameList = nameElement.getChildNodes();         


                NodeList websiteList = fstElmnt.getElementsByTagName("a:W");
                Element websiteElement = (Element) websiteList.item(0);
                websiteList = websiteElement.getChildNodes();

                NodeList websiteList1 = fstElmnt.getElementsByTagName("a:E");
                Element websiteElement1 = (Element) websiteList1.item(0);
                websiteList1 = websiteElement1.getChildNodes();

                NodeList websiteList2 = fstElmnt.getElementsByTagName("a:R");
                Element websiteElement2 = (Element) websiteList2.item(0);
                websiteList2 = websiteElement2.getChildNodes();


                title.add(((Node) nameList.item(0)).getNodeValue()+":"+((Node) websiteList.item(0)).getNodeValue() +"\n"+((Node) websiteList1.item(0)).getNodeValue()+"-"+((Node) websiteList2.item(0)).getNodeValue());

            }

已编辑-

    public void onNothingSelected(AdapterView<?> arg0) {
    }

    protected void parse() {
        // TODO Auto-generated method stub


        try {

            URL url = new URL(
                    "web");
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = dbf.newDocumentBuilder();
            Document doc = db.parse(new InputSource(url.openStream()));
            doc.getDocumentElement().normalize();

            NodeList nodeList = doc.getElementsByTagName("a:AAAA");
            for (int i = 0; i < nodeList.getLength(); i++) {

                Node node = nodeList.item(i);       

                Element fstElmnt = (Element) node;
                NodeList nameList = fstElmnt.getElementsByTagName("a:Q");
                Element nameElement = (Element) nameList.item(0);
                nameList = nameElement.getChildNodes();         


                NodeList websiteList = fstElmnt.getElementsByTagName("a:W");
                Element websiteElement = (Element) websiteList.item(0);
                websiteList = websiteElement.getChildNodes();

                NodeList websiteList1 = fstElmnt.getElementsByTagName("a:E");
                Element websiteElement1 = (Element) websiteList1.item(0);
                websiteList1 = websiteElement1.getChildNodes();

                NodeList websiteList2 = fstElmnt.getElementsByTagName("a:R");
                Element websiteElement2 = (Element) websiteList2.item(0);
                websiteList2 = websiteElement2.getChildNodes();


                title.add(((Node) nameList.item(0)).getNodeValue()+":"+((Node) websiteList.item(0)).getNodeValue() +"\n"+((Node) websiteList1.item(0)).getNodeValue()+"-"+((Node) websiteList2.item(0)).getNodeValue());
                Set<String> uniqueTitles = new HashSet<String>(title);
                title3 = new ArrayList<String>(uniqueTitles);
            }

Answer 1

您可以将数据集合转换为集合。这将删除重复的项目。完成此转换后，您可以将其转换回列表并在应用程序中使用。

因此，如果您使用title 列表来存储微调器项目，您可以这样做

Set<String> uniqueTitles = new HashSet<String>(title);
title = new ArrayList<String>(uniqueTitles)'