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; }}

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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

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reset一下就行了，
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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。