AndEngine創建一個矩形崩潰的應用程序

這是我第一次使用AndEngine，當我嘗試創建一個矩形時，它在該行上崩潰。我正在嘗試使用矩形按鈕將播放器向左或向右移動。我在這裏找到了一個按鈕教程：http://www.matim-dev.com/creating-leftright-game-controller-buttons.html。我甚至嘗試在場景中使用觸摸事件，而不是在那裏墜毀。我搜索了很長時間的答案，但仍然無法找到答案，所以現在我完全陷入困境。任何幫助將不勝感激。AndEngine創建一個矩形崩潰的應用程序

HUD controller = new HUD(); 
    Rectangle left = new Rectangle(0, 0, (screenWidth/2), (screenHeight), getVertexBufferObjectManager()) // It crashes right on this line. 
    { 
     @Override 
     public boolean onAreaTouched(TouchEvent touchEvent, float X, float Y) 
     { 
      // Move left 
      if (touchEvent.isActionDown()) 
      { 
       isLeftTouched = true; 
      } 
      if (touchEvent.isActionUp()) 
      { 
       isLeftTouched = false; 
       player1.stop(); 
      } 
      return true; 
     } 

     @Override 
     public void onManagedUpdate(float secondsElapsed) 
     { 
      if (isLeftTouched) 
      { 
       // Execute your actions. 
       player1.moveLeft(); 

      } 
      super.onManagedUpdate(secondsElapsed); 
     } 
    }; 

    Rectangle right = new Rectangle(screenWidth/2, 0, screenWidth/2, screenHeight, getVertexBufferObjectManager()) 
    { 
     @Override 
     public boolean onAreaTouched(TouchEvent touchEvent, float X, float Y) 
     { 
      // Move right 
      if (touchEvent.isActionDown()) 
      { 
       isRightTouched = true; 
      } 
      if (touchEvent.isActionUp()) 
      { 
       isRightTouched = false; 
       player1.stop(); 
      } 
      return true; 
     } 

     @Override 
     public void onManagedUpdate(float secondsElapsed) 
     { 
      if (isRightTouched) 
      { 
       // Execute your actions. 
       player1.moveRight(); 
      } 
      super.onManagedUpdate(secondsElapsed); 
     } 
    }; 

    controller.registerTouchArea(left); 
    controller.registerTouchArea(right); 
    controller.attachChild(left); 
    controller.attachChild(right); 

    camera.setHUD(controller);

這裏是logcat的：

E/AndroidRuntime(2440): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.teej1410.glider/ com.teej1410.glider.MainActivity}: java.lang.NullPointerException 
E/AndroidRuntime(2440): at com.teej1410.glider.MainActivity.createControllers(MainActivity.java:169) 
E/AndroidRuntime(2440): at com.teej1410.glider.MainActivity.onCreateOther(MainActivity.java:132) 
E/AndroidRuntime(2440): at com.teej1410.glider.MainActivity.onCreateEngineOptions(MainActivity.java: 51) 
W/ActivityManager( 434): Force finishing

來源

2013-08-04 teej

logcat，plz .... – VenomVendor

我固定它。我有一個單獨的方法創建矩形，我打電話太早。

來源

2013-08-04 16:14:07 teej

AndEngine創建一個矩形崩潰的應用程序

回答

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