Android Studio (gradle) generates double size apk file for paid version

Question

When I build my paid version, Android Studio (and Gradle) generates a double size apk file?

It's the same result generating apk from Android Studio and/or command line:

gradle clean assembleRelease

It includes the following directories extra:

assets/
main/
paid/

thus making it very large.

My build.gradle has the following definition for the paid version:

sourceSets {

    paid {
        manifest.srcFile 'AndroidManifest.xml'
        java.srcDirs = ['src/paid']
        resources.srcDirs = ['src']
        aidl.srcDirs = ['src']
        renderscript.srcDirs = ['src']
        res.srcDirs = ['res']
        assets.srcDirs = ['assets']
    }

}

In my src/paid/res directory I only have the following extra (unzip from apk):

40  ./res/drawable
8   ./res/drawable-hdpi
8   ./res/drawable-ldpi
8   ./res/drawable-mdpi
8   ./res/raw
8   ./res/raw-de
8   ./res/raw-sv
16  ./res/values
8   ./res/values-de
8   ./res/values-sv
120 ./res
120 .

And I use the following:

productFlavors {

    free {
        packageName "com.xyz.abc"
    }

    paid {
        packageName "com.xyz.abcpro"
    }

}

Directory sizes below (unzip from apk):

Free:

208 ./META-INF
8   ./org/apache/http/client
8   ./org/apache/http/entity/mime
8   ./org/apache/http/entity
24  ./org/apache/http
24  ./org/apache
24  ./org
888 ./res/drawable
584 ./res/drawable-hdpi
552 ./res/drawable-ldpi
560 ./res/drawable-mdpi
16  ./res/drawable-xhdpi
16  ./res/drawable-xxhdpi
488 ./res/layout
32  ./res/layout-land
8   ./res/layout-v10
16  ./res/layout-v17
8   ./res/layout-v7
8   ./res/layout-v8
64  ./res/menu
16  ./res/raw
16  ./res/raw-de
16  ./res/raw-sv
80  ./res/xml
3368    ./res
8448    .

Paid:

8   ./assets/scripts
8   ./assets
1000    ./main/res/drawable
720 ./main/res/drawable-hdpi
584 ./main/res/drawable-ldpi
656 ./main/res/drawable-mdpi
16  ./main/res/drawable-xhdpi
24  ./main/res/drawable-xxhdpi
504 ./main/res/layout
40  ./main/res/layout-land
8   ./main/res/layout-v10
16  ./main/res/layout-v17 
8   ./main/res/layout-v7
8   ./main/res/layout-v8
64  ./main/res/menu
16  ./main/res/raw
16  ./main/res/raw-de
16  ./main/res/raw-sv
152 ./main/res/values
72  ./main/res/values-de
72  ./main/res/values-sv
96  ./main/res/xml
4088    ./main/res
4104    ./main
368 ./META-INF
8   ./org/apache/http/client
8   ./org/apache/http/entity/mime
8   ./org/apache/http/entity
24  ./org/apache/http
24  ./org/apache
24  ./org
40  ./paid/res/drawable
8   ./paid/res/drawable-hdpi
8   ./paid/res/drawable-ldpi
8   ./paid/res/drawable-mdpi
8   ./paid/res/raw
8   ./paid/res/raw-de
8   ./paid/res/raw-sv
16  ./paid/res/values
8   ./paid/res/values-de
8   ./paid/res/values-sv
120 ./paid/res
120 ./paid
888 ./res/drawable
584 ./res/drawable-hdpi
552 ./res/drawable-ldpi
560 ./res/drawable-mdpi
16  ./res/drawable-xhdpi
16  ./res/drawable-xxhdpi
488 ./res/layout
32  ./res/layout-land
8   ./res/layout-v10
16  ./res/layout-v17
8   ./res/layout-v7
8   ./res/layout-v8
64  ./res/menu
16  ./res/raw
16  ./res/raw-de
16  ./res/raw-sv
80  ./res/xml
3368    ./res
14656   .

Free apk size:

-rw-r--r-- 1 admin staff 952930 Jan 6 10:01 free-release.apk

Paid apk size:

-rw-r--r-- 1 admin staff 1880495 Jan 6 10:00 paid-release.apk

It's a standard Android Studio setup with main/ and then parallell to main/ the following directory paid/:

.
./res
./res/drawable
./res/drawable/ic_launcher.png
./res/drawable/widget_icon_large.png
./res/drawable/widget_icon_small.png
./res/drawable-hdpi
./res/drawable-hdpi/ic_launcher.png
./res/drawable-ldpi
./res/drawable-ldpi/ic_launcher.png
./res/drawable-mdpi
./res/drawable-mdpi/ic_launcher.png
./res/raw
./res/raw/help.html
./res/raw-de
./res/raw-de/help.html
./res/raw-sv
./res/raw-sv/help.html
./res/values
./res/values/commons.xml
./res/values/strings.xml
./res/values-de
./res/values-de/strings.xml
./res/values-sv
./res/values-sv/strings.xml

Studio layout:

Update1:

When I added an empty directory free parallell to paid and changed the following:

sourceSets {

    free {
        manifest.srcFile 'AndroidManifest.xml'
        java.srcDirs = ['src/free']
        resources.srcDirs = ['src']
        aidl.srcDirs = ['src']
        renderscript.srcDirs = ['src']
        res.srcDirs = ['res']
        assets.srcDirs = ['assets']
    }

    paid {
        manifest.srcFile 'AndroidManifest.xml'
        java.srcDirs = ['src/paid']
        resources.srcDirs = ['src']
        aidl.srcDirs = ['src']
        renderscript.srcDirs = ['src']
        res.srcDirs = ['res']
        assets.srcDirs = ['assets']
    }

}

Now both apk has the same and double size!?

Update2:

Removed sourceSets all together and it worked!

Answer 1

I think you are specifying sourceSets incorrectly.

If you go back to the original configuration, product flavors free and paid, resources in src/paid/res, you can remove the sourceSets elements and the app should build fine.