1.sendMultipartTextForSubscriber

frameworks\opt\telephony\src\java\com\android\internal\telephony\UiccSmsController.java

public void sendMultipartTextForSubscriber(int subId, String callingPackage, String destAddr,
            String scAddr, List<String> parts, List<PendingIntent> sentIntents,
            List<PendingIntent> deliveryIntents, boolean persistMessageForNonDefaultSmsApp)
            throws android.os.RemoteException {
        IccSmsInterfaceManager iccSmsIntMgr = getIccSmsInterfaceManager(subId);
        if (iccSmsIntMgr != null ) {
            iccSmsIntMgr.sendMultipartText(callingPackage, destAddr, scAddr, parts, sentIntents,
                    deliveryIntents, persistMessageForNonDefaultSmsApp);
        } else {
            Rlog.e(LOG_TAG,"sendMultipartTextForSubscriber iccSmsIntMgr is null for" +
                          " Subscription: " + subId);
            sendErrorInPendingIntents(sentIntents, SmsManager.RESULT_ERROR_GENERIC_FAILURE);
        }
}

2.sendMultipartText

frameworks\opt\telephony\src\java\com\android\internal\telephony\IccSmsInterfaceManager.java

public void sendMultipartText(String callingPackage, String destAddr, String scAddr,
            List<String> parts, List<PendingIntent> sentIntents,
            List<PendingIntent> deliveryIntents, boolean persistMessageForNonDefaultSmsApp) {
        //權(quán)限
        mPhone.getContext().enforceCallingPermission( 
                Manifest.permission.SEND_SMS,
                "Sending SMS message");
        //默認(rèn)信息應(yīng)用
        if (!persistMessageForNonDefaultSmsApp) {
            // Only allow carrier app or carrier ims to skip auto message persistence.
            enforcePrivilegedAppPermissions();
        }
        
        if (mAppOps.noteOp(AppOpsManager.OP_SEND_SMS, Binder.getCallingUid(),
                callingPackage) != AppOpsManager.MODE_ALLOWED) {
            return;
        }

        destAddr = filterDestAddress(destAddr);

        if (parts.size() > 1 && parts.size() < 10 && !SmsMessage.hasEmsSupport()) {
            for (int i = 0; i < parts.size(); i++) { //每個(gè)part發(fā)送一次
                // If EMS is not supported, we have to break down EMS into single segment SMS
                // and add page info " x/y".
                String singlePart = parts.get(i);
                if (SmsMessage.shouldAppendPageNumberAsPrefix()) {
                    singlePart = String.valueOf(i + 1) + '/' + parts.size() + ' ' + singlePart;
                } else {
                    singlePart = singlePart.concat(' ' + String.valueOf(i + 1) + '/' + parts.size());
                }

                PendingIntent singleSentIntent = null;
                if (sentIntents != null && sentIntents.size() > i) {
                    singleSentIntent = sentIntents.get(i);
                }

                PendingIntent singleDeliveryIntent = null;
                if (deliveryIntents != null && deliveryIntents.size() > i) {
                    singleDeliveryIntent = deliveryIntents.get(i);
                }

                mDispatcher.sendText(destAddr, scAddr, singlePart,
                        singleSentIntent, singleDeliveryIntent,
                        null/*messageUri*/, callingPackage,
                        persistMessageForNonDefaultSmsApp);
            }
            return;
        }

        mDispatcher.sendMultipartText(destAddr, scAddr, (ArrayList<String>) parts,
                (ArrayList<PendingIntent>) sentIntents, (ArrayList<PendingIntent>) deliveryIntents,
                null/*messageUri*/, callingPackage, persistMessageForNonDefaultSmsApp);
}

3.sendText

frameworks\opt\telephony\src\java\com\android\internal\telephony\ImsSMSDispatcher.java

public void sendText(String destAddr, String scAddr, String text, PendingIntent sentIntent,
            PendingIntent deliveryIntent, Uri messageUri, String callingPkg,
            boolean persistMessage) {
        Rlog.d(TAG, "sendText");
        if (isCdmaMo()) { //CdmaSMSDispatcher
            mCdmaDispatcher.sendText(destAddr, scAddr,
                    text, sentIntent, deliveryIntent, messageUri, callingPkg, persistMessage);
        } else { //GsmSMSDispatcher
            mGsmDispatcher.sendText(destAddr, scAddr,
                    text, sentIntent, deliveryIntent, messageUri, callingPkg, persistMessage);
        }
    }