Libgdx音乐再次无法使用

Question

当用户进入PlayScreen时我开始播放背景音乐，当游戏中的孩子死亡时，背景音乐停止并开始游戏而不是音乐并通过屏幕移动到游戏，然后用户进入菜单屏幕并选择他想要的级别然后回到PlayScreen，但后面的音乐不再工作，我不知道怎么解决它虽然音乐在开始游戏时工作得非常好，当用户赢得关卡时，但它当孩子去世时，它不起作用。这是我停止孩子班级音乐的代码：

public State getState()
    {
        //Gdx.app.log(Float.toString(b2body.getLinearVelocity().x),"hi");
        if ((Hud.getTime()<0)) {
            Fruits.manager.get("music/Backmusic.ogg", Music.class).stop();
            Fruits.manager.get("music/fail.mp3", Sound.class).play();
            collectoIsDead=true;
            Filter filter = new Filter();
            filter.maskBits = Fruits.NOTHING_BIT;
            for (Fixture fixture : b2body.getFixtureList())
                fixture.setFilterData(filter);
            b2body.applyLinearImpulse(new Vector2(0, 5f), b2body.getWorldCenter(), true);
            //b2body.applyLinearImpulse(new Vector2(0,-2.5f), b2body.getWorldCenter(), true);
            Hud.setTime();// to prevent the action of applying more times

            return State.DEAD;
        }
        if ( Rockhit()) {
            Fruits.manager.get("music/Backmusic.ogg", Music.class).stop();
            Fruits.manager.get("music/fail.mp3", Sound.class).play();
            collectoIsDead=true;
            Filter filter = new Filter();
            filter.maskBits = Fruits.NOTHING_BIT;
            for (Fixture fixture : b2body.getFixtureList())
                fixture.setFilterData(filter);
            b2body.applyLinearImpulse(new Vector2(0, 5f), b2body.getWorldCenter(), true);
            //b2body.applyLinearImpulse(new Vector2(0,-2.5f), b2body.getWorldCenter(), true);
            return State.DEAD;
        }
        if((Hud.getTime()==0&& Hud.getScore()>=(level*30)+50)|| (Hud.getScore()>=(level*30)+50)) {
            Fruits.manager.get("music/Backmusic.ogg", Music.class).stop();
            Fruits.manager.get("music/cheering.mp3", Sound.class).play();
            return State.SUCCESS;
        }
        if (b2body.getLinearVelocity().x!=0)
            return State.RUNNING;
        else
            return State.STANDING;
    }

这是我在PlayScreen的构造函数中启动音乐的代码：

public PlayScreen(Fruits game, float level)
    {
        this.level=level;
        this.game=game;
        gamecam=new OrthographicCamera();

        gameport=new FitViewport(Fruits.V_WIDTH/Fruits.PPM,Fruits.V_HIEGT/Fruits.PPM,gamecam);

        hud=new Hud(game.batch,level);
        atlas=new TextureAtlas("mypack.pack");
        mapLoader=new TmxMapLoader();

            map=mapLoader.load("world10.tmx");

        renderer=new OrthogonalTiledMapRenderer(map,1/Fruits.PPM);
        gamecam.position.set(gameport.getWorldWidth()/2,gameport.getWorldHeight()/2f,0);
        globalcounter=100;
        world=new World(new Vector2(0,-10),true);
        b2dr=new Box2DDebugRenderer();
        new B2WorldCreator(this);
        player=new Collector(world,this,level);
        world.setContactListener(new WorldContactListener());
        controller=new Controller(game.batch);

        music=Fruits.manager.get("music/Backmusic.ogg", Music.class);
        music.setLooping(true);
        music.play();
    }