我想在gwt中的两个html之间进行通信

Question

I want to add a widget from one html to another html using RootPanel onlyin onemodule otherwise i need to maintain state between two html

  

这是一个html的入口点

public void onModuleLoad() {
                Button button=new Button("click me");
                button.addClickHandler((ClickHandler) this);
                RootPanel rootPanel=RootPanel.get("id_html1");
                rootPanel.add(button);
            }

这是另一个html我想在这里使用RootPane

添加这个小部件

public void onClick(ClickEvent event) {
 String url="http://localhost:9090/HelloWorld/"+"HelloWorld2.html";
                Window.open(url, "_blank", "");
                Button button=new Button("finish it!");
                //button.addClickHandler((ClickHandler) this);
                RootPanel rootPanel=RootPanel.get("id_html2");
                rootPanel.add(button);