Android Question DateTime question is driving me crazy [Solved]

[Gaxapu]

Hello.

After read some threads in the forum about datetime related questions, I'm yet unable to understand why the next sentence:
Log(DateTime.Time(DateTime.TicksPerMinute * 30))
gives "1:30:00" instead of "00:30:00"

Can anyone, please, explain me?

 

[JordiCP]

Perhaps it is because of the time offset in your zone? (UTC+1)

You can check/comfirm it with

Log(DateTime.Time(0))

 

[Mahares]

gives "1:30:00" instead of "00:30:00"

Your code should be like this:

Dim p As Period =DateUtils.PeriodBetween(0, DateTime.TicksPerMinute * 30)   'need dateutils library
    Log($"$2.0{p.Hours}:$2.0{p.Minutes}:$2.0{p.Seconds}"$)

DateTime.Time(DateTime.TicksPerMinute * 30) is an instance of time at a given old date many decades ago.

 

[Gaxapu]

Perhaps it is because of the time offset in your zone? (UTC+1)

You can check/comfirm it with

Log(DateTime.Time(0))

Yes, I´m in UTC+1
That makes sense.

Thanks

 

[Gaxapu]

Your code should be like this:

Dim p As Period =DateUtils.PeriodBetween(0, DateTime.TicksPerMinute * 30)   'need dateutils library
    Log($"$2.0{p.Hours}:$2.0{p.Minutes}:$2.0{p.Seconds}"$)

DateTime.Time(DateTime.TicksPerMinute * 30) is an instance of time at a given old date many decades ago.

So, should I use "Period" to maintain, and make calculations over, just the Hour:Minute (for a day schedule) ?

Also, I´m intrigued about the notation you used in log. Could you point me to learn more about it?

Tnx a lot.

 

[Mahares]

should I use "Period" to maintain, and make calculations over, just the Hour:Minute (for a day schedule) ?

Here is a code snippet that Erel prefers to the one I posted I think, that will do what you are looking for:

[B4X] Convert milliseconds to string

This code converts milliseconds to hours, minutes and seconds: Sub ConvertMillisecondsToString(t As Long) As String Dim hours, minutes, seconds As Int hours = t / DateTime.TicksPerHour minutes = (t Mod DateTime.TicksPerHour) / DateTime.TicksPerMinute seconds = (t Mod...

www.b4x.com

´m intrigued about the notation you used in log. Could you point me to learn more about it?

Here is the tutorial by Erel on Smart String Literals:

[B4X] Smart String Literal

The "smart string" literal is a more powerful version of the standard string literal. It has three advantages: Supports multi-line strings. No need to escape quotes. Supports string interpolation. The smart string literal starts with $" and ends with "$. Examples: Dim s As String = $"Hello...

www.b4x.com

 

[Erel]

1. Please use [code]code here...[/code] tags when posting code.
2. This code is completely wrong: Log(DateTime.Time(DateTime.TicksPerMinute * 30))
It is explained in the date and time video tutorial: https://www.b4x.com/etp.html
Well worth watching if you are working with dates and times.

If you want to convert milliseconds to string then follow the link @Mahares posted above.