Torge Torge - 2 months ago 29
Android Question

How to set variable according to gradle flavors

I want to pass a variable

test
that I set differently per flavor as a define to the NDK. But for some reason he always passes the value of the last flavor.

Here is the build.gradle:

apply plugin: 'com.android.library'

def test

android {
compileSdkVersion 23
buildToolsVersion "23.0.2"
defaultPublishConfig "flavorARelease"
publishNonDefault true

defaultConfig {
minSdkVersion 15
targetSdkVersion 17

ndk {
moduleName "test"
ldLibs "log"
}
}

productFlavors {
flavorA {
test = 1
}

flavorB {
test = 2
}
}

buildTypes {
debug {
ndk {
if (cFlags == null) { cFlags = "" }
cFlags = cFlags + " -DLOGGING=1 -DTEST="+test+" "
}
minifyEnabled false
}
release {
ndk {
if (cFlags == null) { cFlags = "" }
cFlags = cFlags + " -DLOGGING=0 -DTEST="+test+" "
}
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
}


And here are the CFLAG lines from the generated Android.mk

build/intermediates/ndk/flavorA/debug/Android.mk:

LOCAL_CFLAGS := -DLOGGING=1 -DTEST=2


I expected
-DTEST=1
here

build/intermediates/ndk/flavorB/debug/Android.mk:

LOCAL_CFLAGS := -DLOGGING=1 -DTEST=2


So where is my mistake? Or how can I achieve my goal? Please also consider that the real problem is more complex and I want to make those defines in the "buildTypes" segment if possible.

Answer

I found the solution:

First instead of def test specify a new field for all productFlavors

productFlavors.all {
    ext.dTest = null
}

Then this field is set in each flavor (code unchanged)

productFlavors {    
    flavorA {
        dTest = 1
    }

    flavorB {
        dTest = 2
    }    
}

And finally you can do this in the buildTypes

buildTypes {    
    all {
         productFlavors {
            all {
                ndk {
                    if (cFlags == null) { cFlags = "" }
                    cFlags = cFlags + " -DTEST="+dTest+" "
                }
            }
        }
    }
    debug {           
        minifyEnabled false
        ndk {
            if (cFlags == null) { cFlags = "" }
            cFlags = cFlags + " -DLOGGING=1 "
        }
    }
    release {
        minifyEnabled true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        ndk {
            if (cFlags == null) { cFlags = "" }
            cFlags = cFlags + " -DLOGGING=0 "
        }
    }
}

Here the full file:

apply plugin: 'com.android.library'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"
    defaultPublishConfig "flavorARelease"
    publishNonDefault true

    defaultConfig {
        minSdkVersion 15
        targetSdkVersion 17

        ndk {
            moduleName "dTest"
            ldLibs "log"
        }
    }

    productFlavors.all {
        ext.test = null
    }

    productFlavors {    
        flavorA {
            dTest = 1
        }

        flavorB {
            dTest = 2
        }    
    }


    buildTypes {    
        all {
            productFlavors {
                all {
                    ndk {
                        if (cFlags == null) { cFlags = "" }
                        cFlags = cFlags + " -DTEST="+dTest+" "
                    }
                }
            }
        }
        debug {           
            minifyEnabled false
            ndk {
                if (cFlags == null) { cFlags = "" }
                cFlags = cFlags + " -DLOGGING=1 "
            }
        }
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

            ndk {
                if (cFlags == null) { cFlags = "" }
                cFlags = cFlags + " -DLOGGING=0 "
            }
        }
    }

}