如何使用Android CountDownTimer倒计时

我是新手，也是Android开发新手，我对Android CountDownTimer有疑问。 我怎么能使用Android的CountDownTimer来计算特定的日期，比如2015年第6届Novemeber？ 另外，我如何将Java代码与相应的XML代码一起使用？

我在这个问题上有一个llok（ 如何倒计时 ）并且无法真正理解发生了什么？ 任何人都可以花一点时间来帮助我吗？

谢谢

Answer 1

这正是你如何做到的

更新3

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.your_layout); TextView tv_countdown = (TextView) findViewById(R.id.your_textview_id); Calendar start_calendar = Calendar.getInstance(); Calendar end_calendar = Calendar.getInstance(); long start_millis = start_calendar.getTimeInMillis(); //get the start time in milliseconds long end_millis = end_calendar.getTimeInMillis(); //get the end time in milliseconds long total_millis = (end_millis - start_millis); //total time in milliseconds end_calendar.set(2015, 10, 6); // 10 = November, month start at 0 = January //1000 = 1 second interval CountDownTimer cdt = new CountDownTimer(total_millis, 1000) { @Override public void onTick(long millisUntilFinished) { long days = TimeUnit.MILLISECONDS.toDays(millisUntilFinished); millisUntilFinished -= TimeUnit.DAYS.toMillis(days); long hours = TimeUnit.MILLISECONDS.toHours(millisUntilFinished); millisUntilFinished -= TimeUnit.HOURS.toMillis(hours); long minutes = TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished); millisUntilFinished -= TimeUnit.MINUTES.toMillis(minutes); long seconds = TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished); tv_countdown.setText(days + ":" + hours + ":" + minutes + ":" + seconds); //You can compute the millisUntilFinished on hours/minutes/seconds } @Override public void onFinish() { tv_countdown.setText("Finish!"); } }; cdt.start(); } 

Answer 2

 Date currentDate=new Date(); Date endDate=new Date(); long difference = endDate.getTime() - currentDate.getTime(); new CountDownTimer(difference, 1000) { public void onTick(long millisUntilFinished) { } public void onFinish() { System.out.println("Done"); } }.start(); 

Answer 3

有用的方法！

 @Override public void start(final long miliSecond, final int interval) { new CountDownTimer(miliSecond, interval) { @Override public void onTick(long millisUntilFinished) { long day = TimeUnit.MILLISECONDS.toDays(millisUntilFinished); millisUntilFinished -= TimeUnit.DAYS.toMillis(day); long hour = TimeUnit.MILLISECONDS.toHours(millisUntilFinished); millisUntilFinished -= TimeUnit.HOURS.toMillis(hour); long minute = TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished); millisUntilFinished -= TimeUnit.MINUTES.toMillis(minute); long second = TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished); intDay.setText("" + day); intHour.setText("" + hour); intMinute.setText("" + minute); intSecond.setText("" + second); } @Override public void onFinish() { // What ever you want ! } }.start(); }