Java Development

[arunbiet]

I have an App where i am displaying contents in the screen from an XML.Now my requiremnt is that when onClicking a field it should parse another XML and repaint the same screen with new contents instead of pushing to another Screen.How to achive this?Kindly help

[simon_hain]

the same way you loaded the parsed data from the first xml.

[arunbiet]

Ya that is fine,but how to invalidate the screen,i mean the view should load in the same Screen instead of pushing to another screen.I tried

Manager manager= getMainManager();
manager.deleteAll(); 

in the constructor and than calling the same constructor with new xml,but nothing happens

[arunbiet]

UiApplication.getUiApplication()
							.invokeLater(
									new Runnable() {
										public void run() {
											new MyMainScreen(link);
											//UiApplication.getUiApplication().pushScreen(new DescriptionScreen(link));
											//processXml(link);
										
											
										}
									});

 Calling this in my OnNavigation of LabelField and my contructor looks like dis

public MyMainScreen(String id) {
		super(VERTICAL_SCROLL);
		// int directions =
		// net.rim.device.api.system.Display.ORIENTATION_PORTRAIT;
		// net.rim.device.api.ui.Ui.getUiEngineInstance().setAcceptableDirections(directions);
		Manager manager= getMainManager();
		manager.deleteAll();
		processXml(id);
}

[simon_hain]

don't process xml on the event thread
http://supportforums.blackberry.com/t5/Java-Development/What-is-the-Event-Thread/ta-p/446865

check the xml sample for some ideas.

[arunbiet]

Ok but what about reloading the screen with new contents,do i have to use deleteAll() on my manager?

[simon_hain]

if you use setText on a textfield or something similar it is automatically invalidated.
basically it depends on your implementation.

[arunbiet]

No sir,actually i have a Screen where i am adding images text in Vertical and Horizontal managers and adding those managers into the screen.So i want that i need to delete all those managers and fields and also variable values as i am using static variables at multiple places

[simon_hain]

if you cannot re-use the components (by setting new images/text) you have to delete and re-add them, yes.

[arunbiet]

So will it be sufficient if i do 

Manager manager= getMainManager();
		manager.deleteAll();

 in the constructor before parsing the new xml and adding the contents to the screen