小弟設計遊戲音樂不知如何讓音樂迴圈有人可以教我嗎感恩

package wyf.ytl;
import java.util.HashMap;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.media.AudioManager;
import android.media.SoundPool;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class WelcomeView extends SurfaceView implements SurfaceHolder.Callback {
 PlaneActivity activity;//activity的引用
 private TutorialThread thread;//更新視框的執行緒
 private WelcomeViewThread welcomeThread;//繪製執行緒
 int status = 1;//當前的狀態值
 int k = 0;//狀態為2時用到的切換圖片
 int alpha = 255;//透明度
 
 SoundPool soundPool;//聲音
 HashMap soundPoolMap;
 Bitmap welcomeborder;//背景外框圖片
 Bitmap background;//背景圖片
 Bitmap background2;//背景圖片2
 Bitmap image1,image2,image3,image4,image5,image6,image7;//動畫視框
 Bitmap startGame;//開始遊戲功能表
 Bitmap help;//?明功能表
 Bitmap openSound;//打開聲音功能表
 Bitmap closeSound;//關閉聲音功能表
 Bitmap exit;//退出功能表
 
 int backgroundY = -200;//背景的座標
 int background2Y = 40;
 
 Paint paint;//用於改變透明度
 Paint paint2;//正常繪製
 public WelcomeView(PlaneActivity activity) {//建構式
  super(activity);
  this.activity = activity;//得到activity的引用

        if(activity.processView != null){//走載入介面進度
         activity.processView.process += 10;
        }
        getHolder().addCallback(this);
        this.thread = new TutorialThread(getHolder(), this);
        this.welcomeThread = new WelcomeViewThread(this);
       
        if(activity.processView != null){//走載入介面進度
         activity.processView.process += 10;
        }
        initSounds();//初始化聲音
        initBitmap();//初始化圖片資源
        playSound(1);
 }
 public void initSounds(){//初始化聲音的方法
      soundPool = new SoundPool(4, AudioManager.STREAM_MUSIC, 100);//初始化SoundPool
      soundPoolMap = new HashMap();//初始化HashMap
      soundPoolMap.put(1, soundPool.load(getContext(), R.raw.welcome1, 1));
 }
 public void playSound(int sound) {//播放聲音的方法
     AudioManager mgr = (AudioManager)getContext().getSystemService(Context.AUDIO_SERVICE);
     float streamVolumeCurrent = mgr.getStreamVolume(AudioManager.STREAM_MUSIC);  
     float streamVolumeMax = mgr.getStreamMaxVolume(AudioManager.STREAM_MUSIC);//設定最大音量
     float volume = streamVolumeCurrent/streamVolumeMax;   //裝置的音量
     soundPool.play(soundPoolMap.get(sound), volume, volume, 1, 0, 1f);//播放
 }
 
 public void initBitmap(){//初始化圖片資源的方法
  paint = new Paint();
  paint2 = new Paint();
        if(activity.processView != null){//走載入介面進度
         activity.processView.process += 10;
        }
  welcomeborder = BitmapFactory.decodeResource(getResources(), R.drawable.welcomeborder);
  background = BitmapFactory.decodeResource(getResources(), R.drawable.background);
  image1 = BitmapFactory.decodeResource(getResources(), R.drawable.image1);
        if(activity.processView != null){//走載入介面進度
         activity.processView.process += 10;
        }
  image2 = BitmapFactory.decodeResource(getResources(), R.drawable.image2);//初始化動畫視框
  image3 = BitmapFactory.decodeResource(getResources(), R.drawable.image3);//初始化動畫視框
        if(activity.processView != null){//走載入介面進度
         activity.processView.process += 10;
        }
  image4 = BitmapFactory.decodeResource(getResources(), R.drawable.image4);//初始化動畫視框
  image5 = BitmapFactory.decodeResource(getResources(), R.drawable.image5);//初始化動畫視框
        if(activity.processView != null){//走載入介面進度
         activity.processView.process += 10;
        }
  image6 = BitmapFactory.decodeResource(getResources(), R.drawable.image6);//初始化動畫視框
  image7 = BitmapFactory.decodeResource(getResources(), R.drawable.image7);//初始化動畫視框
  
