如何为某些构建变体禁用Android NDK构建 [英] How to disable Android NDK build for some build variant

问题描述

我正在使用Android Studio 2.2，并已设置Gradle通过CMake使用NDK构建c/c ++源.

I am using Android Studio 2.2 and have setup Gradle to build c/c++ sources with NDK via CMake.

现在，我想为buildType"debug"禁用NDK构建.对于buildType"release"，我想保留它.

Now I would like to disable NDK build for buildType "debug". For buildType "release" I would like to keep it.

目标是使NDK源代码在构建服务器上编译(使用发行版")，但对开发人员禁用它(使用调试").

The goal is to make NDK sources compile on the build server (using "release") but disable it for developers (using "debug").

这是当前正在使用的build.gradle文件:

This is the build.gradle file currently in use:

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

    defaultConfig {
        externalNativeBuild {                
            cmake {
                arguments "-DANDROID_TOOLCHAIN=clang"
                cppFlags "-std=c++14"
            }
        }

        ndk {
            abiFilters 'armeabi-v7a', 'x86'
        }
    }

    buildTypes {        
        release {            
            externalNativeBuild {                
                cmake {
                    arguments "-DANDROID_TOOLCHAIN=clang"
                    cppFlags "-std=c++14"
                }
            }

            ndk {
                abiFilters 'armeabi-v7a'
            }
        }
    }
}

1. 如何为defaultConfig或buildType"debug"禁用NDK构建(externalNativeBuild)?

1. How can I disable NDK build (externalNativeBuild) for defaultConfig or buildType "debug"?

其他开发人员不会安装NDK(local.properties 没有 ndk.dir = PATH_TO_NDK).可以配置吗?

Other developers won't have NDK installed (local.properties without ndk.dir=PATH_TO_NDK). Is this possible to configure?

预先感谢

此externalNativeBuild必须配置为"com.android.library"模块，而不是"com.android.application"模块.

This externalNativeBuild must be configured with a 'com.android.library'-module, not a 'com.android.application'-module.

推荐答案

这是我解决的方法.

以此为目标，Gradle构建适用于安装和未安装NDK (以及在构建服务器上)的开发人员.

This way Gradle build works for developers with and without NDK installed (and on the build server), which was the goal.

/*
 * As soon as Gradle is linked to the externalNativeBuild (cmake / ndkBuild) with a path to
 * CMakeLists.txt / Android.mk, the ndk.dir from local.properties file or the ANDROID_NDK_HOME
 * environment variable needs to be set, otherwise gradle fails.
 * E.g.:
externalNativeBuild {
    cmake {
        path "CMakeLists.txt"
    }
}
*/

// Only enable externalNativeBuild on machines with NDK installed -> valid ndkDir
def ndkDir = project.android.ndkDirectory;
if (ndkDir != null && !ndkDir.toString().isEmpty()) {

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

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