托盘图标在Ubuntu 16.04上不起作用 [英] Tray Icon not working on Ubuntu 16.04

问题描述

我在Ubuntu Gnome 16.04下遇到Java awt托盘图标的问题:

I ran into an Issue with Java awt tray icons under Ubuntu Gnome 16.04:

该图标显示在屏幕的左上角，并且在系统托盘中显示一个黑色正方形. MouseListener也不起作用(图标上或黑色方块上都没有).

The Icon is displayed in the top left corner of my screen and in the System Tray appears a black square. The MouseListener is also not working (neither on the icon nor on the black square).

这是我的代码:

if (SystemTray.isSupported()) {
   Image image = ImageIO.read(EyeUNIFYlocal.class.getResource("/star.png"));
   TrayIcon trayIcon = new TrayIcon(image);
   trayIcon.setImageAutoSize(true);

   trayIcon.addMouseListener(new MouseAdapter() {
      @Override
      public void mouseClicked(MouseEvent e) {
         System.out.println("Clicked");
      }
   });
   try {
      SystemTray.getSystemTray().add(trayIcon);
   } catch (AWTException ex) {
      System.err.println("Error while creating tray icon.");
   }
} else {
   System.err.println("Tray icons are not supported on this System.");
}

此代码在Windows 10上正常运行.

This code works fine on Windows 10.

提前谢谢！

推荐答案

较新的Linux发行版不存在Java系统托盘支持，这主要是由于从GtkStatusIcon到AppIndicator的更改以及GTK2/3的更改(因此，除非您安装一些其他库，否则JavaFX会出现问题.

Java System Tray support doesn't exist for newer Linux distributions, mostly because of the changes from GtkStatusIcon to AppIndicator, and GTK2/3 changes as well (so, issues with JavaFX unless you install some additional libraries).

此外，由于您提到了Gnome-Gnome喜欢将AppIndicator隐藏为通知"，因此有一个扩展名(顶部图标)，可让您将指示器恢复到屏幕顶部(而不是在屏幕左下方的隐藏抽屉中

Additionally, since you mentioned Gnome -- Gnome likes to "hide" the AppIndicator as "notifications", so there is an extension (top-icons) that lets you restore the indicators back to the top of the screen (instead of in a hidden drawer at the bottom left of the screen)

如果要显示跨平台系统任务栏图标，建议使用 SystemTray 项目.即将有一个入站3.0版本(API重写和更好的本机支持)，但是较旧的2.x版本应该可以解决您遇到的问题.

If you want to display cross-platform system tray icons, I suggest the SystemTray project. There is an inbound 3.0 release soon (an API rewrite and better native support), but the older 2.x version should solve the problem you are having.

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