getEnv (local or SystemEnv)

get System Env

val apiKey = System.getenv("TMDB_API") ?: throw IllegalStateException("API Key not set")  
println("from directFromJava: $apiKey")

//on main() fun
val apiKey2 = Config.TMDB_API  
println("TMDB API Key: $apiKey2")
 
 
object Config {  
   val TMDB_API: String = System.getenv("TMDB_API") ?: error("TMDB_API environment variable not set")  
}

getFrom local.properties

on Andorid

you can use in gradle

// Get From local.properties  
fun getApiKey(): String {  
    val props = Properties()  
    val inputStream = FileInputStream("local.properties")  
    props.load(inputStream)  
    return props.getProperty("TMDB_API") ?: throw IllegalStateException("API Key not found")  
}