Question

I wish to achieve a SMS loopback, i.e. to send and receive SMS from the same application. In order to do so, I have created a class that extends BroadcastReciever, implemented the onReceive() method, and declared the relevant permissions.

I verified the implementation by sending a SMS using telnet.
I want to automate the telnet process, i.e. having the application test itself by sending the SMS. In order to do so, I invoke the following method in the main activity, but the BroadcastReceiver is never called:

private final void sendSMS() {
    final TelephonyManager telMgr = (TelephonyManager)
            getSystemService(Context.TELEPHONY_SERVICE);
    final int len = telMgr.getLine1Number().length(); 
    final String phoneNum = telMgr.getLine1Number().substring(len - 4, len);
    final String msg = "msg"; 
    SmsManager.getDefault().sendTextMessage(phoneNum, null, msg, null, null);
}

Any clue what is wrong…?

UPDATE: Note that the code above is intended for the emulator.

Answer 1

Not sure if I understand you question right, but are you trying send an SMS from the emulator to itself? As far as I know, that is not possible. Just load up another emulator, and send messages between them.

Since telnet commands work, your BroadcastReceiver is probably correctly implemented, but you should probably attach the code for it anyways… Its hard to troubleshoot code you can’t see 🙂