analysis using XML dom
Hi all
very new development for mobile am my doubts may be stupid to you all,.
but I need your help as am new to this platform.
My requirement is, I need to parse a xml form url DOM parser and
I need to analyze the sectionname only an xml file and display them in a
ListField.when I select one of the item listfield it must navigate
next screen and parse and xml again and list the contents of the sectionname.
class VVFApplication extends UiApplication{ MainScreen _screen= new MainScreen(); String _node,_element; Connection _connectionthread;
public static void main(String arg[]){ VVFApplication application = new VVFApplication(); application.enterEventDispatcher(); }
public VVFApplication() {
_screen.setTitle("Vishwak Video Framework"); _screen.add(new RichTextField("LOADING")); _screen.add(new SeparatorField()); pushScreen(_screen); _connectionthread = new Connection(); _connectionthread.start();}
public void updateField(String node, String element){
String title="SectionName"; _screen.add(new RichTextField("*"+element)); // _screen.add(_listElements.addElement("*"+element) ); if(node.equals(title)){ _screen.add(new SeparatorField()); } }
private class Connection extends Thread{ public Connection() { super(); }
public void run() {
Document doc; StreamConnection conn; try{ conn=(StreamConnection)Connector.open; DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory. newInstance(); DocumentBuilder docBuilder= docBuilderFactory.newDocumentBuilder(); docBuilder.isValidating(); doc = docBuilder.parse(conn.openInputStream()); doc.getDocumentElement ().normalize (); NodeList list=doc.getElementsByTagName("SectionName"); _node=new String(); _element = new String(); Object obj = Application.getEventLock(); for (int i=0;i
now, I need to have a selectable listfield, who displays the sectionname in list.and wen I select the list item, it must navigate to the next screen to display its content.
can anyone suggest me some ideas.thanks in advance
If the screen is blank, then there not all fields or fields not display anything. Show us the code for how you build the screen, how do fill you the listfield and anything else that might be relevant. More (relevant) information, it is more likely that you will receive assistance.
Did you read the documentation for ListField? In addition, RIM has several articles on listfield in the category of fields of knowledge base. There is a tutorial at http://developerlife.com/tutorials/?p=898, and a search on the web for "blackberry listfield" will many examples.
You must extract the DOM, the information that you want to view and add to the (usually an array or a vector) data structure used by a ListFieldCallback registered with the ListField. If you use the ObjectListField, it acts as its own ListFieldCallback and attracts each element as a line of text using ToString. Otherwise, you must write your own ListFieldCallback, which is pretty easy, unless you want fancy layout for each line.
Tags: BlackBerry Developers
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