[NDK] so 포함한 apk가 so loading 실패 (3)

system app으로 사용하기 위해 다음과 같이 path를 변경함.

app/build.gradle

sourceSets {

   main{

   // let gradle pack the shared library into apk

      //jniLibs.srcDirs = ['src/main/cpp/libtest']

      jniLibs.srcDirs = ['src/libs']

   }

}

"app/src/main/cpp/CMakeLists.txt"

cmake_minimum_required(VERSION 3.4.1)

#빌드된 library가 생성 될 경로를 지정

set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/../../../libs/")

add_library(test_jni SHARED IMPORTED)



set_target_properties(

                    test_jni



                    PROPERTIES IMPORTED_LOCATION



                    ${CMAKE_SOURCE_DIR}/../../../libs//libtest/${ANDROID_ABI}/libtest_jni.so )



#include_directories(${CMAKE_SOURCE_DIR}/libtest/include/)

include_directories(${CMAKE_SOURCE_DIR}/../../../libs/libtest/include/)



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 )



target_link_libraries(

                       native-lib



                       test_jni



                       ${log-lib}  )

   

해당 앱에서만 so file을 사용하기 위해 Android.mk를 수정, LOCAL_PREBUILT_JNI_LIBS_arm 변수 library path를 지정한다.

   

LOCAL_PREBUILT_JNI_LIBS_arm := app/libs/libnative-lib.so \

                                app/libs/libtest/armeabi-v7a/libtest_jni.so

빌드 결과 확인 

./priv-app/NDKSample/lib/arm/libtest_jni.so

./priv-app/NDKSample/lib/arm/libnative-lib.so

참조:

https://stackoverflow.com/questions/3742090/custom-directory-for-cmake-library-output

https://developer.android.com/ndk/guides/cmake