Flutter: Call a function on a child widget's state

Question

I\'ve created a stateful widget and its parent widget needs to call a function that lives in the child\'s state.

Specifically, I have a class PlayerContainer that create

Answer 1

While Darren Cole's answer above does not work correctly, there is an easy way to circumvent the immediate problem. Instead of

State createState() => vpcs;

final VideoPlayerControllerState vpcs = VideoPlayerControllerState();

write:

State createState(){
  vpcs = VideoPlayerControllerState();
  return vpcs;
}

VideoPlayerControllerState vpcs;

This way, the state gets re-written everytime createState() is called, which avoids the Failed assertion: line 3819 pos 12: '_state._widget == null': is not true errors.

Still, I guess this is a somewhat hackish solution - can somebody point out a better one?