B4J Code Snippet Find user documents folder

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B4X:
Sub FindUserDocumentsFolder As String
   If DetectOS = "windows" Then
       Dim jo As JavaObject
       Dim fs As JavaObject = jo.InitializeStatic("javax.swing.filechooser.FileSystemView").RunMethod("getFileSystemView", Null)
       Return fs.RunMethodJO("getDefaultDirectory", Null).RunMethod("getPath", Null)
   Else
       Return GetSystemProperty("user.home", "") & "/Documents"
   End If
End Sub

Sub DetectOS As String
   Dim os As String = GetSystemProperty("os.name", "").ToLowerCase
   If os.Contains("win") Then
       Return "windows"
   Else If os.Contains("mac") Then
       Return "mac"
   Else
       Return "linux"
   End If
End Sub

Tested on Windows and Mac only.
 

ThRuST

Well-Known Member
Licensed User
What is the prefferable way to open the path in explorer/finder

ShowExternalDocument or Shell?
 

DonManfred

Expert
Licensed User
B4X:
Sub Process_Globals
    Private shl As Shell
End Sub

Sub shl.Initialize("Shell","cmd",Array As String("/c", "start", "E:/Basic4android/Projekte/libs.DonManfred/"))
    shl.Run(5000)
End Sub
Sub Shell_ProcessCompleted (Success As Boolean, ExitCode As Int, StdOut As String, StdErr As String)
    Log($"Shell_ProcessCompleted(${Success}, ${ExitCode}, ${StdOut}, ${StdErr})"$)
End Sub
It opens this Folder in my Explorer. Just tested on Windows

slc_externaltools_090.png


Using ShowExternalDocument it works this way

B4X:
fx.ShowExternalDocument(File.GetUri("E:\Basic4android\Projekte\libs.DonManfred", "CalendarView"))

It opens E:\Basic4android\Projekte\libs.DonManfred\CalendarView\


It does work this way too
B4X:
fx.ShowExternalDocument(File.GetUri("E:\Basic4android\Projekte\libs.DonManfred", ""))
It opens E:\Basic4android\Projekte\libs.DonManfred

Based on these two examples i would prefer the ShowExternalDocument Solution as you do not need to start a Shell and a cmd instance.

PS: I cannot say anywhing about Mac; you need to test it.
 
Last edited:

DonManfred

Expert
Licensed User
If you want to Open the Explorer and select a file/Folder

B4X:
Sub Process_Globals
    Private fx As JFX
    Private MainForm As Form
    'Private shl As Shell
    Private NativeMe As JavaObject

End Sub
B4X:
Sub AppStart (Form1 As Form, Args() As String)
    NativeMe = Me
    MainForm = Form1
    MainForm.Show
    NativeMe.RunMethod("OpenExplorer", Array As String(File.Combine("E:\Basic4android\Projekte\libs.DonManfred","CalendarView")))
End Sub
#If java
import java.lang.Runtime;
public static void OpenExplorer(String path){
   try {
       Runtime.getRuntime().exec("explorer.exe /select," + path);
   } catch (Exception e) {
   
}
}
#End If
It opens the Folder E:\Basic4android\Projekte\libs.DonManfred and select the Folder CalendarView

slc_externaltools_091.png
 
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