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tried all 3 constructors but it always throws java.lang.UnsatisfiedLinkError.

public void onResume() {;
    super.onResume();    
    boolean r = OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_5,this, mLoaderCallback);
    Log.e("MJPG", "opencv onboard : " + r);
    BackgroundSubtractorMOG bgm0 = new BackgroundSubtractorMOG() ;
}

07-01 10:43:50.282: W/dalvikvm(6889): No implementation found for native Lorg/opencv/video/BackgroundSubtractorMOG;.BackgroundSubtractorMOG_0 ()J
07-01 10:43:50.292: E/AndroidRuntime(6889): FATAL EXCEPTION: main
07-01 10:43:50.292: E/AndroidRuntime(6889): java.lang.UnsatisfiedLinkError: BackgroundSubtractorMOG_0
07-01 10:43:50.292: E/AndroidRuntime(6889):     at org.opencv.video.BackgroundSubtractorMOG.BackgroundSubtractorMOG_0(Native Method)
07-01 10:43:50.292: E/AndroidRuntime(6889):     at org.opencv.video.BackgroundSubtractorMOG.<init>(BackgroundSubtractorMOG.java:39)

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public void onResume() {;
    super.onResume();
    boolean r = OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_5,this, mLoaderCallback);
    Log.e("MJPG", "opencv onboard : " + r);
    BackgroundSubtractorMOG bgm1 = new BackgroundSubtractorMOG(1000,3,1.0) ;
}



07-01 10:41:56.742: E/MJPG(6828): opencv onboard : true
07-01 10:41:56.742: W/dalvikvm(6828): No implementation found for native Lorg/opencv/video/BackgroundSubtractorMOG;.BackgroundSubtractorMOG_2 (IID)J
07-01 10:41:56.752: E/AndroidRuntime(6828): FATAL EXCEPTION: main
07-01 10:41:56.752: E/AndroidRuntime(6828): java.lang.UnsatisfiedLinkError: BackgroundSubtractorMOG_2
07-01 10:41:56.752: E/AndroidRuntime(6828):     at org.opencv.video.BackgroundSubtractorMOG.BackgroundSubtractorMOG_2(Native Method)
07-01 10:41:56.752: E/AndroidRuntime(6828):     at org.opencv.video.BackgroundSubtractorMOG.<init>(BackgroundSubtractorMOG.java:83)

--------------------------------------------------------------------------------

public void onResume() {;
    super.onResume();
    boolean r = OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_5,this, mLoaderCallback);
    Log.e("MJPG", "opencv onboard : " + r);
    BackgroundSubtractorMOG bgm2 = new BackgroundSubtractorMOG(1000,3,1.0,0.6) ;
}


07-01 10:45:25.682: E/MJPG(6949): opencv onboard : true
07-01 10:45:25.682: W/dalvikvm(6949): No implementation found for native Lorg/opencv/video/BackgroundSubtractorMOG;.BackgroundSubtractorMOG_1 (IIDD)J
07-01 10:45:25.692: E/AndroidRuntime(6949): FATAL EXCEPTION: main
07-01 10:45:25.692: E/AndroidRuntime(6949): java.lang.UnsatisfiedLinkError: BackgroundSubtractorMOG_1
07-01 10:45:25.692: E/AndroidRuntime(6949):     at org.opencv.video.BackgroundSubtractorMOG.BackgroundSubtractorMOG_1(Native Method)
07-01 10:45:25.692: E/AndroidRuntime(6949):     at org.opencv.video.BackgroundSubtractorMOG.<init>(BackgroundSubtractorMOG.java:64)
07-01 10:45:25.692: E/AndroidRuntime(6949):     at com.example.blank.MainActivity.onResume(MainActivity.java:54)