java - libgdx 中的音乐流不起作用（JAVA）

Question

所以我一直在做一个libGDX项目，在这里遇到了一个问题：

 public class Main extends ApplicationAdapter implements Screen {
      (...)
 @Override
 public void create() {
 (...)
 //Starts playing Main theme Music
 MusicPlayer.determineMusic(mainTheme, splash);

 }

 public void render() {

    Gdx.gl.glClearColor(1, 1, 1, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

    batch.begin();

        //was:
        //splash.splashRenderer(mainTheme, batch, splashSprite);

        //changed to:
        splash.splashRenderer(batch, splashSprite);

    batch.end();

    System.out.println("******************End of Render******************");
}


public class SplashScreen {


 Music gameTheme ;

    public SplashScreen(){
    }

    public void splashRenderer(SpriteBatch batch, Sprite splashSprite) {
    batch.draw(splashSprite, 0, 0, MyConstants.WINDOW_WIDTH,                    MyConstants.WINDOW_HEIGHT);
    }

   @Override
   public void show() {
       //gameTheme = Gdx.audio.newMusic(Gdx.files.internal("blah.mp3"));
       //gameTheme.play();
   }

   @Override
   public void hide() {
       //gameTheme.dispose();
   }

   @Override
   public void dispose() {
      //gameTheme.dispose();

   }

}

public class MusicPlayer {

   protected MusicPlayer(){
   }

   public static void determineMusic(Music Theme, AbstractScreen screen){

       if ((screen instanceof GameScreen) == false){
           Theme.play();
       }
   }

}

到目前为止的代码基本上只是加载一个音乐文件和一个精灵并通过splashRenderer方法将其绘制在屏幕上，但我的问题是音乐没有开始。任何帮助将不胜感激。提前致谢。

EDIT1~ 我实现了 Screen，将方法更改为 splashRenderer(SpriteBatch, Sprite) 并在 show 方法中加载和播放音乐文件，并在 hide 和 dispose 方法中 dispose() 它。我没有在 pause() 方法中添加任何内容，因为我认为它是自动完成的。

EDIT2~ 我注意到这次音乐也没有开始。我想出的解决方案是创建一个新类 MusicPlayer() 来确定是否播放以及播放哪个曲目。musicPlayer 首先在 create() 中显式调用，并且可能在处理 mouseEvents 时在需要时被调用。

请提供有关这些更改的反馈（好/坏/由于这个和那个原因要避免等）。谢谢！

Answer 1

我做了以下事情：

public abstract class BaseScreen implements Screen, InputProcessor
{
     public BaseScreen() 
     {
         windowWidth = Gdx.graphics.getWidth();
         windowHeight = Gdx.graphics.getHeight();
         AudioManager.getScreenThemes().put(this, getScreenMusic());
     }

     public void pause()
     {
         AudioManager.pause();
     }

     public void resume()
     {
         AudioManager.play();
     }

     public void show()
     {
         Gdx.input.setInputProcessor(this);
         AudioManager.switchMusic(this);
     }


     public abstract Music getScreenMusic();
     ...
}

另一个屏幕：

@Override
public Music getScreenMusic()
{
    return Resources.soundGameTheme;
}

音频管理器：

static
{
    screenThemes = new HashMap<Screen, Music>();
    currentlyPlayed = null;
}

public static boolean getSoundEnabled()
{
    return MyGame.getPreferences().getBoolean(Resources.soundEnabledKey);
}

private static Map<Screen, Music> screenThemes;

public static Music currentlyPlayed;

public static void play()
{
    if(getSoundEnabled() != false)
    {
        if(currentlyPlayed != null)
        {
            if(currentlyPlayed.isPlaying() == false)
            {
                currentlyPlayed.play();
            }
        }
    }
}

public static void initialize()
{
    Resources.soundMainMenuTheme = Gdx.audio.newMusic(Gdx.files.internal("data/main_menu.mp3"));
    Resources.soundGameTheme = Gdx.audio.newMusic(Gdx.files.internal("data/game.mp3")); 
    Resources.soundMainMenuTheme.setLooping(true);
    Resources.soundGameTheme.setLooping(true);
}

public static void stop()
{
    if(currentlyPlayed != null)
    {
        if(currentlyPlayed.isPlaying() == true)
        {
            currentlyPlayed.stop();
        }
    }
}

public static void pause()
{
    if(getSoundEnabled() != false)
    {
        if(currentlyPlayed != null)
        {
            if(currentlyPlayed.isPlaying() == true)
            {
                currentlyPlayed.pause();
            }
        }
    }
}

public static void switchMusic(Screen screen)
{
    if(screenThemes.get(screen) != currentlyPlayed)
    {
        if(screenThemes.get(screen) != null)
        {
            stop();
            currentlyPlayed = screenThemes.get(screen);
            play();
        }
    }
}

public static void dispose()
{
    Resources.soundMainMenuTheme.dispose();
    Resources.soundGameTheme.dispose();
    screenThemes = null;
}

public static Map<Screen, Music> getScreenThemes()
{
    return screenThemes;
}

我承认，这不是最漂亮的东西——我应该使用像枚举这样的单例，而不是以这种方式使其成为静态的。但它起作用了，虽然它基本上会在您导航到特定歌曲时播放特定歌曲，Screen如果要在屏幕上播放的歌曲不同，它会更改歌曲。

编辑：

喜好：

public class MyGame extends Game
{
    private static Preferences preferences;

    @Override
    public void create()
    {
        ... 
        preferences = Gdx.app.getPreferences(Resources.preferencesName);
        ...
    }

    public static Preferences getPreferences()
    {
        return preferences;
    }
}