How to find a directory?

MjK · Sep 15, 2012

Hi everybody,

I've got a very simple app on Google Play. It's an AddOn for another app. It just copies some files from dirassets to a subfolder of the other app.
This worked fine for more than a year now, but with more and more devices coming up, there more and more different directories where the app is installed.

For example, I am using the following directories:
/sd/
/mnt/sd/
/sdcard_externalsd/
/mnt/sdcard_externalsd/
/sdcard/external_sd/
/mnt/sdcard/external_sd/
and so on...

After some researches in this forum and the documentation i've tried
DirRootExternal
DirDefaultExternal
DirInternal

But none of them seem to work for some specific devices like Huawei, Medion or Archos.

Is there a way, how to find these directories on these devices without adding them manually?

Cheers, MjK

Erel · Sep 15, 2012

DirRootExternal and DirDefaultExternal return the path of the standard external storage. Some devices have more than one external storage. There is no standard API to find its path.

MjK · Sep 15, 2012

Thanks for fast answer, I was worried about this.

Hmm... So best solution is to ask my users, how these paths are called on their devices?

Would a customized search for "/appfolder/subfolder/" work?

Erel · Sep 16, 2012

Which folder are you looking for? The default folder of a different app? I would expect it to be similar to DirDefaultExternal.

MjK · Sep 17, 2012

So I am talking about that mapping application "Locus". Locus saves the databases, exports and so on in "/mnt/sdcard/Locus/subfolders/".
My addon "Locus Map Tweak" for this app just copies some files in one of these subfolders.

Could I do a search for a file located in /"Locus/data/" and is called "dbmain.sqll" and some code gives me the correct part of the file system, e.g. "/mnt/sdcard1/ext/"?

MjK · Sep 17, 2012

Too bad that there are different expressions to use in a search... :sign0104:

Found this older thread, which handles probably the same problem:
http://www.b4x.com/forum/basic4android-updates-questions/11511-how-find-folder.html#post64381

The code mentioned there, writes the correct path to the logs in the IDE, right?
Can someone give me a hint, how to read this path out of the logs?

Erel · Sep 18, 2012

The code in that link returns an empty string if the path was not found. Otherwise it returns the path.

MjK · Sep 18, 2012

Erel said:
The code in that link returns an empty string if the path was not found. Otherwise it returns the path.

Well, I don't expect any ready code, the fun part about learning would be missing
But I'd appreciate any hint to a working solution to do this task programmatically.

I've had 2 another ideas, how to solve it:
(1) Write a textfile with all directories and subdirectories and pick the matching path out of it.
(2) Start the other app and monitor every file changes.

Idea (1) seems the less complicated way, as there can be file changes made by the system itself at the same time.

Which part at the beginners guide do you recommend for this task?
And BTW, thanks for helping!

Erel · Sep 18, 2012

If the code in the link does what you need then you should use it. That code not only writes the path to the logs it also returns the result as the sub return value.

How to find a directory?

MjK

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