Android 时钟(由秒转变为时分秒)

int second = 0；

Handler handler = new Handler();
        handler.post(runnable);

Runnable runnable = new Runnable() {
        @Override
        public void run() {
            second++;
            patrol_time_txt.setText(Util.getTime(second));
            handler.postDelayed(runnable, 1000);
        }
    };

//根据秒数转化为时分秒   00:00:00
public static String getTime(int second) {
        if (second < 10) {
            return "00:0" + second;
        }
        if (second < 60) {
            return "00:" + second;
        }
        if (second < 3600) {
            int minute = second / 60;
            second = second - minute * 60;
            if (minute < 10) {
                if (second < 10) {
                    return "0" + minute + ":0" + second;
                }
                return "0" + minute + ":" + second;
            }
            if (second < 10) {
                return minute + ":0" + second;
            }
            return minute + ":" + second;
        }
        int hour = second / 3600;
        int minute = (second - hour * 3600) / 60;
        second = second - hour * 3600 - minute * 60;
        if (hour < 10) {
            if (minute < 10) {
                if (second < 10) {
                    return "0" + hour + ":0" + minute + ":0" + second;
                }
                return "0" + hour + ":0" + minute + ":" + second;
            }
            if (second < 10) {
                return "0" + hour + minute + ":0" + second;
            }
            return "0" + hour + minute + ":" + second;
        }
        if (minute < 10) {
            if (second < 10) {
                return hour + ":0" + minute + ":0" + second;
            }
            return hour + ":0" + minute + ":" + second;
        }
        if (second < 10) {
            return hour + minute + ":0" + second;
        }
        return hour + minute + ":" + second;
    }