无法获取源代码以在 Android Studio 的 JNI 文件夹中构建

Question

我正在使用启用了 experimental NDK plugin 的 Android Studio 1.3。我已将整个 Box2d 文件夹与 Android.mk 和 Application.mk 一起放入 android studio 的 jni 文件夹中。 Android 工作室似乎完全忽略了 .mk 文件，因为当我更改它们时没有任何反应。无论如何，当我收到 directoy not found 错误时，我正在尝试编译 Box2d。 Error:(19, 42) Box2D/Collision/b2BroadPhase.h: No such file or directory。

Android.mk

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE:= liquidfun

LOCAL_C_INCLUDES := $(LOCAL_PATH)/Box2D/Collision \
            $(LOCAL_PATH)/Box2D/Collision/Shapes \
            $(LOCAL_PATH)/Box2D/Common \
            $(LOCAL_PATH)/Box2D/Dynamics \
            $(LOCAL_PATH)/Box2D/Dynamics/Contacts \
            $(LOCAL_PATH)/Box2D/Dynamics/Joints \
            $(LOCAL_PATH)/Box2D/Dynamics/Particle \
            $(LOCAL_PATH)/Box2D/Rope



include $(BUILD_SHARED_LIBRARY)

build.gradle

apply plugin: 'com.android.model.application'
model {
    android {
        compileSdkVersion = 21
        buildToolsVersion = "22.0.1"

        defaultConfig.with {
            applicationId = "com.mycompany.mygame"
            minSdkVersion.apiLevel = 15
            targetSdkVersion.apiLevel = 21
            versionCode = 1
            versionName = "1.0"
        }
    }
    android.buildTypes {
        release {
            minifyEnabled = false
            proguardFiles += file('proguard-rules.pro')
        }
    }
    android.ndk {
        moduleName = "liquidfun"
    }
}
def liquidFunDir = new File("${projectDir}/src/main/java/com/google/fpl/liquidfun")

task createLiquidFunDir {
    liquidFunDir.mkdirs()
}
dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.2.1'
}

如有任何提示，我们将不胜感激。谢谢。

Answer 1

您是否尝试在 windows 中编译？如果是这样，请在 Android.mk 中使用“\”而不是“/” 像这样：$(LOCAL_PATH)\Box2D\Common \

如果这没有帮助，请尝试像这样在 "build.gradle" 文件中指定包含：

android.ndk {
    moduleName ="liquidfun"
    CFlags += "-I${file("src/main/jni/Box2D/Collision")}".toString()
}

Answer 2

嘿，我遇到了类似的问题。 gradle 插件不尊重您的 Android.mk 文件。它会为您的项目创建一个临时 Android.mk。

要在新的实验性 android 插件中添加 Cflags：

apply plugin: 'com.android.model.application'
model {
    android {
        compileSdkVersion = 21
        buildToolsVersion = "22.0.1"

        defaultConfig.with {
            applicationId = "com.mycompany.mygame"
            minSdkVersion.apiLevel = 15
            targetSdkVersion.apiLevel = 21
            versionCode = 1
            versionName = "1.0"
        }
    }
    android.buildTypes {
        release {
            minifyEnabled = false
            proguardFiles += file('proguard-rules.pro')
        }
    }
    android.ndk {
        CFlags += "-I${projectDir}/src/main/jni/Box2D/Collision".toString()
        CFlags += "-I${projectDir}/src/main/jni/Box2D/Collision/Shapes".toString()
        CFlags += "-I${projectDir}/src/main/jni/Box2D/Dynamics".toString()
        CFlags += "-I${projectDir}/src/main/jni/Box2D/Dynamics/Contacts".toString()
        CFlags += "-I${projectDir}/src/main/jni/Box2D/Dynamics/Joints".toString()
        CFlags += "-I${projectDir}/src/main/jni/Box2D/Dynamics/Particle".toString()
        CFlags += "-I${projectDir}/src/main/jni/Box2D/Rope".toString()

        cppFlags += "-I${projectDir}/src/main/jni/Box2D/Collision".toString()
        cppFlags += "-I${projectDir}/src/main/jni/Box2D/Collision/Shapes".toString()
        cppFlags += "-I${projectDir}/src/main/jni/Box2D/Dynamics".toString()
        cppFlags += "-I${projectDir}/src/main/jni/Box2D/Dynamics/Contacts".toString()
        cppFlags += "-I${projectDir}/src/main/jni/Box2D/Dynamics/Joints".toString()
        cppFlags += "-I${projectDir}/src/main/jni/Box2D/Dynamics/Particle".toString()
        cppFlags += "-I${projectDir}/src/main/jni/Box2D/Rope".toString()
        moduleName = "liquidfun"
    }
}
def liquidFunDir = new File("${projectDir}/src/main/java/com/google/fpl/liquidfun")

task createLiquidFunDir {
    liquidFunDir.mkdirs()
}
dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.2.1'
}

而且看起来你正在针对 sdk 10 进行编译。@ph0b () 发布了一个答案，使得不可能运行任何东西 < lolipop.

希望对您有所帮助

无法获取源代码以在 Android Studio 的 JNI 文件夹中构建

Can't get source code to build in JNI folder in Android Studio

c++

java

android

android-ndk

android-studio