//改为library

apply plugin: 'com.android.library'

//读取local.properties里的配置属性add_static_lib.dir，该属性指明libstatic_add.a静态库所在目录

Properties properties = new Properties()

properties.load(project.rootProject.file('local.properties').newDataInputStream())

def add_static_lib = properties.getProperty('add_static_lib.dir')

android {

    compileSdkVersion 27

    defaultConfig {

        minSdkVersion 16

        targetSdkVersion 27

        versionCode 1

        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        //添加下面

        ndk {

            abiFilters 'armeabi-v7a'

            // these platforms cover 99% percent of all Android devices

        }

        externalNativeBuild {

            cmake {

               //添加下面

                arguments '-DANDROID_PLATFORM=android-14',

                        '-DANDROID_TOOLCHAIN=clang',

                        '-DANDROID_ARM_NEON=TRUE',

                        '-DANDROID_STL=gnustl_static',

                        "-DPATH_TO_ADD_STATIC_LIB:STRING=${add_static_lib}"

                cFlags '-O3', '-fsigned-char' // full optimization, char data type is signed

                cppFlags '-fsigned-char', "-I${add_static_lib}"

            }

        }

    }

    //添加下面

    sourceSets {

        main {

            jniLibs.srcDirs = ['src/main/cpp']

        }

    }

    //添加下面

    externalNativeBuild {

        cmake {

            path 'src/main/cpp/CMakeLists.txt'

        }

    }

    //添加下面

    sourceSets.main {

        jni.srcDirs = []

        jniLibs.srcDir 'src/main/libs'

    }

    buildTypes {

        release {

            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        }

    }

}

dependencies {

    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'com.android.support:appcompat-v7:27.1.1'

    implementation 'com.android.support.constraint:constraint-layout:1.1.0'

    implementation 'com.android.support:design:27.1.1'

    testImplementation 'junit:junit:4.12'

    androidTestImplementation 'com.android.support.test:runner:1.0.2'

    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

}

## This file must *NOT* be checked into Version Control Systems,

# as it contains information specific to your local configuration.

#

# Location of the SDK. This is only used by Gradle.

# For customization when using a Version Control System, please read the

# header note.

#Wed May 16 13:05:05 CST 2018

ndk.dir=D\:\\NanRi\\Android\\android-ndk-r16b

sdk.dir=C\:\\Users\\suning\\AppData\\Local\\Android\\Sdk

//添加如下，指明libstatic_add.a静态库所在目录

add_static_lib.dir=D\:\\NanRi\\Android\\Android-Studio-Project\\ModuleProject\\app\\src\\main\\libs\\

cmake_minimum_required(VERSION 3.4.1)

set(

     PATH_TO_ADD_STATIC_LIB

     CACHE STRING ""

)

message(${ANDROID_ABI})

file(GLOB CPP_FILES "*.cpp")

add_library(

     native-lib

     SHARED

     ${CPP_FILES}

)

include_directories(src/main/cpp)

include_directories(${PATH_TO_ADD_STATIC_LIB})

target_link_libraries(

    native-lib

    android

    OpenSLES

    ${PATH_TO_ADD_STATIC_LIB}/libstatic_add.a

)