Time.java

// TimeAgo Variables
  private static final int SECOND_MILLIS = 1000;
	private static final int MINUTE_MILLIS = 60 * SECOND_MILLIS;
	private static final int HOUR_MILLIS = 60 * MINUTE_MILLIS;
	private static final int DAY_MILLIS = 24 * HOUR_MILLIS;
	private static final long sAppLoadTime = System.currentTimeMillis();
	private static final String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
	private static final String TIME_ZONE = "UTC";

@SuppressLint("SimpleDateFormat")
  public String getTimeAgo(String jsonString, Context ctx) throws ParseException {
		format = new SimpleDateFormat(DATE_FORMAT);
		format.setTimeZone(TimeZone.getTimeZone(TIME_ZONE));
		railsDate = new Date();
		railsDate = format.parse(jsonString);
		time = railsDate.getTime();
		
	    if (time < 1000000000000L) {
	        // if timestamp given in seconds, convert to millis
	        time *= 1000;
	    }

	    long now = getCurrentTime(ctx);
	    if (time > now || time <= 0) {
	    	time = 0;
	        return null;
	    }

	    // TODO: localize
	    final long diff = now - time;
	    if (diff < MINUTE_MILLIS) {
	        return "akkurat nå";
	    } else if (diff < 2 * MINUTE_MILLIS) {
	        return "mindre enn ett minutt siden";
	    } else if (diff < 50 * MINUTE_MILLIS) {
	        return diff / MINUTE_MILLIS + " minutter siden";
	    } else if (diff < 90 * MINUTE_MILLIS) {
	        return "èn time siden";
	    } else if (diff < 24 * HOUR_MILLIS) {
	        return diff / HOUR_MILLIS + " timer siden";
	    } else if (diff < 48 * HOUR_MILLIS) {
	        return "i går";
	    } else {
	        return diff / DAY_MILLIS + " dager siden";
	    }
	}
	
	public static long getCurrentTime(final Context context) {
        if (BuildConfig.DEBUG) {
            return context.getSharedPreferences("mock_data", Context.MODE_PRIVATE)
                    .getLong("mock_current_time", System.currentTimeMillis())
                    + System.currentTimeMillis() - sAppLoadTime;
        } else {
            return System.currentTimeMillis();
        }
    }