Question

如果我为一个ABI构建我的AndroidStudio，它会按预期工作。

如果我支持两个ABI，请为＆＃39; armeabi-v7a ＆＃39;和＆＃39; arm64-v8a ＆＃39;，然后Android Studio将重建每个文件，即使没有任何更改。

我将CMake外部版本用于我应用的原生部分。

我的成绩档案：

android {
    compileSdkVersion 26
    buildToolsVersion '26.0.2'
    defaultConfig {
        applicationId "com.steenriver.biplane"
        minSdkVersion 19
        targetSdkVersion 19
        versionCode 115
        versionName "1.15"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        ndk {
            //abiFilters 'x86', 'x86_64', 'armeabi', 'armeabi-v7a', 'arm64-v8a'
            abiFilters 'armeabi-v7a', 'arm64-v8a'
            //abiFilters 'arm64-v8a'
            //abiFilters 'armeabi-v7a'
        }
        externalNativeBuild {
            cmake {
                //ldFlags "-Wl,-fuse-ld=gold"
                cppFlags "-std=c++11 -DANDROID=1 -DPLAY=1 -DUSEES3=1 -DLOGTAG=biplane"
                arguments "-DCMAKE_VERBOSE_MAKEFILE=1", "-DANDROID_TOOLCHAIN=clang", "-DANDROID_ARM_NEON=TRUE", "-DANDROID_ARM_MODE=arm"
            }
        }

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        debug {
            externalNativeBuild {
                cmake {
                    cppFlags += "-DDEBUG -DSHOWGRAPHS"
                }
            }
        }
    }
    externalNativeBuild {
        cmake {
            path '../jni/CMakeLists.txt'
        }
    }
}

我的顶级CMakeLists.txt：

cmake_minimum_required(VERSION 3.4.1)


# dependency: dblunt


set( dblunt_src_DIR $ENV{HOME}/src/dutch-blunt/src )
set( dblunt_build_DIR $ENV{HOME}/src/dutch-blunt/src/output )
file(MAKE_DIRECTORY ${dblunt_build_DIR})
add_subdirectory( ${dblunt_src_DIR} ${dblunt_build_DIR} )


# dependency: GBase

set( gbase_src_DIR $ENV{HOME}/apps/GBase/src )
set( gbase_build_DIR $ENV{HOME}/apps/GBase/src/output )
file(MAKE_DIRECTORY ${gbase_build_DIR})
add_subdirectory( ${gbase_src_DIR} ${gbase_build_DIR} )


# dependency: PI

set( pi_src_DIR ../../PI )
set( pi_build_DIR ../../PI/output )
file(MAKE_DIRECTORY ${pi_build_DIR})
add_subdirectory( ${pi_src_DIR} ${pi_build_DIR} )


# dependency uif
set( uif_src_DIR ../../../uif )
set( uif_build_DIR ../../../uif/output )
file(MAKE_DIRECTORY ${uif_build_DIR})
add_subdirectory( ${uif_src_DIR} ${uif_build_DIR} )


# dependency gpgoap
set( gpgoap_src_DIR $ENV{HOME}/src/GPGOAP )
set( gpgoap_build_DIR $ENV{HOME}/src/GPGOAP/output )
file(MAKE_DIRECTORY ${gpgoap_build_DIR})
add_subdirectory( ${gpgoap_src_DIR} ${gpgoap_build_DIR} )


# dependency: OpenDE
set( opende_src_DIR $ENV{HOME}/src/opende )
set( opende_build_DIR $ENV{HOME}/src/opende/output )
file(MAKE_DIRECTORY ${opende_build_DIR})
add_subdirectory( ${opende_src_DIR} ${opende_build_DIR} )


# dependency: OpenAL
set( openal_src_DIR $ENV{HOME}/src/openal-soft/jni )
set( openal_build_DIR $ENV{HOME}/src/openal-soft/jni/output )
file(MAKE_DIRECTORY ${openal_build_DIR})
add_subdirectory( ${openal_src_DIR} ${openal_build_DIR} )


# dependency: freealut
set( freealut_src_DIR $ENV{HOME}/src/freealut/src )
set( freealut_build_DIR $ENV{HOME}/src/freealut/src/output )
file(MAKE_DIRECTORY ${freealut_build_DIR})
add_subdirectory( ${freealut_src_DIR} ${freealut_build_DIR} )


# depencency: gpg (prebuilt, provided by Google)

add_library( gpg
             STATIC
             IMPORTED
)
set_target_properties( gpg
        PROPERTIES IMPORTED_LOCATION
        $ENV{HOME}/src/gpg-cpp-sdk/android/lib/gnustl/${ANDROID_ABI}/libgpg.a )


set ( CMAKE_SHARED_LINKER_FLAGS "-fuse-ld=gold ${CMAKE_SHARED_LINKER_FLAGS}" )

# now build app's shared lib
add_library(biplane SHARED
    main.cpp
    StateManager.cpp
    scorekeeper.cpp
)

target_include_directories(biplane PRIVATE
    $ENV{HOME}/src/gpg-cpp-sdk/android/include
    $ENV{HOME}/apps/GBase/src
    $ENV{HOME}/apps/GBase/src/Android
    $ENV{HOME}/src/stb
    ../../PI
    .
)

# add lib dependencies
target_link_libraries(biplane
    gpg
    pi
    uif
    gbase
    dblunt
    gpgoap
    opende
    freealut
    openal
    EGL
    GLESv3
    OpenSLES
    android
    log
    z
    m
)

如何说服Android Studio仅重新编译更改的文件？

Answer 1

这是因为构建变体都具有.o文件的相同输出目录。

您需要将构建目录拆分为release / debug并分成不同的ABI。

执行此操作的方法是使用 CMAKE_CURRENT_BINARY_DIR 宏：

set( gpgoap_src_DIR $ENV{HOME}/src/GPGOAP )
add_subdirectory( ${gpgoap_src_DIR} ${CMAKE_CURRENT_BINARY_DIR}/gpgoap )

如果你这样做，那么arm7调试对象文件将最终进入： app/.externalNativeBuild/cmake/debug/armeabi-v7a所以他们不会与其他ABI发生冲突。

请注意，您无法重复使用输出目录，因此您需要为每个add_subdirectory（）执行后缀。

最后一句话：输出目录对于add_subdirectory（）是可选的cmake documentation says，但我发现情况并非如此。你需要提供至少两个参数。

如果支持多个ABI，AndroidStudio每次都会重建所有内容

1 个答案: