Update Time

private Runnable mUpdate = new Runnable() {
        public void run() {
            boolean firstRun = true;
            while (true) {
                SharedPreferences settings = getSharedPreferences(WindowActivity.PREFS_NAME, 0);
                Calendar newCal = Calendar.getInstance();

                int minutes = newCal.get(Calendar.MINUTE);
                int seconds = newCal.get(Calendar.SECOND);
                int hours = 0;
                if (!settings.getBoolean(h_mode, false)) {
                    hours = newCal.get(Calendar.HOUR_OF_DAY);
                    timeString = String.format("%02d", hours) + ":" + String.format("%02d", minutes);
                } else {
                    hours = newCal.get(Calendar.HOUR);
                    switch (newCal.get(Calendar.AM_PM)) {
                    case 0:
                        timeString = String.format("%02d", hours) + ":" + String.format("%02d", minutes) + "am";
                    case 1:
                        timeString = String.format("%02d", hours) + ":" + String.format("%02d", minutes) + "pm";
                    }
                    ;
                }

                if (firstRun || seconds == 58 || seconds == 59 || seconds == 00) {
                    firstRun = false;
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            timeText.setText(timeString);
                        }
                    });
                } else {
                    synchronized (this) {
                        try {
                            Thread.sleep(58000 - seconds * 1000);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
    };