When I send SMS, sometimes result code = 0. What does that code mean?

Question

smsManager.sendMultipartTextMessage(
                mDests[i], mServiceCenter, messages,
                sentIntents, deliveryIntents);

In my SmsReceiver (sentIntents) sometimes I receive getResultCode() = 0.

According to the documentation: http://developer.android.com/reference/android/telephony/SmsManager.html

It means STATUS_ON_ICC_FREE. But I can't understand what it is. When it is returned - SMS are not sent.

What does this mean and how to fix it? What is the reason for STATUS_ON_ICC_FREE?

Answer 1

You're just comparing result code to the wrong constant. SmsManager.sendMultipartTextMessage Javadoc clearly states about the possible values returned by the getResultCode() in the sentIntents broadcast:

The result code will be Activity.RESULT_OK for success, or one of these errors:
RESULT_ERROR_GENERIC_FAILURE
RESULT_ERROR_RADIO_OFF
RESULT_ERROR_NULL_PDU

In my opinion STATUS_ON_ICC_xxx constants were added to the public API by mistake since they are used only by hidden methods of the SmsManager class: copyMessageToIcc, deleteMessageFromIcc etc.

UPDATE

However this doesn't explain why do you receive 0 from getResultCode(). As neither of these constant is equal to zero (Activity.RESULT_CANCEL = 0 but there is no mention of it in the SmsManager javadoc). Quick search through Android Sources also doesn't give any clue were 0 could come from.

One possibility could be that some other application catch the sentIntent broadcast and call setResultCode explicitly. However I was sure up to now that it's impossible in Android to prevent the SMS from being sent at the application level.

Answer 2

The javadoc says Free space (TS 51.011 10.5.3 / 3GPP2 C.S0023 3.4.27).. The 3GPP2 specifications say

I don't know anything about SMS, but from what I understand, this "free space" is opposed to the "used space" (xx1 that actually defines statuses such as 001 received & read ; 011 receveid & to be read ; etc.)

I would says this status does not mean anything...

In the Android code, I have found only one reference to STATUS_ON_ICC_FREE: deleteMessageFromIcc() updates the message with this status when the message has successfully been deleted from the SIM card (aka ICC)