将毫秒数转化成时间格式

protected CharSequence getTime(int currentPosition) {
  return new SimpleDateFormat("mm:ss").format(currentPosition);
 }

private void getTime002(Date date) {
  new SimpleDateFormat("yyyy/MM/dd HH:mm:ss").format(date);
 }

getTime(300*1000);//传个int就可以了
getTime002(new Date(System.currentTimeMillis()));//传个date