最简单的技术是使用
DateFormat：
String input = "Sat Feb 17 2012";Date date = new SimpleDateFormat("EEE MMM dd yyyy", Locale.ENGLISH).parse(input);long milliseconds = date.getTime();long millisecondsFromNow = milliseconds - (new Date()).getTime();Toast.makeText(this, "Milliseconds to future date="+millisecondsFromNow, Toast.LENGTH_SHORT).show();一种更困难的技术（基本上可以
DateFormat为您做些什么）涉及您自己解析（这 不会 被视为 最佳实践 ）：
String input = "Sat Feb 17 2012";String[] myDate = input.split("\s+");int year = Integer.parseInt(myDate[3]);String monthString = myDate[1];int mo = monthString.equals("Jan")? Calendar.JANUARY : monthString.equals("Feb")? Calendar.FEBRUARY : monthString.equals("Mar")? Calendar.MARCH : monthString.equals("Apr")? Calendar.APRIL : monthString.equals("May")? Calendar.MAY : monthString.equals("Jun")? Calendar.JUNE : monthString.equals("Jul")? Calendar.JULY : monthString.equals("Aug")? Calendar.AUGUST : monthString.equals("Sep")? Calendar.SEPTEMBER : monthString.equals("Oct")? Calendar.OCTOBER : monthString.equals("Nov")? Calendar.NOVEMBER : monthString.equals("Dec")? Calendar.DECEMBER : 0;int day = Integer.parseInt(myDate[2]);Calendar c = Calendar.getInstance();c.set(year, mo, day);long then = c.getTimeInMillis();Time current_time = new Time();current_time.setTonow();long now = current_time.toMillis(false);long future = then - now;Date d = new Date(future);//TODO use d as you need.Toast.makeText(this, "Milliseconds to future date="+future, Toast.LENGTH_SHORT).show();
