我使用以下代码在Windows和Linux中设置托盘图标。它在Windows中运行得很好，在Linux中效果还可以。在Linux（Ubuntu）中，我将面板设置为（有点）透明，当我添加一个具有透明背景的GIF时，图标的背景会变成灰色且难看（见图片，绿色钻石“！”）...有什么办法让我添加的GIF图像“保留”其透明背景吗？
图片如下： alt text http://unarm.org/stackoverflow/panel_task.jpg 如果你想测试一下，这是我使用的图像： alt text http://unarm.org/stackoverflow/green_info.gif
图片如下： alt text http://unarm.org/stackoverflow/panel_task.jpg 如果你想测试一下，这是我使用的图像： alt text http://unarm.org/stackoverflow/green_info.gif
import java.awt.*;
import java.awt.event.*;
public class TrayFun {
static class ShowMessageListener implements ActionListener {
TrayIcon trayIcon;
String title;
String message;
TrayIcon.MessageType messageType;
ShowMessageListener(
TrayIcon trayIcon,
String title,
String message,
TrayIcon.MessageType messageType) {
this.trayIcon = trayIcon;
this.title = title;
this.message = message;
this.messageType = messageType;
}
public void actionPerformed(ActionEvent e) {
trayIcon.displayMessage(title, message, messageType);
}
}
public static void main(String args[]) {
Runnable runner = new Runnable() {
public void run() {
if (SystemTray.isSupported()) {
final SystemTray tray = SystemTray.getSystemTray();
Image image = Toolkit.getDefaultToolkit().getImage("green_info.png");
PopupMenu popup = new PopupMenu();
final TrayIcon trayIcon = new TrayIcon(image, "The Tip Text", popup);
trayIcon.setImageAutoSize(true);
MenuItem item = new MenuItem("Close");
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
tray.remove(trayIcon);
}
});
popup.add(item);
try {
tray.add(trayIcon);
} catch (AWTException e) {
System.err.println("Can't add to tray");
}
} else {
System.err.println("Tray unavailable");
}
}
};
EventQueue.invokeLater(runner);
}
}