html 按钮代号一的处理事件

Question

为了丰富 ui，我在表单中嵌入了包含大量 html 内容（主要是 Table、按钮）的 WebBrowser 组件。是否可以在单击 html 按钮时处理事件？

Answer 1

当然，请查看厨房水槽演示以获取示例。

通常只需导航到事件中的 URL 并实现您自己的 BrowserNavigationCallback 来处理到特定 URL 的导航。

这是 Kitchen Sink 演示中的代码，请注意 setBrowserNavigationCallback 块：

    final WebBrowser wb = new WebBrowser();
    if(wb.getInternal() instanceof BrowserComponent) {
        Button btn = new Button("Add");
        final TextArea content = new TextArea();
        Container north = new Container(new BorderLayout());
        north.addComponent(BorderLayout.CENTER, content);
        north.addComponent(BorderLayout.EAST, btn);
        cnt.addComponent(BorderLayout.NORTH, north);
        content.setHint("Add to web document");
        btn.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                ((BrowserComponent)wb.getInternal()).execute("fnc('" + content.getText() + "');");
            }
        });
        ((BrowserComponent)wb.getInternal()).setBrowserNavigationCallback(new BrowserNavigationCallback() {
            public boolean shouldNavigate(String url) {
                if(url.startsWith("http://sayhello")) {
                    // warning!!! This is not on the EDT and this method MUST return immediately!
                    Display.getInstance().callSerially(new Runnable() {
                        public void run() {
                            ((BrowserComponent)wb.getInternal()).execute("fnc('this was written by Java code!')");
                        }
                    });
                    return false;
                }
                return true;
            }
        });
    }

html 按钮代号一的处理事件

Handle event for html button codename one

codenameone