Generate multiple apks for different architectures using Gradle

build.gradle

apply plugin: 'com.android.application'

android {

    // To create different apk per abi
    splits {
        abi {
            enable true
            reset()
            include 'armeabi', 'armeabi-v7a', 'x86'
            universalApk true
        }
    }
}

import com.android.build.OutputFile

// Map for the version code
ext.versionCodes = ['armeabi': 1, 'armeabi-v7a': 2, 'x86': 3]
android.applicationVariants.all { variant ->

    // assign different version code for each output
    variant.outputs.each { output ->
        int abiVersionCode = project.ext.versionCodes.get(output.getFilter(OutputFile.ABI)) ?: 0
        output.versionCodeOverride = (abiVersionCode * 1000) + android.defaultConfig.versionCode
    }
}