MainActivity.kt

class MainActivity : AppCompatActivity() {

    companion object {
        init {
            System.loadLibrary("native-lib")
        }
    }

    private external fun secretKey(): String

    private val superService by lazy {
        SuperService()
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        connectToWebservice()
    }

    private fun connectToWebservice() {
        superService.connect(secretKey())
    }
}