Product flavor and rename apk example.

build.gradle

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'


android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.example"
        minSdkVersion 19
        targetSdkVersion 28
        versionCode 1
        versionName "2.0.1"
        dataBinding.enabled = true
        multiDexEnabled true
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
	
    buildTypes {
        debug {
            minifyEnabled false
        }
		
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
		
        applicationVariants.all { variant ->
            variant.outputs.all {
                outputFileName = "example-v${variant.versionCode}-${variant.versionName}-${new Date().format('ddMMyy_HHmm')}-${variant.flavorName}-${variant.buildType.name}.apk"
            }
        }
    }

    flavorDimensions "version"
    productFlavors {
        demo {
            dimension "version"
            buildConfigField "String", "SERVER_URL", '"http://example.demo.com/api/v1/"'
            buildConfigField "String", "SERVER_BASE_URL", '"http://example.demo.com/"'
	    versionNameSuffix "-dev"
        }
        live {
            dimension "version"
            buildConfigField "String", "SERVER_URL", '"https://example.live.com/api/v1/"'
            buildConfigField "String", "SERVER_BASE_URL", '"https://example.live.com/"'
	    versionNameSuffix "-live"
        }
    }
    
}

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