libgdx 播放音乐

1.在主mainGame 里设置music信息

private Music music;
private int musicId;
private int lastMusicId;

public int musicVoice;
public int soundVoice;

2.初始化加载

 musicVoice=gameConfig.playerConfig.getInteger("music",4);
         soundVoice=gameConfig.playerConfig.getInteger("sound",4);
        musicId=gameConfig.geRandomtMusicId(0,0);
        music = Gdx.audio.newMusic(gameConfig.getMusicFile(musicId));
        music.setLooping(true);
        music.setVolume(musicVoice*1f/7);
        music.play();

3.记录音乐信息并加载

 public int geRandomtMusicId(int type,int lastId) {
        Array<XmlReader.Element> xmlEs=getCONFIG_MUSIC().e.getChildrenByName("music");
        int musicId=lastId;
        IntArray rs=game.tempUtil.getTempIntArray();
        for(int i=0;i<xmlEs.size;i++){
            XmlReader.Element e=xmlEs.get(i);
            int id=e.getInt("id");
            if(e.getInt("type",-1)==type&&id!=lastId){
                rs.add(id);
            }
        }
        if(rs.size>0){
            musicId=rs.random();
            game.tempUtil.disposeTempIntArray(rs);
        }
        Gdx.app.log("geRandomtMusicId",lastId+":"+musicId+":"+type);
        return musicId;
    }

    public FileHandle getMusicFile(int musicId){
        XmlReader.Element e=getCONFIG_MUSIC().getElementById(musicId);
        if(e!=null){
            return Gdx.files.internal(e.get("file"));
        }
        return Gdx.files.internal("audio/jokull.mp3");
    }

4.播放

//ifForceLoop 是否强制设定音乐循环
    public void setMusicById(int id,boolean ifForceLoop){
        Gdx.app.log("playMusic",id+":"+musicVoice);
        if(musicId!=id||!music.isLooping()){
           lastMusicId=musicId;
            musicId=id;
            music.pause();
            music.dispose();
            music = Gdx.audio.newMusic(gameConfig.getMusicFile(musicId));
         //   music.setLooping(true);
            music.setVolume(musicVoice*1f/7);
            music.play();
           if(gameConfig.getCONFIG_MUSIC().getElementById(musicId).get("play","loop").equals("loop")||ifForceLoop){
               music.setLooping(true);
           }else{
               music.setLooping(false);
               music.setOnCompletionListener(new Music.OnCompletionListener() {
                   @Override
                   public void onCompletion(Music aMusic) {
                        int musicType=gameConfig.getCONFIG_MUSIC().getElementById(musicId).getInt("type",0);
                       int musicId=gameConfig.geRandomtMusicId(musicType,lastMusicId);
                       setMusicById(musicId,false);
                   }
               });
           }
        }
    }
    public void setMusicByType(int type){
        int musicType=gameConfig.getCONFIG_MUSIC().getElementById(musicId).getInt("type",0);
       if(type!=musicType){
        int musicId=gameConfig.geRandomtMusicId(type,this.musicId);
           setMusicById(musicId,false);
       }
    }

 

　　5.在转换场景中加入切歌

public void toScreen(int nextScreenId) {

if(nextScreenId==81){   //获取战斗场景中的详细音乐设定
            XmlReader.Element xmlE=gameConfig.getDEF_STAGE().getElementById(stageId);
           int musicId=xmlE.getInt("musicId",0);
            if(musicId==-1){//如果值是-1,则默认为通用战斗场景播放
                int bgmType=gameConfig.getCONFIG_LAYOUT().getElementById(screenId).getInt("bgmType");
                setMusicByType(bgmType);
            }else {
               setMusicById(musicId,true);
            }
        }else {//获取普通场景的音乐类型设定
            int bgmType=gameConfig.getCONFIG_LAYOUT().getElementById(screenId).getInt("bgmType");
            setMusicByType(bgmType);
        }


-----------------场景跳转--------------------

}