Interesting approach. Of course, the downside is that if anything changes, the
method becomes ineffective for that new device or for all andriods if the
change is fundamental enough.
Bob S
> On Dec 19, 2018, at 03:37 , Peter Reid via use-livecode
> <use-livecode@lists.runrev.com> wrote:
>
> 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
_______________________________________________
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
