How to make a countdown timer in Android

Question

I have two EditTexts in XML  In one EditText  the user can put a number as minutes and in another EditText  a number as seconds  After clicking the finish button  the seconds EditText should start to countdown and update its text every second    Additionally  how can I keep it updating until it gets to zero minutes and zero seconds

User · Answer

Here s the solution I used in Kotlin  private fun startTimer         Log d TAG    startTimer  timeString     timeString         object   CountDownTimer TASK SWITCH TIMER  250                override fun onTick millisUntilFinished  Long                        val secondsUntilFinished   Long                Math ceil millisUntilFinished toDouble   1000  toLong               val timeString      TimeUnit SECONDS toMinutes secondsUntilFinished                             02d  format TimeUnit SECONDS toSeconds secondsUntilFinished               Log d TAG    startTimer  CountDownTimer millisUntilFinished    ttlseconds               Log d TAG    startTimer  CountDownTimer millisUntilFinished    millisUntilFinished                       SuppressLint  SetTextI18n           override fun onFinish                         timerTxtVw text    0 00              gameStartEndVisibility true                  start

User · Answer

var futureMinDate   Date       val sdf   SimpleDateFormat  yyyy-MM-dd   Locale ENGLISH      try           futureMinDate   sdf parse  2019-08-22         catch  e  ParseException            e printStackTrace                 Here futureMinDate time Returns the number of milliseconds since January 1  1970  00 00 00 GM        So we need to subtract the millis from current millis to get actual millis     object   CountDownTimer futureMinDate time - System currentTimeMillis    1000            override fun onTick millisUntilFinished  Long                val sec    millisUntilFinished   1000    60             val min    millisUntilFinished    1000   60     60             val hr    millisUntilFinished    1000   60   60     24             val day     millisUntilFinished    1000   60   60     24  toInt               val formattedTimeStr   if  day  gt  1    day days  hr    min    sec              else   day day  hr    min    sec              tvFlashDealCountDownTime text   formattedTimeStr                    override fun onFinish                 tvFlashDealCountDownTime text    Done                   start     Pass a future date and convert it to millisecond    It will work like a charm

User · Answer

if you use the below code  as mentioned in accepted answer    new CountDownTimer 30000  1000         public void onTick long millisUntilFinished            mTextField setText  seconds remaining      millisUntilFinished   1000            here you can have your logic to set text to edittext            public void onFinish             mTextField setText  done              start      It will result in memory leak of the instance of the activity where you use this code  if you don t carefully clean up the references   use the following code    Declare timer CountDownTimer cTimer   null     start timer function void startTimer         cTimer   new CountDownTimer 30000  1000            public void onTick long millisUntilFinished                      public void onFinish                          cTimer start          cancel timer void cancelTimer         if cTimer  null          cTimer cancel        You need to call cTtimer cancel   whenever the onDestroy   onDestroyView   in the owning Activity Fragment is called

User · Answer

just copy paste the following code          MainActivity  package com example countdowntimer   import java util concurrent TimeUnit  import android app Activity  import android os Bundle  import android os CountDownTimer  import android widget TextView    public class MainActivity extends Activity           TextView text1    private static final String FORMAT     02d  02d  02d     int seconds   minutes    Override public void onCreate Bundle savedInstanceState         super onCreate savedInstanceState       setContentView R layout activity main         text1  TextView findViewById R id textView1        new CountDownTimer 16069000  1000       adjust the milli seconds here          public void onTick long millisUntilFinished                 text1 setText    String format FORMAT                      TimeUnit MILLISECONDS toHours millisUntilFinished   TimeUnit MILLISECONDS toMinutes millisUntilFinished  - TimeUnit HOURS toMinutes                      TimeUnit MILLISECONDS toHours millisUntilFinished      TimeUnit MILLISECONDS toSeconds millisUntilFinished  - TimeUnit MINUTES toSeconds                        TimeUnit MILLISECONDS toMinutes millisUntilFinished                                       public void onFinish                 text1 setText  done                      start                             activity main xml    lt RelativeLayout xmlns android  http   schemas android com apk res android   android layout width  match parent   android layout height  match parent   android orientation  vertical   gt    lt TextView     android id    id textView1      android layout width  wrap content      android layout height  wrap content      android layout alignParentLeft  true      android layout alignParentTop  true      android layout marginLeft  34dp      android layout marginTop  58dp      android text  Large Text      android textAppearance   android attr textAppearanceMedium    gt       lt  RelativeLayout gt

User · Answer

Using Kotlin   var timer   object  CountDownTimer 30000  1000            override fun onTick millisUntilFinished  Long                tvTimer setText  seconds remaining      millisUntilFinished   1000                     override fun onFinish                 tvTimer setText  done                    timer start

