Android动态显示具体到秒的相聚时间

@Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
 
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
 
    //初始化控件
    info();
 
    //立即调用该方法
    handler.post(runnable);
  }
 
  //立即调用方法
    Handler handler = new Handler();
    Runnable runnable=new Runnable() {
      @Override
      public void run() {
        handler.postDelayed(runnable,1000);
        //计算相恋时间
        culLoveDate();
      }
    };
 
  //初始化控件
  private void info() {
    tvLoveDays= (TextView) findViewById(R.id.tvLoveDays);
    tvLoveHoursMinutesSeconds= (TextView) findViewById(R.id.tvLoveHoursMinutesSeconds);
  }
 
  //计算相恋时间
  private void culLoveDate() {
    SimpleDateFormat dfs=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    long between = 0;
    try {
      Date begin = dfs.parse("2015-04-11 09:09:09"); //设置开始计算时间
      Date end = new Date(System.currentTimeMillis());//获取当前时间
      between = (end.getTime() - begin.getTime());// 得到两者的秒数
    } catch (Exception ex) {
      ex.printStackTrace();
    }
    long day = between / (24 * 60 * 60 * 1000);
    long hour = (between / (60 * 60 * 1000) - day * 24);
    long min = ((between / (60 * 1000)) - day * 24 * 60 - hour * 60);
    long sec = (between / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
    String loveDays="已相恋："+day+"天";
    String loveHoursMinutesSeconds=hour+"时"+min+"分"+sec+"秒";
    tvLoveDays.setText(loveDays);
    tvLoveHoursMinutesSeconds.setText(loveHoursMinutesSeconds);
  }