Xamarin Android Receive and Send SMS more than 160 characters - xamarin

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?

Answer 1

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.