Android studio gradle 和native的一些配置记录

gradle.properties里面可以定义一些变量，以便在build.gradle中使用，举个例子：

systemProp.myDir=/home/myDir

在build.gradle中就可以使用这个变量，例如：

    externalNativeBuild {
        cmake {
            version "3.10.2"
            path file(System.properties['myDir']+'Src/CMakeLists.txt')
        }
    }

    sourceSets {
        main {
            jniLibs.srcDirs System.properties['myDir']+'thirdLibs/ffmpeg'

        }
    }

显然System.properies['myDir']就是我们在gradle.properties里面定义的。

下面给定一个比较完善的build.gradle配置：

apply plugin: 'com.android.library'

android {
    compileSdkVersion versions.compileSdkVersion
    buildToolsVersion versions.buildToolsVersion
    android.ndkVersion versions.ndkVersion


    defaultConfig {
        minSdkVersion versions.minSdkVersion
        targetSdkVersion versions.targetSdkVersion
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        consumerProguardFiles 'consumer-rules.pro'

        externalNativeBuild {
            cmake {
                abiFilters "arm64-v8a"
                cppFlags "-std=c++11 -frtti -fexceptions"
                arguments "-DANDROID_STL=c++_shared", "-DANDROID_PLATFORM=android-21"
            }
        }

        ndk {
            abiFilters "arm64-v8a"
        }
    }
    externalNativeBuild {
        cmake {
            version "3.10.2"
            //这里可以指定自己定义的CMakefile
            path file(System.properties['myDir']+'Src/CMakeLists.txt')
        }
    }

    sourceSets {
        main {
            //这里可以指定依赖库的路径
            jniLibs.srcDirs System.properties['myDir']+'thirdlibs/ffmpeg'

        }
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

}

dependencies {
    api project(':libCommon')
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    api "com.github.bumptech.glide:glide:4.11.0"
    annotationProcessor "com.github.bumptech.glide:compiler:4.11.0"

    implementation ('com.github.bumptech.glide:okhttp3-integration:4.4.0'){
        exclude group: 'glide-parent'
    }
}

下面给出cmakelist实现，myDir/Src/CmakeList.txt实现：

cmake_minimum_required(VERSION 3.10.0 FATAL_ERROR)

project(NLEPlatformPro CXX)

add_definitions(-DTARGET_IPHONEOS)
add_definitions(-DANDROID_NDK)

#这些是库路径，这些路径下面有各自的CMakeList
add_subdirectory(Externlib/libOne)
add_subdirectory(Externlib/libTwo)
add_subdirectory(project/libCore/src/main/cpp)

libOne中的Cmakelist.txt举例

# 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 3.10.0)

set(CMAKE_VERBOSE_MAKEFILE ON)

project(oneLib CXX)

add_definitions(-DMARKUP_STDCONV)

#匹配cpp
file(GLOB ComSupportSources
        "Android/ComSupport/*.cpp" "Android/Common/Audio/*.cpp" "Android/Common/ComSupport/*.cpp" "Android/Common/Image/*.cpp")
file(GLOB AndroidSources "Android/*.cpp" "Util/*.cpp")
file(GLOB AndroidJNISources "Android/Jni/*.cpp" 

# 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.
        AndrCodec

        # Sets the library as a shared library.
        SHARED

        # Provides a relative path to your source file(s).
        ${ComSupportSources}
        ${AndroidSources}
        ${AndroidJNISources}
        ../Base/COM/mediaInfo.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)

find_library(
        jnigraphics-lib
        jnigraphics
)


# 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_include_directories(oneLib PRIVATE
    Android
    Android/Jni
    Android/Common/Audio
        ../../../SDK/ffmpeg/include
        )

add_library(lib_opencv SHARED IMPORTED)
if(${ANDROID_ABI} STREQUAL "armeabi-v7a")
    set(OPENCV_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../../SDK/opencv/armeabi-v7a/libopencv_java4.so)
else()
    set(OPENCV_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../../SDK/opencv/arm64-v8a/libopencv_java4.so)
endif()
set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION ${OPENCV_PATH})


add_library(ffmpeg SHARED IMPORTED)

add_dependencies(${PROJECT_NAME}
        NLELogger
        )

set_target_properties(ffmpeg
        PROPERTIES IMPORTED_LOCATION
        ${FFMPEG_PATH})


target_link_libraries( # Specifies the target library.
        ${PROJECT_NAME}  PRIVATE
        ffmpeg
        lib_opencv
        ${jnigraphics-lib}
        ${log-lib}
        )

 

本文地址：https://blog.csdn.net/najiutan/article/details/111866910