Create PDU for Android

Question

I am currently writing and application, that is sending/receiving SMS messages.

For unit-testing purposes I need to create PDU programmatically. Decoding is quite easy:

Bundle bundle = intent.getExtras();
if (bundle != null) {
    /* Get all messages contained in the Intent*/
    Object[] pdusObj = (Object[]) bundle.get("pdus");
    for (int i = 0; i < pdusObj.length; i++) {
        SmsMessage msg = SmsMessage.createFromPdu((byte[])pdusObj[i]);
    }
}

Is there any appropriate way to create PDU programamtically?

Alkaloid

I'm not clear why you are unit testing the PDU since that is handled by Android. Don't you really want to just test you logic and not googles? – Frow

It is not a matter of whose logic is it. I am testing my application works correctly even if the environment (Mobile Service Provider or device) is not. Currently, I am testing using the straight-forward approach and I would like to start a broadcast 'android.provider.Telephony.SMS_RECEIVED' with Intent and proper bundles attached to test my code works correctly. – Alkaloid

@ibo.ezhe Did you ever successfuly Create a PDU programtically that could be decoded with the createFromPDU() method? I've been dancing around this problem for a week. I have the same question with 50 bounty on it - https://mcmap.net/q/341524/-create-pdu-for-android-that-works-with-smsmessage-createfrompdu-gsm-3gpp – Loftis

Answer 1

Typically PDUs are hardcoded in the code. Similar to this:

String pdu = "07914151551512f2040B916105551511f100006060605130308A04D4F29C0E";
SmsMessage sms = SmsMessage.createFromPdu(HexDump.hexStringToByteArray(pdu));

Here's a complete example on how to do this.

Now, you're gonna ask me "where can I find a PDU for testing?" You generate it. For example, you can use this online service.

I hope this helps!!

Gesso

The little green checkmark makes it automatic, yes. And thanks! – Gesso