在BlackBerry sim上使用“; deviceside = true”执行browserfield时出现问题

我正在尝试使用Apress Advanced BlackBerry Development书中给出的示例代码。 问题是，当我使用MDS启​​动模拟器时，会显示网页。 但是，当我将“; deviceside = true”附加到url，然后启动没有MDS的模拟器时，不会显示网页。 仅显示白色屏幕。

import java.io.IOException; import java.util.*; import javax.microedition.io.*; import net.rim.device.api.browser.field.*; import net.rim.device.api.io.http.HttpHeaders; import net.rim.device.api.system.Application; import net.rim.device.api.ui.*; import net.rim.device.api.ui.component.LabelField; import net.rim.device.api.ui.container.*; public class BrowserScreen extends MainScreen implements Runnable, RenderingApplication { private RenderingSession renderSession; private LabelField status; private StatusUpdater updater; private String url; public BrowserScreen() { renderSession = RenderingSession.getNewInstance(); status = new LabelField("Loading..."); add(status); updater = new StatusUpdater(status); url = "http://www.google.com"; (new Thread(this)).start(); } private class BrowserFieldContainer extends VerticalFieldManager { public BrowserFieldContainer() { super(Manager.VERTICAL_SCROLL | Manager.VERTICAL_SCROLLBAR | Manager.FIELD_HCENTER); } public void sublayout(int maxWidth, int maxHeight) { int width = BrowserScreen.this.getWidth(); int height = BrowserScreen.this.getHeight(); super.sublayout((int) (width * .9), height / 2); } } public void run() { HttpConnection conn = null; try { conn = (HttpConnection) Connector.open(url); updater.sendDelayedMessage("Connection opened"); BrowserContent browserContent = renderSession.getBrowserContent( conn, this, null); if (browserContent != null) { Field field = browserContent.getDisplayableContent(); if (field != null) { synchronized (Application.getEventLock()) { deleteAll(); add(status); add(new LabelField("Your search starts here.")); BrowserFieldContainer container = new BrowserFieldContainer(); container.add(field); add(container); add(new LabelField("Don't forget to tip the service!")); } } browserContent.finishLoading(); } } catch (Exception e) { updater.sendDelayedMessage(e.getMessage()); } finally { try { if (conn != null) { conn.close(); } } catch (Exception e) { } } } public Object eventOccurred(Event event) { if (event.getUID() == Event.EVENT_URL_REQUESTED) { UrlRequestedEvent urlRequestedEvent = (UrlRequestedEvent) event; url = urlRequestedEvent.getURL(); (new Thread(this)).start(); } updater.sendDelayedMessage("Handle event " + event.getUID() + " for " + event.getSourceURL()); return null; } public int getAvailableHeight(BrowserContent browserContent) { return getHeight() / 2; } public int getAvailableWidth(BrowserContent browserContent) { return (int) (getWidth() * .9); } public String getHTTPCookie(String url) { return null; } public int getHistoryPosition(BrowserContent browserContent) { return 0; } protected HttpConnection getResourceConnection(String url, HttpHeaders requestHeaders) { HttpConnection connection = null; try { connection = (HttpConnection) Connector.open(url); if (requestHeaders != null) { Hashtable headers = requestHeaders.toHashtable(); if (headers != null) { Enumeration names = headers.keys(); while (names.hasMoreElements()) { String name = (String) names.nextElement(); String value = (String) headers.get(name); connection.setRequestProperty(name, value); } } } } catch (IOException ioe) { updater.sendDelayedMessage(ioe.getMessage()); } return connection; } public HttpConnection getResource(final RequestedResource resource, final BrowserContent referrer) { if (resource == null || resource.isCacheOnly()) { return null; } String url = resource.getUrl(); if (url == null) { return null; } if (referrer == null) { return getResourceConnection(resource.getUrl(), resource .getRequestHeaders()); } else { (new Thread() { public void run() { HttpConnection connection = getResourceConnection(resource .getUrl(), resource.getRequestHeaders()); resource.setHttpConnection(connection); referrer.resourceReady(resource); } }).start(); } return null; } public void invokeRunnable(Runnable runnable) { (new Thread(runnable)).start(); } } 

Answer 1

检查你的参数deviceSide; 你键入“ture”而不是“true”！