I have built OpenCV for android on Windows using CMAKE, MINGW and NVIDIA Android NDK.
After I `make` it and `make install` it, I found the following folders:
install:
-apk:
-sdk:
--etc
--native
there is no `java` folder inside the `sdk` folder. `libopencv_java3.so` is also mssing. What did I miss?
EDIT (CMake output):
Detected version of GNU GCC: 49 (409)
FP16: Compiler support is available
Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)
To enable PlantUML support, set PLANTUML_JAR environment variable or pass -DPLANTUML_JAR= option to cmake
Could NOT find PythonInterp: Found unsuitable version "2.7.13", but required is at least "3.4" (found C:/Python27/python.exe)
Could NOT find PythonInterp: Found unsuitable version "2.7.13", but required is at least "3.2" (found C:/Python27/python.exe)
Found apache ant 1.8.2: C:/NVPACK/apache-ant-1.8.2/bin/ant.bat
Assume that non-module dependency is available: z (for module opencv_core)
[OpenCV for Android SDK]: A new OpenGL Camera Bridge (CameraGLSurfaceView, CameraGLRendererBase, CameraRenderer, Camera2Renderer) is disabled, because ANDROID_SDK_TARGET (15) < 21
Sample example-tutorial-4-opencl is disabled, because ANDROID_OPENCL_SDK is not specified
General configuration for OpenCV 3.1.0-dev =====================================
Version control: 3.1.0-1661-gacaa1e1
Platform:
Timestamp: 2016-12-06T13:36:05Z
Host: Windows 10.0.10586 AMD64
Target: Android 1 armv7-a
CMake: 3.4.2
CMake generator: Unix Makefiles
CMake build tool: C:/PROGRA~2/GnuWin32/bin/make.exe
Configuration: Release
C/C++:
Built as dynamic libs?: NO
C++ Compiler: C:/NVPACK/android-ndk-r12b/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-g++.exe (ver 4.9)
C++ flags (Release): -fexceptions -frtti -fpic -Wno-psabi --sysroot=C:/NVPACK/android-ndk-r12b/platforms/android-9/arch-arm -funwind-tables -finline-limit=64 -fsigned-char -no-canonical-prefixes -march=armv7-a -mfloat-abi=softfp -mfpu=neon -fdata-sections -ffunction-sections -Wa,--noexecstack -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-comment -fdiagnostics-show-option -fomit-frame-pointer -mfp16-format=ieee -mfpu=neon -fvisibility=hidden -fvisibility-inlines-hidden -mfpu=neon-fp16 -mthumb -fomit-frame-pointer -fno-strict-aliasing -O3 -DNDEBUG -DNDEBUG
C++ flags (Debug): -fexceptions -frtti -fpic -Wno-psabi --sysroot=C:/NVPACK/android-ndk-r12b/platforms/android-9/arch-arm -funwind-tables -finline-limit=64 -fsigned-char -no-canonical-prefixes -march=armv7-a -mfloat-abi=softfp -mfpu=neon -fdata-sections -ffunction-sections -Wa,--noexecstack -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-comment -fdiagnostics-show-option -fomit-frame-pointer -mfp16-format=ieee -mfpu=neon -fvisibility=hidden -fvisibility-inlines-hidden -mfpu=neon-fp16 -marm -fno-omit-frame-pointer -fno-strict-aliasing -O0 -g -DDEBUG -D_DEBUG -O0 -DDEBUG -D_DEBUG
C Compiler: C:/NVPACK/android-ndk-r12b/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-gcc.exe
C flags (Release): -fexceptions -fpic -Wno-psabi --sysroot=C:/NVPACK/android-ndk-r12b/platforms/android-9/arch-arm -funwind-tables -finline-limit=64 -fsigned-char -no-canonical-prefixes -march=armv7-a -mfloat-abi=softfp -mfpu=neon -fdata-sections -ffunction-sections -Wa,--noexecstack -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 -Wno-narrowing -Wno-comment -fdiagnostics-show-option -fomit-frame-pointer -mfp16-format=ieee -mfpu=neon -fvisibility=hidden -mfpu=neon-fp16 -mthumb -fomit-frame-pointer -fno-strict-aliasing -O3 -DNDEBUG -DNDEBUG
