java - Libgdx:当 AssetManager.Update() 返回 true 时无法转换纹理

Question

我正在学习如何使用 libgdx，但我在此处或文档中都没有找到对此的 awsnser。我的问题在标题中已经说得很清楚了。当我尝试在 5 秒前加载纹理时(这是因为我使用 Gdx 计时器，仅用于测试)，应用程序崩溃并给出此信息

Exception in thread "LWJGL Application" java.lang.ClassCastException: com.badlogic.gdx.graphics.Texture cannot be cast to com.badlogic.gdx.scenes.scene2d.ui.Image
at com.hoticecream.mad.Background.setStaticBackground(Background.java:33)
at com.hoticecream.mad.Playgorund$1.run(Playgorund.java:102)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.executeRunnables(LwjglApplication.java:257)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:208)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:124)

由于时间短，我将发布整个类(class)

 class Background {

    private  Image background;
    private final String backgroundName;
    private  AssetManager manager;

    Background(AssetManager manager){

        this.manager = manager;

        background = new Image();

        backgroundName = "background1.png";
        manager.load(backgroundName, Texture.class);
        manager.finishLoadingAsset(backgroundName);



    }

    public void setStaticBackground(Stage stage){


        //here is where error happends, affter manager.update() returning true
        if(manager.update()){
            background = manager.get(backgroundName);

        }else {
            Gdx.app.log("Manager","not loaded");
        }

        background.setHeight(stage.getHeight());
        background.setWidth(stage.getWidth());

        stage.addActor(background);
    }

    public void dispose(){

        manager.unload(backgroundName);

    }

}

幻灯片注释: Assets 管理器通过内部类的参数传递

Answer 1

显然，您从管理器获取的对象(它是纹理，因为设置的加载器类型 - manager.load(backgroundName, Texture.class);)不可转换为 图像类型。

尝试从纹理创建一个 Image 对象:

...
if(manager.update()){
    background = new Image((Texture) manager.get(backgroundName));
...