How do I upload picture and change app wallpaper

MIT App Inventor Help
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1

How do I upload a picture and change the app wallpaper to the picture, for app with many screen and for long time

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  1. Use an ImagePicker in Media to pick the image.

  2. Use the [FREE] Wallpaper Changer extension to change the wallpaper.

(Set DefaultFileScope to Legacy, and ask the Write permission)

2 Likes
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The [FREE] Wallpaper Changer is for the handphone wallpaper not for the app wallpaper

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Then use the BackgroundImage property in the Screen to change the background image of the app.

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Here is an example of something you might want.

AIA: app.aia (1.8 KB)

Blocks:

blocks

1 Like
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I think it's for 1st time only

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What do you mean?

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yes, after the app close, image picker is reset and the background is back to white

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Then you can use TinyDB to store the picture.

blocks (14)
blocks (14)740×518 36.8 KB

newapp.aia (2.2 KB)

Edit: Power Users, please correct me if I am wrong, maybe errors due to file storage.

3 Likes
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  1. On Android 11+, no permissions are required if the ImagePicker is used.

  2. No permissions are declared in the Manifest of your app / APK (newapp.aia).

  3. And therefore no permissions can and will not be requested on Android < 10.

  4. The PermissionDenied event is never triggered.

  5. Your app just crashes on Android < 10.

  6. The reason why permissions are needed on Android < 10 is because when using the ImagePicker, AI2 redirects the file to another directory. For Android ≥ 10 this is the ASD, but for Android < 10 it is the /Pictures folder.

  7. If you pick the image via ActivityStarter, no storage permissions are required on all Android versions.

    grafik
    grafik1177×443 34.2 KB

    app_2.aia (667.8 KB)

7 Likes
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See also here:

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I removed the Solution marker from post #9.

1 Like
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