C flags (Debug): -fexceptions -fpic -Wno-psabi --sysroot=C:/NVPACK/android-ndk-r12b/platforms/android-9/arch-arm -funwind-tables -finline-limit=64 -fsigned-char -no-canonical-prefixes -march=armv7-a -mfloat-abi=softfp -mfpu=neon -fdata-sections -ffunction-sections -Wa,--noexecstack -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 -Wno-narrowing -Wno-comment -fdiagnostics-show-option -fomit-frame-pointer -mfp16-format=ieee -mfpu=neon -fvisibility=hidden -mfpu=neon-fp16 -marm -fno-omit-frame-pointer -fno-strict-aliasing -O0 -g -DDEBUG -D_DEBUG -O0 -DDEBUG -D_DEBUG
Linker flags (Release): -Wl,--fix-cortex-a8 -Wl,--no-undefined -Wl,-allow-shlib-undefined -Wl,--gc-sections -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now
Linker flags (Debug): -Wl,--fix-cortex-a8 -Wl,--no-undefined -Wl,-allow-shlib-undefined -Wl,--gc-sections -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now
Precompiled headers: NO
Extra dependencies: z dl m log
3rdparty dependencies: libjpeg libwebp libpng libtiff libjasper IlmImf tegra_hal
OpenCV modules:
To be built: core flann imgproc ml photo video imgcodecs shape videoio highgui objdetect superres features2d calib3d java stitching videostab
Disabled: ts world
Disabled by dependency: -
Unavailable: cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev python2 viz
Android:
Android ABI: armeabi-v7a with NEON
STL type: gnustl_static
Native API level: android-9
SDK target: android-15
Android NDK: C:/NVPACK/android-ndk-r12b (toolchain: arm-linux-androideabi-4.9)
android tool: C:/NVPACK/android-sdk-windows/tools/android.bat (Android SDK Tools, revision 25.2.3.)
Google Play manager: NO
Android examples: YES
GUI:
GTK+: NO
GThread : NO
GtkGlExt: NO
OpenGL support: NO
VTK support: NO
Media I/O:
ZLib: z (ver 1.2.3)
JPEG: build (ver 90)
WEBP: build (ver 0.3.1)
PNG: build (ver 1.6.24)
TIFF: build (ver 42 - 4.0.2)
JPEG 2000: build (ver 1.900.1)
OpenEXR: build (ver 1.7.1)
GDAL: NO
GDCM: NO
Video I/O:
Parallel framework: pthreads
Other third-party libraries:
Use IPP: NO
Use Eigen: NO
Use Cuda: NO
Use OpenCL: YES
Use OpenVX: NO
Use custom HAL: YES (carotene (ver 0.0.1))
OpenCL:
Include path: C:/opencv/3rdparty/include/opencl/1.2
Use AMDFFT: NO
Use AMDBLAS: NO
Python 2:
Interpreter: (ver 2.7.12)
Python 3:
Interpreter: NO
Python (for build):
Java:
ant: C:/NVPACK/apache-ant-1.8.2/bin/ant.bat (ver 1.8.2)
Java wrappers: YES
Java tests: YES
Matlab: NO
Documentation:
Doxygen: NO
PlantUML: NO
Tests and samples:
Tests: NO
Performance tests: NO
C/C++ Examples: NO
Install path: C:/opencv/platforms/build_android_arm_new/install
cvconfig.h is in: C:/opencv/platforms/build_android_arm_new
-----------------------------------------------------------------
Configuring done
Generating done
**Edit:**
I am getting error while `make`ing the project:
Error copying file (if different) from "C:/opencv/platforms/build_android_arm_new/modules/java/gen/calib3d.cpp" to "C:/opencv/platforms/build_android_arm_new/jni/calib3d.cpp".
make[2]: *** [jni/calib3d.cpp] Error 1
make[1]: *** [modules/java/CMakeFiles/opencv_java.dir/all] Error 2
make: *** [all] Error 2
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