Android Countdown Timer to Date

问题:

I am trying to make a countdown timer for a game/date in android. I want to create a timer that displays the days, hours, minutes, and seconds to a date I specify with a final variable. The timer then sets text views to show the days, hours, minutes, and seconds to the user.

Any suggestions about how I could code this?

回答1:

CountDownTimer that will display the time formatted to hours,minute,days,and seconds.

 public class DemotimerActivity extends Activity {
        /** Called when the activity is first created. */
         TextView tv;
         long diff;
         long oldLong;
         long NewLong;
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            tv = new TextView(this);
            this.setContentView(tv);
            SimpleDateFormat formatter = new SimpleDateFormat("dd.MM.yyyy, HH:mm");
            String oldTime = "19.02.2018, 12:00";//Timer date 1
            String NewTime = "20.02.2018, 14:00";//Timer date 2
            Date oldDate, newDate;
            try {
                oldDate = formatter.parse(oldTime);
                newDate = formatter.parse(NewTime);
                oldLong = oldDate.getTime();
                NewLong = newDate.getTime();
                diff = NewLong - oldLong;
           } catch (ParseException e) {
                e.printStackTrace();
       }
         MyCount counter = new MyCount(diff, 1000);
         counter.start();
    }


    // countdowntimer is an abstract class, so extend it and fill in methods
    public class MyCount extends CountDownTimer {
    MyCount(long millisInFuture, long countDownInterval) {
        super(millisInFuture, countDownInterval);
    }

    @Override
    public void onFinish() {
        txtNumber1.setText("done!");
    }

    @Override
    public void onTick(long millisUntilFinished) {
         long millis = millisUntilFinished;
        String hms = (TimeUnit.MILLISECONDS.toDays(millis)) + "Day "
                + (TimeUnit.MILLISECONDS.toHours(millis) - TimeUnit.DAYS.toHours(TimeUnit.MILLISECONDS.toDays(millis)) + ":")
                + (TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)) + ":"
                + (TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis))));
        txtNumber1.setText(/*context.getString(R.string.ends_in) + " " +*/ hms);
    }
}

    }

回答2:

Try this one:

SimpleDateFormat formatter = new SimpleDateFormat("dd.MM.yyyy, HH:mm:ss");
        formatter.setLenient(false);


        String endTime = "25.06.2017, 15:05:36"

        Date endDate;
        try {
            endDate = formatter.parse(endTime);
            milliseconds = endDate.getTime();

        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

         startTime = System.currentTimeMillis();

         diff = milliseconds - startTime;


           mCountDownTimer = new CountDownTimer(milliseconds, 1000) {
            @Override
            public void onTick(long millisUntilFinished) {

                startTime=startTime-1;
                Long serverUptimeSeconds =
                        (millisUntilFinished - startTime) / 1000;

                String daysLeft = String.format("%d", serverUptimeSeconds / 86400);
                txtViewDays.setText(daysLeft);

                String hoursLeft = String.format("%d", (serverUptimeSeconds % 86400) / 3600);
                txtViewHours.setText(hoursLeft);

                String minutesLeft = String.format("%d", ((serverUptimeSeconds % 86400) % 3600) / 60);

                txtViewMinutes.setText(minutesLeft);

                String secondsLeft = String.format("%d", ((serverUptimeSeconds % 86400) % 3600) % 60);
                txtViewSecond.setText(secondsLeft);


            }

            @Override
            public void onFinish() {

            }
        }.start();

    }

回答3:

Here is an Android built-in CountDownTimer that will display the time formatted to your days, hours, minutes, and seconds all in a TextView:

public class Example extends Activity {
    CountDownTimer mCountDownTimer;
    long mInitialTime = DateUtils.DAY_IN_MILLIS * 2 + 
                        DateUtils.HOUR_IN_MILLIS * 9 +
                        DateUtils.MINUTE_IN_MILLIS * 3 + 
                        DateUtils.SECOND_IN_MILLIS * 42;
    TextView mTextView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mTextView = (TextView) findViewById(R.id.empty);

        mCountDownTimer = new CountDownTimer(mInitialTime, 1000) {
            StringBuilder time = new StringBuilder();
            @Override
            public void onFinish() {
                mTextView.setText(DateUtils.formatElapsedTime(0));
                //mTextView.setText("Times Up!");
            }

            @Override
            public void onTick(long millisUntilFinished) {
                time.setLength(0);
                 // Use days if appropriate
                if(millisUntilFinished > DateUtils.DAY_IN_MILLIS) {
                    long count = millisUntilFinished / DateUtils.DAY_IN_MILLIS;
                    if(count > 1)
                        time.append(count).append(" days ");
                    else
                        time.append(count).append(" day ");

                    millisUntilFinished %= DateUtils.DAY_IN_MILLIS;
                }

                time.append(DateUtils.formatElapsedTime(Math.round(millisUntilFinished / 1000d)));
                mTextView.setText(time.toString());
            }
        }.start();
    }
}

回答4:

Take a look at this post, I think it will help you out: How to check day in android?

Using the java.util.Calendar class, I think you should be able to figure out how to do the rest.

http://developer.android.com/reference/java/util/Date.html -- you can use the getDate(), getHours(), getMinutes(), getSeconds(), etc... Hope that helps!

回答5:

Is this software your using pure code or AppInventor? Here's coding resources.

Here's one resource: [http://w2davids.wordpress.com/simple-countdowntimer-example/][1]

A second (local) resource: Countdown Timer required on Android

回答6:

long startTime;

private void start_countdown_timer()
{
    SimpleDateFormat formatter = new SimpleDateFormat("dd.MM.yyyy, HH:mm:ss");
    formatter.setLenient(false);


    String endTime = "18.09.2017, 15:05:36";
    long milliseconds=0;

    final CountDownTimer mCountDownTimer;

    Date endDate;
    try {
        endDate = formatter.parse(endTime);
        milliseconds = endDate.getTime();

    } catch (ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    startTime = System.currentTimeMillis();


    mCountDownTimer = new CountDownTimer(milliseconds, 1000) {
        @Override
        public void onTick(long millisUntilFinished) {

            startTime=startTime-1;
            Long serverUptimeSeconds =
                    (millisUntilFinished - startTime) / 1000;

            String daysLeft = String.format("%d", serverUptimeSeconds / 86400);
            //txtViewDays.setText(daysLeft);
            Log.d("daysLeft",daysLeft);

            String hoursLeft = String.format("%d", (serverUptimeSeconds % 86400) / 3600);
            //txtViewHours.setText(hoursLeft);
            Log.d("hoursLeft",hoursLeft);

            String minutesLeft = String.format("%d", ((serverUptimeSeconds % 86400) % 3600) / 60);
            //txtViewMinutes.setText(minutesLeft);
            Log.d("minutesLeft",minutesLeft);

            String secondsLeft = String.format("%d", ((serverUptimeSeconds % 86400) % 3600) % 60);
            //txtViewSecond.setText(secondsLeft);
            Log.d("secondsLeft",secondsLeft);


        }

        @Override
        public void onFinish() {

        }
    }.start();


}