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.

Answer 1

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)))