Android Studio 包含 cpp 标头

Question

CMake 无法确定目标的链接器语言：CydiaSubstrate ... 是我得到的错误。我真的不明白我做错了什么，也找不到与通过 cmake 添加标题相关的任何内容。请参考以下代码：

# 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.
         platinmods

         # Sets the library as a shared library.
         SHARED

         # Provides a relative path to your source file(s).
         src/main/cpp/platinmods.cpp )

add_library( # Sets the name of the library.
         CydiaSubstrate

         # Sets the library as a shared library.
         SHARED

         # Provides a relative path to your source file(s).
         src/main/cpp/CydiaSubstrate.h )

# 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.
                   platinmods

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

target_link_libraries( # Specifies the target library.
                   CydiaSubstrate

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

Answer 1

您的代码正在尝试构建 2 个库：platinmods 和 CydiaSubstrate。但是，如果您的意图只是让 platinmods.cpp 使用 CydiaSubstrate.h，那么您的代码并没有做您想做的事情。猜你以后确实想要，

• 在源代码中，执行#include "CydiaSubstrate.h"，并将您的 CydiaSubstrate.h 复制到与 platinmods.cpp 相同的目录中
• build.gradle 中只保留 platinmod 相关代码，删除所有 CydiaSubstrate 相关行
• 如果您的头文件与源文件不在同一个文件夹中，请使用 CMake 的 target_include_directories()，如 this
• 如果您有源代码备份该头文件，您还需要将该源文件添加到编译中（与 platinmods.cpp 相同）
• 打开 CydiaSubstrate.h 看看需要定义什么宏才能使用它，这很有帮助。

然后执行 build->clean，然后 build ->build apk 看看还有什么问题（并修复它们）。

Answer 2

您可以尝试使用已在android-ndk 示例或this link Halim Qarroum 在其他相关帖子中关闭的链接。

希望对你有帮助。