由于今天太晚了，详细笔记有空再记。
要添加的有ANDROID_ABI，这个根据需求添加自己需要的ABI
然后是ANDROID_STL,因为gunstl已经不被支持，这里使用c++_shared或c++_static都可以。
然后是ANDROID_STL,因为gunstl已经不被支持，这里使用c++_shared或c++_static都可以。
添加完后点击“Configure”按钮，选择mingw作为生成工具，然后选择使用工具链交叉编译，点击“Next”。
D:android-ndk-r17cuildcmakeandroid.toolchain.cmake
指定CMAKE_MAKE_PROGRAM
C:/msys64/mingw64/bin/mingw32-make.exe
输出配置信息：
General configuration for OpenCV 3.4.9 ===================================== Version control: unknown Platform: Timestamp: 2020-04-01T14:38:54Z Host: Windows 10.0.18363 AMD64 Target: Android 1 aarch64 CMake: 3.16.0 CMake generator: MinGW Makefiles CMake build tool: C:/msys64/mingw64/bin/mingw32-make.exe Configuration: Release CPU/HW features: Baseline: NEON FP16 required: NEON disabled: VFPV3 C/C++: Built as dynamic libs?: NO C++11: YES C++ Compiler: D:/android-ndk-r17c/toolchains/llvm/prebuilt/windows-x86_64/bin/clang++.exe (ver 3.8) C++ flags (Release): -isystem D:/android-ndk-r17c/sysroot/usr/include/aarch64-linux-android -D__ANDROID_API__=21 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -Wa,--noexecstack -Wformat -Werror=format-security -std=c++11 -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Winconsistent-missing-override -Wno-delete-non-virtual-dtor -Wno-unnamed-type-template-args -Wno-comment -fdiagnostics-show-option -Qunused-arguments -fvisibility=hidden -fvisibility-inlines-hidden -O2 -DNDEBUG -DNDEBUG C++ flags (Debug): -isystem D:/android-ndk-r17c/sysroot/usr/include/aarch64-linux-android -D__ANDROID_API__=21 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -Wa,--noexecstack -Wformat -Werror=format-security -std=c++11 -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Winconsistent-missing-override -Wno-delete-non-virtual-dtor -Wno-unnamed-type-template-args -Wno-comment -fdiagnostics-show-option -Qunused-arguments -fvisibility=hidden -fvisibility-inlines-hidden -O0 -fno-limit-debug-info -DDEBUG -D_DEBUG C Compiler: D:/android-ndk-r17c/toolchains/llvm/prebuilt/windows-x86_64/bin/clang.exe C flags (Release): -isystem D:/android-ndk-r17c/sysroot/usr/include/aarch64-linux-android -D__ANDROID_API__=21 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -Wa,--noexecstack -Wformat -Werror=format-security -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Winconsistent-missing-override -Wno-delete-non-virtual-dtor -Wno-unnamed-type-template-args -Wno-comment -fdiagnostics-show-option -Qunused-arguments -fvisibility=hidden -fvisibility-inlines-hidden -O2 -DNDEBUG -DNDEBUG C flags (Debug): -isystem D:/android-ndk-r17c/sysroot/usr/include/aarch64-linux-android -D__ANDROID_API__=21 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -Wa,--noexecstack -Wformat -Werror=format-security -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Winconsistent-missing-override -Wno-delete-non-virtual-dtor -Wno-unnamed-type-template-args -Wno-comment -fdiagnostics-show-option -Qunused-arguments -fvisibility=hidden -fvisibility-inlines-hidden -O0 -fno-limit-debug-info -DDEBUG -D_DEBUG Linker flags (Release): -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a -nostdlib++ --sysroot D:/android-ndk-r17c/platforms/android-21/arch-arm64 -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -LD:/android-ndk-r17c/sources/cxx-stl/llvm-libc++/libs/arm64-v8a -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now Linker flags (Debug): -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a -nostdlib++ --sysroot D:/android-ndk-r17c/platforms/android-21/arch-arm64 -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -LD:/android-ndk-r17c/sources/cxx-stl/llvm-libc++/libs/arm64-v8a -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now ccache: NO Precompiled headers: NO Extra dependencies: z dl m log 3rdparty dependencies: libcpufeatures ittnotify libprotobuf libjpeg-turbo libwebp libpng libtiff libjasper IlmImf quirc tegra_hal OpenCV modules: To be built: calib3d core dnn features2d flann highgui imgcodecs imgproc ml objdetect photo shape stitching superres ts video videoio videostab Disabled: world Disabled by dependency: - Unavailable: cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev java js python2 python3 viz Applications: tests perf_tests Documentation: NO Non-free algorithms: NO Android NDK: D:/android-ndk-r17c (ver 17.2.4988734) Android ABI: arm64-v8a NDK toolchain: aarch64-linux-android-clang STL type: c++_static Native API level: 21 Android SDK: not used, projects are not built GUI: Media I/O: ZLib: z (ver 1.2.3) JPEG: build-libjpeg-turbo (ver 2.0.2-62) WEBP: build (ver encoder: 0x020e) PNG: build (ver 1.6.37) TIFF: build (ver 42 - 4.0.10) JPEG 2000: build (ver 1.900.1) OpenEXR: build (ver 2.3.0) HDR: YES SUNRASTER: YES PXM: YES Video I/O: Parallel framework: pthreads Trace: YES (with Intel ITT) Other third-party libraries: Custom HAL: YES (carotene (ver 0.0.1)) Protobuf: build (3.5.1) Python (for build): D:/Anaconda3/envs/py35/python.exe Java: export all functions ant: NO Java wrappers: NO Java tests: NO Install to: D:/Program Files (x86)/opencv-3.4.9/sources/build_android64/install ----------------------------------------------------------------- Configuring done
然后点击Generate
执行mingw64.exe 进入D:Program Files (x86)opencv-3.4.9sourcesuild_android64目录下编译命令：
mingw32-make
安装：
mingw32-make install
安装完成后在install路径下文件夹结构：
D:. ├─apk └─sdk ├─etc │ ├─haarcascades │ ├─lbpcascades │ └─licenses └─native ├─3rdparty │ └─libs │ └─arm64-v8a ├─jni │ ├─abi-arm64-v8a │ └─include │ ├─opencv │ └─opencv2 │ ├─calib3d │ ├─core │ │ ├─cuda │ │ │ └─detail │ │ ├─detail │ │ ├─hal │ │ ├─opencl │ │ │ └─runtime │ │ │ └─autogenerated │ │ └─utils │ ├─dnn │ │ └─utils │ ├─features2d │ │ └─hal │ ├─flann │ ├─highgui │ ├─imgcodecs │ ├─imgproc │ │ ├─detail │ │ └─hal │ ├─ml │ ├─objdetect │ ├─photo │ ├─shape │ ├─stitching │ │ └─detail │ ├─superres │ ├─video │ ├─videoio │ └─videostab └─staticlibs └─arm64-v8a
参考博客：