lwuit - lwuit httprequesthandler 抛出 java.lang.Error：静态初始化程序：java/lang/NullPointerException

Question

我在 LWUIT 浏览器示例中使用 HttpRequestHandler。当我初始化 HttpRequestHandler 时，我得到 java.lang.Error: Static initializer: java.lang.NullPointerException。这是我在 startApp 中的代码。公共无效startApp（）{

Display.init(this);

try {
    InputStream imageStream= Home.class.getResourceAsStream("tipster.res");
    //String filesPathAndName = url.getPath();        
      Resources r = Resources.open(imageStream);
      UIManager.getInstance().setThemeProps(r.getTheme("Theme 2"));
    } catch (IOException ioe) {
        ioe.printStackTrace();
      // Do something here.
    }

 HttpRequestHandler handler = new HttpRequestHandler();
    HTMLComponent h = new HTMLComponent(handler);
    h.setPage("http://m.google.com");
    ffForm.addComponent(h);

}

Answer 1

您必须先调用网络管理器的 start() 才能执行网络操作。

   NetworkManager.getInstance().start();
        Storage.init("LWUITtester");