User · Answer

Output  01 30     new CountDownTimer 90000  1000                 public void onTick long duration                      tTimer setText  seconds remaining      millisUntilFinished   1000                     here you can have your logic to set text to edittext                    Duration                 long Mmin    duration   1000    60                  long Ssec    duration   1000    60                  if  Ssec  lt  10                        tTimer setText      Mmin     0    Ssec                     else tTimer setText      Mmin         Ssec                              public void onFinish                     tTimer setText  00 00                             start

User · Answer

MainActivity java  package com zeustechnocrats countdown   import android os Bundle  import android os Handler  import android support v7 app AppCompatActivity  import android view View  import android widget LinearLayout  import android widget TextView   import java text SimpleDateFormat  import java util Date   public class MainActivity extends AppCompatActivity        private String EVENT DATE TIME    2020-12-31 10 30 00       private String DATE FORMAT    yyyy-MM-dd HH mm ss       private LinearLayout linear layout 1  linear layout 2      private TextView tv days  tv hour  tv minute  tv second      private Handler handler   new Handler        private Runnable runnable        Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout count down            initUI            countDownStart               private void initUI             linear layout 1   findViewById R id linear layout 1           linear layout 2   findViewById R id linear layout 2           tv days   findViewById R id tv days           tv hour   findViewById R id tv hour           tv minute   findViewById R id tv minute           tv second   findViewById R id tv second              private void countDownStart             runnable   new Runnable                  Override             public void run                     try                       handler postDelayed this  1000                       SimpleDateFormat dateFormat   new SimpleDateFormat DATE FORMAT                       Date event date   dateFormat parse EVENT DATE TIME                       Date current date   new Date                        if   current date after event date                             long diff   event date getTime   - current date getTime                            long Days   diff    24   60   60   1000                           long Hours   diff    60   60   1000    24                          long Minutes   diff    60   1000    60                          long Seconds   diff   1000   60                                                     tv days setText String format   02d   Days                            tv hour setText String format   02d   Hours                            tv minute setText String format   02d   Minutes                            tv second setText String format   02d   Seconds                          else                           linear layout 1 setVisibility View VISIBLE                           linear layout 2 setVisibility View GONE                           handler removeCallbacks runnable                                           catch  Exception e                        e printStackTrace                                                       handler postDelayed runnable  0              protected void onStop             super onStop            handler removeCallbacks runnable             activity main xml       lt LinearLayout xmlns android  http   schemas android com apk res android      android layout width  match parent      android layout height  match parent      android background   android color white      android orientation  horizontal  gt        lt LinearLayout         android id    id linear layout 1          android layout width  match parent          android layout height  wrap content          android background   android color black          android gravity  center horizontal          android visibility  gone  gt            lt TextView             android id    id tv event              android layout width  wrap content              android layout height  wrap content              android layout margin  20dp              android text  Android Event Start              android textColor   android color white              android textSize  20dp              android textStyle  normal    gt       lt  LinearLayout gt        lt LinearLayout         android id    id linear layout 2          android layout width  match parent          android layout height  wrap content          android background   android color black          android visibility  visible  gt            lt LinearLayout             android layout width  match parent              android layout height  wrap content              android layout weight  1              android orientation  vertical  gt                lt TextView                 android id    id tv days                  android layout width  wrap content                  android layout height  wrap content                  android layout gravity  center                  android text  00                  android textColor   android color white                  android textSize  20dp                  android textStyle  bold    gt                lt TextView                 android id    id tv days title                  android layout width  wrap content                  android layout height  wrap content                  android layout gravity  center                  android text  Days                  android textColor   android color white                  android textSize  20dp                  android textStyle  normal    gt           lt  LinearLayout gt            lt LinearLayout             android layout width  match parent              android layout height  wrap content              android layout weight  1              android orientation  vertical  gt                lt TextView                 android id    id tv hour                  android layout width  wrap content                  android layout height  wrap content                  android layout gravity  center                  android text  00                  android textColor   android color white                  android textSize  20dp                  android textStyle  bold    gt                lt TextView                 android id    id tv hour title                  android layout width  wrap content                  android layout height  wrap content                  android layout gravity  center                  android text  Hour                  android textColor   android color white                  android textSize  20dp                  android textStyle  normal    gt           lt  LinearLayout gt            lt LinearLayout             android layout width  match parent              android layout height  wrap content              android layout weight  1              android orientation  vertical  gt                lt TextView                 android id    id tv minute                  android layout width  wrap content                  android layout height  wrap content                  android layout gravity  center                  android text  00                  android textColor   android color white                  android textSize  20dp                  android textStyle  bold    gt                lt TextView                 android id    id tv minute title                  android layout width  wrap content                  android layout height  wrap content                  android layout gravity  center                  android text  Minute                  android textColor   android color white                  android textSize  20dp                  android textStyle  normal    gt           lt  LinearLayout gt            lt LinearLayout             android layout width  match parent              android layout height  wrap content              android layout weight  1              android orientation  vertical  gt                lt TextView                 android id    id tv second                  android layout width  wrap content                  android layout height  wrap content                  android layout gravity  center                  android text  00                  android textColor   android color white                  android textSize  20dp                  android textStyle  bold    gt                lt TextView                 android id    id tv second title                  android layout width  wrap content                  android layout height  wrap content                  android layout gravity  center                  android text  Second                  android textColor   android color white                  android textSize  20dp                  android textStyle  normal    gt           lt  LinearLayout gt       lt  LinearLayout gt   lt  LinearLayout gt

