Android – Listen for incoming SMS messages

public class SMSApp extends IntentReceiver {
private static final String LOG_TAG = "SMSApp";

/* package */ static final String ACTION =
"android.provider.Telephony.SMS_RECEIVED";

public void onReceiveIntent(Context context, Intent intent) {
if (intent.getAction().equals(ACTION)) {
StringBuilder buf = new StringBuilder();
Bundle bundle = intent.getExtras();

if (bundle != null) {
SmsMessage[] messages = Telephony.Sms.Intents.getMessagesFromIntent(intent);
for (int i = 0; i < messages.length; i++) {
SmsMessage message = messages[i];
buf.append("Received SMS from ");
buf.append(message.getDisplayOriginatingAddress());
buf.append(" - ");
buf.append(message.getDisplayMessageBody());
}
}
Log.i(LOG_TAG, "[SMSApp] onReceiveIntent: " + buf);
NotificationManager nm = (NotificationManager) context.getSystemService(
Context.NOTIFICATION_SERVICE);

nm.notifyWithText(123, buf.toString(),
NotificationManager.LENGTH_LONG, null);

}
}

private void appendData(StringBuilder buf, String key, String value) {
buf.append(", ");
buf.append(key);
buf.append('=');
buf.append(value);
}
}