Actor.setx =致命的例外：GLThread 2967

我真的把我的头发拉上了这个有趣的问题。我正在做我的加载屏幕。 SmallBox会根据资产经理的负载百分比向右移动。当我尝试为我的小盒子设置X（）时，我收到了“FATAL EXCEPTION：GLThread 2967”。我尝试调整大小（）但没有运气，同样的错误。我不确定我出错的地方。Actor.setx =致命的例外：GLThread 2967

这里是我的代码：对logcat的

11-01 22:08:54.308: I/awesomegame(24701): LoadingScreen: =-800 getProgress0.0 
11-01 22:08:54.318: D/memalloc(24701): /dev/pmem: Unmapping buffer base:0x51f68000 size:10297344 offset:9527296 
11-01 22:08:54.328: W/dalvikvm(24701): threadid=11: thread exiting with uncaught exception (group=0x40c2ca68) 
11-01 22:08:54.328: E/AndroidRuntime(24701): FATAL EXCEPTION: GLThread 2967 
11-01 22:08:54.328: E/AndroidRuntime(24701): java.lang.NullPointerException 
11-01 22:08:54.328: E/AndroidRuntime(24701): at com.example.awesomegame.screens.LoadingScreen.render(LoadingScreen.java:128) 
11-01 22:08:54.328: E/AndroidRuntime(24701): at com.badlogic.gdx.Game.render(Game.java:46) 
11-01 22:08:54.328: E/AndroidRuntime(24701): at com.example.awesomegame.somegame.render(somegame.java:25) 
11-01 22:08:54.328: E/AndroidRuntime(24701): at com.badlogic.gdx.backends.android.AndroidGraphics.onDrawFrame(AndroidGraphics.java:487) 
11-01 22:08:54.328: E/AndroidRuntime(24701): at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1463) 
11-01 22:08:54.328: E/AndroidRuntime(24701): at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1217)

然而

public class LoadingScreen extends AbstractScreen { 

private Image bigBox, smallBox; 
private Stage stage; 
float loadingPercent=0f; 
private SpriteBatch batch; 
private Texture loadingTexture; 

public LoadingScreen(game game) { 
    super(game); 

    // load asset here 
    Gdx.app.log("gamelog", "assetManager.load()"); 
    game.assetManager.load("img/loading.pack", TextureAtlas.class); 
    game.assetManager.load("img/splash.pack", TextureAtlas.class); 
} 

@Override 
public void show() { 
    stage = new Stage(); 

    batch = new SpriteBatch(); 
    loadingTexture = new Texture(Gdx.files.internal("img/loadingTexture.png")); 
    loadingTexture.setFilter(TextureFilter.Linear, TextureFilter.Linear); 

    TextureRegion bigBoxTr = new TextureRegion(loadingTexture, 0, 0, 800, 480); 
    TextureRegion smallBoxTr = new TextureRegion(loadingTexture, 0, 790, 800, 110); 

    Image bigBox = new Image(bigBoxTr); 
    Image smallBox = new Image(smallBoxTr); 

    smallBox.setX(-800); 
    smallBox.setY(160); 

    bigBox.setX(0); 
    bigBox.setY(0); 

    stage.addActor(bigBox); 
    stage.addActor(smallBox); 
} 

@Override 
public void render(float delta) { 
    // Clear the screen 
    Gdx.gl.glClearColor(0f, 0f, 0f, 1f); 
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); 

    loadingPercent = Interpolation.linear.apply(loadingPercent, game.assetManager.getProgress(), 0.1f); 
    Gdx.app.log("gamelog", "LoadingScreen: =" + (-800+(int)(loadingPercent*800*2)) + " getProgress" + game.assetManager.getProgress()); 

    smallBox.setX(-800+(int)(loadingPercent*800*2)); //<------ problem point 
    smallBox.invalidate(); 

    if (game.assetManager.update()) { 
     Gdx.app.log("gamelog", "LoadingScreen: before calling SplashScreen =" + (-800+(int)(loadingPercent*800*2)) + " getProgress" + game.assetManager.getProgress()); 
     game.setScreen(new SplashScreen(game)); 
    } 

    stage.act(delta); 
    stage.draw(); 

