java - Javaでメディアキーを押すことをエミュレートする方法は?

Question

Javaでメディアキーを押すことをエミュレートするにはどうすればよいですか? 再生/一時停止、次/前、音量調節など。

C# にはVK_MEDIA_PLAY_PAUSEなどVK_MEDIA_NEXT_TRACKがあります。

Java にはRobotキーを操作するためのクラスがありますが、メディア キーはありません。

Answer 1

独自のキーリスナーとスパイを作成して、この値を使用します。簡単な KeySpy クラスは次のとおりです。

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JFrame;
import javax.swing.JLabel;


public class KeySpy {
    JLabel label=new JLabel("Enter the key");
    public KeySpy() {
        JFrame frame=new JFrame("KeySpy");
        frame.add(label);

        frame.addKeyListener(new KeyListener() {

            @Override
            public void keyTyped(KeyEvent e) {
            }

            @Override
            public void keyReleased(KeyEvent e) {
            }

            @Override
            public void keyPressed(KeyEvent e) {
                label.setText(e.toString());
                System.out.println(e.toString());
            }
        });

        frame.setSize(200, 200);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        new KeySpy();

    }

}

これが私のキーボードの2つのボタンの結果です

   [Stop] = java.awt.event.KeyEvent[KEY_PRESSED,keyCode=0,keyText=Unknown keyCode: 0x0,keyChar=Undefined keyChar,keyLocation=KEY_LOCATION_STANDARD,rawCode=178,primaryLevelUnicode=0,scancode=36,extendedKeyCode=0x0] on frame0

   [Mute] = java.awt.event.KeyEvent[KEY_PRESSED,keyCode=0,keyText=Unknown keyCode: 0x0,keyChar=Undefined keyChar,keyLocation=KEY_LOCATION_STANDARD,rawCode=173,primaryLevelUnicode=0,scancode=32,extendedKeyCode=0x0] on frame0

ご覧のとおり、keyCode はありませんが、rawCode はありますので、それを使用してください。

Answer 2

Alex の KeySpy アプリケーションを改善しました。JFrame はフォーカスを保持するため、アプリケーションを最小化または最大化でき、アプリケーションがフォーカスされているときに任意のキーを押すことができます。

ここにGUIがあります。

情報をラベル/値グリッドに配置して、関心のある値を簡単に見つけられるようにします。

そして、これがコードです。これは GridBagLayout の良い例です。

package com.ggl.testing;

import java.awt.Component;
import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;

public class KeySpy implements Runnable {

    private KeySpyPanel keySpyPanel;

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new KeySpy());
    }

    @Override
    public void run() {
        final JFrame frame = new JFrame("Key Spy");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationByPlatform(true);
        frame.addWindowFocusListener(new WindowAdapter() {
            public void windowGainedFocus(WindowEvent e) {
                frame.requestFocusInWindow();
            }
        });

        keySpyPanel = new KeySpyPanel();
        frame.add(keySpyPanel.getPanel());
        frame.addKeyListener(new KeyPressedListener(this));

        frame.pack();
        frame.setVisible(true);
    }

    public KeySpyPanel getKeySpyPanel() {
        return keySpyPanel;
    }

    public class KeySpyPanel {

        private final Insets bottomInsets = new Insets(10, 10, 10, 10);
        private final Insets normalInsets = new Insets(10, 10, 0, 10);

        private JPanel panel;

        private JTextField keyCodeField;
        private JTextField keyTextField;
        private JTextField keyCharField;
        private JTextField keyLocationField;
        private JTextField modifiersField;
        private JTextField extModifiersField;
        private JTextField rawCodeField;
        private JTextField primaryLevelUnicodeField;
        private JTextField scancodeField;
        private JTextField extendedKeyCodeField;

        public KeySpyPanel() {
            createPartControl();
        }

        private void createPartControl() {
            panel = new JPanel();
            panel.setLayout(new GridBagLayout());

            int gridy = 0;

            JLabel anyKeyLabel = new JLabel("Press any key");
            anyKeyLabel.setFont(anyKeyLabel.getFont().deriveFont(36F));
            anyKeyLabel.setHorizontalAlignment(JLabel.CENTER);
            addComponent(panel, anyKeyLabel, 0, gridy++, 2, 1, normalInsets,
                    GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);

