To call a function of a parent, you can use the callback pattern . In this example, a function on the color selected is passed to the child. The child calls the function when a button is pressed: import ‘package:flutter/material.
Read moreHow do you communicate with native Android on Flutter?
To send a message to native we use invokeMethod , as below. invokeMethod is an async method so we must add await and wrap the call inside an async (Future) method. If there is a result that’s sent back from native it will be assigned to the response variable.
Read moreCan I use native code in Flutter?
Flutter allows us to call platform-specific APIs available in Java or Kotlin code on Android and in Objective C or Swift code on iOS. Flutter’s platform-specific API works with message passing. From Flutter app, we have to send messages to a host on iOS or Android parts of the app over a platform channel.
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