Flutter Hero Text Example.

main.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  void pushToNext() {
    Navigator.of(context).push(
      MaterialPageRoute(
        builder: (_) => Scaffold(
          body: Align(
            alignment: Alignment.topCenter,
            child: Hero(
              tag: 'Hero Text',
              child: Text(
                'Hero Text',
                style: TextStyle(color: Colors.black, inherit: false),
              ),
            ),
          ),
        ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Hero(
              tag: 'Hero Text',
              child: Text(
                'Hero Text',
                style: TextStyle(color: Colors.black, inherit: false),
              ),
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: pushToNext,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}