}

错误日志，bigBox显示器正常工作时我注释掉线“smallBox.setX（-800+（INT）（loadingPercent * 800 * 2））; // < ------问题点“。我还以为是浮/ INT问题，然而，根据logcat的（当行注释掉）：

11-01 22:03:29.261: I/awesomegame(24283): LoadingScreen: =-800 getProgress0.0 
11-01 22:03:29.301: D/memalloc(24283): /dev/pmem: Mapped buffer base:0x52e94000 size:4255744 offset:3485696 fd:67 
11-01 22:03:29.301: I/awesomegame(24283): LoadingScreen: =-800 getProgress0.0 
11-01 22:03:29.311: D/memalloc(24283): /dev/pmem: Mapped buffer base:0x533c7000 size:5025792 offset:4255744 fd:70 
11-01 22:03:29.321: I/awesomegame(24283): LoadingScreen: =-800 getProgress0.0 
11-01 22:03:29.331: I/awesomegame(24283): LoadingScreen: =-800 getProgress0.0 
... 
11-01 22:03:30.362: I/awesomegame(24283): LoadingScreen: =-38 getProgress0.5 
11-01 22:03:30.512: I/awesomegame(24283): LoadingScreen: =-34 getProgress0.5 
11-01 22:03:30.532: I/awesomegame(24283): LoadingScreen: =-31 getProgress0.5 
11-01 22:03:30.532: I/awesomegame(24283): LoadingScreen: =-28 getProgress0.5 
11-01 22:03:30.552: I/awesomegame(24283): LoadingScreen: =-25 getProgress0.5 
11-01 22:03:30.572: I/awesomegame(24283): LoadingScreen: =-23 getProgress0.5 
11-01 22:03:30.572: I/awesomegame(24283): LoadingScreen: =-21 getProgress0.5 
11-01 22:03:30.592: I/awesomegame(24283): LoadingScreen: =-19 getProgress0.5 
11-01 22:03:30.612: I/awesomegame(24283): LoadingScreen: =-17 getProgress0.5 
11-01 22:03:30.612: I/awesomegame(24283): LoadingScreen: =-15 getProgress0.5 
11-01 22:03:30.672: I/awesomegame(24283): LoadingScreen: =-14 getProgress0.5 
11-01 22:03:30.692: I/awesomegame(24283): LoadingScreen: =-12 getProgress0.5 
11-01 22:03:30.872: I/awesomegame(24283): LoadingScreen: =-11 getProgress0.5 
11-01 22:03:30.882: I/awesomegame(24283): LoadingScreen: before calling SplashScreen =-11 getProgress1.0

似乎工作公式是正确的。我一直在这个问题上坚持了几天，并不确定在哪里以及如何解决它。

非常感谢，任何帮助，非常感谢。

问候的Zii

来源

2013-11-01 Ziiiii

使用你的调试器来发现问题。 'smallBox.setX（-800 +（int）（lo ...'如果'smallBox'或'loadingPercent'为'null'只能抛出'NullPointerException'。'loadingPercent'实际上不能为'null'，因为它的因为'smallBox'必须是'null' – noone

谢谢你没有，你说得对，我刚刚测试过，似乎'smallBox'是空的。你有什么建议吗？我应该如何解决这个问题呢？它真的很重要'loadingPercent'是'float'或'Float'？有什么区别？ – Ziiiii

由给定的代码判断，'smallBox'不能是'null'，它曾经在' show（）'然后永远不会改变（至少在我能看到的代码中，所以问题必须在其他地方），是的，它有所不同，'float'不能为'null'，而'Float'假设你有'Float foo = null;'，那么下面两行将会抛出'NullPointerException'：1）'Float bar = foo * 10;'2）'float bar =（float）foo;' – noone

我发现那里的问题来自何处。在追踪每一步之后，似乎小型盒子正在放置在LoadingScreen和AbstractScreen之间。解决方案是添加“这个”。作为小盒子的前缀。

无论如何，谢谢你的帮助，@noone

来源

2013-11-12 05:37:37 Ziiiii

Actor.setx =致命的例外：GLThread 2967

回答

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