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Android SMS messages sent between two emulators are truncated in transit

I could not find the answer to this question. Why is the length of program data sent from one instance of the emulator to another truncated on the receiving side?
Here I am sending 20 bytes from emulator-554 to emulator-556, but emulator-556 accepts only 12 bytes:

emulator-554: SMS sender
/** Send data SMS between two emulators from 15555215554 to 15555215556. */
private void sendSMS()
{
    final int udLength = 20;  // SMS user data length in bytes
    Log.d("SMS TEST", "SMSActivity.sendSMS ud.length=" + udLength);
    byte[] payload = new byte[udLength];
    for (byte i = 0; i < udLength; i++)
    {
        Log.d("SMS TEST", "payload[" + i + "]=" + i);
        payload[i] = i;
    }

    Intent smsSentIntent = new Intent("SMS_SENT");
    PendingIntent sentPI = PendingIntent.getBroadcast(this, 0, smsSentIntent, 0);
    String destTelephone = "15555215556";
    SmsManager smsMgr = SmsManager.getDefault();       
    smsMgr.sendDataMessage(destTelephone, null, (short) 32766, payload, sentPI, null);
    Log.d("SMS TEST", "SMSActivity.sendSMS COMPLETED!");
}

Enter the sender emulator:

02-25 19: 31: 00.793: D/SMS TEST (257): onCreate
02-25 19: 31: 00.793: D/SMS TEST (257): onResume
02-25 19: 31: 00.823: D/SMS TEST (257): SMSActivity.sendSMS ud.length = 20
02-25 19: 31: 00.823: D/SMS TEST (257): [0] = 0
02-25 19: 31: 00.823: D/SMS TEST (257): [1] = 1
02-25 19: 31: 00.823: D/SMS TEST (257): [2] = 2
02-25 19: 31: 00.823: D/SMS TEST (257): [3] = 3
02-25 19: 31: 00.823: D/SMS TEST (257): [4] = 4
02-25 19: 31: 00.823: D/SMS TEST (257): [5] = 5
02-25 19: 31: 00.823: D/SMS TEST (257): [6] = 6
02-25 19: 31: 00.823: D/SMS TEST (257): [7] = 7
02-25 19: 31: 00.833: ​​D/SMS TEST (257): [8] = 8
02-25 19: 31: 00.833: ​​D/SMS TEST (257): [9] = 9
02-25 19: 31: 00.833: ​​D/SMS TEST (257): [10] = 10
02-25 19: 31: 00.833: ​​D/SMS TEST (257): [11] = 11
02-25 19: 31: 00.833: ​​D/SMS TEST (257): [12] = 12
02-25 19: 31: 00.833: ​​D/SMS TEST (257): [13] = 13
02-25 19: 31: 00.833: ​​D/SMS TEST (257): [14] = 14
02-25 19: 31: 00.833: ​​D/SMS TEST (257): [15] = 15
02-25 19: 31: 00.833: ​​D/SMS TEST (257): [16] = 16
02-25 19: 31: 00.833: ​​D/SMS TEST (257): [17] = 17
02-25 19: 31: 00.853: D / SMS TEST (257): payload [18] = 18
02-25 19: 31: 00.853: D / SMS TEST (257): payload [19] = 19
02- 25 19: 31: 00.904: D / SMS TEST (257): SMSActivity.sendSMS COMPLETED!
02-25 19: 31: 27.044: D / SMS TEST (257): onPause
02-25 19: 31: 27.583: D / SMS TEST (257): onStop

emulator-556: SMS receiver
public class SmsReceiver extends BroadcastReceiver
{
    /** BroadcastReceiver listener. */
    @Override
    public void onReceive(Context context, Intent intent)
    {
        if (intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED"))
        {
            Bundle bundle = intent.getExtras();
            Object[] pdus = (Object[]) bundle.get("pdus");
            Log.d("SMS TEST", "SmsReceiver.onReceive: pdus.length=" + pdus.length);
            SmsMessage inboundSMS = SmsMessage.createFromPdu((byte[]) pdus[0]);  // pdus.length==1
            byte[] ud = inboundSMS.getUserData();
            int udLength = ud.length;
            Log.d("SMS TEST", "SmsReceiver.onReceive: ud.length=" + udLength);
            for (int i = 0; i < udLength; i++)
            {
                Log.d("SMS TEST", "ud[" + i + "]=" + ud[i]);
            }
            Log.d("SMS TEST", "SmsReceiver.onReceive COMPLETED!");
        }
    }
}

Log in to the host emulator:

02-25 19: 31: 01.593: D/SMS TEST (258): SmsReceiver.onReceive: pdus.length = 1
02-25 19: 31: 01.613: D/SMS TEST (258): SmsReceiver.onReceive: ud.length = 12
02-25 19: 31: 01.613: D/SMS TEST (258): ud [0] = 0
02-25 19: 31: 01.613: D/SMS TEST (258): ud [1] = 1
02-25 19: 31: 01.613: D/SMS TEST (258): ud [2] = 2
02-25 19: 31: 01.613: D/SMS TEST (258): ud [3] = 3
02-25 19: 31: 01.613: D/SMS TEST (258): ud [4] = 4
02-25 19: 31: 01.613: D/SMS TEST (258): ud [5] = 5
02-25 19: 31: 01.613: D/SMS TEST (258): ud [6] = 6
02-25 19: 31: 01.613: D/SMS TEST (258): ud [7] = 7
02-25 19: 31: 01.613: D/SMS TEST (258): ud [8] = 8
02-25 19: 31: 01.613: D/SMS TEST (258): ud [9] = 9
02-25 19: 31: 01.623: D / SMS TEST (258): ud [10] = 10
02-25 19: 31: 01.623: D / SMS TEST (258): ud [11] = 3
02-25 19 : 31: 01.623: D / SMS TEST (258): SmsReceiver.onReceive COMPLETED!

As you can see, only the first 11 bytes of the data message are received in order.
DDMS emulator control panel options Data=home, Speed=Full, Latency=None.
Usage: Android Development Toolkit 16.0.1.v201112150204-238534
Target AVD:Android 2.2 (API level 8)
Eclipse SDK 3.6.2

Is this an emulator problem? Can anyone repeat this behavior? I have been stuck with this issue for too long. Any help would be really appreciated!

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1 answer

This may be due to the port number. Try using a port number less than 256.

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