OpenCv与Android studio 2.2+一起使用带有cmake的新gradle-未定义引用

Question

 cmake_minimum_required(VERSION 3.4.1)
 add_library( native-lib
         SHARED
         src/main/cpp/native-lib.cpp )
include_directories(E\:\\OpenCVSdk\\sdk\\native\\jni\\include )
find_library( log-lib log )
target_link_libraries(native-lib ${log-lib} )

和我的Gradle构建文件

 {    apply plugin: 'com.android.application'

 android {

compileSdkVersion 24
buildToolsVersion "24.0.2"
defaultConfig {
    applicationId "viki.opecvtry2csupport"
    minSdkVersion 16
    targetSdkVersion 24
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"



    externalNativeBuild {
        cmake {
            cppFlags ""

        }
    }
}

Answer 1

我通过将“lib_opencv”lib添加到target_link_libraries来解决我的问题

target_link_libraries(
                   native-lib lib_opencv #Just add the lib_opencv
                   ${log-lib} )

别忘了把Gradle链接到本地图书馆

我的完整cmakelist.txt

cmake_minimum_required(VERSION 3.4.1)

add_library( native-lib
             SHARED
             src/main/cpp/native-lib.cpp )

find_library( log-lib
              log )

target_link_libraries(native-lib lib_opencv
                       ${log-lib} )

set(CMAKE_VERBOSE_MAKEFILE on)
add_library(lib_opencv SHARED IMPORTED)
set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION /PROJECT_PATH/openCVLibrary320/src/main/jniLibs/${ANDROID_ABI}/libopencv_java3.so)

include_directories(/OpenCV-android-sdk/sdk/native/jni/include)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")