运行我的项目时出现此错误:

05-28 07:52:04.314: E/AndroidRuntime(1391): FATAL EXCEPTION: UpdateThread 
05-28 07:52:04.314: E/AndroidRuntime(1391): Process: com.brekol, PID: 1391 
05-28 07:52:04.314: E/AndroidRuntime(1391): java.lang.UnsatisfiedLinkError: Couldn't load andenginephysicsbox2dextension from loader dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.brekol-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.brekol-1, /system/lib]]]: findLibrary returned null 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at java.lang.Runtime.loadLibrary(Runtime.java:358) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at java.lang.System.loadLibrary(System.java:526) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.extension.physics.box2d.PhysicsWorld.<clinit>(PhysicsWorld.java:35) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at com.brekol.scene.GameScene.createPhysics(GameScene.java:119) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at com.brekol.scene.GameScene.createScene(GameScene.java:74) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at com.brekol.scene.BaseScene.<init>(BaseScene.java:30) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at com.brekol.scene.GameScene.<init>(GameScene.java:44) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at com.brekol.manager.SceneManager$1.onTimePassed(SceneManager.java:75) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.handler.timer.TimerHandler.onUpdate(TimerHandler.java:94) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.handler.UpdateHandlerList.onUpdate(UpdateHandlerList.java:47) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.Engine.onUpdateUpdateHandlers(Engine.java:618) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.Engine.onUpdate(Engine.java:605) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.LimitedFPSEngine.onUpdate(LimitedFPSEngine.java:57) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.Engine.onTickUpdate(Engine.java:568) 
05-28 07:52:04.314: E/AndroidRuntime(1391):     at org.andengine.engine.Engine$UpdateThread.run(Engine.java:858) 

请帮助我!!!为什么这个错误？？

请您参考如下方法:

您错过了本地库的导入，检查 https://github.com/nicolasgramlich/AndEngineExamples详情 ;)