I've written a simple class which plays audio in an app. Only problem
now is the thread won't die and the app stays up.
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.LineEvent;
import javax.sound.sampled.LineListener;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;
/**
* This class provides simple functions for playing sounds
*
* @author ryan
*/
public class SoundPlayer implements LineListener, Runnable
{
private File soundFile;
private Thread thread;
private static SoundPlayer player;
/**
* Private because of the singleton
*/
private SoundPlayer()
{
}
/**
* Play a siren sound
*/
public static void playSiren()
{
SoundPlayer p = getPlayer();
p.playSirenFile();
}
/**
* Play the siren file
*/
private void playSirenFile()
{
this.soundFile = new File("./audio/threeHorn.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()));
Clip clip = (Clip) AudioSystem.getLine(info);
clip.addLineListener(this);
clip.open(stream);
clip.start();
try
{
thread.sleep(99);
}
catch (Exception e)
{
}
while (clip.isActive() && thread != null)
{
try
{
thread.sleep(99);
}
catch (Exception e)
{
break;
}
}
clip.stop();
clip.close();
}
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 SoundPlayer getPlayer()
{
if (player == null)
{
player = new SoundPlayer();
}
return player;
}
public void update(LineEvent event)
{
}
public static void main(String[] args)
{
SoundPlayer.playSiren();
}
}
