How do you save a file in the external sdcard?

MIT App Inventor Help
2

the higher the Android version of your device, the less likely you will be able to do it
see also the notes below the Copy method here App Inventor Extensions: File | Pura Vida Apps

Taifun

Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by Taifun.

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This example uses the @Taifun extension:
https://puravidaapps.com/file.php

  • You write in the TextBox a file name of the asset (uno.txt, kio4.png, gato.mp3) and choose in which SdCard you want to save it.
    copiar_sdcard
    copiar_sdcard892×861 66 KB

guardar_SdCard2

Guardar_SdCard.aia (92.2 KB)

1 Like
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Nice try @Juan_Antonio . NIce effort, but

fails
fails841×481 60.3 KB

:frowning: Thanks anyway. This fails on a Samsung A10 Tablet, Android 8.1 will try it again on a 4.2.2 tablet later

– Steve

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Grazie per la risposta, ciao.

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Grazie per la risposta.

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The external (removable) SD card can only be read (since Android 4.4, KitKat).

grafik
grafik1050×412 40.1 KB

1 Like
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See also here:

1 Like
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Grazie Anke

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It depends on the device.

My mobile is a Redmi 7 Xiaomi (not rooted) with Android 9.
My removable SdCard is an 8 GB microSdCard.
My Guardar_SdCard app is installed (Build) on the mobile.

In my new app I have added my extension: KIO4_Terminal, you can execute LINUX commands mkdir, cp, rmdir, …
In my Xiaomi - Android 9 I can create, delete directories … in the removable SdCard.
http://kio4.com/appinventor/278_extension_shell.htm

  • My extension KIO4_Terminal does not return a response.

guardar_22
guardar_22925×516 44.2 KB

removablesdcard Guardar_SdCard_2.aia (100.6 KB)

2 Likes
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Thanks for the information Juan Antonio. Yes, it does depend on the device as to what works.

I built the app. The app copies to /storage/emulated/0/ fine. It does not store to the physical sd Card on my Samsung Android 8.1 Tablet . I checked Settings>APPS>//Guardar_SdCard_2>Permissions ; the Storage indicates permissions are set. Screen1.AskForPermission WRITE_EXTERNAL_STORAGE works (since the app does have the permission), but the device does not allow writing.

Great this works on Android 9; it is still not working on the external sdCard (works fine on the 'internal sdCard).

Your code and extension does create/delete directories on the internal sdCard. Thanks. :slight_smile:

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Using the KIO4_Terminal.aix extension I have executed the LINUX: mount command to check how the SdCard is mounted on my Xiaomi 7 mobile (Android 9)
mount

I get that mount is of type sdcardfs

sdcardfs
sdcardfs1004×238 67.5 KB

Then I install the same SdCard on a Huawei 9+ (Android 6) and I get a type fuse mount. (I cannot create directories on a removable SdCard with this mobile)

fuse2
fuse2862×155 79 KB

Perhaps it is the type of mount fuse vs sdcardfs that allows or not, to be able to write to the removable SdCard.

borrar_terminal.aia (8.0 KB)

1 Like
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Great job, Juan !!!
I tested it on a Xiaomi Redmi Note 5 (Android 9) and it really works!
But unfortunately not on a Galaxy Note8 (Andorid 9).

When I run borrar_terminal.aia on Note8, I get the following result (Label1.txt):

grafik
grafik2030×1120 118 KB

Label1.txt (7.4 KB)

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@Anke, is the information you get from “Do it” different from what you get on the Label1 Screen?

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I don’t think so. I only attached it for better reading.

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No, I just copied & paste it.

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OK.

Mount type is sdcardfs

/mnt/media_rw/9C33-6BBD on /storage/9C33-6BBD type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,mask=18)
/data/knox/sdcard/150 on /storage/emulated/150 type sdcardfs

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Yes I have seen it:

grafik
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And now ...

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This is from my Xiaomi Note 5:

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It's a real shame that there is no way to save to the SD card. :upside_down_face:

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