[안드로이드] kotlin uuid 생성코드

    private fun deviceId(): String? {
        val deviceIdKey = "makeDeviceID"
        val sharedPreferences = getSharedPreferences("AppDate", 0)
        var deviceId = sharedPreferences.getString(deviceIdKey, null)
        if (deviceId == null) {
            deviceId = retrieveDeviceId()
            if (deviceId == null) {
                deviceId = retrieveAndroidIdOrGenerateUUID()
            }
            val editor = sharedPreferences.edit()
            editor.putString(deviceIdKey, deviceId)
            editor.commit()
        }
        return deviceId
    }


private fun retrieveDeviceId(): String? {
    return try {
        val telephonyManager =
            this.getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager
        if (Build.VERSION.SDK_INT < 26) {
            telephonyManager.deviceId
        } else {
            telephonyManager.imei
        }
    } catch (e: Exception) {
        // Handle exception (log if necessary)
        null
    }
}

private fun retrieveAndroidIdOrGenerateUUID(): String? {
    try {
        val androidId = Settings.Secure.getString(
            this.contentResolver,
            Settings.Secure.ANDROID_ID
        )
        if (androidId != null && androidId.isNotEmpty()) {
            return androidId
        }
    } catch (e: Exception) {
        // Handle exception (log if necessary)
    }
    return UUID.randomUUID().toString().replace("-".toRegex(), "")
}