If you want your State.didChangeDependencies method to be called when a new route is pushed or popped above, just use this mixin.

navigation_notifier.dart

import 'package:flutter/material.dart';

/// When using this mixin by appending `with NavigationNotifierMixin` to
/// your [State], your [State.didChangeDependencies] method will be called
/// every time the [Navigator] pushes a route or pops any route above the
/// route your [StatefulWidget] lives in.
mixin NavigationNotifierMixin<T extends StatefulWidget> on State<T> {
  @override
  void didChangeDependencies() {
    // The TickerMode InheritedWidget changes when navigating,
    // causing didChangeDependencies of your State to be called.
    TickerMode.of(context);
    // This happens because you called inheritFromWidgetOfExactType
    // on the BuildContext in here, which causes it to notify you
    // when that InheritWidget changes.
    super.didChangeDependencies();
  }
}