无法在Android中的JNI文件夹中生成源代码

Question

我正在使用AndroidStudio1.3，启用了实验NDK插件。我已经将整个Box2d文件夹与Android.mk和Application.mk一起放到了android中的jni文件夹中。Android似乎完全忽略了.mk文件，因为当我改变它们时，什么都不会发生。不管怎么说，当我得到了directoy而不是找到的错误时，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'
}

任何提示都将不胜感激。谢谢。

Answer 1

嘿，我有个类似的问题。gradle插件不尊重您的Android.mk文件。它为您的项目创建临时Android.mk。

要在新的实验性android插件中添加标记：

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'
}

@ph0b (https://stackoverflow.com/a/31365158/5105445)发布了一个答案，使得不可能在任何<棒棒糖上运行。

希望它能帮上忙

Answer 2

您想在windows中编译吗？如果是这样，请在Android.mk中使用"\“而不是"/”，如下所示：$(LOCAL_PATH)\Box2D\Common \

如果这无助于在"build.gradle“文件中指定如下所示的包含：

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