Javacv Face Recognition in Android: dlopen failed: library libopencv_legacy.so not found

Question

I am trying face recognition in Android using JavaCV (google-code).

It is showing this error:

java.lang.UnsatisfiedLinkError: dlopen failed: library "../../lib/libopencv_legacy.so" not found

Other libraries like libopencv_highgui.so, libopencv_core.so, libopencv_contrib.so are working well, but when I add the code for face recognition it shows the error that I mentioned above.

Details:

• Android Studio: 3.1.3
• javaCV: 0.7
• ndk version v20

I put abiFilters in gradle as:

ndk{
   abiFilters "armeabi","armeabi-v7a"
}

Stored all *.so files in "armeabi" and "armeabi-v7a" directories

When I try to add the Face Recognizer code:

FaceRecognizer faceRecognizer = createFisherFaceRecognizer();

the it shows this error:

java.lang.UnsatisfiedLinkError: dlopen failed: library "../../lib/libopencv_legacy.so" not found
 Caused by: java.lang.UnsatisfiedLinkError: dlopen failed: library "../../lib/libopencv_legacy.so" not found