Question

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出现在屏幕的右下角。我试过了。

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

程序运行时应该在哪里运行，并且正确的方法是正确的参数？

Answer 1

您是否阅读了How to Use the System Tray？

然而

检查这个最小的例子：

tray.add(trayIcon);后显示您的消息。

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;
    }
}

Answer 2

转到小操作中心，然后单击“管理通知” 然后向下滚动设置，直到找到

enter image description here

当我将其放入一个循环中时它不起作用，所以我只是尝试在循环之外放置一条附加语句，然后它起作用了。是的！

系统托盘displayMessage（）未显示

2 个答案: