Opencv for Android SDK on Visual studio no such file or directory: 'libopencv_core.a'

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Hi, I try to creat android dynamic library on VS with Opencv Android SDK .Im new so I can make fundemantal mistake about this. I extract Android SDK file ...I give path Additional Include Directory ->>> "OpenCV-android-sdk\sdk\native\jni\include" and Additional Library Directories->>>>>>>"C:\OpenCV-android-sdk\sdk\native\libs\x86" finally I Additinoal dependencies ->>>>libopencv_core.a libopencv_calib3d.a libopencv_features2d.a libopencv_flann.a libopencv_highgui.a libopencv_imgproc.a libopencv_objdetect.a libopencv_video.a libopencv_videoio.a

but it gives error: no such file or directory: 'libopencv_core.a' for each *.a dependencies?????