使用Clip对象播放多个声音片段
我正在开发一个包含大量JButton对象的程序，我希望每个对象都有自己的.wav文件。 此外，我希望声音以某种方式工作，使得它们可以与其他按钮的声音重叠，但它不能与自身重叠（在播放声音时单击按钮将重新启动声音）。
我尝试使用一个Clip对象，但我无法完成上面所说的内容。 结果，我使用每个按钮声明一个新的Clip对象，但我觉得这对我的问题来说是一个相当低效的解决方案。
如何以最有效的方式完成我在第一段中所述的内容？
有几种方法可以实现这一点，但基本思路是，您希望将LineListener注册到Clip并监视LineEvent.Type.STOP事件并重新启用该按钮
例如。 这将查找给定目录中的所有.wav文件，并为每个文件创建一个按钮。 单击时，按钮（或更重要的是，基础Action ）被禁用并播放音频。 当它STOP ，重新启用Action （和按扩展的按钮）。
无论如何，Sound API可以同时播放多个声音
import java.awt.EventQueue; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.event.ActionEvent; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import java.io.File; import java.io.FileFilter; import java.io.IOException; import java.io.InputStream; import java.net.MalformedURLException; import java.net.URL; import java.util.concurrent.ExecutionException; import java.util.logging.Level; import java.util.logging.Logger; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.Clip; import javax.sound.sampled.LineEvent; import javax.sound.sampled.LineListener; import javax.sound.sampled.LineUnavailableException; import javax.sound.sampled.UnsupportedAudioFileException; import javax.swing.AbstractAction; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.SwingWorker; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class Test { public static void main(String[] args) { new Test(); } public Test() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { ex.printStackTrace(); } JFrame frame = new JFrame("Testing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(new TestPane()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public class TestPane extends JPanel { public TestPane() { File[] musicFiles = new File("a directory somewhere").listFiles(new FileFilter() { @Override public boolean accept(File pathname) { return pathname.getName().toLowerCase().endsWith(".wav"); } }); setLayout(new GridBagLayout()); GridBagConstraints gbc = new GridBagConstraints(); gbc.gridwidth = GridBagConstraints.REMAINDER; gbc.fill = GridBagConstraints.HORIZONTAL; for (File music : musicFiles) { try { JButton btn = new JButton(new AudioAction(music.getName(), music.toURI().toURL())); add(btn, gbc); } catch (MalformedURLException ex) { ex.printStackTrace(); } } } } public class AudioAction extends AbstractAction { private URL audio; public AudioAction(String name, URL audioSource) { super(name); this.audio = audioSource; } public URL getAudioSource() { return audio; } @Override public void actionPerformed(ActionEvent e) { setEnabled(false); try (InputStream is = getAudioSource().openStream()) { AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(is); Clip play = AudioSystem.getClip(); play.addLineListener(new LineListener() { @Override public void update(LineEvent event) { System.out.println(event.getFramePosition()); if (event.getType().equals(LineEvent.Type.STOP)) { setEnabled(true); } } }); play.open(audioInputStream); play.start(); } catch (IOException | LineUnavailableException | UnsupportedAudioFileException exp) { exp.printStackTrace(); } } } }
nb：我尝试使用Clip#drain （在后台线程中），但它只适用于第一个剪辑，后续剪辑基本上跳过了方法，因此我选择了LineListener
现在有了更好的资源管理
import java.awt.EventQueue; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.event.ActionEvent; import java.io.File; import java.io.FileFilter; import java.io.IOException; import java.io.InputStream; import java.net.MalformedURLException; import java.net.URL; import java.util.logging.Level; import java.util.logging.Logger; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.Clip; import javax.sound.sampled.LineEvent; import javax.sound.sampled.LineListener; import javax.sound.sampled.LineUnavailableException; import javax.sound.sampled.UnsupportedAudioFileException; import javax.swing.AbstractAction; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class Test { public static void main(String[] args) { new Test(); } public Test() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { ex.printStackTrace(); } JFrame frame = new JFrame("Testing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(new TestPane()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public class TestPane extends JPanel { public TestPane() { File[] musicFiles = new File("...").listFiles(new FileFilter() { @Override public boolean accept(File pathname) { return pathname.getName().toLowerCase().endsWith(".wav"); } }); setLayout(new GridBagLayout()); GridBagConstraints gbc = new GridBagConstraints(); gbc.gridwidth = GridBagConstraints.REMAINDER; gbc.fill = GridBagConstraints.HORIZONTAL; for (File music : musicFiles) { try { JButton btn = new JButton(new AudioAction(music.getName(), music.toURI().toURL())); add(btn, gbc); } catch (MalformedURLException exp) { exp.printStackTrace(); } } } } public class AudioAction extends AbstractAction { private AudioPlayer player; public AudioAction(String name, URL audioSource) { super(name); player = new AudioPlayer(audioSource); } @Override public void actionPerformed(ActionEvent e) { if (player.isPlaying()) { player.stop(); } else { try { player.play(); } catch (IOException | LineUnavailableException | UnsupportedAudioFileException ex) { ex.printStackTrace(); } } } } public class AudioPlayer { private Clip clip; private URL url; public AudioPlayer(URL url) { this.url = url; } public boolean isPlaying() { return clip != null && clip.isRunning(); } protected void open() throws IOException, LineUnavailableException, UnsupportedAudioFileException { clip = AudioSystem.getClip(); clip.open(AudioSystem.getAudioInputStream(url.openStream())); } public void play() throws IOException, LineUnavailableException, UnsupportedAudioFileException { if (clip == null || !clip.isRunning()) { open(); clip.setFramePosition(0); clip.start(); } } public void stop() { if (clip != null && clip.isRunning()) { clip.stop(); clip.flush(); dispose(); } } public void dispose() { try { clip.close(); } finally { clip = null; } } } }
每个按钮一个剪辑应该没问题。 当用户单击该按钮时，运行此命令以重新启动剪辑：
sound.stop(); sound.setFramePosition(0);// set the location to the start of the file sound.play();// restart your sound