скомпилируйте dlib и opencv с android ndk

bendaf 07/28/2017. 1 answers, 983 views
android android build android-ndk dlib android-studio-2.3

Я разработчик Android, но я новичок в Android NDK, пожалуйста, помогите, или скажите мне, что еще вам нужно / как бы вы попытались решить этот тип проблемы.

Я использовал этот пример dlib для Android и официальную библиотеку opencv для android, и я хотел бы объединить их в одном приложении. Когда я пытаюсь построить проект, я получаю следующую ошибку:

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':openCVSamplefacedetection:externalNativeBuildDebug'.
> Build command failed.
  Error while executing process /home/feli/Android/Sdk/ndk-bundle/ndk-build with arguments {NDK_PROJECT_PATH=null APP_BUILD_SCRIPT=/home/feli/Development/android/test/face-detection/openCVSamplefacedetection/src/main/jni/Android.mk NDK_APPLICATION_MK=/home/feli/Development/android/test/face-detection/openCVSamplefacedetection/src/main/jni/Application.mk APP_ABI=mips64 NDK_ALL_ABIS=mips64 NDK_DEBUG=1 APP_PLATFORM=android-21 NDK_OUT=/home/feli/Development/android/test/face-detection/openCVSamplefacedetection/build/intermediates/ndkBuild/debug/obj NDK_LIBS_OUT=/home/feli/Development/android/test/face-detection/openCVSamplefacedetection/build/intermediates/ndkBuild/debug/lib /home/feli/Development/android/test/face-detection/openCVSamplefacedetection/build/intermediates/ndkBuild/debug/obj/local/mips64/libdetection_based_tracker.so}
  [mips64] Compile++      : detection_based_tracker <= DetectionBasedTracker_jni.cpp
  [mips64] Prebuilt       : libopencv_java3.so <= /home/feli/Android/openCV/OpenCV-android-sdk/sdk/native/jni/../libs/mips64/
  [mips64] SharedLibrary  : libdetection_based_tracker.so
  /home/feli/Development/android/test/face-detection/openCVSamplefacedetection/build/intermediates/ndkBuild/debug/obj/local/mips64/objs-debug/detection_based_tracker/DetectionBasedTracker_jni.o: In function `dlib_check_consistent_assert_usage':
  /home/feli/Development/android/test/face-detection/openCVSamplefacedetection/src/main/jni/dlib/dlib/threads/threads_kernel_shared.h:44: undefined reference to `USER_ERROR__missing_dlib_all_source_cpp_file__OR__inconsistent_use_of_DEBUG_or_ENABLE_ASSERTS_preprocessor_directives_'
  clang++: error: linker command failed with exit code 1 (use -v to see invocation)
  make: *** [/home/feli/Development/android/test/face-detection/openCVSamplefacedetection/build/intermediates/ndkBuild/debug/obj/local/mips64/libdetection_based_tracker.so] Error 1


* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. 

Моим первым предположением было то, что я не включил source.cpp в мой Android.mk, но размещение его в файлах src не решило проблему. Вот мой Android.mk:

LOCAL_PATH := $(call my-dir)

## Build dlib to static library
include $(CLEAR_VARS)
LOCAL_MODULE := dlib
LOCAL_C_INCLUDES := $(LOCAL_PATH)/dlib

LOCAL_SRC_FILES += \
                $(LOCAL_PATH)/dlib/dlib/all/source.cpp \
                $(LOCAL_PATH)/dlib//dlib/threads/threads_kernel_shared.cpp \
                $(LOCAL_PATH)/dlib/dlib/entropy_decoder/entropy_decoder_kernel_2.cpp \
                $(LOCAL_PATH)/dlib/dlib/base64/base64_kernel_1.cpp \
                $(LOCAL_PATH)/dlib/dlib/threads/threads_kernel_1.cpp \
                $(LOCAL_PATH)/dlib/dlib/threads/threads_kernel_2.cpp

LOCAL_EXPORT_C_INCLUDES := $(LOCAL_C_INCLUDES)
include $(BUILD_STATIC_LIBRARY)

