Build error

[MenaRaafat]

After following the instructions in the readme file, I still can not successfully build the project.

When trying to sync with Gradle I get: Unsupported Modules detected Compilation is not supported for following modules: openCVLibrary331, openCVLibrary300, AndroidFaceDetectOpenCV, app, opencv_android_sample, openCVLibrary343. Unfortunately you can't have non-Gradle Java modules and Android-Gradle modules in one project.

When trying to build I get: Build command failed. Error while executing process AppData\Local\Android\Sdk\cmake\3.6.4111459\bin\cmake.exe with arguments {--build D:\AndroidFaceDetectOpenCV-master\app.externalNativeBuild\cmake\debug\x86_64 --target native-lib}

ninja: error: '../../../../src/main/jniLibs/x86_64/libopencv_java3.so', needed by '../../../../build/intermediates/cmake/debug/obj/x86_64/libnative-lib.so', missing and no known rule to make it