User · Answer

Try this way   private void startTimer         startTimer   new CountDownTimer 30000  1000             public void onTick long millisUntilFinished                 long sec    TimeUnit MILLISECONDS toSeconds millisUntilFinished  -  TimeUnit MINUTES toSeconds TimeUnit MILLISECONDS toMinutes millisUntilFinished                  Log e TAG   onTick    sec                tv timer setText String format     02d SEC     sec                if sec    1                                 new Handler   postDelayed new Runnable                          Override                     public void run                             tv timer setText    00 SEC                                               1000                                      public void onFinish                 tv timer setText  Timer finish                    start

User · Answer

public class Scan extends AppCompatActivity   int minute  long min  TextView tv timer   Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity scan2       tv timer findViewById R id tv timer       minute Integer parseInt  Your time in string form like 10        min  minute 60 1000      counter min     private void counter long min        CountDownTimer timer   new CountDownTimer min  1000            public void onTick long millisUntilFinished                int seconds    int   millisUntilFinished   1000    60              int minutes    int    millisUntilFinished    1000   60     60               int hours    int    millisUntilFinished    1000   60   60     24               tv timer setText String format   d  d  d   hours  minutes  seconds                      public void onFinish                 Toast makeText getApplicationContext     Your time has been completed                       Toast LENGTH LONG  show                         timer start

User · Answer

Revers CountDown timer with hours minutes and seconds  public void reverseTimer int Seconds  final TextView tv         new CountDownTimer Seconds   1000   1000  1000             public void onTick long millisUntilFinished                int seconds    int   millisUntilFinished   1000                int hours   seconds    60   60               int tempMint    seconds -  hours   60   60                int minutes   tempMint   60              seconds   tempMint -  minutes   60                tv setText  TIME       String format   02d   hours                              String format   02d   minutes                              String format   02d   seconds                       public void onFinish                 tv setText  Completed                    start

User · Answer

Just Call below function by passing seconds and textview object  public void reverseTimer int Seconds final TextView tv        new CountDownTimer Seconds  1000 1000  1000             public void onTick long millisUntilFinished                int seconds    int   millisUntilFinished   1000               int minutes   seconds   60              seconds   seconds   60              tv setText  TIME       String format   02d   minutes                              String format   02d   seconds                       public void onFinish                 tv setText  Completed                    start

User · Answer

The Interface way   import android os CountDownTimer          Created by saikiran on 07-03-2016      public class CountDownTimerCustom extends CountDownTimer        private TimeTickListener mTickListener      private TimeFinishListener mFinishListener      private long millisUntilFinished       public CountDownTimerCustom long millisInFuture  long countDownInterval            super millisInFuture  countDownInterval               public void updateTickAndFinishListener TimeTickListener tickListener            mTickListener   tickListener             public void updateFinishListner TimeFinishListener listener            mFinishListener   listener             public long getCurrentMs             return millisUntilFinished             public int getCurrentSec             return  int  millisUntilFinished   1000              Override     public void onTick long millisUntilFinished            this millisUntilFinished   millisUntilFinished          if  mTickListener    null              mTickListener onTick millisUntilFinished               Override     public void onFinish             if  mTickListener    null              mTickListener onFinished            mFinishListener onFinished                public interface TimeTickListener           void onTick long mMillisUntilFinished            void onFinished               public interface TimeFinishListener           void onFinished

User · Answer

new CountDownTimer 30000  1000         public void onTick long millisUntilFinished            mTextField setText  seconds remaining      millisUntilFinished   1000            here you can have your logic to set text to edittext            public void onFinish             mTextField setText  done              start      Refer to this link

[android] How to make a countdown timer in Android?

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