How to change Flutter app icon dynamically at runtime like Google Calendar?

Question

I’m building a Flutter app and I want to change the app icon dynamically at runtime, similar to how Google Calendar or some other apps update their icons based on the date or events.

For example:

1. Google Calendar shows the current date on its icon.
2. Other apps change the icon depending on events or conditions.

• Community: Please provide enough code so others can better understand or reproduce the problem.
• rusty: See this QnA: How to implement Dynamic App Icon Change with flutter_app_icon_changer