未针对产品口味定义的android NDK cflags [英] android NDK cflags not defined for product flavors

问题描述

我的gradle文件中有

In my gradle file I have

externalNativeBuild {
        ndkBuild {
            path 'src/main/jni/Android.mk'
        }
    }
    productFlavors {
        flavorone{
            externalNativeBuild.cmake {
                cFlags '-DFLAVORONE'
            }
            signingConfig signingConfigs.flavoronerelease

        }         
        flavortwo{
            applicationId "com.mycompany.flavortwo"
            versionCode 2
            versionName "1.0.1"
            externalNativeBuild.cmake {
                cFlags '-DFLAVORTWO'
            }
            signingConfig signingConfigs.flavortworelease
        }
        flavorthree{
            applicationId "com.mycompany.flavorthree"
            versionCode 7
            versionName "1.0.6"
            externalNativeBuild.cmake {
                cFlags '-DFLAVORTHREE'
            }
            signingConfig signingConfigs.flavorthreerelease
        }
    }

将定义的变量添加到我的c文件中，这样我就可以识别样式. 在我的C文件中，我有:

To add defined variables to my c file so I can identify the flavor. in my c file I have:

    const char* secret;
    #ifdef FLAVORONE
        const char* secret = "flavor_1_secret";
    #elif FLAVORTWO
        const char* secret = "flavor_2_secret";
    #elif FLAVORTHREE
        const char* secret = "flavor_3_secret";
    #else
        const char* secret = "flavor_1_secret";
    #endif

    JNIEXPORT jstring JNICALL
    Java_com_mycompany_app_MainActivity_getSecret(JNIEnv *env, jobject instance) {
        return (*env)->  NewStringUTF(env, secret);
}

问题是，当我以风味2或3编译并运行我的代码时，getSecret()返回"flavor_1_secret".我怀疑我用cflags定义变量时做错了什么，但是对于使用NDK来说是一个新手，而且我很难弄清楚自己做错了什么.我也尝试过:

The problem is when I compile and run my code in flavor 2 or 3 getSecret() returns "flavor_1_secret". I suspect I have done something wrong defining the variables with cflags, but am very new to working with the NDK and I am having trouble figuring out what I've done wrong. I also tried:

    const char* secret;
    #ifdef FLAVORTWO
        const char* secret = "flavor_2_secret";
    #else
        const char* secret = "flavor_1_secret";
    #endif

    JNIEXPORT jstring JNICALL
    Java_com_mycompany_app_MainActivity_getSecret(JNIEnv *env, jobject instance) {
        return (*env)->  NewStringUTF(env, secret);
}

并将其编译为flavor2.我仍然得到了风味1的秘密回报.因此，它似乎总是会出现在else中，并且未定义flag变量.

and compiled it as flavor2. I still got the flavor 1 secret return. So it seems to always fall through the else and the flag variables are not defined.

推荐答案

您使用的是ndkBuild(通过Android.mk)，而不是cmake.因此，在调味部分中，您需要

You use ndkBuild (via Android.mk), not cmake. Hence, in flavored section, you need

externalNativeBuild.ndkBuild

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