问题
I'd created a JFrame and want to hide in taskbar (in windows not visible right in the bottom but hidden in the tray menu items).
Can anybody tell me how to do that?
Did I need to make some changes in System settings of windows?
for example, you might have seen some download managers, team viewer, 4shared desktop, etc. are hide in taskbar's tray menu items.
回答1:
import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;
import javax.swing.UIManager;
/**
*
* @author Mohammad Faisal
* ermohammadfaisal.blogspot.com
* facebook.com/m.faisal6621
*
*/
public class HideToSystemTray extends JFrame{
TrayIcon trayIcon;
SystemTray tray;
HideToSystemTray(){
super("SystemTray test");
System.out.println("creating instance");
try{
System.out.println("setting look and feel");
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(Exception e){
System.out.println("Unable to set LookAndFeel");
}
if(SystemTray.isSupported()){
System.out.println("system tray supported");
tray=SystemTray.getSystemTray();
Image image=Toolkit.getDefaultToolkit().getImage("/media/faisal/DukeImg/Duke256.png");
ActionListener exitListener=new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Exiting....");
System.exit(0);
}
};
PopupMenu popup=new PopupMenu();
MenuItem defaultItem=new MenuItem("Exit");
defaultItem.addActionListener(exitListener);
popup.add(defaultItem);
defaultItem=new MenuItem("Open");
defaultItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
setVisible(true);
setExtendedState(JFrame.NORMAL);
}
});
popup.add(defaultItem);
trayIcon=new TrayIcon(image, "SystemTray Demo", popup);
trayIcon.setImageAutoSize(true);
}else{
System.out.println("system tray not supported");
}
addWindowStateListener(new WindowStateListener() {
public void windowStateChanged(WindowEvent e) {
if(e.getNewState()==ICONIFIED){
try {
tray.add(trayIcon);
setVisible(false);
System.out.println("added to SystemTray");
} catch (AWTException ex) {
System.out.println("unable to add to tray");
}
}
if(e.getNewState()==7){
try{
tray.add(trayIcon);
setVisible(false);
System.out.println("added to SystemTray");
}catch(AWTException ex){
System.out.println("unable to add to system tray");
}
}
if(e.getNewState()==MAXIMIZED_BOTH){
tray.remove(trayIcon);
setVisible(true);
System.out.println("Tray icon removed");
}
if(e.getNewState()==NORMAL){
tray.remove(trayIcon);
setVisible(true);
System.out.println("Tray icon removed");
}
}
});
setIconImage(Toolkit.getDefaultToolkit().getImage("Duke256.png"));
setVisible(true);
setSize(300, 200);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args){
new HideToSystemTray();
}
}
This is the working program!
回答2:
myFrame#getExtendedState and myFrame#setExtendedState
basically is better to multiplay these ExtendedStates
frame.setExtendedState(JFrame.ICONIFIED);
frame.setExtendedState(frame.getExtendedState() | JFrame.ICONIFIED);
frame.setExtendedState(JFrame.NORMAL);
frame.setExtendedState(frame.getExtendedState() & (~JFrame.ICONIFIED));
EDIT 1.
for example
import java.awt.event.ActionEvent;
import javax.swing.*;
public class WindowGCDemo1 {
private javax.swing.Timer timer = null;
private int count = 0;
private JFrame myFrame = new JFrame();
public WindowGCDemo1() {
myFrame = new JFrame();
myFrame.setLocation(150, 150);
myFrame.setSize(200, 400);
myFrame.setVisible(true);
System.out.println(myFrame.getExtendedState());
start();
}
private void start() {
timer = new javax.swing.Timer(1000, updateCol());
timer.start();
}
public Action updateCol() {
return new AbstractAction("Set Delay") {
private static final long serialVersionUID = 1L;
@Override
public void actionPerformed(ActionEvent e) {
timer.stop();
myFrame.setExtendedState(JFrame.ICONIFIED);
System.out.println(myFrame.getExtendedState());
count++;
startAgain();
}
};
}
private void startAgain() {
timer = new javax.swing.Timer(1000, updateColAgain());
timer.start();
}
public Action updateColAgain() {
return new AbstractAction("Set Delay") {
private static final long serialVersionUID = 1L;
@Override
public void actionPerformed(ActionEvent e) {
timer.stop();
myFrame.setExtendedState(JFrame.NORMAL);
System.out.println(myFrame.getExtendedState());
count++;
if (count > 5) {
timer.stop();
stop();
}
start();
}
};
}
private void stop() {
System.out.println("--------------------------------------------");
System.out.println("System Exit");
System.exit(0);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
WindowGCDemo1 windowGCDemo = new WindowGCDemo1();
}
});
}
}
EDIT 2.
for SystemTry you have to set for your JFrame#setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE); and in the proper JMenuItem(s) from JPopupMenu, just JFrame#setVisible(true);
回答3:
Check the TryIconDemo from Documentation. This Link contain a small piece of code. Copy and Run it on your IDE.
