科特林发送短信

如何发送短信，在科特林的应用程序

private fun sendSMS(phoneNumber: String, message: String) {
        val sentPI: PendingIntent = PendingIntent.getBroadcast(this, 0, Intent("SMS_SENT"), 0)
        SmsManager.getDefault().sendTextMessage(phoneNumber, null, message, sentPI, null)
    }