Android Question DirRootExternal

lymey · Sep 24, 2013

Hi!
I am writing an app that creates a directory off DirRootExternal. The problem is that on some devices this equates to mnt/sdcard and others mnt/local. In other words the external directory is on a removable card in the first case, and not in the second.

How can I determine if the actual location is the 'fixed' (mnt/local) directory, or the actual removable sdcard directory (mnt/sdcard) on a device that has both?

NJDude · Sep 24, 2013

DirRootExternal points to the INTERNAL SDCard, external SDCards are not really standard, there are several discussions about, it if you are curious, search the forums.

margret · Sep 24, 2013

You can try this code:

B4X:

Sub DevicePaths
     Dim lp, dPaths As List : Dim ChkVal, dp = File.DirRootExternal As String : dPaths.Initialize
     lp = File.ReadList("/system/etc/", "vold.fstab")
     For i = 0 To lp.Size -1
          ChkVal = lp.get(i) : ChkVal = ChkVal.Replace(":", " ")
          If ChkVal.ToLowerCase.StartsWith("dev_mount") Then
               dPaths.Add(SGW(ChkVal, 2) & ", " & SGW(ChkVal, 3))
          EndIf
     Next
     InputList(dPaths, "Device Mounting Paths", -1)
End Sub
Sub SGW(CStr As String, GE As Int) As String
     Dim t As List : Dim rs, sd As String : sd = " "
     t = Regex.Split(sd, CStr)
     rs = t.Get(GE-1)
     Return rs
End Sub

NJDude · Sep 24, 2013

Note that this code doesn't work on Jelly Bean (4.3).

margret · Sep 24, 2013

Thanks NJDude. I didn't know that as the latest version I have is 4.0.3. Are there any updates or new options for Jelly Bean?

NJDude · Sep 24, 2013

The way it's done and the permissions have changed, read THIS document.

I mentioned on my previous post that external storage is not standard because Android only supports the internal SDCard, access to the external is usually exposed by the manufacturer.

lymey · Sep 27, 2013

margret said:

You can try this code:

B4X:

Sub DevicePaths
     Dim lp, dPaths As List : Dim ChkVal, dp = File.DirRootExternal As String : dPaths.Initialize
     lp = File.ReadList("/system/etc/", "vold.fstab")
     For i = 0 To lp.Size -1
          ChkVal = lp.get(i) : ChkVal = ChkVal.Replace(":", " ")
          If ChkVal.ToLowerCase.StartsWith("dev_mount") Then
               dPaths.Add(SGW(ChkVal, 2) & ", " & SGW(ChkVal, 3))
          EndIf
     Next
     InputList(dPaths, "Device Mounting Paths", -1)
End Sub
Sub SGW(CStr As String, GE As Int) As String
     Dim t As List : Dim rs, sd As String : sd = " "
     t = Regex.Split(sd, CStr)
     rs = t.Get(GE-1)
     Return rs
End Sub

Thanks margret I will give it a try!

lymey · Sep 27, 2013

NJDude said:
DirRootExternal points to the INTERNAL SDCard, external SDCards are not really standard, there are several discussions about, it if you are curious, search the forums.

Thanks, I have been doing that without finding an answer for my problem unfortunately.

Android Question DirRootExternal

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