Single Tone

Single Tone 선언

class CoinService private constructor() {

    companion object {
        private var instance: CoinService? = null
        private lateinit var context: Context

        fun getInstance(_context: Context): CoinService {
            return instance ?: synchronized(this) {
                instance ?: CoinService().also {
                    context = _context
                    instance = it
                }
            }
        }
    }

    fun Test(){
        Log.d("Coin","Test 1")
    }
}

 

Single Tone 사용

val coinService = CoinService.getInstance(this)
coinService.Test()