ServiceConnection.kt

var randomNumberGeneratorService: RandomNumberGeneratorService? = null
    private lateinit var connection: ServiceConnection
    var bounded = false
    val TAG = MainActivity::class.java.simpleName
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        connection = object : ServiceConnection{
            override fun onServiceDisconnected(componentName: ComponentName) {
                Log.d(TAG,"Service disconnected.")
                randomNumberGeneratorService = null
            }

            override fun onServiceConnected(componentName: ComponentName
                                            , service: IBinder) {
                Log.d(TAG, "Service connected.")
                randomNumberGeneratorService = (service as RandomNumberGeneratorService.RandomNumberGeneratorServiceBinder).service
            }

}