手机音乐第一次播放成功，第二，三次播放就不一定了，抛异常

我的想法是直接存储音乐流，就写了下面的代码。因为在手机上运行时发现要播放音乐时再创建流，画面会卡一会儿才继续。
 

Java code

  hmIs = getClass().getResourceAsStream("/hitMenu.mid");

  collIs = getClass().getResourceAsStream("/collision.mid");

  goIs = getClass().getResourceAsStream("/gameOver.mid");

  rgIs = getClass().getResourceAsStream("/rightGrid.mid");

  wgIs = getClass().getResourceAsStream("/wrongGrid.mid");

可是这样子的写法只能第一次正常播放。其它时候就手机音乐抛异常：
 

Java code

javax.microedition.media.MediaException: Bad MIDI Format

 at com.sun.mmedia.QSoundMIDIPlayer.doRealize(+203)

 at com.sun.mmedia.BasicPlayer.realize(+84)

 at MusicPlayer.playMusic(+20)

 at MusicPlayer.playWrongGrid(+8)

 at TestCanvas.run(+73)

源代码如下，请问该如何修改呢？
 

Java code

/** 播放声音的类。 */

public class MusicPlayer {

 private int soundVolume;

 private InputStream hmIs;

 private InputStream collIs;

 private InputStream goIs;

 private InputStream rgIs;

 private InputStream wgIs;

 public MusicPlayer() {

  soundVolume = 100;

  hmIs = getClass().getResourceAsStream("/hitMenu.mid");

  collIs = getClass().getResourceAsStream("/collision.mid");

  goIs = getClass().getResourceAsStream("/gameOver.mid");

  rgIs = getClass().getResourceAsStream("/rightGrid.mid");

  wgIs = getClass().getResourceAsStream("/wrongGrid.mid");

 }

 public void playHitMenu() {

  playMusic(hmIs);

 }

 public void playCollision() {

  playMusic(collIs);

 }

 public void playGameOver() {

  playMusic(goIs);

 }

 public void playRightGrid() {

  playMusic(rgIs);

 }

 public void playWrongGrid() {

  playMusic(wgIs);

 }

 public void playMusic(InputStream is) {

  if (soundVolume != 0) {

  try {

   Player player = Manager.createPlayer(is, "audio/midi");

   player.realize();

   VolumeControl control = (VolumeControl) player

 .getControl("VolumeControl");

   if (control != null) {

 control.setLevel(soundVolume);

   }

   player.prefetch();

   player.start();

   // player.stop();

  } catch (MediaException e) {

   e.printStackTrace();

  } catch (IOException e) {

   e.printStackTrace();

  }

  }

 }

}





//Canvas类

public class TestCanvas extends Canvas implements Runnable {

 private int key = 0;

 private MusicPlayer musicPlayer = new MusicPlayer();

 protected void paint(Graphics g) {

  g.setColor(0);

  g.fillRect(0, 0, 240, 310);

  g.setColor(0xffff00);

  g.drawString("1.hitMenu", 120, 50, Graphics.HCENTER | Graphics.TOP);

  g.drawString("2.collision", 120, 80, Graphics.HCENTER | Graphics.TOP);

  g.drawString("3.rightGrid", 120, 110, Graphics.HCENTER | Graphics.TOP);

  g.drawString("4.wrongGrid", 120, 140, Graphics.HCENTER | Graphics.TOP);

  g.drawString("5.gameOver", 120, 170, Graphics.HCENTER | Graphics.TOP);

 }

 public void run() {

  while (true) {

  if (key == 49) {

   musicPlayer.playHitMenu();

  } else if (key == 50) {

   musicPlayer.playCollision();

  } else if (key == 51) {

   musicPlayer.playRightGrid();

  } else if (key == 52) {

   musicPlayer.playWrongGrid();

  } else if (key == 53) {

   musicPlayer.playGameOver();

  }

  key = 0;

  }

 }

 protected void keyPressed(int k) {

  key = k;

 }

}

------解决方法--------------------------------------------------------
你这样写，每种声音只能播放一次，播完一次后流就读到末尾，再运行就出错了

------解决方法--------------------------------------------------------
reset一下就行了，
------解决方法--------------------------------------------------------
刚在模拟器上用LeoTang2说的reset测了下，效果不错。你可以测下真机上效果怎样。