如何在 Android Studio 2.2 Preview 1 中正确使用 NDK-Build [英] How to properly use NDK-Build in Android Studio 2.2 Preview 1

问题描述

Android Studio 2.2 Preview 1 有一个新的外部 ndk 构建功能，但是从官方博客文章中显示的 app/build.gradle 片段来看，完全不清楚如何设置 Application.mk 文件通常包含的其他 ndk 构建参数

Android Studio 2.2 Preview 1 has a new external ndk build feature, but from app/build.gradle snippet shown in official blog post it's not clear at all how to set additional ndk build parameters which Application.mk file usually contains

我可以通过 externalNativeBuild 设置 Android.mk ndk 构建文件，但是如何设置所需的 Application.mk 变量?

I'm able to set Android.mk ndk build file via externalNativeBuild, but how could I set the required Application.mk variables?

我的 Application.mk 包含:

NDK_TOOLCHAIN_VERSION := clang
APP_PLATFORM := android-16
APP_ABI := armeabi
APP_STL := c++_static
APP_CPPFLAGS += -std=c++11

推荐答案

带有更新的 gradle 插件的 Android Studio 2.2 Preview 3 添加了对其他参数的支持.您可以像这样设置 Application.mk 和其他配置:

Android Studio 2.2 Preview 3 with updated gradle plugin added support for additional arguments. You can set Application.mk and additional configuration like this:

defaultConfig {
  ndkBuild {
    arguments "NDK_APPLICATION_MK:=Application.mk"
    cFlags "-DTEST_C_FLAG1"  "-DTEST_C_FLAG2"
    cppFlags "-DTEST_CPP_FLAG2"  "-DTEST_CPP_FLAG2"
    abiFilters "armeabi-v7a", "armeabi"
  } 
}

如果可能，我会建议迁移到 CMake 构建系统，因为 Android Studio 中有更好的 C++ 代码编辑器和调试集成.您将在此处找到有关 gradle 插件配置的更多信息:https://sites.google.com/a/android.com/tools/tech-docs/external-c-builds.

If possible I would recommend migrating to CMake build system, because of better C++ code editor and debugging integration in Android Studio. You will find more info on gradle plugin configuration here: https://sites.google.com/a/android.com/tools/tech-docs/external-c-builds.

从 Android Studio 2.2 Preview 5 开始，您必须将 cmake 和 ndkBuild 组包装在 externalNativeBuild 组下:

From Android Studio 2.2 Preview 5 you must wrap cmake and ndkBuild groups under externalNativeBuild group:

defaultConfig {
  externalNativeBuild {
    ndkBuild {
      targets "target1", "target2"
      arguments "NDK_APPLICATION_MK:=Application.mk"
      cFlags "-DTEST_C_FLAG1", "-DTEST_C_FLAG2"
      cppFlags "-DTEST_CPP_FLAG2", "-DTEST_CPP_FLAG2"
      abiFilters "armeabi-v7a", "armeabi"
    } 
  }
}

编辑 2: 似乎由于构建工具中的错误，将 ndkBuild 包装在 externalNativeBuild 组下不起作用.

Edit 2: It seems that wrapping ndkBuild under externalNativeBuild group does not work because of a bug in build tools.

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