java和引擎无法从资产中加载TMXTiledMap错误

Question

我一直在尝试创建一个模仿AndEngine TMXTiledMapExample的类，但我无法让我的简单类从我的资产中加载TMXTiledMap。有人能帮我理解发生了什么事吗？我已经设置了我的资产基础路径，并且几乎复制了TMXTiledMapExample

@Override
protected void onCreateResources() {
    //page 28
    BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/");


    mBitmapTextureAtlas = new BitmapTextureAtlas(getTextureManager(),  512, 1024,  TextureOptions.DEFAULT);
    this.playerTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(mBitmapTextureAtlas, this, "Boost.png", 100, 100);
    mBitmapTextureAtlas.load();

}

@Override
protected Scene onCreateScene() {
    this.mEngine.registerUpdateHandler(new FPSLogger());
    final Scene scene = new Scene();

    //Create tmxLoader with internal listener that can listen for properties of tiles (such as collisions, item pickups etc.)
    try{

        final TMXLoader tmxLoader = new TMXLoader(this.getAssets(), this.mEngine.getTextureManager(), TextureOptions.BILINEAR_PREMULTIPLYALPHA, this.getVertexBufferObjectManager());

        //Get instance of the map   
        this.mTMXTiledMap = tmxLoader.loadFromAsset("level1.tmx");



    }catch(final TMXException tmxe){
        Debug.e(tmxe);
    }

错误消息： 03-13 23:49:11.057:E/AndEngine（27801）：AndEngine 03-13 23:49:11.057:E/AndEngine（27801）：阿托格。和发动机。扩大tmx。TMXLoader。loadFromAsset（TMXLoader.java:104）