java - Libgdx - 序列化平台问题

Question

所以最近我一直在与 Libgdx 的序列化工具作斗争。我目前正在尝试将我的播放器类和我的 GameEntry 类写入一个文件，以便稍后在用户退出应用程序时访问该文件。我目前的方法在我的应用程序的计算机版本上运行得很好，但是当涉及到 android 平台时，它并没有取得同样的成功。我已经添加了到我的 list ，但我仍然收到以下错误。

com.badlogic.gdx.utils.GdxRuntimeException: Error writing file: player.dat (Absolute)

然后出现以下导致游戏崩溃的错误。

com.badlogic.gdx.utils.GdxRuntimeException: Error reading file: scores.dat (Absolute)

这是游戏这部分的代码。我根据平台是否检测到这些文件，在 create() 方法中调用保存和读取方法。

public static void saveFile(ArrayList<GameEntry> scores) throws IOException{        
    FileHandle file = Gdx.files.absolute("scores.dat");
    OutputStream out = null;
    try{
        file.writeBytes((serialize(scores)), false);
    }catch(Exception ex){

    }finally{
        if(out != null) try{out.close();} catch(Exception ex){}
    }

    Gdx.app.log(Asteroids.LOG, "Saving File: " + scores.toString());
}

public static void savePlayer(Player player) throws IOException{        
    FileHandle file = Gdx.files.absolute("player.dat");
    PlayerData playerData = new PlayerData(player);
    OutputStream out = null;
    try{
        file.writeBytes((serialize(playerData)), false);
    }catch(Exception ex){
        Gdx.app.log(Asteroids.LOG, ex.toString());
    }finally{
        if(out != null) try{out.close();} catch(Exception ex){}
    }

    Gdx.app.log(Asteroids.LOG, "Saving Player");
}

@SuppressWarnings("unchecked")
public static ArrayList<GameEntry> readFile() throws IOException, ClassNotFoundException{
    FileHandle file = Gdx.files.absolute("scores.dat");
    scores = (ArrayList<GameEntry>) deserialize(file.readBytes());

    Gdx.app.log(Asteroids.LOG, "Reading File: " + scores.toString());
    return scores;
}

public static Player readPlayer() throws IOException, ClassNotFoundException{
    Player player = null;
    PlayerData playerData = null;
    FileHandle file = Gdx.files.absolute("player.dat");
    playerData = (PlayerData) deserialize(file.readBytes());

    player = new Player(new Texture(Gdx.files.internal("Ships/defaultShip.png")), new Vector2((Gdx.graphics.getWidth() / 2) - 25, 50), Player.PLAYER_WIDTH,Player.PLAYER_HEIGHT);
    player.setHealth((int) playerData.getPlayerHealth());
    player.setMaxHealth((int) playerData.getPlayerMaxHealth());
    player.setShieldHealth(playerData.getPlayerShieldHealth());
    player.setBulletCount(playerData.getBulletCount());
    player.setShieldRegenRate(playerData.getPlayerShieldRegenRate());
    player.setPlayerScore(playerData.getPlayerScore());
    player.setEntityTexture(new Texture(Gdx.files.internal(playerData.getPlayerShipName())));
    player.update();

    Gdx.app.log(Asteroids.LOG, "Reading Player");
    return player;
}

public static byte[] serialize(Object obj) throws IOException {
    ByteArrayOutputStream b = new ByteArrayOutputStream();
    ObjectOutputStream o = new ObjectOutputStream(b);
    o.writeObject(obj);
    return b.toByteArray();
}

public static Object deserialize(byte[] bytes) throws IOException, ClassNotFoundException {
    ByteArrayInputStream b = new ByteArrayInputStream(bytes);
    ObjectInputStream o = new ObjectInputStream(b);
    return o.readObject();
}

如有任何帮助或意见，我们将不胜感激。

Answer 1

您可能不想使用绝对(完全限定)路径，因为您需要的字符串在每个平台上都不同。您可能想使用 Gdx.files.local() type path .

参见 https://code.google.com/p/libgdx/wiki/FileHandling了解详情。 Libgdx 路径选择有点复杂，因为 Java/Android/Desktop/GWT/iOS 存储选项的交集很复杂。