FYI
I've managed to put together some code that reliably locates the microSD card
in 4 very different Android-based tablets. The approach involves 3 different
methods:
1. Search for a known folder on the SD card starting in the standard "/mnt"
folder using a breadth-first search strategy.
2. Search for a known folder on the SD card starting in the less standard
"/storage" folder using a breadth-first search strategy.
3. Search for a known folder using full paths that are used by specific
manufacturers. These look as though they should be located by method 1. (they
are all paths from "/mnt") but sometimes fail 1. however they work if the full
path is specified!
Here's my code for "findSDcard"...
----------------
on findSDcard
constant \
cSDcardRoot1 = "/mnt/ext_sdcard/Android/data/com.myorg.myapp/files", \
cSDcardRoot2 = "/mnt/sdcard2/Android/data/com.myorg.myapp/files", \
cSDcardRoot3 = "/mnt/m_external_sd/Android/data/com.myorg.myapp/files", \
cSDcardRoot4 = "/mnt/sdcard/Android/data/com.myorg.myapp/files", \
cSDcardRoot5 = "/mnt/extSdCard/Android/data/com.myorg.myapp/files", \
cSDcardRoot6 = "/mnt/external_sd/Android/data/com.myorg.myapp/files", \
cSDcardRoot7 = "/mnt/SDCard/Android/data/com.myorg.myapp/files"
global gDataPath -- /myapp-data
global gSDcard -- path to app's data folder
set wholeMatches to true
put empty into gSDcard
put (char 2 to -1 of gDataPath) into tTargetFolderName
if the platform is "android" then
put "/mnt" into tDeviceRoot
if there is a folder tDeviceRoot then
-- search in standard /mnt folders:
put empty into tFoundPath
folderExists tTargetFolderName, tDeviceRoot, tFoundPath
if tFoundPath is not empty then
put tFoundPath into gSDcard
end if
end if
if gSDcard is empty then
-- try non-standard /storage folders:
if there is a folder "/storage" then
-- search in non-standard /storage folders:
put "/storage" into tDeviceRoot
put empty into tFoundPath
folderExists tTargetFolderName, tDeviceRoot, tFoundPath
if tFoundPath is not empty then
put tFoundPath into gSDcard
end if
end if
end if
if gSDcard is empty then
-- try bespoke SD locations:
if there is a folder cSDcardRoot1 then
put cSDcardRoot1 into gSDcard -- Huawei
else if there is a folder cSDcardRoot2 then
put cSDcardRoot2 into gSDcard -- Amazon
else if there is a folder cSDcardRoot3 then
put cSDcardRoot3 into gSDcard -- Lenovo
else if there is a folder cSDcardRoot4 then
put cSDcardRoot4 into gSDcard -- Fusion
else if there is a folder cSDcardRoot5 then
put cSDcardRoot5 into gSDcard -- ??
else if there is a folder cSDcardRoot6 then
put cSDcardRoot6 into gSDcard -- ??
else if there is a folder cSDcardRoot7 then
put cSDcardRoot7 into gSDcard -- Hudl?
end if
end if
end if
end findSDcard
on folderExists pFolderName, pRootPath, @pFoundPath
constant cNoDotsRegex = "^\..*"
-- breadth-first search for a given folder
put empty into pPath
if there is a folder pRootPath then
put empty into tSubFolders
put folders(pRootPath) into tFolderList
filter lines of tFolderList without regex cNoDotsRegex
repeat for each line tFolder in tFolderList
if tFolder = pFolderName then
-- found it:
put pRootPath into pFoundPath
exit folderExists
else
-- add sub-folder to list for checking:
put pRootPath & "/" & tFolder & return after tSubFolders
end if
end repeat
if tSubFolders is empty then
exit folderExists
end if
repeat for each line tSubFolder in tSubFolders
folderExists pFolderName, tSubFolder, pFoundPath
if pFoundPath is not empty then
exit folderExists
end if
end repeat
end if
end folderExists
----------------
Note that the above was necessary because specialFolderPath("external
documents") doesn't work reliably across the 4 Android-based tablets I'm trying
to support.
If anyone has a more elegant or succinct method, please let me know. In the
meantime you're welcome to use the above code.
Peter
--
Peter Reid
Loughborough, UK
> On 28 Nov 2018, at 11:49am, Peter Reid <pr...@reidit.co.uk> wrote:
>
> I've got an app running on an Android 8.1 7in tablet which uses a microSD
> card for its RW data storage. I've tried using:
>
> specialFolderPath("external documents")
>
> which the docs describe as follows:
>
> • "external documents": The folder on the primary shared/external
> storage device where application-specific data can be placed
> but this doesn't point to the microSD.
>
> Instead I'm having to try to pause the app and then search around for the
> microSD. So far I've found 7 different locations for the microSD, depending
> on the model of tablet:
>
> 1. /mnt/ext_sdcard/Android/data/com.reidit.myapp/files
>
> 2. /mnt/sdcard2/Android/data/com.reidit.myapp/files
>
> 3. /mnt/m_external_sd/Android/data/com.reidit.myapp/files
>
> 4. /mnt/sdcard/Android/data/com.reidit.myapp/files
>
> 5. /mnt/extSdCard/Android/data/com.reidit.myapp/files
>
> 6. /mnt/external_sd/Android/data/com.reidit.myapp/files
>
> 7. /mnt/SDCard/Android/data/com.reidit.myapp/files
>
> where the ../files folder is located in the microSD filing system as follows:
>
> /Android
> /data
> /com.reidit.myapp
> /files
>
> Whenever I try to install my app on a different Android tablet, I have to go
> hunting for the exact filing system for the 1st part of the microSD:
>
> /mnt/<unknown>/
>
> The tail of /Android/data/com.reidit.myapp/files seems to be consistent. It
> seems that the only variable is the <unknown> part.
>
> However, I have 2 tablets (Android 5.1 and Android 8.1) where I haven't been
> able to locate the microSD card at all!
>
> Any suggestions about how to reliably locate the microSD card in an Android
> tablet?
>
> Peter
> --
> Peter Reid
> Loughborough, UK
>
_______________________________________________
use-livecode mailing list
use-livecode@lists.runrev.com
Please visit this url to subscribe, unsubscribe and manage your subscription
preferences:
http://lists.runrev.com/mailman/listinfo/use-livecode
