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

Question

我在构建我的应用程序时收到 null UnsatisfiedLinkError。

我正在使用 openssl 和一些第三方库来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，还是有任何方法可以加载 .so 文件。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。您必须给每个人一个单独的名称，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。如上所见，逻辑名不一定与文件名相关。

如果您的 native-lib 依赖其中的一些，您可以使用这些名称：

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。可以将 libjnidispatch.so 与 libssl.a 混合在一起，但不能将 libcrypto.a 和 libssl.so 混合在一起.