如何将Android项目与libandroid和Cmake联系起来？ < >我有C++支持的Android项目。在我的项目中，当试图构建C++代码时，有一些未定义的引用，在回答了我的第一个问题之后，这里的问题是什么，我找不到一个方法来做。< /p> < p>如果你有类似的cFube： cmake_minimum_required(VERSION 3.4.1) # OpenCV stuff include_directories(D:\\opencv-3.2.0-android-sdk\\OpenCV-android-sdk\\sdk\\native\\jni\\include) add_library( lib_opencv SHARED IMPORTED ) set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libopencv_java3.so) add_compile_options(-std=c++11) # Creates and names a library, sets it as either STATIC # or SHARED, and provides the relative paths to its source code. # You can define multiple libraries, and CMake builds them for you. # Gradle automatically packages shared libraries with your APK. add_library( # Sets the name of the library. native-lib # Sets the library as a shared library. SHARED # Provides a relative path to your source file(s). src/main/cpp/native-lib.cpp) # Searches for a specified prebuilt library and stores the path as a # variable. Because CMake includes system libraries in the search path by # default, you only need to specify the name of the public NDK library # you want to add. CMake verifies that the library exists before # completing its build. find_library( # Sets the name of the path variable. log-lib # Specifies the name of the NDK library that # you want CMake to locate. log ) # Specifies libraries CMake should link to your target library. You # can link multiple libraries, such as libraries you define in the # build script, prebuilt third-party libraries, or system libraries. target_link_libraries( # Specifies the target library. native-lib -ljnigraphics lib_opencv # Links the target library to the log library # included in the NDK. ${log-lib} ) target_link_libraries( # Specifies the target library. native-lib -ljnigraphics -landroid # Add this. lib_opencv # Links the target library to the log library # included in the NDK. ${log-lib} )

只需将零件更改为如下所示：

cmake_minimum_required(VERSION 3.4.1)

# OpenCV stuff
include_directories(D:\\opencv-3.2.0-android-sdk\\OpenCV-android-sdk\\sdk\\native\\jni\\include)
add_library( lib_opencv SHARED IMPORTED )
set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libopencv_java3.so)
add_compile_options(-std=c++11)

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.

add_library( # Sets the name of the library.
             native-lib

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             src/main/cpp/native-lib.cpp)

# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log )

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in the
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
                       native-lib
                       -ljnigraphics
                       lib_opencv

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )

target_link_libraries( # Specifies the target library.
                       native-lib
                       -ljnigraphics
                       -landroid # Add this.
                       lib_opencv

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )

---

如果您有如下所示的Cmake：

cmake_minimum_required(VERSION 3.4.1)

# OpenCV stuff
include_directories(D:\\opencv-3.2.0-android-sdk\\OpenCV-android-sdk\\sdk\\native\\jni\\include)
add_library( lib_opencv SHARED IMPORTED )
set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libopencv_java3.so)
add_compile_options(-std=c++11)

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.

add_library( # Sets the name of the library.
             native-lib

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             src/main/cpp/native-lib.cpp)

# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log )

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in the
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
                       native-lib
                       -ljnigraphics
                       lib_opencv

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )

target_link_libraries( # Specifies the target library.
                       native-lib
                       -ljnigraphics
                       -landroid # Add this.
                       lib_opencv

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )

只需将零件更改为如下所示：

cmake_minimum_required(VERSION 3.4.1)

# OpenCV stuff
include_directories(D:\\opencv-3.2.0-android-sdk\\OpenCV-android-sdk\\sdk\\native\\jni\\include)
add_library( lib_opencv SHARED IMPORTED )
set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libopencv_java3.so)
add_compile_options(-std=c++11)

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.

add_library( # Sets the name of the library.
             native-lib

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             src/main/cpp/native-lib.cpp)

# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log )

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in the
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
                       native-lib
                       -ljnigraphics
                       lib_opencv

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )

target_link_libraries( # Specifies the target library.
                       native-lib
                       -ljnigraphics
                       -landroid # Add this.
                       lib_opencv

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )

---

你试过你另一个问题中的建议了吗？@DanAlbert我不知道如何开始这个建议。你试过你另一个问题中的建议了吗？@DanAlbert我不知道如何开始这个建议。