如何停止音乐剪辑？

Question

我正在和一些同学一起开发一个游戏，到目前为止，除了音乐之外，我们已经编写了几乎所有的东西。 music.java 类发布在下面。

我们在停止声音时遇到了问题，因此我需要一种方法来停止播放此剪辑，这样我们才能真正开始另一个剪辑，这样我们就可以在游戏期间切换音乐（例如，当您开始游戏时，歌曲应该不同于主菜单）。

即使我可以摧毁物体来制造一个新的，如果有可能，我愿意这样做，但我不知道如何做到这一点。我宁愿有可能停止当前的剪辑文件，并用新的文件替换它。

package sound;

import java.io.File;
import java.io.IOException;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.LineEvent;
import javax.sound.sampled.LineListener;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;


public class Music implements LineListener, Runnable
{

private File soundFile;
private Thread thread;
private static Music player;
private Music audio;
private Clip clip;
private boolean stoppen = false;

/**
* Private because of the singleton
*/
public Music()
{
}

/**
* Play a siren sound
*/
public void playSiren(String musicFileName)
{
    audio = getPlayer();

    audio.playSirenFile(musicFileName);
}

/**
* Play the siren file
*/
private void playSirenFile(String musicFileName)
{
    this.soundFile = new File("Music/"+musicFileName+".wav");
    thread = new Thread(this);
    thread.setName("SoundPlayer");
    thread.start();
}

/**
* Invoked when the thread kicks off
*/
public void run()
{
    try
    {
        AudioInputStream stream =     AudioSystem.getAudioInputStream(this.soundFile);
        AudioFormat format = stream.getFormat();

/**
* we can't yet open the device for ALAW/ULAW playback, convert
* ALAW/ULAW to PCM
*/
            if ((format.getEncoding() == AudioFormat.Encoding.ULAW) ||    (format.getEncoding() == AudioFormat.Encoding.ALAW))
            {
            AudioFormat tmp = new AudioFormat(
                AudioFormat.Encoding.PCM_SIGNED,
            format.getSampleRate(),
            format.getSampleSizeInBits() * 2, format.getChannels(),
            format.getFrameSize() * 2, format.getFrameRate(), true);
            stream = AudioSystem.getAudioInputStream(tmp, stream);
            format = tmp;
        }
        DataLine.Info info = new DataLine.Info(Clip.class, stream
        .getFormat(), ((int) stream.getFrameLength() * format
        .getFrameSize()));

        this.clip = (Clip) AudioSystem.getLine(info);
        this.clip.addLineListener(this);
        this.clip.open(stream);
        this.clip.start();
        try
        {
            thread.sleep(99);
        }
        catch (Exception e)
        {
        }
        while (clip.isActive() && thread != null)
        {
            try
            {
                thread.sleep(99);
            }
            catch (Exception e)
            {
                break;
            }
        }
        clip.loop(999999999);
        clip.drain();


    }
    catch (UnsupportedAudioFileException e)
    {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }
    catch (IOException e)
    {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }
    catch (LineUnavailableException e)
    {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }
}

private static Music getPlayer()
{
    if (player == null)
    {
        player = new Music();
    }
    return player;
}

public void update(LineEvent event)
{
}

public void stopClip()
{
    //TODO NEED HELP HERE
}

public void startClip()
{
    //TODO need help here
}
public void volume(float volume)
{

    //TODO NEED HELP HERE
    /*
    FloatControl gainControl = (FloatControl) clip.getControl(FloatControl.Type.MASTER_GAIN);
    gainControl.setValue(-50.0f); // Reduce volume IN DECIBELS
    clip.start();
        */
    }
}

在我的 GuiController 中，我创建了一个新的 Music 对象，通过 playSiren 方法我给了我的歌曲名称，然后它会自动运行。

Answer 1

查看DataLine.stop() 方法。 Clip 实现 DataLine。

---

例如ClipControl.java

import java.awt.event.*;
import javax.swing.*;
import javax.sound.sampled.*;
import java.net.URL;

class ClipControl {

    public static void main(String[] args) throws Exception {
        URL url = new URL("http://pscode.org/media/leftright.wav");
        AudioInputStream ais = AudioSystem.getAudioInputStream(url);
        final Clip clip = AudioSystem.getClip();
        clip.open( ais );
        Runnable r = new Runnable() {
            public void run() {
                final JToggleButton startStop = new JToggleButton("Stop");
                startStop.addActionListener( new ActionListener() {
                    public void actionPerformed(ActionEvent ae) {
                        if (startStop.isSelected()) {
                            clip.stop();
                            startStop.setText("Start");
                        } else {
                            clip.loop(-1);
                            clip.start();
                            startStop.setText("Stop");
                        }
                    }
                } );
                clip.loop(-1);
                JOptionPane.showMessageDialog(null, startStop);
            }
        };
        SwingUtilities.invokeLater(r);
    }
}