Android Question Parse date crash

A

App Dude

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This mostly works, but sometimes it crashes. Anyone know why?
B4X: 
Main.depTime = DateTime.DateParse(cbSelDate.SelectedItem) + (cbSelHour.SelectedItem * DateTime.TicksPerHour) + (cbSelMin.SelectedItem * DateTime.TicksPerMinute)




More context: I created a date-time picker which, for user simplicity, has only the next 5 days in a comboBox to select from., and hours and minutes in other comboBoxes. The dates in the date comboBox are in the format "Mon 11/01/2021".

For now, I've worked around it by saving the date of the first item in the date comboBox as ticks in a variable, and using that plus selected index to calculate the selected date in ticks.
 
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D

Deleted member 103

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What does this result look like?
B4X: 
log(cbSelDate.SelectedItem)
log(cbSelHour.SelectedItem)
log(cbSelMin.SelectedItem)
 
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A

App Dude

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The crash report indicates that the date is the issue, not the hours or minutes, but the same date will work most of the time.
 
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Deleted member 103

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and what does that output ?
B4X: 
DateTime.DateParse(cbSelDate.SelectedItem)
 
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D

Deleted member 103

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this one works
B4X: 
    DateTime.DateFormat="EEE MM/dd/yyyy"
    Log(DateTime.DateParse("Montag 11/01/2021"))

but this one does not
B4X: 
    DateTime.DateFormat="EEE MM/dd/yyyy"
    Log(DateTime.DateParse("Mon 11/01/2021"))
 
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A

App Dude

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So it works 9 out of 10 times, and when it crashes, I can re-do it with the same date and it works.
You can see in the crash that it has a properly formatted date. I suspect the answer will come from the Java dump, but I don't know what that's saying.
 
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A

App Dude

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This is how I create the list...

B4X: 
        ' Create list of allowed dates...
        Dim selDateList As List
        selDateList.Initialize
        DateTime.DateFormat = "E MM/dd/yyyy"
        Dim i As Int
        For i = 0 To 4
            selDateList.Add(DateTime.Date(DateTime.Now + (DateTime.TicksPerDay * i)))
        Next
        cbSelDate.setitems(selDateList)
 
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M

Mahares

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Android Dude said:
This (highlighted) is what's baffling me...
Click to expand...
DateTime.DateFormat= "E MM/dd/yyyy" is also correct format. I tested the format. I am baffled too. Maybe if you can attach a little project to reproduce it. Maybe we can see what you are seeing.
 
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TILogistic

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?
not problem
ref:
B4X: 
'    Create list of allowed dates...
    Dim selDateList As List
    selDateList.Initialize
    
    DateTime.DateFormat = "E MM/dd/yyyy"
    
    Log($"DateFormat: ${DateTime.DateFormat}"$)
    Log($"Device DateFormat: ${DateTime.DeviceDefaultDateFormat}"$)
    Log($"Device TimeFormat: ${DateTime.DeviceDefaultTimeFormat}"$)

    For i = 0 To 29
        selDateList.Add(DateTime.Date(DateTime.Now + (DateTime.TicksPerDay * i)))
    Next

    For Each s As String In selDateList
        Dim ticks As Long = DateTime.DateParse(s)
        Dim Date As String = DateTime.Date(DateTime.DateParse(s))
        Log($"List: ${s} / Ticks: ${ticks} / Date: ${Date}"$)
    Next

 
Last edited:
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TILogistic

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I think the problem must be when you assign the dates in the list and in the combo box as a string with the format "E MM/dd/yyyy".

That means you have to rescue the data from the combo box and the list with the format used.

If I use the "E MM/dd/yyyy" format, you must assign this format before converting it to ticks.

sample:
B4X: 
DateTime.DateFormat="E MM/dd/yyyy"
Main.depTime = DateTime.DateParse(cbSelDate.SelectedItem) + (cbSelHour.SelectedItem * DateTime.TicksPerHour) + (cbSelMin.SelectedItem * DateTime.TicksPerMinute)

Note:
You must consider the language if you assign dates in string format.

English: Mon 11/01/2021
Spanish: Lun 11/01/2021
 
Last edited:
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E

emexes

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Android Dude said:
So it works 9 out of 10 times, and when it crashes, I can re-do it with the same date and it works.
Click to expand...
That's weird. I'd be banging away at this angle. Perhaps it happens after you've used n different dates, and when you restart the program and re-enter the date that crashed it just previously, the "crash after n different dates" feature counter ? has reset to zero.
 
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