Countdown timer with pause and resume

Question

I want to do countdown timer with pause and restart.Now i am displaying countdown timer By implenting ontick() and onfinish().please help me out.HEre is th code for countdow

Answer 1

My first answer on stackOverFlow, hope it should help :) ... This is how I solved the problem, control timer from Fragment, Bottomsheet, Service, Dialog as per your requirement, keep a static boolean variable to control.

declare in your Activity:

long presetTime, runningTime;    
Handler mHandler =new Handler();    
Runnable countDownRunnable;
Toast toastObj;
public static boolean shouldTimerRun = true;
TextView counterTv;

In onCreate:

presetTime =60000L;
runningTime= presetTime;
//setting up Timer
countDownRunnable=new Runnable() {
       @Override
         public void run() {
          if (shouldTimerRun) //if false, it runs but skips counting
          {
                counterTv.setText(simplifyTimeInMillis(runningTime));
             if (runningTime==0) {
                 deployToast("Task Completed"); //show toast on task completion 
                }
             runningTime -= 1000;
             presetTime = runningTime; //to resume the timer from last position
          }
          mHandler.postDelayed(countDownRunnable,1000); //simulating on-tick
         }
    };
mHandler.post(countDownRunnable); // Start our CountdownTimer

Now, whenever you want to pause the timer change the value of shouldTimerRun false and to resume make it true.

@Override
    public void onResume() {
        super.onResume();
        shouldTimerRun=true;
    }

    @Override
    public void onPause() {
        super.onPause();
        shouldTimerRun=false;
        deployToast("Timer is paused !!");
    }

Helping methods: (can be skipped)

public static String simplifyTimeInMillis(long time) {

        String result="";
        long difference = time;
        long secondsInMilli = 1000;
        long minutesInMilli = secondsInMilli * 60;
        long hoursInMilli = minutesInMilli * 60;

        if (difference<1000){
            return "0";
        }

        if (difference>=3600000) {
            result = result + String.valueOf(difference / hoursInMilli) + "hr ";
            difference = difference % hoursInMilli;
        }
        if (difference>=60000) {
            result = result + String.valueOf(difference / minutesInMilli) + "m ";
            difference = difference % minutesInMilli;
        }
        if (difference>=1000){
            result = result + String.valueOf(difference / secondsInMilli) + "s";
        }

        return result;
    }

public void deployToast(String msg){
        if (toastObj!=null)
            toastObj.cancel();
        toastObj = Toast.makeText(mContext,msg,Toast.LENGTH_SHORT);
        toastObj.show();
    }