        if(activity.processView != null){//走載入介面進度
         activity.processView.process += 10;
        }
  background2 = BitmapFactory.decodeResource(getResources(), R.drawable.background2);//初始化背景圖片
  startGame = BitmapFactory.decodeResource(getResources(), R.drawable.startgame);//初始化開始遊戲
        if(activity.processView != null){//走載入介面進度
         activity.processView.process += 10;
        }
  help = BitmapFactory.decodeResource(getResources(), R.drawable.help);//幫助
  openSound = BitmapFactory.decodeResource(getResources(), R.drawable.opensound);//打開聲音
        if(activity.processView != null){//走載入介面進度
         activity.processView.process += 10;
        }
  closeSound = BitmapFactory.decodeResource(getResources(), R.drawable.closesound);//關閉聲音
  exit = BitmapFactory.decodeResource(getResources(), R.drawable.exit);//退出遊戲
        if(activity.processView != null){//走載入介面進度
         activity.processView.process += 10;
        }
 }
 public void onDraw(Canvas canvas){//自己寫的繪製方法
  //畫的內容是z軸的，後畫的會覆蓋前面畫的
  canvas.drawColor(Color.WHITE);//背景色
  if(this.status == 1 || this.status == 2){
   canvas.drawBitmap(background, 0, backgroundY, paint);//繪製背景
   if(k == 0){
    canvas.drawBitmap(image1, 0, 48, paint);
   }else if(k > 0 && k<=1){
    canvas.drawBitmap(image2, 0, 48, paint);
   }else if(k>1 && k<=2){
    canvas.drawBitmap(image3, 0, 48, paint);
   }else if(k>2 && k<=3){
    canvas.drawBitmap(image4, 0, 48, paint);
   }else if(k>3 && k<=4){
    canvas.drawBitmap(image5, 0, 48, paint);
   }else if(k>4 && k<=5){
    canvas.drawBitmap(image6, 0, 48, paint);
   }else if(k>5 && k<=6){
    canvas.drawBitmap(image7, 0, 48, paint);
   }else if(k>6 && k<=7){
    canvas.drawBitmap(image4, 0, 48, paint);
   }else if(k>7 && k<=8){
    canvas.drawBitmap(image3, 0, 48, paint);
   }else if(k>8 && k<=10){
    canvas.drawBitmap(image2, 0, 48, paint);
   }
   canvas.drawRect(0, 0, 480, 48, paint);//繪製上下的黑框
   canvas.drawRect(0, 270, 480, 320, paint);//繪製矩形
   canvas.drawBitmap(welcomeborder, -14, 10, paint);//繪製外框
  }
  else if(status == 3){
   paint.setAlpha(alpha);//設定透明度
   canvas.drawBitmap(background2, 0, background2Y, paint);//繪製背景圖
   canvas.drawRect(0, 0, 480, 48, paint2);//繪製上下的黑框
   canvas.drawRect(0, 270, 480, 320, paint2);//繪製矩形框
  }
  else if(status == 4){//功能表狀態
   canvas.drawBitmap(background2, 0, background2Y, paint);//繪製背景圖
   canvas.drawBitmap(startGame, 10, 70, paint2);//繪製開始遊戲按鈕
   canvas.drawBitmap(help, 390, 60, paint2);//繪製說明按鈕
   canvas.drawBitmap(exit, 380, 230, paint2);//繪製退出按鈕
   if(activity.isSound){
    canvas.drawBitmap(closeSound, 10, 230, paint2);//繪製關閉聲音功能表
   }else{
    canvas.drawBitmap(openSound, 10, 230, paint2);//繪製打開聲音
   }
   canvas.drawRect(0, 0, 480, 48, paint2);//繪製上下的黑框
   canvas.drawRect(0, 270, 480, 320, paint2);
  }
 }
 public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
 }
 public void surfaceCreated(SurfaceHolder holder) {//新建時被呼叫
        this.thread.setFlag(true);//設定迴圈標記位元
        this.thread.start();//啟動繪製執行緒
        this.welcomeThread.setFlag(true);//設定迴圈標記位元
        this.welcomeThread.start(); //啟動動畫執行緒
 }
 public void surfaceDestroyed(SurfaceHolder holder) {//摧毀時被呼叫
        boolean retry = true;//迴圈標記
        thread.setFlag(false);
        while (retry) {
            try {
                thread.join();//等待中的執行緒的結束
                retry = false;//設定迴圈標記停止迴圈
            }
            catch (InterruptedException e) {}//不斷地迴圈，直到更新視框執行緒結束
        }
 }
 public boolean onTouchEvent(MotionEvent event) {//螢幕監聽
  if(event.getAction() == MotionEvent.ACTION_DOWN){//螢幕被按下
   if(this.status != 4){//當不是功能表狀態時返回
    return false;
   }
   double x = event.getX();//得到X座標
   double y = event.getY();//得到Y座標
   if(x>10 && x<10 + openSound.getWidth()
     && y>70 && y<70 + openSound.getHeight()){//點擊了開始有些按鈕
    activity.myHandler.sendEmptyMessage(2);//發送訊息
   }
   else if(x>390 && x<390 + help.getWidth()
     && y>60 && y<60 + help.getHeight()){//點擊了說明按鈕
    activity.myHandler.sendEmptyMessage(3);//發送訊息
   }
   else if(x>10 && x<10 + openSound.getWidth()
     && y>230 && y<230 + openSound.getHeight()){//點擊了聲音按鈕
    activity.isSound = !activity.isSound;//將聲音旗標位置反
   }
   else if(x>380 && x<380 + exit.getWidth()
     && y>230 && y<230 + exit.getHeight()){//點擊了退出按鈕
    System.exit(0);//退出遊戲
   }
  }
  return super.onTouchEvent(event);//呼叫基類的方法
 }
 class TutorialThread extends Thread{//更新視框執行緒
  private int span = 100;//睡眠的毫秒數
  private SurfaceHolder surfaceHolder;
  private WelcomeView welcomeView;//歡迎介面的引用
  private boolean flag = false;
        public TutorialThread(SurfaceHolder surfaceHolder, WelcomeView welcomeView) {//建構式
            this.surfaceHolder = surfaceHolder;//SurfaceHolder的引用
            this.welcomeView = welcomeView;//歡迎介面的引用
        }
        public void setFlag(boolean flag) {//設定標準位元
         this.flag = flag;
        }
  public void run() {//覆寫的run方法
   Canvas c;
            while (this.flag) {//迴圈
                c = null;
                try {
                 // 鎖定整個畫布，在記憶體要求比較高的情況下，建議參數不要為null
                    c = this.surfaceHolder.lockCanvas(null);
                    synchronized (this.surfaceHolder) {//同步
                     welcomeView.onDraw(c);//呼叫繪製方法
                    }
                } finally {//用finally保證一定被執行
                    if (c != null) {
                     //更新螢幕顯示內容
                        this.surfaceHolder.unlockCanvasAndPost(c);
                    }
                }
                try{
                 Thread.sleep(span);//睡眠指定毫秒數
                }catch(Exception e){//捕獲異常
                 e.printStackTrace();//列印異常資訊
                }
            }
  }
 }
}