LibGDX TextureRegion空指针异常

Question

我已经开始使用Lib GDX AssetManager，而不是“正常”的方式来导入纹理。但是，在尝试使用它时，我很快遇到了NullPointerException错误。下面是代码：

assets = Generals.getAssetManager(); 
    assets.load("Characters/c.pack", TextureAtlas.class); 
    assets.finishLoading(); 
    TextureAtlas atlas = assets.get("Characters/c.pack", TextureAtlas.class); 
    atlas.findRegion("PriestOverworld3"); 
    Array<TextureRegion> frames = new Array<TextureRegion>(); 
    Texture testtex = new Texture("Characters/c.png"); 
    TextureRegion test = new TextureRegion(testtex); 
    for (int i = 0; i < 3; i++) { 
     System.out.println(i); 
     frames.add(new TextureRegion(getTexture(), i * 16, 0, 16, 16)); 
    } 
    playerStasis = new Animation<>(0.2f, frames); 

我在该行得到一个NullPointerException

frames.add(new TextureRegion(getTexture(), i * 16, 0, 16, 16)); 

错误：

Exception in thread "LWJGL Application" java.lang.NullPointerException 
    at com.badlogic.gdx.graphics.g2d.TextureRegion.setRegion(TextureRegion.java:82) 
    at com.badlogic.gdx.graphics.g2d.TextureRegion.<init>(TextureRegion.java:53) 
    at Project.sprites.Player.<init>(Player.java:55) 

TextureRegion：

// TextureRegion.java:53 
setRegion(x, y, width, height); 
... 
// TextureRegion.java:82 
float invTexWidth = 1f/texture.getWidth(); 

Answer 1

它看起来像你找到地图区域和不把它设置为一个变量。

尝试使用此

frames.add(new TextureRegion(atlas.findRegion("PriestOverworld3"), i * 16, 0, 16, 16));