Android Studio 2.3.3 using gradle component model was creating .aar automagically; Android Studio 3.4.1 now using CMake or NDK-Build does not - android-studio

Question

My wavvoxlibrary/build.gradle is not only serving the main program (app/build.gradle) but also creating the shared library .aar.
And that is working nicely with Android Studio 2.3.3 and -- for the library -- gradle-experimental 0.9.3. The gradle component model, however, does not support abifilters, say, to build the JNI / c/c++ programs in 64-bit.
So I upgraded to Android Studio 3.4.1, and my wavvoxlibrary/build.gradle moved away form said component model and got the appropriate CMakeList.txt file to list the c/c++ programs and any compiler options that used to be part of the older build.gradle. And I also added the NDK-Build option with the Application.mk and Android.mk make files.
So far so good. My app is built and running correctly -- including the shared libraries for both, armabi-v7a (32-bit) and arm64-v8a (64-bit).
What's missing: to create the .aar file, I have to explicitly call the gradle task wavvoxlibrary .. assemble.
Is there some way to generate the .aar that during build of my, say, signed apk?
I have removed the gradle component model to move from gradle:2.3.3 and gradle-experimental:0.9.3 with "apply plugin: 'com.android.model.library' "
to gradle:3.4.1 with "apply plugin: 'com.android.library' " and also called the cmake (or, optionally ndkBuild instead) to list the c/c++ files and compiler options there.
See my blog with the details: http://jurgenmenge.com/blog/computer/migrate-a-library-in-android-studio/
import java.text.SimpleDateFormat
// migrate from Android Studio with gradle:2.3.3 + gradle-experimental:0.9.3
// to Android Studio with gradle:3.4.1 + Cmake + ndkBuild
// jm*20190614
apply plugin: 'com.android.library'
//apply plugin: 'com.android.model.library'
/**
* Each subversion code should be exactly 2 numeric digits or we will get wrong versions published
* in the Google Play Store; buildType to switch between "cmake" and "ndkBuild"
*/
ext.majorVersion = "03"
ext.minorVersion = "08"
ext.patchVersion = "03"
static String buildKind() { // neat trick I created :-) // jm*20190614
//return "gradle" // model - experimental
//return "cmake"
return "ndkBuild"
}
/**
* The name of the app version, using the Semantic Versioning format (major.minor.patch)
* #return
*/
String appVersionName() {
String appVersion = removeLeadingZeros(ext.majorVersion) + "." \
+ removeLeadingZeros(ext.minorVersion) + "." \
+ ext.patchVersion
System.out.println(" ************************************************")
System.out.println(" *** WavvoxLibrary version: " + appVersion + " ")
System.out.println(" *** buildKind " + buildKind() )
System.out.println(" ************************************************")
return appVersion
}
//model {
android {
compileSdkVersion 28
buildToolsVersion "28.0.3" // "25.0.3"
defaultConfig {
minSdkVersion 16 /*** was: 8 ***/
targetSdkVersion 28
//
versionName appVersionName() + "_" + buildKind()
setProperty("archivesBaseName", "wavvoxlibrary-$versionName")
buildConfigField "String", "VERSION_NAME_WAVVOX_FORMAT", versionNameWavvoxFormat()
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
//} // defaultConfig
ndk {
moduleName "wavvox-decoder"
ldLibs "log", "android"
// these platforms cover 99% percent of all Android devices
abiFilters "arm64-v8a", "armeabi-v7a"
//, "x86", "x86_64"
} // ndk
externalNativeBuild {
switch (buildKind()) {
case "ndkBuild":
ndkBuild {
cFlags "-std=c99", "-O3", "-Ofast", "-mfpu=neon" // jm*20190616
// "-Wno-error=format-security", "-mfloat-abi=softfp:, "-g"
abiFilters "armeabi-v7a", "arm64-v8a"
}
break
case "cmake":
cmake {
cFlags "-std=c99", "-O3", "-Ofast", "-mfpu=neon" // jm*20190616
// "-Wno-error=format-security", "-mfloat-abi=softfp:, "-g"
abiFilters 'armeabi-v7a', 'arm64-v8a'
}
break
default:
println "**** unknown buildType value: " + buildType() + " ****"
}
} // externalNativeBuild
} // defaultConfig
buildTypes {
release {
minifyEnabled true
proguardFiles "proguard-rules.pro"
}
} // buildTypes
// } // android // jm*20190405
// android.ndk { // jm*20190405
// C source files to include in the build script
// android.sources.main.jni { // jm*20190405
/* if (buildKind() == "gradle") // using "model" in gradle_experimental
sourceSets {
main {
jniLibs.srcDirs = ['src/main/jni'] // for pre-built .so files
jni {
//source {
include "wavvoxNativeApp.c"
// ... and all the other c/c++ programs
srcDir "jni"
//}
} // jni
} // main
} // source
*/
externalNativeBuild {
switch (buildKind()) {
case "ndkBuild":
ndkBuild {
path 'src/main/jni/Android.mk'
}
break
case "cmake":
cmake {
version '3.10.2'
path 'src/main/jni/CMakeLists.txt'
}
break
default:
println "**** unknown buildType value: " + buildType() + " ****"
}
} // externalNativeBuild
} // android // jm*20190405
//} // model
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:support-annotations:28.0.0'
testImplementation 'junit:junit:4.12'
testImplementation 'org.hamcrest:hamcrest-junit:2.0.0.0'
}
/**
* Workaround for using ProGuard with the experimental Gradle plugin.
*
* Trouble seems to be that unless process(Debug|Release)Resources task is needed, it is not created
* and VariantOutputScope.setProcessResourcesTask in TaskManager.createProcessResTask() is not
* called so when TaskManager.applyProguardConfig() calls
* BaseVariantOutputData.processResouresTask.getProguardOutputFile() it does so on a null object.
* So, by making transformClassesAndResourcesWithProguardFor(Debug|Release) depend on
* process(Debug|Release)Resources I force the task to be created
*
* More discussions here: https://issuetracker.google.com/issues/37079003
*/
tasks.all { task ->
def match = task.name =~ /^transformClassesAndResourcesWithProguardFor(.*)$/
if (match) {
task.dependsOn "process${match.group(1)}Resources"
return
}
}
// ToDo: get automatic build of .aar libraries working;
// currently, double-click on Gradle "wavvoxlibrary / Tasks / build / assemble"
}
I wanted to get the .aar file created automagically while building the signed app (.apk) without the extra step running gradle task wavvoxlibrary assemble.
What do I miss?
Thanks, jm.

Answer 1

I think you might have tried this, but still adding this as answer, if it does not help, will delete this answer.
Add your library module to your settings.gradle file.
include ':app', ':my-library-module'
https://developer.android.com/studio/projects/android-library#AddDependency