Problems with moving an image file to the asd

[Informatik_Projekt]

Hello,
I want to use the Taifun Image Extension to crop an image. To manipulate the image, it must be in the application specific directory.
However, I have issues moving a file to this location. Trying different possibilities I found online, I either get the error message, no such file could be found (when using Anke's tutorial or Taifun's file extension) or just a crash (when using the regular file component).

This is what I did using @Taifun 's extension:

This is what I did for @Anke 's extension:

And this is what I did with the regular blocks:

If somebody could help me with any of these solutions, this would be greatly appreciated.

[TIMAI2]

Where is the original image in Image1.Picture (full file path - show this in a label), how did it get there (was it created by the app or some other app), and what type of image file is it (jpg/png/other) ?

[Anke]

To cut a long story short, post the aia or a test aia.

[Informatik_Projekt]

This is the aia with all methods included:
Bildbeschnitt2 (1).aia (137.6 KB)

[Informatik_Projekt]

The file name (according to the Label) just "[Picturename].jpg" (without a slash at the start). I don't really know where exactly it lies.

[Anke]

Which Android version are you testing on?
Note: My guide was made before the nb188 release.

[TIMAI2]

@Informatik_Projekt

I don't really know where exactly it lies.

It is in your Assets (Media), where you put it !!

[Anke]

And do not hard-code the ASD (packageName):

file:///storage/emulated/0/Android/data/appinventor.ai_informatikprojekt.Bildbeschnitt2/files/image1.jpg

[TIMAI2]

@TIMAI2

It is in your Assets (Media)

You cannot move files from the assets, you have to copy them.

[Taifun]

@TIMAI2

you have to copy them.

Try the Copy method from the file component together with the correct scope Asset
http://ai2.appinventor.mit.edu/reference/components/storage.html#File.Scope

Taifun

[Informatik_Projekt]

Thank you!. The method appears to work (the app finds the path and doesn't throw an error message), but the image disappears when switching file place, although I changed the canvas background image accordingly.

Is the "/image1.png" path still wrong (not the asd)?

[Anke]

[Informatik_Projekt]

Thanks, that fixes the issue that the image doesn't appear, but a NullPointer Exception when trying to get the size of the image ("attempt to invoke virtual method "int android.graphics.Bitmap.getWidth() on a null object reference")

[TIMAI2]

It really helps if you show your relevant blocks, without them it is difficult to see what you are trying to achieve.

[Anke]

@Informatik_Projekt

but a NullPointer Exception when trying to get the size of the image

Of course, it doesn't work, because /image.jpg already redirects to the ASD with this ext.
Try this:

[Informatik_Projekt]

Thank you! Sorry, I'm kind of new to this and didn't understand the file system fully.

[Anke]

@Informatik_Projekt

I'm kind of new to this and didn't understand the file system fully.

See also here:

Some basics on Android storage system

From an Android point of view there are an → Internal Storage and an → External Storage . 1. Internal Storage The Internal Storage can only be accessed with a rooted device. 1.1 The app package is saved in /data/data/<packageName>/ In order to be able to debug your app, AI2 saves the assets for → Companion on devices with Android ≥ 10 (API ≥ 29): /storage/emulated/0/Android/data/edu.mit.appinventor.aicompanion3/files/assets/ Android < 10 : /storage/emulated/0/Android/data/edu.mit…