blackberry - 在 BrowserField 中加载文档时如何推送新屏幕？

Question

在我的应用程序中，我有一个登录屏幕。当用户输入正确的用户名和密码时，我必须从网站收集信息并导航到主屏幕。

我尝试了以下代码。但是这段代码不起作用。如何实现？

public final class MyScreen extends MainScreen {
    public MyScreen() {
        BrowserFieldConfig myBrowserFieldConfig = new BrowserFieldConfig();
        myBrowserFieldConfig.setProperty(BrowserFieldConfig.NAVIGATION_MODE,
        BrowserFieldConfig.NAVIGATION_MODE_POINTER);
        BrowserField browserField = new BrowserField(myBrowserFieldConfig);

        BrowserFieldListener list = new BrowserFieldListener() {
            public void documentLoaded(BrowserField browserField, Document document) throws Exception {
                String url = document.getBaseURI();
                String val = "http://demo.....";
                //i am checking the correct url and i will navigate to main screen
                if (url.equals(new String(val))) {
                    UiApplication.getUiApplication().pushScreen(new Main());//here i got IllegalStateException ..
                }
                System.out.println(" Login  URL " + url);
                //super.documentLoaded(browserField, document);
            }
        };

        browserField.addListener(list);
        add(browserField);
        String URL = "http://demo.....";
        if (DeviceInfo.isSimulator()) {
            URL = URL + ";deviceSide=true";
        }
        browserField.requestContent(URL);
    }
}

Answer 1

代替

  UiApplication.getUiApplication().pushScreen(new Main());

利用

 UiApplication.getUiApplication().invokeLater(new Runnable()
                {
                    public void run() 
                    {
                        UiApplication.getUiApplication().pushScreen(new Main());
                    }
                });

你需要在ui Thread下做。核实。