# Build opencv
include $(CLEAR_VARS)
OPENCVROOT := ~/Android/openCV/OpenCV-android-sdk
OPENCV_CAMERA_MODULES:=on
OPENCV_INSTALL_MODULES:=on
OPENCV_LIB_TYPE := SHARED
include ${OPENCVROOT}/sdk/native/jni/OpenCV.mk

LOCAL_MODULE     := detection_based_tracker
LOCAL_C_INCLUDES += $(LOCAL_PATH)
LOCAL_SRC_FILES  := DetectionBasedTracker_jni.cpp

LOCAL_LDLIBS     += -lm -llog -ldl -lz -ljnigraphics
LOCAL_CPPFLAGS += -fexceptions -frtti -std=c++11

# LOCAL_STATIC_LIBRARIES += dlib

include $(BUILD_SHARED_LIBRARY) 

Может быть, NDK_PROJECT_PATH=null в NDK_PROJECT_PATH=null ? Чем две библиотеки строятся отдельно? Или в чем еще может быть проблема? Я много пытался изменить Android.mk, но он работает, для меня загадка. Любая помощь или мнение было бы полезно.

EDIT:

Когда я закомментировал LOCAL_STATIC_LIBRARIES += dlib , я получил следующее исключение:

Build command failed.
  Error while executing process /home/feli/Android/Sdk/ndk-bundle/ndk-build with arguments {NDK_PROJECT_PATH=null APP_BUILD_SCRIPT=/home/feli/Development/android/test/face-detection/openCVSamplefacedetection/src/main/jni/Android.mk NDK_APPLICATION_MK=/home/feli/Development/android/test/face-detection/openCVSamplefacedetection/src/main/jni/Application.mk APP_ABI=mips64 NDK_ALL_ABIS=mips64 NDK_DEBUG=1 APP_PLATFORM=android-21 NDK_OUT=/home/feli/Development/android/test/face-detection/openCVSamplefacedetection/build/intermediates/ndkBuild/debug/obj NDK_LIBS_OUT=/home/feli/Development/android/test/face-detection/openCVSamplefacedetection/build/intermediates/ndkBuild/debug/lib /home/feli/Development/android/test/face-detection/openCVSamplefacedetection/build/intermediates/ndkBuild/debug/obj/local/mips64/libdetection_based_tracker.so}
  [mips64] Compile++      : detection_based_tracker <= DetectionBasedTracker_jni.cpp
  [mips64] Compile++      : dlib <= source.cpp
  In file included from /home/feli/Development/android/test/face-detection/openCVSamplefacedetection/src/main/jni/dlib/dlib/all/source.cpp:76:
  In file included from /home/feli/Development/android/test/face-detection/openCVSamplefacedetection/src/main/jni/dlib/dlib/all/../gui_widgets/fonts.cpp:14:
  /home/feli/Development/android/test/face-detection/openCVSamplefacedetection/src/main/jni/dlib/dlib/all/../gui_widgets/nativefont.h:27:10: fatal error: 'X11/Xlib.h' file not found
  #include            ^~~~~~~~~~~~
  1 error generated.
  make: *** [/home/feli/Development/android/test/face-detection/openCVSamplefacedetection/build/intermediates/ndkBuild/debug/obj/local/mips64/objs-debug/dlib//home/feli/Development/android/test/face-detection/openCVSamplefacedetection/src/main/jni/dlib/dlib/all/source.o] Error 1 

1 Answers


Alex Cohn 07/31/2017.

dlib использует cmake , и это не тривиальная установка. ndk-build профессионалу может потребоваться много времени для подготовки ndk-build для этой библиотеки.

Я предлагаю вам собрать свою нативную библиотеку с помощью cmake , а не ndk-build . Вы можете найти пример нативной библиотеки, которая использует OpenCv на GitHub .

Кроме того, я предлагаю вам начать с abiFilters настроенного только на один наиболее важный ABI, и только когда вы увидите, что все работает для вас, вы можете построить свой проект для других ABI. Помните, что для некоторых библиотек портирование на все ABI может быть сложным. И если у вас нет платформы для выполнения хотя бы краткой проверки работоспособности какого-либо ABI, нет смысла создавать ее.


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