how to update xml file from another xml file dynamically?

问题

I would like to update an xml file from another xml file.I have used an xml file as shown below:

one.xml

    <?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>

two.xml as follows:

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

from the above two xml files i would like to change the attribute value one. xml when if

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

from two.xml then I would like to update one.xml file as where LinearLayout android:id=\"@+id/linearLayout1\" then change the attribute value as android:visibility=\"gone\".

回答1:

Here is code what you want it's

    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);

/** * Logic for checking **/

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;                      
                    }                    
            } 
}

/** * Logic for reading one.xml and setting android:visibility="gone" **/

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");
                        }                           
                }                    
          } 
}

/** * Logic for rewriting one.xml **/

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);

来源：https://stackoverflow.com/questions/9884051/how-to-update-xml-file-from-another-xml-file-dynamically

标签

java

android

xml

updatexml