            JLabel keyCodeLabel = new JLabel("KeyCode:");
            addComponent(panel, keyCodeLabel, 0, gridy, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            keyCodeField = new JTextField(20);
            keyCodeField.setEditable(false);
            addComponent(panel, keyCodeField, 1, gridy++, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            JLabel keyTextLabel = new JLabel("KeyText:");
            addComponent(panel, keyTextLabel, 0, gridy, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            keyTextField = new JTextField(20);
            keyTextField.setEditable(false);
            addComponent(panel, keyTextField, 1, gridy++, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            JLabel keyCharLabel = new JLabel("KeyChar:");
            addComponent(panel, keyCharLabel, 0, gridy, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            keyCharField = new JTextField(20);
            keyCharField.setEditable(false);
            addComponent(panel, keyCharField, 1, gridy++, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            JLabel keyLocationLabel = new JLabel("KeyLocation:");
            addComponent(panel, keyLocationLabel, 0, gridy, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            keyLocationField = new JTextField(20);
            keyLocationField.setEditable(false);
            addComponent(panel, keyLocationField, 1, gridy++, 1, 1,
                    normalInsets, GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            JLabel modifiersLabel = new JLabel("Modifiers:");
            addComponent(panel, modifiersLabel, 0, gridy, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            modifiersField = new JTextField(20);
            modifiersField.setEditable(false);
            addComponent(panel, modifiersField, 1, gridy++, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            JLabel extModifiersLabel = new JLabel("ExtModifiers:");
            addComponent(panel, extModifiersLabel, 0, gridy, 1, 1,
                    normalInsets, GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            extModifiersField = new JTextField(20);
            extModifiersField.setEditable(false);
            addComponent(panel, extModifiersField, 1, gridy++, 1, 1,
                    normalInsets, GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            JLabel rawCodeLabel = new JLabel("RawCode:");
            addComponent(panel, rawCodeLabel, 0, gridy, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            rawCodeField = new JTextField(20);
            rawCodeField.setEditable(false);
            addComponent(panel, rawCodeField, 1, gridy++, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            JLabel primaryLevelUnicodeLabel = new JLabel("PrimaryLevelUnicode:");
            addComponent(panel, primaryLevelUnicodeLabel, 0, gridy, 1, 1,
                    normalInsets, GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            primaryLevelUnicodeField = new JTextField(20);
            primaryLevelUnicodeField.setEditable(false);
            addComponent(panel, primaryLevelUnicodeField, 1, gridy++, 1, 1,
                    normalInsets, GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            JLabel scancodeLabel = new JLabel("Scancode:");
            addComponent(panel, scancodeLabel, 0, gridy, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            scancodeField = new JTextField(20);
            scancodeField.setEditable(false);
            addComponent(panel, scancodeField, 1, gridy++, 1, 1, normalInsets,
                    GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            JLabel extendedKeyCodeLabel = new JLabel("ExtendedKeyCode:");
            addComponent(panel, extendedKeyCodeLabel, 0, gridy, 1, 1,
                    bottomInsets, GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);

            extendedKeyCodeField = new JTextField(20);
            extendedKeyCodeField.setEditable(false);
            addComponent(panel, extendedKeyCodeField, 1, gridy++, 1, 1,
                    bottomInsets, GridBagConstraints.LINE_START,
                    GridBagConstraints.HORIZONTAL);
        }

        private void addComponent(Container container, Component component,
                int gridx, int gridy, int gridwidth, int gridheight,
                Insets insets, int anchor, int fill) {
            GridBagConstraints gbc = new GridBagConstraints(gridx, gridy,
                    gridwidth, gridheight, 1.0D, 1.0D, anchor, fill, insets, 0,
                    0);
            container.add(component, gbc);
        }

        public JPanel getPanel() {
            return panel;
        }

        public void setKeyPressed(KeyEvent event) {
            String s = event.toString();

            keyCodeField.setText(getValue("keyCode", s));
            keyTextField.setText(getValue("keyText", s));
            keyCharField.setText(getValue("keyChar", s));
            keyLocationField.setText(getValue("keyLocation", s));
            modifiersField.setText(getValue("modifiers", s));
            extModifiersField.setText(getValue("extModifiers", s));
            rawCodeField.setText(getValue("rawCode", s));
            primaryLevelUnicodeField
                    .setText(getValue("primaryLevelUnicode", s));
            scancodeField.setText(getValue("scancode", s));
            extendedKeyCodeField.setText(getValue("extendedKeyCode", s));
        }

        private String getValue(String key, String line) {
            int sPos = line.indexOf(key);
            if (sPos >= 0) {
                int nPos = sPos + key.length() + 1;
                int ePos = line.indexOf(",", nPos);
                if (ePos < 0) {
                    ePos = line.indexOf("]", nPos);
                }
                if (ePos >= 0) {
                    return line.substring(nPos, ePos);
                }
            }

            return "";
        }

    }

    public class KeyPressedListener extends KeyAdapter {

        private KeySpy keySpyFrame;

        public KeyPressedListener(KeySpy keySpyFrame) {
            this.keySpyFrame = keySpyFrame;
        }

        @Override
        public void keyPressed(KeyEvent event) {
            keySpyFrame.getKeySpyPanel().setKeyPressed(event);
        }
    }

}