勾选支持c++即可,生成的项目结构如下:
在module根目录右键,选择 Link C++ Project with Gradle,可以选择CMake 或 ndk-build。如果选择CMake则需指定CMakeLists.txt 脚本文件,如果选择 ndk-build指定Android.mk 脚本文件(如果 Application.mk 文件与您的 Android.mk 文件位于同一目录下,Android Studio 也会包含此文件)
只需将 externalNativeBuild
块添加到模块级 build.gradle 文件中,并使用 cmake
或 ndkBuild
块对其进行配置:
android { ... defaultConfig {...} buildTypes {...} // Encapsulates your external native build configurations. externalNativeBuild { // Encapsulates your CMake build configurations. cmake { // Provides a relative path to your CMake build script. path "CMakeLists.txt" } // or ndkBuild {...} } }
还支持利用变体为每个变体指定可选配置:
android { ... defaultConfig { ... // This block is different from the one you use to link Gradle // to your CMake or ndk-build script. externalNativeBuild { // For ndk-build, instead use the ndkBuild block. cmake { // Passes optional arguments to CMake. arguments "-DANDROID_ARM_NEON=TRUE", "-DANDROID_TOOLCHAIN=clang" // Sets a flag to enable format macro constants for the C compiler. cFlags "-D__STDC_FORMAT_MACROS" // Sets optional flags for the C++ compiler. cppFlags "-fexceptions", "-frtti" } } } buildTypes {...} productFlavors { ... demo { ... externalNativeBuild { cmake { ... // Specifies which native libraries or executables to build and package // for this product flavor. The following tells Gradle to build only the // "native-lib-demo" and "my-executible-demo" outputs from the linked // CMake project. If you don't configure this property, Gradle builds all // executables and shared object libraries that you define in your CMake // (or ndk-build) project. However, by default, Gradle packages only the // shared libraries in your app. targets "native-lib-demo", // You need to specify this executable and its sources in your CMakeLists.txt // using the add_executable() command. However, building executables from your // native sources is optional, and building native libraries to package into // your app satisfies most project requirements. "my-executible-demo" } } } paid { ... externalNativeBuild { cmake { ... targets "native-lib-paid", "my-executible-paid" } } } } // Use this block to link Gradle to your CMake or ndk-build script. externalNativeBuild { cmake {...} // or ndkBuild {...} } }
# Sets the minimum version of CMake required to build your native library. # This ensures that a certain set of CMake features is available to # your build. cmake_minimum_required(VERSION 3.4.1) # Specifies a library name, specifies whether the library is STATIC or # SHARED, and provides relative paths to the source code. You can # define multiple libraries by adding multiple add_library() commands, # and CMake builds them for you. When you build your app, Gradle # automatically packages shared libraries with your APK. add_library( # Specifies 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 ) # Specifies a path to native header files. include_directories(src/main/cpp/include/) find_library( # Defines the name of the path variable that stores the # location of the NDK library. log-lib # Specifies the name of the NDK library that # CMake needs to locate. log ) # Links your native library against one or more other native libraries. target_link_libraries( # Specifies the target library. native-lib # Links the log library to the target library. ${log-lib} )
使用 LLDB 来调试代码