According to the 4.4 SMS APIs, the new version provides functionality to:
allow apps to read and write SMS and MMS messages on the device
It looks like you would be able to use this class to get it working. The package is Telephony.Sms.Conversations.
Although the following code uses the content provider method, this is now an official API added in API Level 19 (KitKat) for reading the SMS messages.
public List getAllSmsFromProvider() {
List lstSms = new ArrayList();
ContentResolver cr = mActivity.getContentResolver();
Cursor c = cr.query(Telephony.Sms.Inbox.CONTENT_URI, // Official CONTENT_URI from docs
new String[] { Telephony.Sms.Inbox.BODY }, // Select body text
null,
null,
Telephony.Sms.Inbox.DEFAULT_SORT_ORDER); // Default sort order
int totalSMS = c.getCount();
if (c.moveToFirst()) {
for (int i = 0; i < totalSMS; i++) {
lstSms.add(c.getString(0));
c.moveToNext();
}
} else {
throw new RuntimeException("You have no SMS in Inbox");
}
c.close();
return lstSms;
}