Updating the launch screen

Android
iOS

Flutter apps can include both code and assets
(sometimes called resources). An asset is a file
that is bundled and deployed with your app,
and is accessible at runtime. Common types of assets include
static data (for example, JSON files),
configuration files, icons, and images
(JPEG, WebP, GIF, animated WebP/GIF, PNG, BMP, and WBMP).

Specifying assets

Flutter uses the pubspec.yaml file,
located at the root of your project,
to identify assets required by an app.

Here is an example:

flutter

assets

assets/my_icon.png

assets/background.png

To include all assets under a directory,
specify the directory name with the / character at the end:

flutter

assets

directory/