How to add assets in flutter Package/Plugin development?

Question

I am developing a flutter package containing some assets files. I mentioned required assets in pubsepc.yaml as usual like this

  assets:
    - assets/abc.xyz

and uploaded the package to https://pub.dartlang.org/.

After that I created a flutter Application and imported my developed package in pubspec.yaml like...

dependencies:
  flutter:
    sdk: flutter
  my_developed_package: ^0.0.1

Now everything is working fine except my assets are absent. I put some assets in my Application without mentioning in pubsepc.yaml and its working. I am unable to understand, how do I add these assets to my package so that they load automatically?

Answer 1

The following approach helped me for including assets (not only images but any type of file) in plugin development.

I put my assets under the lib folder like, my_plugin/lib/assets and in pubspec.yaml like this.

  assets:
    - packages/my_plugin/assets/asset_name
       
  # Be careful about indentation

It is mandatory to put your plugin assets in the lib directory, in other directories it won't work.

It has been added with the plugin and then I accessed them with a path like this packages/my_plugin/assets/asset_name, e.g.

File myAsset = File("packages/my_plugin/assets/asset_name");

By this approach, I was able to get an asset from Plugin not only Images.

For a complete example, you can check my plugin here.