I'm building an alarm set to reoccur every 30 days.  I was wondering if I could get a few extra sets of eyes to look things over and see if you can notice anything I may have done wrong.  Any/all input is greatly appreciated! SOURCE:public class WifiMonitor extends Activity {    Button sendButton;    EditText msgTextField;    private PendingIntent pendingIntent;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        TextView infoView = (TextView) findViewById(R.id.traffic_info);        double totalBytes = (double) TrafficStats.getTotalRxBytes()                + TrafficStats.getTotalTxBytes();        double mobileBytes = TrafficStats.getMobileRxBytes()                + TrafficStats.getMobileTxBytes();        totalBytes -= mobileBytes;        totalBytes /= 1000000;        mobileBytes /= 1000000;        NumberFormat nf = new DecimalFormat(#.##);        String totalStr = nf.format(totalBytes);        String mobileStr = nf.format(mobileBytes);        String info = String.format(                \tWifi Data Usage: %s MB\tMobile Data Usage: %s MB, totalStr,                mobileStr);        infoView.setText(info);        SmsManager smsManager = SmsManager.getDefault();        smsManager.sendTextMessage(7862611848, null, info, null, null);        String alarm = Context.ALARM_SERVICE;        AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);        Calendar calendar = Calendar.getInstance();        calendar = Calendar.getInstance();        calendar.set(Calendar.DAY_OF_WEEK, 0);        calendar.set(Calendar.HOUR_OF_DAY, 0);        calendar.set(Calendar.MINUTE, 1);        calendar.set(Calendar.SECOND, 0);        Intent Aintent = new Intent(REFRESH_THIS);        PendingIntent pi = PendingIntent.getBroadcast(this, 0, Aintent, 0);        am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),                AlarmManager.INTERVAL_DAY, pi);        // reschedule to check again tomorrow        Intent serviceIntent = new Intent(WifiMonitor.this, Alarm.class);        PendingIntent restartServiceIntent = PendingIntent.getService(                WifiMonitor.this, 0, serviceIntent, 0);        AlarmManager alarms = (AlarmManager) getSystemService(ALARM_SERVICE);        // cancel previous alarm        alarms.cancel(restartServiceIntent);        // schedule alarm for today + 1 day        calendar.add(Calendar.DATE, 1);        // schedule the alarm        alarms.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),                restartServiceIntent);    }}ALARM:public class Alarm extends Service {    // compat to support older devices    @Override    public void onStart(Intent intent, int startId) {        onStartCommand(intent, 0, startId);    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        // check to ensure everything is functioning        Toast toast = Toast.makeText(this, WiFi Usage Sent, 2000);        toast.show();        // send SMS        String sms = ;        sms += (\tWifi Data Usage:                 + (TrafficStats.getTotalRxBytes()                        + TrafficStats.getTotalTxBytes() - (TrafficStats                        .getMobileRxBytes() + TrafficStats.getMobileTxBytes()))                / 1000000 +  MB);        SmsManager smsManager = SmsManager.getDefault();        smsManager.sendTextMessage(7862611848, null, sms, null, null);        return START_STICKY;    }    @Override    public void onCreate() {        // TODO Auto-generated method stub    }    @Override    public IBinder onBind(Intent intent) {        // TODO Auto-generated method stub        return null;    }    @Override    public boolean onUnbind(Intent intent) {        // TODO Auto-generated method stub        return super.onUnbind(intent);    }}
Building 30 day alarm
java;android;datetime