如何从另一个xml文件动态更新xml文件？

• Z时代
• 2024-01-10
• 分类：问答

我想从另一个xml文件更新一个xml文件。我使用了一个xml文件，如下所示：

    <?xml version="1.0" encoding="utf-8"?>
   <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" android:background="#00BFFF">   
   <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">
<LinearLayout
    android:id="@+id/linearLayout1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:gravity="center" android:visibility="visible">
</LinearLayout>
<LinearLayout
    android:id="@+id/linearLayout2"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:gravity="center" android:visibility="visible">
</LinearLayout>
</LinearLayout>
</ScrollView>

如下：

      <?xml version='1.0' encoding='utf-8' standalone='yes' ?>
       <map>
      <int name="linearLayout1" value="8" />
      <int name="linearLayout2" value="0" />
      </map>

从以上两个xml文件中，我想更改属性值一。XML，如果

  <int name ="linearLayout1" value = "8"/>

从 然后我想将 文件更新为LinearLayout 然后将属性值更改为 。

回答：

这是您想要的代码

    DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
    Document doc = docBuilder.parse("/home/riddhish/developerworkspace/SplitString/src/com/updatexmlwithjava/two.xml");           
    DocumentTraversal traversal = (DocumentTraversal) doc;
    Node a = doc.getDocumentElement();
    NodeIterator iterator = traversal.createNodeIterator(a, NodeFilter.SHOW_ELEMENT, null, true);

/ /

boolean flag=false;
for (Node n = iterator.nextNode(); n != null; n = iterator.nextNode()) {
       Element e = (Element) n;                
            if ("int".equals(e.getTagName())) {
                if(e.getAttribute("name").equals("linearLayout1")){
                        if(e.getAttribute("value").equals("8"))
                            flag=true;                      
                    }                    
            } 
}

/ /

docFactory = DocumentBuilderFactory.newInstance();
docBuilder = docFactory.newDocumentBuilder();
doc = docBuilder.parse("/home/riddhish/developerworkspace/SplitString/src/com/updatexmlwithjava/one.xml");           
traversal = (DocumentTraversal) doc;
a = doc.getDocumentElement();
iterator = traversal.createNodeIterator(a, NodeFilter.SHOW_ELEMENT, null, true);            
for (Node n = iterator.nextNode(); n != null; n = iterator.nextNode()) {
      Element e = (Element) n;                
          if ("LinearLayout".equals(e.getTagName())) {
                if(e.getAttribute("android:id").equals("@+id/linearLayout1")){
                        if(flag==true){
                            System.out.println(""+e.getAttribute("android:visibility"));
                            e.setAttribute("android:visibility", "gone");
                        }                           
                }                    
          } 
}

/ /

TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new File("/home/riddhish/developerworkspace/SplitString/src/com/updatexmlwithjava/one.xml"));
iterator = traversal.createNodeIterator(a, NodeFilter.SHOW_ELEMENT, null, true);          
doc = docBuilder.newDocument();
Element rootElement = doc.createElement("ScrollView");
doc.appendChild(rootElement);
for (Node n = iterator.nextNode(); n != null; n = iterator.nextNode()) {               
        rootElement.appendChild(doc.importNode(n, true));
}
transformer.transform(source, result);

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