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Cross Compile

Configure​

build_opencv.sh
SCRIPT_DIR="$(cd $(dirname $0); pwd -P)"

OPENCV_VERSION=4.6.0
ANDROID_NATIVE_API_LEVEL=29
ANDROID_PLATFORM=android-${ANDROID_NATIVE_API_LEVEL}
ANDROID_ABI=arm64-v8a
NDK_VERSION=21.1.6352462
CMAKE_SYSTEM_VERSION=23

INSTALL_DIR=${SCRIPT_DIR}/../sdk
BUILD_DIR=${SCRIPT_DIR}/build

cmake \
  -DCMAKE_BUILD_TYPE=Release \
  -H${BUILD_DIR}/opencv-${OPENCV_VERSION} \
  -DCMAKE_TOOLCHAIN_FILE=${HOME}/Android/Sdk/ndk/${NDK_VERSION}/build/cmake/android.toolchain.cmake \
  -DANDROID_ABI=${ANDROID_ABI} \
  -DANDROID_SDK_ROOT=${HOME}/Android/Sdk \
  -DCMAKE_ANDROID_ARCH_ABI=${ANDROID_ABI} \
  -DANDROID_PLATFORM=${ANDROID_PLATFORM} \
  -DANDROID_NDK=${HOME}/Android/Sdk/ndk/${NDK_VERSION} \
  -DCMAKE_ANDROID_NDK=${HOME}/Android/Sdk/ndk/${NDK_VERSION} \
  -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
  -DCMAKE_MAKE_PROGRAM=${HOME}/Android/Sdk/cmake/3.18.1/bin/ninja \
  -DCMAKE_SYSTEM_VERSION=${CMAKE_SYSTEM_VERSION} \
  -DCMAKE_SYSTEM_NAME=Android \
  -DBUILD_LIST=core,improc,imgcodecs \
  -DBUILD_SHARED_LIBS=ON \
  -DBUILD_ANDROID_EXAMPLES=OFF \
  -DOPENCV_DISABLE_FILESYSTEM_SUPPORT=ON \
  -GNinja \
  ..

Build​

cmake --build . --target all
cmake --build . --target libprotobuf
cmake --build . --target quirc

Install​

cmake --install .

Usage​

CMakeLists.txt
find_package(OpenCV REQUIRED)

target_link_libraries(my-lib ${OpenCV_LIBS})