Question

我在构建应用程序时收到null UnsatisfiedLinkError。

我正在使用openssl和一些第三方库捕获手指并验证它们。

这是我的cmake文件

  # For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html

# Sets the minimum version of CMake required to build the native library.

cmake_minimum_required(VERSION 3.4.1)

# 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 )


             add_library(openssl SHARED IMPORTED)
             set_target_properties (openssl PROPERTIES IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/lib/libcrypto.so )
             set_target_properties (openssl PROPERTIES IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/lib/libssl.so )
             set_target_properties (openssl PROPERTIES IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/lib/libidkit.so )
             set_target_properties (openssl PROPERTIES IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/lib/libjnidispatch.so )
             set_target_properties (openssl PROPERTIES IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/lib/libMSO100.so )
             set_target_properties (openssl PROPERTIES IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/lib/libNativeMorphoSmartSDK_6.13.2.0-4.1.so )




# 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.

include_directories(openssl-armeabi-v7a/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 )

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

target_link_libraries( # Specifies the target library.
                       native-lib
                      ${CMAKE_CURRENT_SOURCE_DIR}/openssl-armeabi-v7a/lib/libcrypto.a
                      ${CMAKE_CURRENT_SOURCE_DIR}/openssl-armeabi-v7a/lib/libssl.a

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

这是在cmake中加载.so文件的正确方法，还是有任何加载.so文件的方法。帮助解决这个问题

Answer 1

您列出的每个 .so 文件都是一个单独的库。你必须给每个人一个单独的名字，例如

add_library(foo SHARED IMPORTED)
set_target_properties (foo PROPERTIES IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/lib/libcrypto.so )
add_library(prebuilt_ssl SHARED IMPORTED)
set_target_properties (prebuilt_ssl PROPERTIES IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/lib/libssl.so )
add_library(idkit SHARED IMPORTED)
set_target_properties (idkit PROPERTIES IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/lib/libidkit.so )

等等。如上所示，逻辑名称不一定与文件名相关。

如果你的 native-lib 依赖于其中一些，你可以使用这些名称：

target_link_libraries( # Specifies the target library.
    native-lib foo prebuilt_ssl
    # Links the target library to the log library
    # included in the NDK.
    log )

请注意，使用NDK，您不需要find_library来添加对android日志库的依赖。

您发布的CMake脚本中存在一些自相矛盾。您应该将OpenSSL库用作共享对象（如 libssl.so ），或静态库（如 libssl.a ），但不能同时使用两者。将 libjnidispatch.so 与 libssl.a 混合在一起是可以的，但不能 libcrypto.a 和 libssl.so

java.lang.UnsatisfiedLinkError：无法从loader dalvik.system.PathClassLoader加载NativeMorphoSmartSDK_6.13.2.0-4.1

1 个答案: