用Cocos2d lib开发Android游戏

我想用Cocos2d开发游戏开发。我正在按照教程http://dan.clarke.name/2011/04/how-to-make-a-simple-android-game-with-cocos2d/。我添加了外部的cocos2d-android.jar文件，但是当我运行示例应用程序，然后导致以下错误。请任何人帮助我。用Cocos2d lib开发Android游戏

04-18 13:09:50.783: E/AndroidRuntime(497): FATAL EXCEPTION: main 
04-18 13:09:50.783: E/AndroidRuntime(497): java.lang.NoClassDefFoundError: org.cocos2d.opengl.CCGLSurfaceView 
04-18 13:09:50.783: E/AndroidRuntime(497): at com.agv.Cocos2d.CoCos2dActivity.onCreate(CoCos2dActivity.java:24) 
04-18 13:09:50.783: E/AndroidRuntime(497): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
04-18 13:09:50.783: E/AndroidRuntime(497): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
04-18 13:09:50.783: E/AndroidRuntime(497): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
04-18 13:09:50.783: E/AndroidRuntime(497): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
04-18 13:09:50.783: E/AndroidRuntime(497): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
04-18 13:09:50.783: E/AndroidRuntime(497): at android.os.Handler.dispatchMessage(Handler.java:99) 
04-18 13:09:50.783: E/AndroidRuntime(497): at android.os.Looper.loop(Looper.java:123) 
04-18 13:09:50.783: E/AndroidRuntime(497): at android.app.ActivityThread.main(ActivityThread.java:4627) 
04-18 13:09:50.783: E/AndroidRuntime(497): at java.lang.reflect.Method.invokeNative(Native Method) 
04-18 13:09:50.783: E/AndroidRuntime(497): at java.lang.reflect.Method.invoke(Method.java:521) 
04-18 13:09:50.783: E/AndroidRuntime(497): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
04-18 13:09:50.783: E/AndroidRuntime(497): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
04-18 13:09:50.783: E/AndroidRuntime(497): at dalvik.system.NativeStart.main(Native Method)

来源

2012-04-18 saiful.agv.android