B4J Question [SOLVED] DateTime ticks... to time (dumb question)

[Magma]

Hi there..

I want to use slider to move on time... so i ve created slider with max values of 86400 (seconds of day)

I know that ticks per day goes at 86400000 (millions)

So i am calculating *1000..

The code i am using is:

    ttime.Text=DateTime.Time(Value*1000)
'value is from silder

The bad thing is when have 0 value return at textfield 02:00:00 - so i am thinking that may be use zone time..

What to do ? just subtract the time ? or there is a better way to check..

 

[Cableguy]

Use timeparse methods.
You also have ticks to minutes and minutes to ticks methods

 

[Magma]

i don't want transform time to ticks... i want a value 0 to 86400(000) to transformed into time... So i want 0 to represents 00:00:00 and not 02:00:00...

 

[Cableguy]

Each second is 1000 ticks, so each minute is 60 000 ticks, and so on...
Date time has methods that allow you to get the tick count from a string like "00H05m42s" and also can provide the time string from a ticks count...
Do explore the DateTime keyword and methods, they are what you need

 

[Magma]

Oh i know that but i am telling other thing... i have a slider from 0 to 86400 (*1000) that represent ticks...

So when i am changing value to 0 - i want return time 00:00:00 but returns me 02:00:00 -- so the best way is to subtract it ? or do something else ..

 

[Cableguy]

Check this thread

https://www.b4x.com/android/forum/threads/periodbetween-string-and-datetime-now.42201/

 

[Magma]

    Dim tt As Int
    tt=DateTime.TicksPerHour*2
    ttime.Text=DateTime.Time((Value*1000)-tt)

This works for me... don't know if in other time zone will have problem...


slider max value set it to 86399 (because starts from 0)

 

[Ed Brown]

I've just checked this too and you're right. It does include the timezone offset.

Change it to

tt=DateTime.TicksPerHour * DateTime.TimeZoneOffset

 

[Cableguy]

...
Do explore the DateTime keyword and methods, they are what you need...

 

[Magma]

@Ed Brown ... the TimeZoneOffset gives 3 hours... but because it's summer we have 2:00 hours (Athens Greece) or i am not right... ?

but TimeZoneoffset gives only the 03:00 difference..

 

[Magma]

    tt=DateTime.TicksPerHour*DateTime.GetTimeZoneOffsetAt(DateTime.Now)

This could be... but DateTime.GetTimeZoneOffsetAt(DateTime.Now) -- gives... 3 :-(

 

[Cableguy]

you can try to use "settimezone" method...

something like (pseudo code)

dim gtz as datetime.gettimezone 'this way we can after reset the timezone
datetime.settimezone(0h) 'we set te timezone to 0
Do our maths here
datetime.settimezone = gtz ' we reset the timezone to its original value

 

[Magma]

Seems better that..