Xamarin Android Receive and Send SMS more than 160 characters

Question

I'm writting sms application, which get from server by restapi number and message where to send and also receive sms from receipent. I have issue when received sms has more than 160 characters. And issue is when I have more than 160 characters to send by SMS.

Receive sms code:

public override void OnReceive(Context context, Intent intent)
    {
        if (intent.HasExtra("pdus"))
        {
            var smsArray = (Java.Lang.Object[])intent.Extras.Get("pdus");

            foreach(var item in smsArray)
            {
                var sms = SmsMessage.CreateFromPdu((byte[])item);

                SendReceivedStatus(sms.OriginatingAddress, sms.MessageBody);
            }
        }
    }

SendReceivedStatus(sms.OriginatingAddress, sms.MessageBody);

It's a my method that convert to json receipentNumber and message.

Now my send sms code:

var sent = PendingIntent.GetBroadcast(Application.Context, 0, new Intent("SMS_SENT"), 0);

SmsManager.Default.SendTextMessage(responseModel.receipent, null, responseModel.message, sent, null);

protected override void OnResume()
    {
        base.OnResume();

        var smsSentReceiver = new SMSSentReceiver();

        RegisterReceiver(smsSentReceiver, new IntentFilter("SMS_SENT"));
    }

public override void OnReceive(Context context, Intent intent)
    {
        switch ((int)ResultCode)
        {
            case (int)Result.Ok:

                SenderActivity.resultsms = true;
                SendStatus();

                break;
            case (int)SmsResultError.GenericFailure:

                SenderActivity.resultsms = false;
                SendStatus();

                break;
            case (int)SmsResultError.NoService:

                SenderActivity.resultsms = false;
                SendStatus();

                break;
            case (int)SmsResultError.NullPdu:

                SenderActivity.resultsms = false;
                SendStatus();

                break;
            case (int)SmsResultError.RadioOff:

                SenderActivity.resultsms = false;
                SendStatus();

                break;
        }
    }

How to pack these messages?

What is the issue? It is hard to help you when you havn't stated the problem in the first place — Demitrian, Jan 18 '17 at 11:34
I need convert this from java to C#. http://stackoverflow.com/questions/13598725/receive-and-concatenation-sms-more-than-160-characters-in-android — coldzero, Jan 18 '17 at 11:46
I need to receive sms with more than 160 characters to string type. — coldzero, Jan 18 '17 at 11:46

score 3 · Accepted Answer · answered Jan 20 '17 at 03:11

Since SmsMessage.CreateFromPdu((byte[])) is deprecated since Android API level 19, here I also provide method to receive message more than 160 characters after KitKat version, here is my demo:

[BroadcastReceiver(Enabled = true, Label = "SMS Receiver")]
[IntentFilter(new[] { "android.provider.Telephony.SMS_RECEIVED" })]
public class SMSReceiver : BroadcastReceiver
{
    public override void OnReceive(Context context, Intent intent)
    {
        Bundle bundle = intent.Extras;
        if (bundle != null)
        {
            if (Build.VERSION.SdkInt >= BuildVersionCodes.Kitkat)
            {
                SmsMessage[] msgs = Telephony.Sms.Intents.GetMessagesFromIntent(intent);
                var smstext = new StringBuilder();
                foreach (var msg in msgs)
                {
                    smstext.Append(msg.DisplayMessageBody.ToString());
                }
                Console.WriteLine(smstext.ToString());//output the received sms
            }
            else
            {
                var smsArray = (Java.Lang.Object[])bundle.Get("pdus");
                SmsMessage[] messages = new SmsMessage[smsArray.Length];
                for (int i = 0; i < smsArray.Length; i++)
                {
                    messages[i] = SmsMessage.CreateFromPdu((byte[])smsArray[i]);
                }
                StringBuilder content = new StringBuilder();
                if (messages.Length > 0)
                {
                    foreach (var message in messages)
                    {
                        content.Append(message.DisplayMessageBody.ToString());
                    }
                }
                Console.WriteLine(content.ToString());//output the received sms
            }
        }
        Toast.MakeText(context, "Received intent!", ToastLength.Short).Show();
    }
}

I've tested my demo on Android 6.0 device and it works fine, I now can't find a Android 4.0 device for testing, but I think the method should work here. Any problem about this issue, please leave a comment.

Xamarin Android Receive and Send SMS more than 160 characters

1 Answers1