How do I start chronometer with a specific starting time?

Question

Let's say I have this variable:

long myMillis = 20000;

This means that I want my Chronometer to start at exactly 20 seconds (00:20).

I tried doing this:

chronometer.setBase(myMillis);

But it doesn't work. It dosn't start with 20 seconds. It starts with some weird time that doesn't make sense.

Possible duplicate of [Android: Chronometer SetBase in minutes](http://stackoverflow.com/questions/14788242/android-chronometer-setbase-in-minutes) — giannisf, Jun 30 '16 at 21:49

giannisf · Accepted Answer · 2016-06-30T21:49:58.463

6

In general the chronometer works like this (if you would like to set the Base to a specific nr):

mChronometer.setBase(SystemClock.elapsedRealtime() - (nr_of_min * 60000 + nr_of_sec * 1000)))

so make it:

 mChronometer.setBase(SystemClock.elapsedRealtime() - (2* 60000 + 0 * 1000)))

edited Jun 30 '16 at 21:49

answered Jun 30 '16 at 21:36

giannisf

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Thank you! It worked. But I have no idea why it has to be this complicated. If anyone has an explanation, that would be great. – Guy Jun 30 '16 at 22:01
@Whiz You can read the official documentation https://developer.android.com/reference/android/widget/Chronometer.html – giannisf Jun 30 '16 at 22:02

Kishan Solanki · Answer 2 · 2021-01-05T08:41:24.840

6

For Kotlin,

To start Chronometer with starting time 20 seconds, you can use

val timeInMilSeconds = 20000
chronometer.base = SystemClock.elapsedRealtime() - timeInMilSeconds
chronometer.start()

This will start Chronometer with starting time 20 seconds i.e. 00:00:20

edited Jan 05 '21 at 08:41

answered May 21 '18 at 06:15

Kishan Solanki

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Thanks for the easy and understandable solution. – Ramanand Prajapati Sep 27 '22 at 12:58

score 5 · Answer 3 · edited Sep 02 '16 at 15:24

Its Late but may help others. I have used following code in first fragment

chronometerTimer.setBase(SystemClock.elapsedRealtime());
chronometerTimer.start();

and then move on some condition to next fragment where chornometer should start at same time of previous chornometer ends, i get elapsed time using this code.

long elapsedMillis = SystemClock.elapsedRealtime() - chronometerTimer.getBase();

and i send elapsedMilis in next fragment and use following code

chronometerTimer.setBase(SystemClock.elapsedRealtime() - elapsedTime);
chronometerTimer.start();

it worked perfectly.

How do I start chronometer with a specific starting time?

3 Answers3

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