javafx系统托盘SystemTray实现

直接调用 MySystemTray.getInstance().listen(stage);  即可

如果你关闭 aStage 打开了 bStage , 系统托盘需要重新监听bStage:   MySystemTray.getInstance().listen(bStage);

关闭窗口的时候可以调用 MySystemTray.getInstance().hide(stage);

 

简单粗暴,直接上代码:

/**
 * 自定义系统托盘(单例模式)
 */
public class MySystemTray {

    private static MySystemTray instance;
    private static MenuItem showItem;
    private static MenuItem exitItem;
    private static TrayIcon trayIcon;
    private static ActionListener showListener;
    private static ActionListener exitListener;
    private static MouseListener mouseListener;
    private Logger logger = LoggerFactory.getLogger(MySystemTray.class);

    static{
        //执行stage.close()方法,窗口不直接退出
        Platform.setImplicitExit(false);
        //菜单项(打开)中文乱码的问题是编译器的锅,如果使用IDEA,需要在Run-Edit Configuration在LoginApplication中的VM Options中添加-Dfile.encoding=GBK
        //如果使用Eclipse,需要右键Run as-选择Run Configuration,在第二栏Arguments选项中的VM Options中添加-Dfile.encoding=GBK
        showItem = new MenuItem("打开");
        //菜单项(退出)
        exitItem = new MenuItem("退出");
        //此处不能选择ico格式的图片,要使用16*16的png格式的图片
        URL url = MySystemTray.class.getResource("/static/images/my.png");
        Image image = Toolkit.getDefaultToolkit().getImage(url);
        //系统托盘图标
        trayIcon = new TrayIcon(image);
        //初始化监听事件(空)
        showListener = e -> Platform.runLater(() -> {});
        exitListener = e -> {};
        mouseListener = new MouseAdapter() {};
    }

    public static MySystemTray getInstance(){
        if(instance == null){
            instance = new MySystemTray();
        }
        return instance;
    }

    private MySystemTray(){
        try {
            //检查系统是否支持托盘
            if (!SystemTray.isSupported()) {
                //系统托盘不支持
                logger.info(Thread.currentThread().getStackTrace()[ 1 ].getClassName() + ":系统托盘不支持");
                return;
            }
            //设置图标尺寸自动适应
            trayIcon.setImageAutoSize(true);
            //系统托盘
            SystemTray tray = SystemTray.getSystemTray();
            //弹出式菜单组件
            final PopupMenu popup = new PopupMenu();
            popup.add(showItem);
            popup.add(exitItem);
            trayIcon.setPopupMenu(popup);
            //鼠标移到系统托盘,会显示提示文本
            trayIcon.setToolTip("提示文本");
            tray.add(trayIcon);
        } catch (Exception e) {
            //系统托盘添加失败
            logger.error(Thread.currentThread().getStackTrace()[ 1 ].getClassName() + ":系统添加失败", e);
        }
    }

    /**
     * 更改系统托盘所监听的Stage
     */
    public void listen(Stage stage){
        //防止报空指针异常
        if(showListener == null || exitListener == null || mouseListener == null || showItem == null || exitItem == null || trayIcon == null){
            return;
        }
        //移除原来的事件
        showItem.removeActionListener(showListener);
        exitItem.removeActionListener(exitListener);
        trayIcon.removeMouseListener(mouseListener);
        //行为事件: 点击"打开"按钮,显示窗口
        showListener = e -> Platform.runLater(() -> showStage(stage));
        //行为事件: 点击"退出"按钮, 就退出系统
        exitListener = e -> {
            System.exit(0);
        };
        //鼠标行为事件: 单机显示stage
        mouseListener = new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                //鼠标左键
                if (e.getButton() == MouseEvent.BUTTON1) {
                    showStage(stage);
                }
            }
        };
        //给菜单项添加事件
        showItem.addActionListener(showListener);
        exitItem.addActionListener(exitListener);
        //给系统托盘添加鼠标响应事件
        trayIcon.addMouseListener(mouseListener);
    }

    /**
     * 关闭窗口
     */
    public void hide(Stage stage){
        Platform.runLater(() -> {
            //如果支持系统托盘,就隐藏到托盘,不支持就直接退出
            if (SystemTray.isSupported()) {
                //stage.hide()与stage.close()等价
                stage.hide();
            } else {
                System.exit(0);
            }
        });
    }

    /**
     * 点击系统托盘,显示界面(并且显示在最前面,将最小化的状态设为false)
     */
    private void showStage(Stage stage){
        //点击系统托盘,
        Platform.runLater(() -> {
            if(stage.isIconified()){ stage.setIconified(false);}
            if(!stage.isShowing()){ stage.show(); }
            stage.toFront();
        });
    }
}