привет, это довольно простая задача
Следующая ссылка перенаправит вас, как реализовать Пожалуйста, подождите экран
http://supportforums.blackberry.com/t5/Java-Development/Sample-quot-Please-Wait-quot-screen-part-1/ta-p/493808
скачать этот ZIP-файл
Затем добавьте небольшую логику в ваше приложение, перенесите всю вашу концепцию синтаксического анализа в поток
например, я беру демонстрационный пример парсера xml и буду конвертировать в соответствии с нашим требованием
private class Connection extends Thread{
Vector nodes_vect=new Vector();
Vector elements_vect=new Vector();
public Connection(){
super();
}
public void run(){
// define variables later used for parsing
Document doc;
StreamConnection conn;
try{
//providing the location of the XML file,
//your address might be different
conn=(StreamConnection)Connector.open
("http://localhost:8000/content/test.xml;deviceside=true");// http://localhost:8000/content/test.xml
//next few lines creates variables to open a
//stream, parse it, collect XML data and
//extract the data which is required.
//In this case they are elements,
//node and the values of an element
DocumentBuilderFactory docBuilderFactory
= DocumentBuilderFactory. newInstance();
DocumentBuilder docBuilder
= docBuilderFactory.newDocumentBuilder();
docBuilder.isValidating();
doc = docBuilder.parse(conn.openInputStream());
doc.getDocumentElement ().normalize ();
NodeList list=doc.getElementsByTagName("*");
_node=new String();
_element = new String();
//this "for" loop is used to parse through the
//XML document and extract all elements and their
//value, so they can be displayed on the device
for (int i=0;i<list.getLength();i++){
Node value=list.item(i).
getChildNodes().item(0);
_node=list.item(i).getNodeName();
_element=value.getNodeValue();
nodes_vect.addElement(_node);
elements_vect.addElement(_element);
if(i==list.getLength()-1){
pushingToNextScreen(nodes_vect, elements_vect);//after last element it will
}
}//end for
}//end try
//will catch any exception thrown by the XML parser
catch (Exception e){
System.out.println(e.toString());
}
}//end connection function
}// end connection class
}//end XML_Parsing_Sample
Вы можете позвонить из любого места
import java.util.Vector;
import javax.microedition.io.*;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.system.*;
import net.rim.device.api.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.*;
class XML_Parsing_Sample extends UiApplication{
//creating a member variable for the MainScreen
MainScreen _screen= new MainScreen();
//string variables to store the values of the XML document
String _node,_element;
Connection _connectionthread;
public static void main(String arg[]){
XML_Parsing_Sample application = new XML_Parsing_Sample();
//create a new instance of the application
//and start the application on the event thread
application.enterEventDispatcher();
}
public XML_Parsing_Sample() {
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
UiApplication.getUiApplication().pushScreen(new LoadingScreen());
}
});
// pushScreen(_screen); // creating a screen
//creating a connection thread to run in the background
_connectionthread = new Connection();
_connectionthread.start();//starting the thread operation
}
public void pushingToNextScreen(final Vector node,final Vector elem){
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
UiApplication.getUiApplication().popScreen(UiApplication.getUiApplication().getActiveScreen());
UiApplication.getUiApplication().pushScreen(new datascreen(node, elem));//after last element it will call mainscreen constructer
}
});
}
class datascreen extends MainScreen
{
public datascreen(Vector node,Vector elem) {
//you can write your logic and design with data(vectors contain all data)
}
}