详解AndroidStudio3.0开发调试安卓NDK的C++代码

externalNativeBuild {
 cmake {
 path "CMakeLists.txt"
 }
}

externalNativeBuild {
 cmake {
 cppFlags "-std=c++14"
 }
}

#include <jni.h>
#include <String>
extern "C"
JNIEXPORT jString
JNICALL
Java_com_bigsing_myapplication_MainActivity_StringFromJNI(
 jnienv *env,jobject /* this */) {
 std::string Hello = "Hello from C++";
 return env->NewStringUTF(Hello.c_str());
}

# 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 )
# 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.
   ${log-lib} )

externalNativeBuild {
 cmake {
 path "CMakeLists.txt"
 }
}

externalNativeBuild {
 cmake {
 cppFlags "-std=c++14"
 }
}

file(GLOB native_srcs "src/main/cpp/*.cpp" "src/main/cpp/dalvik/*.cpp" "src/main/cpp/art/*.cpp" "src/main/cpp/art/*.S")
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_srcs}
  )

file(GLOB libs src/main/cpp/3rd/libsubstrate.so src/main/cpp/3rd/libsubstrate-dvm.so)
target_link_libraries( # Specifies the target library.
   native-lib
   # Links the target library to the log library
   # included in the NDK.
   ${libs}
   ${log-lib} )