https://docs.oracle.com/javase/tutorial/displayCode.html?code=https://docs.oracle.com/javase/tutorial/uiswing/examples/misc/TrayIconDemoProject/src/misc/TrayIconDemo.java
/*
* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle or the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package misc;
/*
* TrayIconDemo.java
*/
import java.awt.*;
import java.awt.event.*;
import java.net.URL;
import javax.swing.*;
public class TrayIconDemo {
public static void main(String[] args) {
/* Use an appropriate Look and Feel */
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
//UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
} catch (UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
} catch (IllegalAccessException ex) {
ex.printStackTrace();
} catch (InstantiationException ex) {
ex.printStackTrace();
} catch (ClassNotFoundException ex) {
ex.printStackTrace();
}
/* Turn off metal's use of bold fonts */
UIManager.put("swing.boldMetal", Boolean.FALSE);
//Schedule a job for the event-dispatching thread:
//adding TrayIcon.
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
private static void createAndShowGUI() {
//Check the SystemTray support
if (!SystemTray.isSupported()) {
System.out.println("SystemTray is not supported");
return;
}
final PopupMenu popup = new PopupMenu();
final TrayIcon trayIcon =
new TrayIcon(createImage("images/bulb.gif", "tray icon"));
final SystemTray tray = SystemTray.getSystemTray();
// Create a popup menu components
MenuItem aboutItem = new MenuItem("About");
CheckboxMenuItem cb1 = new CheckboxMenuItem("Set auto size");
CheckboxMenuItem cb2 = new CheckboxMenuItem("Set tooltip");
Menu displayMenu = new Menu("Display");
MenuItem errorItem = new MenuItem("Error");
MenuItem warningItem = new MenuItem("Warning");
MenuItem infoItem = new MenuItem("Info");
MenuItem noneItem = new MenuItem("None");
MenuItem exitItem = new MenuItem("Exit");
//Add components to popup menu
popup.add(aboutItem);
popup.addSeparator();
popup.add(cb1);
popup.add(cb2);
popup.addSeparator();
popup.add(displayMenu);
displayMenu.add(errorItem);
displayMenu.add(warningItem);
displayMenu.add(infoItem);
displayMenu.add(noneItem);
popup.add(exitItem);
trayIcon.setPopupMenu(popup);
try {
tray.add(trayIcon);
} catch (AWTException e) {
System.out.println("TrayIcon could not be added.");
return;
}
trayIcon.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null,
"This dialog box is run from System Tray");
}
});
aboutItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null,
"This dialog box is run from the About menu item");
}
});
cb1.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
int cb1Id = e.getStateChange();
if (cb1Id == ItemEvent.SELECTED){
trayIcon.setImageAutoSize(true);
} else {
trayIcon.setImageAutoSize(false);
}
}
});
cb2.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
int cb2Id = e.getStateChange();
if (cb2Id == ItemEvent.SELECTED){
trayIcon.setToolTip("Sun TrayIcon");
} else {
trayIcon.setToolTip(null);
}
}
});
ActionListener listener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
MenuItem item = (MenuItem)e.getSource();
//TrayIcon.MessageType type = null;
System.out.println(item.getLabel());
if ("Error".equals(item.getLabel())) {
//type = TrayIcon.MessageType.ERROR;
trayIcon.displayMessage("Sun TrayIcon Demo",
"This is an error message", TrayIcon.MessageType.ERROR);
} else if ("Warning".equals(item.getLabel())) {
//type = TrayIcon.MessageType.WARNING;
trayIcon.displayMessage("Sun TrayIcon Demo",
"This is a warning message", TrayIcon.MessageType.WARNING);
} else if ("Info".equals(item.getLabel())) {
//type = TrayIcon.MessageType.INFO;
trayIcon.displayMessage("Sun TrayIcon Demo",
"This is an info message", TrayIcon.MessageType.INFO);
} else if ("None".equals(item.getLabel())) {
//type = TrayIcon.MessageType.NONE;
trayIcon.displayMessage("Sun TrayIcon Demo",
"This is an ordinary message", TrayIcon.MessageType.NONE);
}
}
};
errorItem.addActionListener(listener);
warningItem.addActionListener(listener);
infoItem.addActionListener(listener);
noneItem.addActionListener(listener);
exitItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
tray.remove(trayIcon);
System.exit(0);
}
});
}
//Obtain the image URL
protected static Image createImage(String path, String description) {
URL imageURL = TrayIconDemo.class.getResource(path);
if (imageURL == null) {
System.err.println("Resource not found: " + path);
return null;
} else {
return (new ImageIcon(imageURL, description)).getImage();
}
}
}
来源：https://stackoverflow.com/questions/7461477/how-to-hide-a-jframe-in-system-tray-of-taskbar