Andorid studio 添加一个 C++ 函数和库

如何解决Andorid studio 添加一个 C++ 函数和库

我正在尝试使用 android ndk 添加 C++。我的 C++ 函数使用 google tink 库，它运行良好。

#include <fstream>
#include <sstream>

#include "tink/aead.h"
#include "tink/cleartext_keyset_handle.h"
#include "tink/config.h"
#include "tink/json_keyset_reader.h"
#include "tink/keyset_handle.h"
#include "tink/keyset_reader.h"
#include "tink/config/tink_config.h"
#include "tink/cc/aead/aead_key_templates.h"

int main() {
    std::string plaintext("helloworld");
    std::string aad("adata");
    
    auto status = crypto::tink::TinkConfig::Register();
    auto new_keyset_handle_result = crypto::tink::KeysetHandle::GenerateNew(crypto::tink::AeadKeyTemplates::Aes256Gcm());
    if (!new_keyset_handle_result.ok()) return 0;
    
    auto keyset_handle = std::move(new_keyset_handle_result.ValueOrDie());
    // use the keyset...

    auto aead_result= keyset_handle->GetPrimitive<crypto::tink::Aead>();
    if (!aead_result.ok()) return 0;
    auto aead = std::move(aead_result.ValueOrDie());

    // 3. Use the primitive.
    auto ciphertext_result = aead->Encrypt(plaintext,aad);
    if (!ciphertext_result.ok()) return 0;
    auto ciphertext = std::move(ciphertext_result.ValueOrDie());
    if (!status.ok());
    std::cout << ciphertext;
    return 0;
}

我使用的 Cmake 文件是

cmake_minimum_required(VERSION 3.5)
project(TinkHelloWorld CXX)

set(CMAKE_BUILD_TYPE Release)

# Import Tink as an in-tree dependency.
add_subdirectory(tink tink)

add_executable(main main.cc)
target_link_libraries(main tink::static)

所以我在 Android studio ad 的 cpp 中修改了 Cmake 文件

cmake_minimum_required(VERSION 3.10.2)

# Declares and names the project.

project("myapplication")

# 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_subdirectory(third/tink)

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).
             native-lib.cc )

# 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 this
# build script,prebuilt third-party libraries,or system libraries.

target_link_libraries( # Specifies the target library.
                       native-lib

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

但是当我像这样修改Cmake文件时，cpp下的项目文件变得不可见。 enter image description here

但是文件不会被删除。 注意：我给函数起了另一个名字，比如 tinktry() ，我添加到 native-lib.cc 的所有头文件看起来都不错，但 JNICALL 给出了错误。提前致谢。 enter image description here