public void SendSmsInBackground(string recipient, string message = null)
{
if (!CanSendSmsInBackground)
{
OnSmsDeliveryResult?.Invoke(isSuccessful: false);
return;
}
message ??= string.Empty;
_smsManager = SmsManager.Default;
CONTEXT.RegisterReceiver(this, new IntentFilter(SMS_SENT_INTENT_ACTION));
CONTEXT.RegisterReceiver(this, new IntentFilter(SMS_DELIVERY_INTENT_ACTION));
IList <string> messageParts = _smsManager.DivideMessage(message);
_numberOfSmsMessageParts = messageParts.Count;
_numberOfDeliveredMessageParts = 0;
var sentPendingIntents = new List <PendingIntent>();
var deliveryPendingIntents = new List <PendingIntent>();
var sentPendingIntent = PendingIntent.GetBroadcast(CONTEXT, 0, new Intent(SMS_SENT_INTENT_ACTION), 0);
var deliveredPendingIntent = PendingIntent.GetBroadcast(CONTEXT, 0, new Intent(SMS_DELIVERY_INTENT_ACTION), 0);
for (int i = 0; i < _numberOfSmsMessageParts; i++)
{
sentPendingIntents.Add(sentPendingIntent);
deliveryPendingIntents.Add(deliveredPendingIntent);
}
_smsManager.SendMultipartTextMessage(recipient, null, messageParts, sentPendingIntents, deliveryPendingIntents);
}
private void OnReceiveAction(bool result)
{
UnRegisterBroadcastReceiver();
OnSmsDeliveryResult?.Invoke(isSuccessful: result);
}