java.lang.NoClassDefFoundError: org.opencv.engine.OpenCVEngineInterface$Stub

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Hi Friends Am working a new camera application which is using the OpenCv and i have created the new Camera which is extending the JavaCameraView Now am getting this below Error I dono why it's happening.If any one know please post your answer soon

06-20 10:20:08.681: E/AndroidRuntime(21915): java.lang.NoClassDefFoundError: org.opencv.engine.OpenCVEngineInterface$Stub
06-20 10:20:08.681: E/AndroidRuntime(21915):    at org.opencv.android.AsyncServiceHelper$1.onServiceConnected(AsyncServiceHelper.java:160)
06-20 10:20:08.681: E/AndroidRuntime(21915):    at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1097)
06-20 10:20:08.681: E/AndroidRuntime(21915):    at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1114)
06-20 10:20:08.681: E/AndroidRuntime(21915):    at android.os.Handler.handleCallback(Handler.java:615)
06-20 10:20:08.681: E/AndroidRuntime(21915):    at android.os.Handler.dispatchMessage(Handler.java:92)
06-20 10:20:08.681: E/AndroidRuntime(21915):    at android.os.Looper.loop(Looper.java:137)
06-20 10:20:08.681: E/AndroidRuntime(21915):    at android.app.ActivityThread.main(ActivityThread.java:4797)
06-20 10:20:08.681: E/AndroidRuntime(21915):    at java.lang.reflect.Method.invokeNative(Native Method)
06-20 10:20:08.681: E/AndroidRuntime(21915):    at java.lang.reflect.Method.invoke(Method.java:511)
06-20 10:20:08.681: E/AndroidRuntime(21915):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
06-20 10:20:08.681: E/AndroidRuntime(21915):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
06-20 10:20:08.681: E/AndroidRuntime(21915):    at dalvik.system.NativeStart.main(Native Method)