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我正在使用 LWUIT 1.5 选项卡来显示通知。我有三个Tabs，我从 php Web 服务获取通知。我成功获取了 first 的通知列表Tab。但是对于接下来的两个Tabs，我无法理解我应该写什么代码

  1. 检测第二个/第三个Tab被点击。我知道如何添加commandListener到Button. 有什么commandListener可供Tab选择的？

  2. Tab从服务器接收到新数据时如何刷新内容？

    私人无效showNotificationList（）{

    try {

    Form f = new Form("Notifications");
    f.setScrollable(false);
    f.setLayout(new BorderLayout());
    final List list = new List(getNotifications()); //gets hashtables - notices
    list.setRenderer(new GenericListCellRenderer(createGenericRendererContainer(), createGenericRendererContainer()));
    list.setSmoothScrolling(true);
    //System.out.println("adding list component to listview");
    list.addActionListener(new ActionListener() {

        public void actionPerformed(ActionEvent evt) {
            int i = list.getSelectedIndex();
            noticeDetailsForm(notices[i]);
            //Dialog. show( "title",  notices[i].toString(),  "ok",  "exitt");
        }
    });
    //Container c2 = new Container(new BoxLayout(BoxLayout.Y_AXIS));
    //c2.addComponent(list);
    Tabs tabs = new Tabs(Tabs.TOP);
    tabs.addTab("Recent", list);
    tabs.addTab("Urgent", new Label("urgent goes here"));
    tabs.addTab("Favourites", new Label("favs goes here"));

    //f.addComponent(tabs);
    f.addComponent(BorderLayout.CENTER, tabs);
    Command backComm = new Command("Back") {

        public void actionPerformed(ActionEvent ev) {
            Dashboard.dbInstance.setUpDashboard();

        }
    };
    f.addCommand(backComm);
    //System.out.println("showing lsit form");
    f.show();
} catch (Exception ex) {
    ex.printStackTrace();
}

    }

    private Container createGenericRendererContainer() throws IOException { //System.out.println("container called");

//System.out.println("container called");
Container c = new Container(new BorderLayout());
c.setUIID("ListRenderer");

Label xname = new Label("");
Label description = new Label();
Label focus = new Label("");
Container cnt = new Container(new BoxLayout(BoxLayout.Y_AXIS));
xname.setName("Name");
xname.getStyle().setBgTransparency(0);
xname.getStyle().setFont(Font.createSystemFont(Font.FACE_SYSTEM, Font.STYLE_BOLD, Font.SIZE_MEDIUM));
//description.setFocusable(true);
description.setName("Description");
cnt.addComponent(xname);
cnt.addComponent(description);
c.addComponent(BorderLayout.CENTER, cnt);
Button thumb = new Button(Image.createImage("/res/home-work.png"));
//Image img = Image.createImage("/res/home-work.png");
c.addComponent(BorderLayout.WEST, thumb);

return c;

    }

    private Hashtable[] getNotifications() { int total = notices.length; //System.out.println(total); 哈希表 [] 数据 = 新哈希表 [总计]; //Hashtable[] data = new Hashtable[5]; /数据[0] = 新哈希表（）；data[0].put("姓名", "Shai"); data[0].put("姓氏", "Almog"); data[0].put("选中", Boolean.TRUE); /

    for (int i = 0; i < total; i++) {
    data[i] = new Hashtable();
    //System.out.println(notices[i].getName());
    data[i].put("Name", notices[i].getName());
    data[i].put("Description", notices[i].getDescription());
    data[i].put("Id", Integer.toString(notices[i].getId()));
}

return data;

    }

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1 回答 1

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1）我遇到了同样的问题，我通过覆盖not the来解决它Keyreleased， 并且在其中我检查关注的组件，如果它是get "tab.selectedIndex" 来检测我所在的位置并加载适当的数据。这是示例代码（这在我扩展 Form 的派生表单中）FormTabTabTab

**

public void keyReleased(int keyCode) {
        Component p=this.getFocused();
       String str= p.getClass().getName();
    if(str.toLowerCase().indexOf("radiobutton")!=-1){    // Radiobutton because when u 
  Here do tab specific work                              focus on the 
                                                         tab it returns radiobutton.                                    
                                                         lwuit understands tabs as list   
                                                         of radiobuttons 
                      }**

2）关于刷新数据我做了一个解决方案，但我不知道它是否正确我得到新数据，创建新数据List并删除旧数据并附加新数据然后调用Form.repaint()；

于 2012-03-11T11:02:57.913 回答