B4J Question file modified by ?

M

michaelleewebb

Member
i was wondering if there was anyway for b4j to detect who last modified a file ? ether the computer name or the user name would be good.
 
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zed

Active Member
Licensed User
Try this code to get the system environment.
Maybe something will be useful to you in the results.
B4J: 
Private Sub B4XPage_Created (Root1 As B4XView)
    Root = Root1
    Root.LoadLayout("MainPage")
    
    Dim SystemEnvironment As Map = getSystemEnvironment
    For Each Key As String In SystemEnvironment.Keys
        Log($"${Key} = ${SystemEnvironment.Get(Key)}"$)
    Next
End Sub


Sub getSystemEnvironment As Map
    Dim jo As JavaObject
    jo.InitializeStatic("java.lang.System")
    Dim Env As Map = jo.RunMethod("getenv", Null)
    Return Env
End Sub
 
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M

michaelleewebb

Member
walt61, that seems to be what i'm after, the extended file attributes. the owner is about the best i can do i believe. its been awhile since i worked in b4j and i'm going to have to figure out how to apply the jar file you mentioned and apply it. but it looks right. thanks.
 
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michaelleewebb

Member
i've added the jar and xml to my additional lib folder, i have checked it on in the library manager. but i still don't know how to use it. do you have example code ? do i declare a class of some sorts ? then use it ? seems like i should declare a variable to hold the info. then call a method to get the info.
 
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walt61

Active Member
Licensed User
Longtime User
Just had a look at the codeproject page on which the library is based and it seems it looks for the owner by shelling 'cmd'. I couldn't test it, but have the impression that this should work (it does for e.g. property AbsolutePath; I'm on Linux with Wine, and don't have a 'cmd' there):
B4X: 
    Dim fp As fileproperties
    fp.FileInfo("C:\test.txt") ' This appears to be the equivalent of the trusted 'Initialize' method
    Log(fp.Owner)
 
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DonManfred

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