Subdirectories within a directory are not automatically included. You need to include every directory in your pubspec.yaml. Not sure how things worked on the emulator without this. So you would have (according to your asset structure):

  assets:
    - assets/images/Antiguo
    - asests/images/Aparicion
    ...

Since the assets are within the assets/ folder, you also need to include that in your path:

Image.asset('assets/images/Kratos/kr1.jpg', ...);

Do a flutter clean and try building again.

are you getting any error in your terminal like: “Image not found or similar”, the first thing I saw from your image which isn’t too clear is that when you establish your images path in the pubspec.yaml you must be very carefull with spacing, it seems to me that you added one space instead of 2 and dont forget to add every subdirectory in you’re case you’re missing to add the directory of “Kratos”:

  assets:
    - assets/images/Kratos

So it would be like this:

[Space][Space]assets:
[Space][Space][Space][Space]-[Space]assets/images/Kratos

That should work wonders, hope I was able to give you any help.

I have created an app in flutter and when I test it on my mobile it does not show any image. Everything is fine, except the images.

I attach a picture of the pubspec.yaml, as I have the structure of assets and the cmd of how I create the apk. Each name in the images is a folder in which there are images inside.

I clarify that in Visual Studio Code that is where I have done it, in its emulator if the images are shown, but when I install the apk, no.

It is curious that if I add – assets/images/Atreus/ , when creating the apk, this weighs more (as it weighs more for that folder I added), but still not shown.

Thanks.

pubspec.yaml

structure assets

cmd

ADD: I have already fixed the red warning. It creates the apk without those warnings (I updated jdk to 15 and gradle to version 7.0.2), but the images are still not visible.

build apk

Code image:

 Image.asset(
   'images/Kratos/kr2.jpg',
   width: 100,
   height: 100,
   fit: BoxFit.cover,
 ),

Code image updated:

Code image:

 Image.asset(
   'assets/images/Kratos/kr2.jpg',
   width: 100,
   height: 100,
   fit: BoxFit.cover,
 ),

NEW: Now I get this error. I have version 1.5 on my computer but I don’t know how to select it.

version error

Now, when I change the version manually in build.gradle ext.kotlin_version = ‘1.5’ I get this error, and even if I do flutter clean again it doesn’t fix the problem.

build failed

Ok. Beginner’s mistake. I put the version ‘1.5’ but I should have put ‘1.5.0’ … Similarly, the apk is created without fail but the images are not displayed.

NEWS: Images are already shown! Many thanks to user2233706. I can’t give points for being a “newbie” but I appreciate it very much.