系统托盘 displayMessage() 未显示 [英] System tray displayMessage() not showing

问题描述

所以我想要的是当我的程序运行时(它是一个系统托盘)，其中一个小的通知问题会出现在屏幕的右下角.我试过了.

So what I want is when my program runs (It's a system tray) one of those small notification problems show up at the bottom right of the screen. I tried.

trayIcon = new TrayIcon(image, "Title", popup);
trayIcon.setImageAutoSize(true);
trayIcon.displayMessage("Title", "MESSAGE HERE", TrayIcon.MessageType.ERROR) //THIS IS THE LINE THAT SHOULD SHOW THE MESSAGE

程序运行时它应该在哪里运行，这是正确的方法和正确的参数吗?

Where should it be for it to run when the program runs and is that the correct method with the correct parameters?

推荐答案

您是否阅读过 如何使用系统托盘?

不过

检查这个最小的例子:

在 tray.add(trayIcon); 之后显示您的消息.

After tray.add(trayIcon); than show your message.

import java.awt.AWTException;
import java.awt.Graphics2D;
import java.awt.SystemTray;
import java.awt.TrayIcon;
import java.awt.image.BufferedImage;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.SwingUtilities;

public class Test {

    public Test() throws Exception {
        initComponents();
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    new Test();
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        });
    }

    private void initComponents() throws Exception {
        createAndShowTray();
    }

    private void createAndShowTray() throws Exception {
        //Check the SystemTray is supported
        if (!SystemTray.isSupported()) {
            System.out.println("SystemTray is not supported");
            return;
        }

        //retieve icon form url and scale it to 32 x 32
        final TrayIcon trayIcon = new TrayIcon(resizeImage(ImageIO.read(
                new URL("http://www.optical-illusions.in/illusions/blue_rotation_optical_illusion.jpg")), BufferedImage.TYPE_INT_ARGB, 32, 32));

        //get the system tray
        final SystemTray tray = SystemTray.getSystemTray();

        try {
            tray.add(trayIcon);
        } catch (AWTException e) {
            System.out.println("TrayIcon could not be added.");
        }

        trayIcon.displayMessage("Title", "MESSAGE HERE", TrayIcon.MessageType.ERROR); //THIS IS THE LINE THAT SHOULD SHOW THE MESSAGE

    }

    private static BufferedImage resizeImage(BufferedImage originalImage, int type, int IMG_WIDTH, int IMG_HEIGHT) {
        BufferedImage resizedImage = new BufferedImage(IMG_WIDTH, IMG_HEIGHT, type);
        Graphics2D g = resizedImage.createGraphics();
        g.drawImage(originalImage, 0, 0, IMG_WIDTH, IMG_HEIGHT, null);
        g.dispose();

        return resizedImage;
    }
}

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