This is a sample build.gradle file for your android libraries to change their artifact file names. You can find more information on http://gunhansancar.com/how-to-change-apk-file-name-in-android/

build.gradle

//apply plugin: 'com.android.library' //uncomment this line for android libraries
//apply plugin: 'com.android.application' //uncomment this line for android applications

def renameArtifact(variant, defaultConfig) {
    variant.outputs.each { output ->
        def formattedDate = new Date().format('yyyyMMddHHmmss')
        def fullName = output.outputFile.name
        def projectName = fullName.substring(0, fullName.indexOf('-'))
        
        output.outputFile = new File(
                (String) output.outputFile.parent,
                (String) output.outputFile.name.replace(projectName, "${projectName}-${defaultConfig.versionName}-${formattedDate}"))
    }
}

android {
    compileSdkVersion 23
    buildToolsVersion '23.0.2'

    //include this line for your android libraries
    //libraryVariants.all { variant -> renameArtifact(variant, defaultConfig) }

    //include this line for your android applications
    //applicationVariants.all { variant -> renameArtifact(variant, defaultConfig) }

    defaultConfig {
        minSdkVersion 10
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }

    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    //include your dependencies
}

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